import json
from unittest.mock import MagicMock, patch

import pytest

from openhands.core.config import LLMConfig
from openhands.events.action.message import MessageAction
from openhands.llm.llm import LLM
from openhands.resolver.github_issue import GithubIssue, ReviewThread
from openhands.resolver.issue_definitions import PRHandler


@pytest.fixture
def pr_handler():
    llm_config = LLMConfig(model='test-model')
    return PRHandler('test-owner', 'test-repo', 'test-token', llm_config)


@pytest.fixture
def mock_llm_success_response():
    return MagicMock(
        choices=[
            MagicMock(
                message=MagicMock(
                    content="""--- success
true

--- explanation
The changes look good"""
                )
            )
        ]
    )


def test_guess_success_review_threads_litellm_call():
    """Test that the completion() call for review threads contains the expected content."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create a mock issue with review threads
    issue = GithubIssue(
        owner='test-owner',
        repo='test-repo',
        number=1,
        title='Test PR',
        body='Test Body',
        thread_comments=None,
        closing_issues=['Issue 1 description', 'Issue 2 description'],
        review_comments=None,
        review_threads=[
            ReviewThread(
                comment='Please fix the formatting\n---\nlatest feedback:\nAdd docstrings',
                files=['/src/file1.py', '/src/file2.py'],
            ),
            ReviewThread(
                comment='Add more tests\n---\nlatest feedback:\nAdd test cases',
                files=['/tests/test_file.py'],
            ),
        ],
        thread_ids=['1', '2'],
        head_branch='test-branch',
    )

    # Create mock history with a detailed response
    history = [
        MessageAction(
            content="""I have made the following changes:
1. Fixed formatting in file1.py and file2.py
2. Added docstrings to all functions
3. Added test cases in test_file.py"""
        )
    ]

    # Create mock LLM config
    llm_config = LLMConfig(model='test-model', api_key='test-key')

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
The changes successfully address the feedback."""
            )
        )
    ]

    # Test the guess_success method
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, success_list, explanation = handler.guess_success(issue, history)

        # Verify the completion() calls
        assert mock_completion.call_count == 2  # One call per review thread

        # Check first call
        first_call = mock_completion.call_args_list[0]
        first_prompt = first_call[1]['messages'][0]['content']
        assert (
            'Issue descriptions:\n'
            + json.dumps(['Issue 1 description', 'Issue 2 description'], indent=4)
            in first_prompt
        )
        assert (
            'Feedback:\nPlease fix the formatting\n---\nlatest feedback:\nAdd docstrings'
            in first_prompt
        )
        assert (
            'Files locations:\n'
            + json.dumps(['/src/file1.py', '/src/file2.py'], indent=4)
            in first_prompt
        )
        assert 'Last message from AI agent:\n' + history[0].content in first_prompt

        # Check second call
        second_call = mock_completion.call_args_list[1]
        second_prompt = second_call[1]['messages'][0]['content']
        assert (
            'Issue descriptions:\n'
            + json.dumps(['Issue 1 description', 'Issue 2 description'], indent=4)
            in second_prompt
        )
        assert (
            'Feedback:\nAdd more tests\n---\nlatest feedback:\nAdd test cases'
            in second_prompt
        )
        assert (
            'Files locations:\n' + json.dumps(['/tests/test_file.py'], indent=4)
            in second_prompt
        )
        assert 'Last message from AI agent:\n' + history[0].content in second_prompt

        assert len(json.loads(explanation)) == 2


def test_guess_success_thread_comments_litellm_call():
    """Test that the completion() call for thread comments contains the expected content."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create a mock issue with thread comments
    issue = GithubIssue(
        owner='test-owner',
        repo='test-repo',
        number=1,
        title='Test PR',
        body='Test Body',
        thread_comments=[
            'Please improve error handling',
            'Add input validation',
            'latest feedback:\nHandle edge cases',
        ],
        closing_issues=['Issue 1 description', 'Issue 2 description'],
        review_comments=None,
        thread_ids=None,
        head_branch='test-branch',
    )

    # Create mock history with a detailed response
    history = [
        MessageAction(
            content="""I have made the following changes:
1. Added try/catch blocks for error handling
2. Added input validation checks
3. Added handling for edge cases"""
        )
    ]

    # Create mock LLM config
    llm_config = LLMConfig(model='test-model', api_key='test-key')

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
The changes successfully address the feedback."""
            )
        )
    ]

    # Test the guess_success method
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, success_list, explanation = handler.guess_success(issue, history)

