diff --git a/.pylintrc b/.pylintrc
new file mode 100644
index 0000000..d9447d3
--- /dev/null
+++ b/.pylintrc
@@ -0,0 +1,647 @@
+[MAIN]
+
+# Analyse import fallback blocks. This can be used to support both Python 2 and
+# 3 compatible code, which means that the block might have code that exists
+# only in one or another interpreter, leading to false positives when analysed.
+analyse-fallback-blocks=no
+
+# Clear in-memory caches upon conclusion of linting. Useful if running pylint
+# in a server-like mode.
+clear-cache-post-run=no
+
+# Load and enable all available extensions. Use --list-extensions to see a list
+# all available extensions.
+#enable-all-extensions=
+
+# In error mode, messages with a category besides ERROR or FATAL are
+# suppressed, and no reports are done by default. Error mode is compatible with
+# disabling specific errors.
+#errors-only=
+
+# Always return a 0 (non-error) status code, even if lint errors are found.
+# This is primarily useful in continuous integration scripts.
+#exit-zero=
+
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code.
+extension-pkg-allow-list=
+
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code. (This is an alternative name to extension-pkg-allow-list
+# for backward compatibility.)
+extension-pkg-whitelist=
+
+# Return non-zero exit code if any of these messages/categories are detected,
+# even if score is above --fail-under value. Syntax same as enable. Messages
+# specified are enabled, while categories only check already-enabled messages.
+fail-on=
+
+# Specify a score threshold under which the program will exit with error.
+fail-under=10
+
+# Interpret the stdin as a python script, whose filename needs to be passed as
+# the module_or_package argument.
+#from-stdin=
+
+# Files or directories to be skipped. They should be base names, not paths.
+ignore=CVS
+
+# Add files or directories matching the regular expressions patterns to the
+# ignore-list. The regex matches against paths and can be in Posix or Windows
+# format. Because '\\' represents the directory delimiter on Windows systems,
+# it can't be used as an escape character.
+ignore-paths=
+
+# Files or directories matching the regular expression patterns are skipped.
+# The regex matches against base names, not paths. The default value ignores
+# Emacs file locks
+ignore-patterns=^\.#
+
+# List of module names for which member attributes should not be checked and
+# will not be imported (useful for modules/projects where namespaces are
+# manipulated during runtime and thus existing member attributes cannot be
+# deduced by static analysis). It supports qualified module names, as well as
+# Unix pattern matching.
+ignored-modules=
+
+# Python code to execute, usually for sys.path manipulation such as
+# pygtk.require().
+#init-hook=
+
+# Use multiple processes to speed up Pylint. Specifying 0 will auto-detect the
+# number of processors available to use, and will cap the count on Windows to
+# avoid hangs.
+jobs=1
+
+# Control the amount of potential inferred values when inferring a single
+# object. This can help the performance when dealing with large functions or
+# complex, nested conditions.
+limit-inference-results=100
+
+# List of plugins (as comma separated values of python module names) to load,
+# usually to register additional checkers.
+load-plugins=
+
+# Pickle collected data for later comparisons.
+persistent=yes
+
+# Resolve imports to .pyi stubs if available. May reduce no-member messages and
+# increase not-an-iterable messages.
+prefer-stubs=no
+
+# Minimum Python version to use for version dependent checks. Will default to
+# the version used to run pylint.
+py-version=3.11
+
+# Discover python modules and packages in the file system subtree.
+recursive=no
+
+# Add paths to the list of the source roots. Supports globbing patterns. The
+# source root is an absolute path or a path relative to the current working
+# directory used to determine a package namespace for modules located under the
+# source root.
+source-roots=
+
+# When enabled, pylint would attempt to guess common misconfiguration and emit
+# user-friendly hints instead of false-positive error messages.
+suggestion-mode=yes
+
+# Allow loading of arbitrary C extensions. Extensions are imported into the
+# active Python interpreter and may run arbitrary code.
+unsafe-load-any-extension=no
+
+# In verbose mode, extra non-checker-related info will be displayed.
+#verbose=
+
+
+[BASIC]
+
+# Naming style matching correct argument names.
+argument-naming-style=snake_case
+
+# Regular expression matching correct argument names. Overrides argument-
+# naming-style. If left empty, argument names will be checked with the set
+# naming style.
+#argument-rgx=
+
+# Naming style matching correct attribute names.
+attr-naming-style=snake_case
+
+# Regular expression matching correct attribute names. Overrides attr-naming-
+# style. If left empty, attribute names will be checked with the set naming
+# style.
+#attr-rgx=
+
+# Bad variable names which should always be refused, separated by a comma.
+bad-names=foo,
+          bar,
+          baz,
+          toto,
+          tutu,
+          tata
+
+# Bad variable names regexes, separated by a comma. If names match any regex,
+# they will always be refused
+bad-names-rgxs=
+
+# Naming style matching correct class attribute names.
+class-attribute-naming-style=any
+
+# Regular expression matching correct class attribute names. Overrides class-
+# attribute-naming-style. If left empty, class attribute names will be checked
+# with the set naming style.
+#class-attribute-rgx=
+
+# Naming style matching correct class constant names.
+class-const-naming-style=UPPER_CASE
+
+# Regular expression matching correct class constant names. Overrides class-
+# const-naming-style. If left empty, class constant names will be checked with
+# the set naming style.
+#class-const-rgx=
+
+# Naming style matching correct class names.
+class-naming-style=PascalCase
+
+# Regular expression matching correct class names. Overrides class-naming-
+# style. If left empty, class names will be checked with the set naming style.
+#class-rgx=
+
+# Naming style matching correct constant names.
+const-naming-style=UPPER_CASE
+
+# Regular expression matching correct constant names. Overrides const-naming-
+# style. If left empty, constant names will be checked with the set naming
+# style.
+#const-rgx=
+
+# Minimum line length for functions/classes that require docstrings, shorter
+# ones are exempt.
+docstring-min-length=-1
+
+# Naming style matching correct function names.
+function-naming-style=snake_case
+
+# Regular expression matching correct function names. Overrides function-
+# naming-style. If left empty, function names will be checked with the set
+# naming style.
+#function-rgx=
+
+# Good variable names which should always be accepted, separated by a comma.
+good-names=i,
+           j,
+           k,
+           ex,
+           Run,
+           _
+
+# Good variable names regexes, separated by a comma. If names match any regex,
+# they will always be accepted
+good-names-rgxs=
+
+# Include a hint for the correct naming format with invalid-name.
+include-naming-hint=no
+
+# Naming style matching correct inline iteration names.
+inlinevar-naming-style=any
+
+# Regular expression matching correct inline iteration names. Overrides
+# inlinevar-naming-style. If left empty, inline iteration names will be checked
+# with the set naming style.
+#inlinevar-rgx=
+
+# Naming style matching correct method names.
+method-naming-style=snake_case
+
+# Regular expression matching correct method names. Overrides method-naming-
+# style. If left empty, method names will be checked with the set naming style.
+#method-rgx=
+
+# Naming style matching correct module names.
+module-naming-style=snake_case
+
+# Regular expression matching correct module names. Overrides module-naming-
+# style. If left empty, module names will be checked with the set naming style.
+#module-rgx=
+
+# Colon-delimited sets of names that determine each other's naming style when
+# the name regexes allow several styles.
+name-group=
+
+# Regular expression which should only match function or class names that do
+# not require a docstring.
+no-docstring-rgx=^_
+
+# List of decorators that produce properties, such as abc.abstractproperty. Add
+# to this list to register other decorators that produce valid properties.
+# These decorators are taken in consideration only for invalid-name.
+property-classes=abc.abstractproperty
+
+# Regular expression matching correct type alias names. If left empty, type
+# alias names will be checked with the set naming style.
+#typealias-rgx=
+
+# Regular expression matching correct type variable names. If left empty, type
+# variable names will be checked with the set naming style.
+#typevar-rgx=
+
+# Naming style matching correct variable names.
+variable-naming-style=snake_case
+
+# Regular expression matching correct variable names. Overrides variable-
+# naming-style. If left empty, variable names will be checked with the set
+# naming style.
+#variable-rgx=
+
+
+[CLASSES]
+
+# Warn about protected attribute access inside special methods
+check-protected-access-in-special-methods=no
+
+# List of method names used to declare (i.e. assign) instance attributes.
+defining-attr-methods=__init__,
+                      __new__,
+                      setUp,
+                      asyncSetUp,
+                      __post_init__
+
+# List of member names, which should be excluded from the protected access
+# warning.
+exclude-protected=_asdict,_fields,_replace,_source,_make,os._exit
+
+# List of valid names for the first argument in a class method.
+valid-classmethod-first-arg=cls
+
+# List of valid names for the first argument in a metaclass class method.
+valid-metaclass-classmethod-first-arg=mcs
+
+
+[DESIGN]
+
+# List of regular expressions of class ancestor names to ignore when counting
+# public methods (see R0903)
+exclude-too-few-public-methods=
+
+# List of qualified class names to ignore when counting class parents (see
+# R0901)
+ignored-parents=
+
+# Maximum number of arguments for function / method.
+max-args=5
+
+# Maximum number of attributes for a class (see R0902).
+max-attributes=7
+
+# Maximum number of boolean expressions in an if statement (see R0916).
+max-bool-expr=5
+
+# Maximum number of branch for function / method body.
+max-branches=12
+
+# Maximum number of locals for function / method body.
+max-locals=15
+
+# Maximum number of parents for a class (see R0901).
+max-parents=7
+
+# Maximum number of positional arguments for function / method.
+max-positional-arguments=5
+
+# Maximum number of public methods for a class (see R0904).
+max-public-methods=20
+
+# Maximum number of return / yield for function / method body.
+max-returns=6
+
+# Maximum number of statements in function / method body.
+max-statements=50
+
+# Minimum number of public methods for a class (see R0903).
+min-public-methods=2
+
+
+[EXCEPTIONS]
+
+# Exceptions that will emit a warning when caught.
+overgeneral-exceptions=builtins.BaseException,builtins.Exception
+
+
+[FORMAT]
+
+# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
+expected-line-ending-format=
+
+# Regexp for a line that is allowed to be longer than the limit.
+ignore-long-lines=^\s*(# )?<?https?://\S+>?$
+
+# Number of spaces of indent required inside a hanging or continued line.
+indent-after-paren=4
+
+# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
+# tab).
+indent-string='    '
+
+# Maximum number of characters on a single line.
+max-line-length=100
+
+# Maximum number of lines in a module.
+max-module-lines=1000
+
+# Allow the body of a class to be on the same line as the declaration if body
+# contains single statement.
+single-line-class-stmt=no
+
+# Allow the body of an if to be on the same line as the test if there is no
+# else.
+single-line-if-stmt=no
+
+
+[IMPORTS]
+
+# List of modules that can be imported at any level, not just the top level
+# one.
+allow-any-import-level=
+
+# Allow explicit reexports by alias from a package __init__.
+allow-reexport-from-package=no
+
+# Allow wildcard imports from modules that define __all__.