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert (
            'Issue descriptions:\n'
            + json.dumps(['Issue 1 description', 'Issue 2 description'], indent=4)
            in prompt
        )
        assert 'PR Thread Comments:\n' + '\n---\n'.join(issue.thread_comments) in prompt
        assert 'Last message from AI agent:\n' + history[0].content in prompt

        assert len(json.loads(explanation)) == 1


def test_check_feedback_with_llm():
    """Test the _check_feedback_with_llm helper function."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Test cases for different LLM responses
    test_cases = [
        {
            'response': '--- success\ntrue\n--- explanation\nChanges look good',
            'expected': (True, 'Changes look good'),
        },
        {
            'response': '--- success\nfalse\n--- explanation\nNot all issues fixed',
            'expected': (False, 'Not all issues fixed'),
        },
        {
            'response': 'Invalid response format',
            'expected': (
                False,
                'Failed to decode answer from LLM response: Invalid response format',
            ),
        },
        {
            'response': '--- success\ntrue\n--- explanation\nMultiline\nexplanation\nhere',
            'expected': (True, 'Multiline\nexplanation\nhere'),
        },
    ]

    for case in test_cases:
        # Mock the LLM response
        mock_response = MagicMock()
        mock_response.choices = [MagicMock(message=MagicMock(content=case['response']))]

        # Test the function
        with patch.object(LLM, 'completion', return_value=mock_response):
            success, explanation = handler._check_feedback_with_llm('test prompt')
            assert (success, explanation) == case['expected']


def test_check_review_thread_with_git_patch():
    """Test that git patch from complete_runtime is included in the prompt."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create test data
    review_thread = ReviewThread(
        comment='Please fix the formatting\n---\nlatest feedback:\nAdd docstrings',
        files=['/src/file1.py', '/src/file2.py'],
    )
    issues_context = json.dumps(
        ['Issue 1 description', 'Issue 2 description'], indent=4
    )
    last_message = 'I have fixed the formatting and added docstrings'
    git_patch = 'diff --git a/src/file1.py b/src/file1.py\n+"""Added docstring."""\n'

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
Changes look good"""
            )
        )
    ]

    # Test the function
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, explanation = handler._check_review_thread(
            review_thread, issues_context, last_message, git_patch
        )

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert 'Issue descriptions:\n' + issues_context in prompt
        assert 'Feedback:\n' + review_thread.comment in prompt
        assert (
            'Files locations:\n' + json.dumps(review_thread.files, indent=4) in prompt
        )
        assert 'Last message from AI agent:\n' + last_message in prompt
        assert 'Changes made (git patch):\n' + git_patch in prompt

        # Check result
        assert success is True
        assert explanation == 'Changes look good'


def test_check_review_thread():
    """Test the _check_review_thread helper function."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create test data
    review_thread = ReviewThread(
        comment='Please fix the formatting\n---\nlatest feedback:\nAdd docstrings',
        files=['/src/file1.py', '/src/file2.py'],
    )
    issues_context = json.dumps(
        ['Issue 1 description', 'Issue 2 description'], indent=4
    )
    last_message = 'I have fixed the formatting and added docstrings'

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
Changes look good"""
            )
        )
    ]

    # Test the function
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, explanation = handler._check_review_thread(
            review_thread, issues_context, last_message
        )

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert 'Issue descriptions:\n' + issues_context in prompt
        assert 'Feedback:\n' + review_thread.comment in prompt
        assert (
            'Files locations:\n' + json.dumps(review_thread.files, indent=4) in prompt
        )
        assert 'Last message from AI agent:\n' + last_message in prompt

        # Check result
        assert success is True
        assert explanation == 'Changes look good'


def test_check_thread_comments_with_git_patch():
    """Test that git patch from complete_runtime is included in the prompt."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create test data
    thread_comments = [
        'Please improve error handling',
        'Add input validation',
        'latest feedback:\nHandle edge cases',
    ]
    issues_context = json.dumps(
        ['Issue 1 description', 'Issue 2 description'], indent=4
    )
    last_message = 'I have added error handling and input validation'
    git_patch = 'diff --git a/src/file1.py b/src/file1.py\n+try:\n+    validate_input()\n+except ValueError:\n+    handle_error()\n'

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
Changes look good"""
            )
        )
    ]

    # Test the function
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, explanation = handler._check_thread_comments(
            thread_comments, issues_context, last_message, git_patch
        )

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert 'Issue descriptions:\n' + issues_context in prompt
        assert 'PR Thread Comments:\n' + '\n---\n'.join(thread_comments) in prompt
        assert 'Last message from AI agent:\n' + last_message in prompt
        assert 'Changes made (git patch):\n' + git_patch in prompt