+allow-wildcard-with-all=no
+
+# Deprecated modules which should not be used, separated by a comma.
+deprecated-modules=
+
+# Output a graph (.gv or any supported image format) of external dependencies
+# to the given file (report RP0402 must not be disabled).
+ext-import-graph=
+
+# Output a graph (.gv or any supported image format) of all (i.e. internal and
+# external) dependencies to the given file (report RP0402 must not be
+# disabled).
+import-graph=
+
+# Output a graph (.gv or any supported image format) of internal dependencies
+# to the given file (report RP0402 must not be disabled).
+int-import-graph=
+
+# Force import order to recognize a module as part of the standard
+# compatibility libraries.
+known-standard-library=
+
+# Force import order to recognize a module as part of a third party library.
+known-third-party=enchant
+
+# Couples of modules and preferred modules, separated by a comma.
+preferred-modules=
+
+
+[LOGGING]
+
+# The type of string formatting that logging methods do. `old` means using %
+# formatting, `new` is for `{}` formatting.
+logging-format-style=old
+
+# Logging modules to check that the string format arguments are in logging
+# function parameter format.
+logging-modules=logging
+
+
+[MESSAGES CONTROL]
+
+# Only show warnings with the listed confidence levels. Leave empty to show
+# all. Valid levels: HIGH, CONTROL_FLOW, INFERENCE, INFERENCE_FAILURE,
+# UNDEFINED.
+confidence=HIGH,
+           CONTROL_FLOW,
+           INFERENCE,
+           INFERENCE_FAILURE,
+           UNDEFINED
+
+# Disable the message, report, category or checker with the given id(s). You
+# can either give multiple identifiers separated by comma (,) or put this
+# option multiple times (only on the command line, not in the configuration
+# file where it should appear only once). You can also use "--disable=all" to
+# disable everything first and then re-enable specific checks. For example, if
+# you want to run only the similarities checker, you can use "--disable=all
+# --enable=similarities". If you want to run only the classes checker, but have
+# no Warning level messages displayed, use "--disable=all --enable=classes
+# --disable=W".
+disable=raw-checker-failed,
+        bad-inline-option,
+        locally-disabled,
+        file-ignored,
+        suppressed-message,
+        useless-suppression,
+        deprecated-pragma,
+        use-symbolic-message-instead,
+        use-implicit-booleaness-not-comparison-to-string,
+        use-implicit-booleaness-not-comparison-to-zero
+
+# Enable the message, report, category or checker with the given id(s). You can
+# either give multiple identifier separated by comma (,) or put this option
+# multiple time (only on the command line, not in the configuration file where
+# it should appear only once). See also the "--disable" option for examples.
+enable=
+
+
+[METHOD_ARGS]
+
+# List of qualified names (i.e., library.method) which require a timeout
+# parameter e.g. 'requests.api.get,requests.api.post'
+timeout-methods=requests.api.delete,requests.api.get,requests.api.head,requests.api.options,requests.api.patch,requests.api.post,requests.api.put,requests.api.request
+
+
+[MISCELLANEOUS]
+
+# List of note tags to take in consideration, separated by a comma.
+notes=FIXME,
+      XXX,
+      TODO
+
+# Regular expression of note tags to take in consideration.
+notes-rgx=
+
+
+[REFACTORING]
+
+# Maximum number of nested blocks for function / method body
+max-nested-blocks=5
+
+# Complete name of functions that never returns. When checking for
+# inconsistent-return-statements if a never returning function is called then
+# it will be considered as an explicit return statement and no message will be
+# printed.
+never-returning-functions=sys.exit,argparse.parse_error
+
+# Let 'consider-using-join' be raised when the separator to join on would be
+# non-empty (resulting in expected fixes of the type: ``"- " + " -
+# ".join(items)``)
+suggest-join-with-non-empty-separator=yes
+
+
+[REPORTS]
+
+# Python expression which should return a score less than or equal to 10. You
+# have access to the variables 'fatal', 'error', 'warning', 'refactor',
+# 'convention', and 'info' which contain the number of messages in each
+# category, as well as 'statement' which is the total number of statements
+# analyzed. This score is used by the global evaluation report (RP0004).
+evaluation=max(0, 0 if fatal else 10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10))
+
+# Template used to display messages. This is a python new-style format string
+# used to format the message information. See doc for all details.
+msg-template=
+
+# Set the output format. Available formats are: text, parseable, colorized,
+# json2 (improved json format), json (old json format) and msvs (visual
+# studio). You can also give a reporter class, e.g.
+# mypackage.mymodule.MyReporterClass.
+#output-format=
+
+# Tells whether to display a full report or only the messages.
+reports=no
+
+# Activate the evaluation score.
+score=yes
+
+
+[SIMILARITIES]
+
+# Comments are removed from the similarity computation
+ignore-comments=yes
+
+# Docstrings are removed from the similarity computation
+ignore-docstrings=yes
+
+# Imports are removed from the similarity computation
+ignore-imports=yes
+
+# Signatures are removed from the similarity computation
+ignore-signatures=yes
+
+# Minimum lines number of a similarity.
+min-similarity-lines=4
+
+
+[SPELLING]
+
+# Limits count of emitted suggestions for spelling mistakes.
+max-spelling-suggestions=4
+
+# Spelling dictionary name. No available dictionaries : You need to install
+# both the python package and the system dependency for enchant to work.
+spelling-dict=
+
+# List of comma separated words that should be considered directives if they
+# appear at the beginning of a comment and should not be checked.
+spelling-ignore-comment-directives=fmt: on,fmt: off,noqa:,noqa,nosec,isort:skip,mypy:
+
+# List of comma separated words that should not be checked.
+spelling-ignore-words=
+
+# A path to a file that contains the private dictionary; one word per line.
+spelling-private-dict-file=
+
+# Tells whether to store unknown words to the private dictionary (see the
+# --spelling-private-dict-file option) instead of raising a message.
+spelling-store-unknown-words=no
+
+
+[STRING]
+
+# This flag controls whether inconsistent-quotes generates a warning when the
+# character used as a quote delimiter is used inconsistently within a module.
+check-quote-consistency=no
+
+# This flag controls whether the implicit-str-concat should generate a warning
+# on implicit string concatenation in sequences defined over several lines.
+check-str-concat-over-line-jumps=no
+
+
+[TYPECHECK]
+
+# List of decorators that produce context managers, such as
+# contextlib.contextmanager. Add to this list to register other decorators that
+# produce valid context managers.
+contextmanager-decorators=contextlib.contextmanager
+
+# List of members which are set dynamically and missed by pylint inference
+# system, and so shouldn't trigger E1101 when accessed. Python regular
+# expressions are accepted.
+generated-members=
+
+# Tells whether to warn about missing members when the owner of the attribute
+# is inferred to be None.
+ignore-none=yes
+
+# This flag controls whether pylint should warn about no-member and similar
+# checks whenever an opaque object is returned when inferring. The inference
+# can return multiple potential results while evaluating a Python object, but
+# some branches might not be evaluated, which results in partial inference. In
+# that case, it might be useful to still emit no-member and other checks for
+# the rest of the inferred objects.
+ignore-on-opaque-inference=yes
+
+# List of symbolic message names to ignore for Mixin members.
+ignored-checks-for-mixins=no-member,
+                          not-async-context-manager,
+                          not-context-manager,
+                          attribute-defined-outside-init
+
+# List of class names for which member attributes should not be checked (useful
+# for classes with dynamically set attributes). This supports the use of
+# qualified names.
+ignored-classes=optparse.Values,thread._local,_thread._local,argparse.Namespace
+
+# Show a hint with possible names when a member name was not found. The aspect
+# of finding the hint is based on edit distance.
+missing-member-hint=yes
+
+# The minimum edit distance a name should have in order to be considered a
+# similar match for a missing member name.
+missing-member-hint-distance=1
+
+# The total number of similar names that should be taken in consideration when
+# showing a hint for a missing member.
+missing-member-max-choices=1
+
+# Regex pattern to define which classes are considered mixins.
+mixin-class-rgx=.*[Mm]ixin
+
+# List of decorators that change the signature of a decorated function.
+signature-mutators=
+
+
+[VARIABLES]
+
+# List of additional names supposed to be defined in builtins. Remember that
+# you should avoid defining new builtins when possible.
+additional-builtins=
+
+# Tells whether unused global variables should be treated as a violation.
+allow-global-unused-variables=yes
+
+# List of names allowed to shadow builtins
+allowed-redefined-builtins=
+
+# List of strings which can identify a callback function by name. A callback
+# name must start or end with one of those strings.
+callbacks=cb_,
+          _cb
+
+# A regular expression matching the name of dummy variables (i.e. expected to
+# not be used).
+dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_
+
+# Argument names that match this expression will be ignored.
+ignored-argument-names=_.*|^ignored_|^unused_
+
+# Tells whether we should check for unused import in __init__ files.
+init-import=no
+
+# List of qualified module names which can have objects that can redefine
+# builtins.
+redefining-builtins-modules=six.moves,past.builtins,future.builtins,builtins,io
diff --git a/__pycache__/main.cpython-311-pytest-8.3.4.pyc b/__pycache__/main.cpython-311-pytest-8.3.4.pyc
new file mode 100644
index 0000000..8427db9
Binary files /dev/null and b/__pycache__/main.cpython-311-pytest-8.3.4.pyc differ
diff --git a/__pycache__/main.cpython-311.pyc b/__pycache__/main.cpython-311.pyc
new file mode 100644
index 0000000..4e797f3
Binary files /dev/null and b/__pycache__/main.cpython-311.pyc differ
diff --git a/__pycache__/pets.cpython-311.pyc b/__pycache__/pets.cpython-311.pyc
new file mode 100644
index 0000000..86fd597
Binary files /dev/null and b/__pycache__/pets.cpython-311.pyc differ
diff --git a/__pycache__/test_main.cpython-311-pytest-8.3.4.pyc b/__pycache__/test_main.cpython-311-pytest-8.3.4.pyc
new file mode 100644
index 0000000..bd46014
Binary files /dev/null and b/__pycache__/test_main.cpython-311-pytest-8.3.4.pyc differ
diff --git a/images/buddy.jpg b/images/buddy.jpg
new file mode 100644
index 0000000..4386ae6
Binary files /dev/null and b/images/buddy.jpg differ
diff --git a/images/mittens.jpg b/images/mittens.jpg
new file mode 100644
index 0000000..1a07043
Binary files /dev/null and b/images/mittens.jpg differ
diff --git a/images/rex.jpg b/images/rex.jpg
new file mode 100644
index 0000000..9cade2e
Binary files /dev/null and b/images/rex.jpg differ
diff --git a/init_db.py b/init_db.py
new file mode 100644
index 0000000..8e302e8
--- /dev/null
+++ b/init_db.py
@@ -0,0 +1,53 @@
+import sqlite3
+import random
+
+def create_database_tables(conn):
+    cursor = conn.cursor()
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS animals (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            name TEXT NOT NULL,
+            species TEXT NOT NULL,
+            breed TEXT,
+            age INTEGER,
+            personality TEXT,
+            image_path TEXT,
+            adoption_status TEXT DEFAULT 'Available'
+        )
+    ''')
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS adopters (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            username TEXT UNIQUE NOT NULL,
+            password TEXT NOT NULL,
+            email TEXT UNIQUE,
+            join_date TEXT DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    conn.commit()
+
+def populate_initial_data(conn):
+    cursor = conn.cursor()
+    
+    # Sample animals data
+    animals = [
+        ('Luna', 'Dog', 'Labrador Mix', 2, 'Playful and energetic', '/images/luna.jpg', 'Available'),
+        ('Oliver', 'Cat', 'Tabby', 4, 'Independent but affectionate', '/images/oliver.jpg', 'Available'),
+        ('Max', 'Dog', 'German Shepherd', 3, 'Loyal and intelligent', '/images/max.jpg', 'Available')
+    ]
+    
+    for animal in animals:
+        cursor.execute('''
+            INSERT INTO animals (name, species, breed, age, personality, image_path, adoption_status) 
+            VALUES (?, ?, ?, ?, ?, ?, ?)