        # Check result
        assert success is True
        assert explanation == 'Changes look good'


def test_check_thread_comments():
    """Test the _check_thread_comments helper function."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create test data
    thread_comments = [
        'Please improve error handling',
        'Add input validation',
        'latest feedback:\nHandle edge cases',
    ]
    issues_context = json.dumps(
        ['Issue 1 description', 'Issue 2 description'], indent=4
    )
    last_message = 'I have added error handling and input validation'

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
Changes look good"""
            )
        )
    ]

    # Test the function
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, explanation = handler._check_thread_comments(
            thread_comments, issues_context, last_message
        )

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert 'Issue descriptions:\n' + issues_context in prompt
        assert 'PR Thread Comments:\n' + '\n---\n'.join(thread_comments) in prompt
        assert 'Last message from AI agent:\n' + last_message in prompt

        # Check result
        assert success is True
        assert explanation == 'Changes look good'


def test_check_review_comments_with_git_patch():
    """Test that git patch from complete_runtime is included in the prompt."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create test data
    review_comments = [
        'Please fix the code style',
        'Add more test cases',
        'latest feedback:\nImprove documentation',
    ]
    issues_context = json.dumps(
        ['Issue 1 description', 'Issue 2 description'], indent=4
    )
    last_message = 'I have fixed the code style and added tests'
    git_patch = 'diff --git a/src/file1.py b/src/file1.py\n+"""This module does X."""\n+def func():\n+    """Do Y."""\n'

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
Changes look good"""
            )
        )
    ]

    # Test the function
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, explanation = handler._check_review_comments(
            review_comments, issues_context, last_message, git_patch
        )

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert 'Issue descriptions:\n' + issues_context in prompt
        assert 'PR Review Comments:\n' + '\n---\n'.join(review_comments) in prompt
        assert 'Last message from AI agent:\n' + last_message in prompt
        assert 'Changes made (git patch):\n' + git_patch in prompt

        # Check result
        assert success is True
        assert explanation == 'Changes look good'


def test_check_review_comments():
    """Test the _check_review_comments helper function."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create test data
    review_comments = [
        'Please improve code readability',
        'Add comments to complex functions',
        'Follow PEP 8 style guide',
    ]
    issues_context = json.dumps(
        ['Issue 1 description', 'Issue 2 description'], indent=4
    )
    last_message = 'I have improved code readability and added comments'

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
Changes look good"""
            )
        )
    ]

    # Test the function
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, explanation = handler._check_review_comments(
            review_comments, issues_context, last_message
        )

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert 'Issue descriptions:\n' + issues_context in prompt
        assert 'PR Review Comments:\n' + '\n---\n'.join(review_comments) in prompt
        assert 'Last message from AI agent:\n' + last_message in prompt

        # Check result
        assert success is True
        assert explanation == 'Changes look good'


def test_guess_success_review_comments_litellm_call():
    """Test that the completion() call for review comments contains the expected content."""
    # Create a PR handler instance
    llm_config = LLMConfig(model='test', api_key='test')
    handler = PRHandler('test-owner', 'test-repo', 'test-token', llm_config)

    # Create a mock issue with review comments
    issue = GithubIssue(
        owner='test-owner',
        repo='test-repo',
        number=1,
        title='Test PR',
        body='Test Body',
        thread_comments=None,
        closing_issues=['Issue 1 description', 'Issue 2 description'],
        review_comments=[
            'Please improve code readability',
            'Add comments to complex functions',
            'Follow PEP 8 style guide',
        ],
        thread_ids=None,
        head_branch='test-branch',
    )

    # Create mock history with a detailed response
    history = [
        MessageAction(
            content="""I have made the following changes:
1. Improved code readability by breaking down complex functions
2. Added detailed comments to all complex functions
3. Fixed code style to follow PEP 8"""
        )
    ]

    # Mock the LLM response
    mock_response = MagicMock()
    mock_response.choices = [
        MagicMock(
            message=MagicMock(
                content="""--- success
true

--- explanation
The changes successfully address the feedback."""
            )
        )
    ]

    # Test the guess_success method
    with patch.object(LLM, 'completion') as mock_completion:
        mock_completion.return_value = mock_response
        success, success_list, explanation = handler.guess_success(issue, history)

        # Verify the completion() call
        mock_completion.assert_called_once()
        call_args = mock_completion.call_args
        prompt = call_args[1]['messages'][0]['content']

        # Check prompt content
        assert (
            'Issue descriptions:\n'
            + json.dumps(['Issue 1 description', 'Issue 2 description'], indent=4)
            in prompt
        )
        assert 'PR Review Comments:\n' + '\n---\n'.join(issue.review_comments) in prompt
        assert 'Last message from AI agent:\n' + history[0].content in prompt

        assert len(json.loads(explanation)) == 1