+        ''', animal)
+    
+    conn.commit()
+
+if __name__ == "__main__":
+    print("Initializing PawsAndWhiskers adoption database...")
+    conn = sqlite3.connect('animal_shelter.db')
+    create_database_tables(conn)
+    populate_initial_data(conn)
+    print("Database setup complete!")
+    conn.close()
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..1345dc6
--- /dev/null
+++ b/main.py
@@ -0,0 +1,342 @@
+from flask import Flask, jsonify, request, send_from_directory
+from flask_cors import CORS
+from flasgger import Swagger
+import os
+from pets import add_pet, update_pet, delete_pet, search_pets, reset_pets
+
+app = Flask(__name__)
+app.secret_key = "test_secret_key"
+CORS(app)
+
+# Set up Swagger documentation
+swagger_config = {
+    "title": "Animal Shelter API",
+    "version": "1.0.0",
+    "description": "API for animal adoption management"
+}
+swagger = Swagger(app, config=swagger_config)
+
+# Mock data for testing
+ANIMALS = [
+    {
+        "id": 1,
+        "name": "Luna",
+        "species": "Dog",
+        "breed": "Labrador Mix",
+        "age": 2,
+        "personality": "Playful and energetic",
+        "image_path": "/images/luna.jpg",
+        "adoption_status": "Available"
+    },
+    {
+        "id": 2,
+        "name": "Oliver",
+        "species": "Cat",
+        "breed": "Tabby",
+        "age": 4,
+        "personality": "Independent but affectionate",
+        "image_path": "/images/oliver.jpg",
+        "adoption_status": "Available"
+    },
+    {
+        "id": 3,
+        "name": "Max",
+        "species": "Dog",
+        "breed": "German Shepherd",
+        "age": 3,
+        "personality": "Loyal and intelligent",
+        "image_path": "/images/max.jpg",
+        "adoption_status": "Available"
+    }
+]
+
+USERS = [
+    {
+        "id": 1, 
+        "username": "admin",
+        # In a real app, this would be hashed, but for testing it's plain text
+        "password": "admin123",
+        "email": "admin@example.com"
+    }
+]
+
+# User registration endpoint
+@app.route('/api/register', methods=['POST'])
+def register_user():
+    """
+    Register a new adopter
+    ---
+    parameters:
+      - in: body
+        name: user
+        description: User registration details
+        schema:
+          type: object
+          required:
+            - username
+            - password
+            - email
+          properties:
+            username:
+              type: string
+            password:
+              type: string
+            email:
+              type: string
+    responses:
+        201:
+            description: User registered successfully
+        400:
+            description: Missing required fields
+        409:
+            description: Username already exists
+    """
+    data = request.get_json()
+    username = data.get('username')
+    password = data.get('password')
+    email = data.get('email')
+
+    if not username or not password or not email:
+        return jsonify({'error': 'All fields are required'}), 400
+
+    # Check if username already exists
+    if any(user['username'] == username for user in USERS):
+        return jsonify({'error': 'Username already exists'}), 409
+
+    # Check if email already exists
+    if any(user['email'] == email for user in USERS):
+        return jsonify({'error': 'Email already registered'}), 409
+
+    # Create new user
+    new_user = {
+        "id": len(USERS) + 1,
+        "username": username,
+        "password": password,  # In real app, would be hashed
+        "email": email
+    }
+    USERS.append(new_user)
+    
+    return jsonify({'message': 'Registration successful!', 'user_id': new_user['id']}), 201
+
+# User login endpoint
+@app.route('/api/login', methods=['POST'])
+def authenticate_user():
+    """
+    User login
+    ---
+    parameters:
+      - in: body
+        name: credentials
+        description: Login credentials
+        schema:
+          type: object
+          required:
+            - username
+            - password
+          properties:
+            username:
+              type: string
+            password:
+              type: string
+    responses:
+        200:
+            description: Login successful
+        401:
+            description: Invalid credentials
+    """
+    data = request.get_json()
+    username = data.get('username')
+    password = data.get('password')
+
+    if not username or not password:
+        return jsonify({'error': 'Username and password required'}), 400
+
+    # Find user by username
+    user = next((user for user in USERS if user['username'] == username), None)
+    
+    if not user or user['password'] != password:
+        return jsonify({'error': 'Invalid username or password'}), 401
+    
+    return jsonify({
+        'message': 'Login successful',
+        'user_id': user['id'],
+        'username': user['username'],
+        'email': user['email']
+    }), 200
+
+# Animal routes
+@app.route('/api/animals', methods=['GET'])
+def list_animals():
+    """
+    Get all available animals
+    ---
+    responses:
+        200:
+            description: List of available animals
+    """
+    # Filter only available animals
+    available_animals = [animal for animal in ANIMALS if animal['adoption_status'] == 'Available']
+    return jsonify(available_animals), 200
+
+@app.route('/api/animals/<int:animal_id>', methods=['GET'])
+def animal_details(animal_id):
+    """
+    Get details for a specific animal
+    ---
+    parameters:
+      - name: animal_id
+        in: path
+        type: integer
+        required: true
+    responses:
+        200:
+            description: Animal details
+        404:
+            description: Animal not found
+    """
+    animal = next((animal for animal in ANIMALS if animal['id'] == animal_id), None)
+    
+    if not animal:
+        return jsonify({'error': 'Animal not found'}), 404
+        
+    return jsonify(animal), 200
+
+@app.route('/api/animals/<int:animal_id>/adopt', methods=['POST'])
+def adopt_animal(animal_id):
+    """
+    Adopt an animal
+    ---
+    parameters:
+      - name: animal_id
+        in: path
+        type: integer
+        required: true
+      - in: body
+        name: adoption
+        schema:
+          type: object
+          required:
+            - user_id
+          properties:
+            user_id:
+              type: integer
+    responses:
+        200:
+            description: Adoption successful
+        404:
+            description: Animal not found
+        400:
+            description: Animal not available for adoption
+    """
+    data = request.get_json()
+    user_id = data.get('user_id')
+    
+    if not user_id:
+        return jsonify({'error': 'User ID required'}), 400
+        
+    # Find the animal
+    animal_index = next((i for i, animal in enumerate(ANIMALS) if animal['id'] == animal_id), None)
+    
+    if animal_index is None:
+        return jsonify({'error': 'Animal not found'}), 404
+        
+    # Check if animal is available
+    if ANIMALS[animal_index]['adoption_status'] != 'Available':
+        return jsonify({'error': 'Animal not available for adoption'}), 400
+        
+    # Update status to adopted
+    ANIMALS[animal_index]['adoption_status'] = 'Adopted'
+    
+    return jsonify({
+        'message': 'Adoption successful',
+        'animal': ANIMALS[animal_index]
+    }), 200
+
+@app.route('/api/animals/search', methods=['GET'])
+def search_animals():
+    """
+    Search for animals with filters
+    ---
+    parameters:
+      - name: species
+        in: query
+        type: string
+        required: false
+      - name: min_age
+        in: query
+        type: integer
+        required: false
+      - name: max_age
+        in: query
+        type: integer
+        required: false
+    responses:
+        200:
+            description: Search results
+    """
+    species = request.args.get('species')
+    min_age = request.args.get('min_age')
+    max_age = request.args.get('max_age')
+    
+    results = ANIMALS.copy()
+    
+    # Apply filters
+    if species:
+        results = [animal for animal in results if animal['species'].lower() == species.lower()]
+        
+    if min_age:
+        results = [animal for animal in results if animal['age'] >= int(min_age)]
+        
+    if max_age:
+        results = [animal for animal in results if animal['age'] <= int(max_age)]
+    
+    return jsonify(results), 200
+
+# Serve images of animals 
+@app.route('/images/<path:filename>')
+def serve_image(filename):
+    return send_from_directory(os.path.join(app.root_path, 'static/images'), filename)
+
+@app.route('/')
+def homepage():
+    return """
+    <h1>Animal Shelter API</h1>
+    <p>Welcome to our animal adoption platform!</p>
+    <a href="/apidocs">View API Documentation</a>
+    """
+# Add a new pet
+@app.route('/api/pets', methods=['POST'])
+def add_new_pet():
+    pet_data = request.get_json()
+    return add_pet(pet_data)
+
+# Update an existing pet
+@app.route('/api/pets/<int:pet_id>', methods=['PUT'])
+def update_existing_pet(pet_id):
+    pet_data = request.get_json()
+    return update_pet(pet_id, pet_data)
+
+# Delete a pet
+@app.route('/api/pets/<int:pet_id>', methods=['DELETE'])
+def remove_pet(pet_id):
+    return delete_pet(pet_id)
+
+# Search for pets
+@app.route('/api/pets/search', methods=['GET'])
+def search_for_pets():
+    return search_pets(request.args)
+
+# Reset pets data (for testing)      
+@app.route('/api/pets/reset', methods=['POST'])
+def reset_pets_data():
+    """
+    Reset the pets data to initial state.
+    ---
+    responses:
+        200:
+            description: Pets data reset successfully
+    """
+    reset_pets()
+    return jsonify({'message': 'Pets data reset successfully'}), 200
+if __name__ == '__main__':
+    app.run(debug=True)
\ No newline at end of file
diff --git a/pets.py b/pets.py
new file mode 100644
index 0000000..f2224ff
--- /dev/null
+++ b/pets.py
@@ -0,0 +1,293 @@
+from flask import jsonify, request
+
+# In-memory pet data for testing
+PETS = [
+    {
+        "id": 1,
+        "name": "Buddy",
+        "breed": "Golden Retriever",
+        "age": 3,
+        "temperament": "Friendly",
+        "pictureUrl": "/images/buddy.jpg"
+    },
+    {
+        "id": 2,
+        "name": "Whiskers",
+        "breed": "Siamese Cat",
+        "age": 2,
+        "temperament": "Independent",
+        "pictureUrl": "/images/whiskers.jpg"
+    },
+    {
+        "id": 3,
+        "name": "Rex",
+        "breed": "German Shepherd",
+        "age": 4,
+        "temperament": "Protective",
+        "pictureUrl": "/images/rex.jpg"
+    }
+]
+
+class PetNotFoundError(Exception):
+    """Exception raised when a pet is not found."""
+    pass
+
+def get_pets():
+    """Get a list of available pets.
+    ---
+    responses:
+        200:
+            description: A list of pets
+            schema:
+                type: array
+                items:
+                    $ref: '#/definitions/Pet'
+        500:
+            description: Internal Server Error
+    definitions:
+        Pet:
+            type: object
+            properties:
+                id:
+                    type: integer
+                name:
+                    type: string
+                breed:
+                    type: string
+                age:
+                    type: integer
+                temperament:
+                    type: string
+                pictureUrl:
+                    type: string
+    """
+    try:
+        # Return a copy of the pets list to avoid unintended modifications
+        return jsonify(PETS.copy()), 200
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        return jsonify({'error': 'Internal Server Error'}), 500
+
+def get_pet(pet_id):
+    """Get a pet by its ID.
+    ---
+    parameters:
+      - name: pet_id
+        in: path
+        type: integer
+        required: true
+        description: Unique identifier of the pet
+    responses:
+        200:
+            description: A single pet
+            schema:
+                $ref: '#/definitions/Pet'
+        404:
+            description: Pet not found
+        500:
+            description: Internal Server Error
+    """
+    try:
+        # Find the pet with the given ID
+        pet = next((p for p in PETS if p["id"] == pet_id), None)
+        
+        if pet is None:
+            return jsonify({'error': 'Pet not found'}), 404
+            
+        return jsonify(pet), 200
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        return jsonify({'error': 'Internal Server Error'}), 500
+
+def add_pet(pet_data):
+    """Add a new pet to the system.
+    ---
+    parameters:
+      - name: pet
+        in: body
+        required: true
+        schema:
+            $ref: '#/definitions/Pet'
+    responses:
+        201:
+            description: Pet created successfully
+        400:
+            description: Invalid pet data
+        500:
+            description: Internal Server Error
+    """
+    try:
+        # Validate required fields
+        required_fields = ['name', 'breed', 'age', 'temperament']
+        for field in required_fields:
+            if field not in pet_data:
+                return jsonify({'error': f'Missing required field: {field}'}), 400
+        
+        # Generate a new ID (in a real app, the database would handle this)
+        new_id = max(pet["id"] for pet in PETS) + 1 if PETS else 1
+        
+        # Create new pet with the generated ID
+        new_pet = {
+            "id": new_id,
+            "name": pet_data["name"],
+            "breed": pet_data["breed"],
+            "age": pet_data["age"],
+            "temperament": pet_data["temperament"],
+            "pictureUrl": pet_data.get("pictureUrl", "/images/default.jpg")
+        }
+        
+        # Add to our list
+        PETS.append(new_pet)
+        
+        return jsonify(new_pet), 201
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        return jsonify({'error': 'Internal Server Error'}), 500
+
+def update_pet(pet_id, pet_data):
+    """Update an existing pet.
+    ---
+    parameters:
+      - name: pet_id
+        in: path
+        type: integer
+        required: true
+        description: Unique identifier of the pet
+      - name: pet
+        in: body
+        required: true
+        schema:
+            $ref: '#/definitions/Pet'
+    responses:
+        200:
+            description: Pet updated successfully
+        404:
+            description: Pet not found
+        500:
+            description: Internal Server Error
+    """
+    try:
+        # Find the pet with the given ID
+        pet_index = next((i for i, p in enumerate(PETS) if p["id"] == pet_id), None)
+        
+        if pet_index is None:
+            return jsonify({'error': 'Pet not found'}), 404
+            
+        # Update pet fields that are provided
+        for key, value in pet_data.items():
+            if key != 'id':  # Don't allow changing the ID
+                PETS[pet_index][key] = value
+                
+        return jsonify(PETS[pet_index]), 200
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        return jsonify({'error': 'Internal Server Error'}), 500
+
+def delete_pet(pet_id):
+    """Delete a pet.
+    ---
+    parameters:
+      - name: pet_id
+        in: path
+        type: integer
+        required: true
+        description: Unique identifier of the pet
+    responses:
+        204:
+            description: Pet deleted successfully
+        404:
+            description: Pet not found
+        500:
+            description: Internal Server Error
+    """
+    try:
+        # Find the pet with the given ID
+        pet_index = next((i for i, p in enumerate(PETS) if p["id"] == pet_id), None)
+        
+        if pet_index is None:
+            return jsonify({'error': 'Pet not found'}), 404
+            
+        # Remove the pet
+        deleted_pet = PETS.pop(pet_index)
+        
+        return '', 204  # No content response for successful deletion
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        return jsonify({'error': 'Internal Server Error'}), 500
+
+def search_pets(query_params):
+    """Search for pets based on criteria.
+    ---
+    parameters:
+      - name: breed
+        in: query
+        type: string
+        required: false
+      - name: min_age
+        in: query
+        type: integer
+        required: false
+      - name: max_age
+        in: query
+        type: integer
+        required: false
+    responses:
+        200:
+            description: List of matching pets
+        500:
+            description: Internal Server Error
+    """
+    try:
+        filtered_pets = PETS.copy()
+        
+        # Filter by breed if specified
+        if 'breed' in query_params:
+            breed = query_params.get('breed')
+            filtered_pets = [p for p in filtered_pets if breed.lower() in p['breed'].lower()]
+            
+        # Filter by minimum age if specified
+        if 'min_age' in query_params:
+            min_age = int(query_params.get('min_age'))
+            filtered_pets = [p for p in filtered_pets if p['age'] >= min_age]
+            
+        # Filter by maximum age if specified
+        if 'max_age' in query_params:
+            max_age = int(query_params.get('max_age'))
+            filtered_pets = [p for p in filtered_pets if p['age'] <= max_age]
+            
+        return jsonify(filtered_pets), 200
+    except Exception as e:
+        print(f"An error occurred: {e}")
+        return jsonify({'error': 'Internal Server Error'}), 500
+
+# Helper function to reset data (useful for testing)
+def reset_pets():
+    """Reset the pets data to initial state."""
+    global PETS
+    
+    PETS = [
+        {
+            "id": 1,
+            "name": "Buddy",
+            "breed": "Golden Retriever",
+            "age": 3,
+            "temperament": "Friendly",
+            "pictureUrl": "/images/buddy.jpg"
+        },
+        {
+            "id": 2,
+            "name": "Whiskers",
+            "breed": "Siamese Cat",
+            "age": 2,
+            "temperament": "Independent",
+            "pictureUrl": "/images/whiskers.jpg"
+        },
+        {
+            "id": 3,
+            "name": "Rex",
+            "breed": "German Shepherd",
+            "age": 4,
+            "temperament": "Protective",
+            "pictureUrl": "/images/rex.jpg"
+        }
+    ]
\ No newline at end of file
diff --git a/pets_adoption.db b/pets_adoption.db
new file mode 100644
index 0000000..a47920f
Binary files /dev/null and b/pets_adoption.db differ
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..a9f380d
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,12 @@
+Flask==3.1.1
+Flask-Cors==5.0.2
+flasgger==0.9.7.1
+Werkzeug==3.1.3
+Jinja2==3.1.5
+itsdangerous==2.2.0
+MarkupSafe==3.0.2
+click==8.1.8
+blinker==1.9.0
+PyYAML==6.0.2
+mistune==3.1.2
+jsonschema==4.24.0
\ No newline at end of file
diff --git a/test_main.py b/test_main.py
new file mode 100644
index 0000000..dd730da
--- /dev/null
+++ b/test_main.py
@@ -0,0 +1,124 @@
+import pytest
+import sqlite3
+import json
+import os
+from main import app
+
+@pytest.fixture
+def client():
+    # Configure app for testing
+    app.config['TESTING'] = True
+    app.config['WTF_CSRF_ENABLED'] = False
+    
+    # Use an in-memory database for testing
+    with app.test_client() as test_client:
+        # Set up test database
+        setup_test_database()
+        yield test_client
+        # Clean up after test
+        teardown_test_database()
+
+def setup_test_database():
+    # Create an in-memory test database
+    conn = sqlite3.connect('test_animal_shelter.db')
+    cursor = conn.cursor()
+    
+    # Create tables
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS animals (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            name TEXT NOT NULL,
+            species TEXT NOT NULL,
+            breed TEXT,
+            age INTEGER,
+            personality TEXT,
+            image_path TEXT,
+            adoption_status TEXT DEFAULT 'Available'
+        )
+    ''')
+    
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS adopters (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            username TEXT UNIQUE NOT NULL,
+            password TEXT NOT NULL,
+            email TEXT UNIQUE,
+            join_date TEXT DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    
+    # Add test data
+    cursor.execute(
+        "INSERT INTO animals (name, species, breed, age, personality, image_path, adoption_status) VALUES (?, ?, ?, ?, ?, ?, ?)",
+        ('TestDog', 'Dog', 'Mixed', 2, 'Friendly', '/images/test.jpg', 'Available')
+    )
+    
+    conn.commit()
+    conn.close()
+    
+    # Temporarily change the database path in the app
+    app.config['DATABASE_PATH'] = 'test_animal_shelter.db'
+
+def teardown_test_database():
+    # Clean up test database
+    if os.path.exists('test_animal_shelter.db'):
+        os.remove('test_animal_shelter.db')
+
+def test_register_user(client):
+    # Test user registration
+    response = client.post('/api/register', 
+                         json={
+                             'username': 'testuser',
+                             'password': 'Password123',
+                             'email': 'test@example.com'
+                         })
+    assert response.status_code == 201
+    assert 'Registration successful' in response.get_json()['message']
+
+def test_login_user(client):
+    # First register a test user
+    client.post('/api/register', 
+               json={
+                   'username': 'testuser',
+                   'password': 'Password123',
+                   'email': 'test@example.com'
+               })
+    
+    # Test login with correct credentials
+    response = client.post('/api/login',
+                         json={
+                             'username': 'testuser',
+                             'password': 'Password123'
+                         })
+    assert response.status_code == 200
+    assert 'Login successful' in response.get_json()['message']
+    
+    # Test login with incorrect password
+    response = client.post('/api/login',
+                         json={
+                             'username': 'testuser',
+                             'password': 'WrongPassword'
+                         })
+    assert response.status_code == 401
+
+def test_get_animals(client):
+    # Test getting list of animals
+    response = client.get('/api/animals')
+    assert response.status_code == 200
+    animals = response.get_json()
+    assert len(animals) > 0
+    assert 'TestDog' in [animal['name'] for animal in animals]
+
+def test_get_animal_details(client):
+    # Test getting details of a specific animal
+    response = client.get('/api/animals/1')
+    assert response.status_code == 200
+    animal = response.get_json()
+    assert animal['name'] == 'TestDog'
+    assert animal['species'] == 'Dog'
+    assert animal['adoption_status'] == 'Available'
+
+def test_nonexistent_animal(client):
+    # Test trying to get a non-existent animal
+    response = client.get('/api/animals/999')
+    assert response.status_code == 404
\ No newline at end of file