"""
Tests for Claude Code hook simulation and integration.
"""

import pytest
import json
import subprocess
from unittest.mock import patch, MagicMock
from httpx import AsyncClient

from tests.fixtures import TestDataFactory


class TestHookSimulation:
    """Test hook payload generation and API integration."""
    
    def test_session_start_hook_payload(self):
        """Test generating SessionStart hook payload."""
        # Simulate environment variables that would be set by Claude Code
        mock_env = {
            "PWD": "/home/user/test-project",
            "USER": "testuser"
        }
        
        with patch.dict("os.environ", mock_env):
            with patch("subprocess.check_output") as mock_git:
                # Mock git commands
                mock_git.side_effect = [
                    b"main\n",  # git branch --show-current
                    b"https://github.com/user/test-project.git\n"  # git config --get remote.origin.url
                ]
                
                payload = {
                    "session_type": "startup",
                    "working_directory": mock_env["PWD"],
                    "git_branch": "main",
                    "git_repo": "https://github.com/user/test-project.git",
                    "environment": {
                        "pwd": mock_env["PWD"],
                        "user": mock_env["USER"],
                        "timestamp": "2024-01-01T12:00:00Z"
                    }
                }
                
                # Verify payload structure matches API expectations
                assert "session_type" in payload
                assert "working_directory" in payload
                assert payload["session_type"] in ["startup", "resume", "clear"]
                
    def test_user_prompt_hook_payload(self):
        """Test generating UserPromptSubmit hook payload."""
        mock_prompt = "How do I implement user authentication?"
        mock_session_id = "123"
        
        payload = {
            "session_id": int(mock_session_id),
            "timestamp": "2024-01-01T12:00:00Z",
            "user_prompt": mock_prompt,
            "exchange_type": "user_prompt"
        }
        
        assert payload["session_id"] == 123
        assert payload["user_prompt"] == mock_prompt
        assert payload["exchange_type"] == "user_prompt"
        
    def test_post_tool_use_edit_payload(self):
        """Test generating PostToolUse Edit hook payload."""
        mock_file_path = "/home/user/test-project/main.py"
        mock_session_id = "123"
        
        payload = {
            "session_id": int(mock_session_id),
            "tool_name": "Edit",
            "action": "file_edit",
            "file_path": mock_file_path,
            "timestamp": "2024-01-01T12:00:00Z",
            "metadata": {"success": True},
            "success": True
        }
        
        assert payload["tool_name"] == "Edit"
        assert payload["file_path"] == mock_file_path
        assert payload["success"] is True
        
    def test_post_tool_use_bash_payload(self):
        """Test generating PostToolUse Bash hook payload."""
        mock_command = "pytest --cov=app"
        mock_session_id = "123"
        
        payload = {
            "session_id": int(mock_session_id),
            "tool_name": "Bash",
            "action": "command_execution",
            "timestamp": "2024-01-01T12:00:00Z",
            "metadata": {
                "command": mock_command,
                "success": True
            },
            "success": True
        }
        
        assert payload["tool_name"] == "Bash"
        assert payload["metadata"]["command"] == mock_command
        
    def test_notification_hook_payload(self):
        """Test generating Notification hook payload."""
        mock_session_id = "123"
        
        payload = {
            "session_id": int(mock_session_id),
            "timestamp": "2024-01-01T12:00:00Z",
            "context_before": "Claude is waiting for input"
        }
        
        assert payload["session_id"] == 123
        assert "context_before" in payload
        
    def test_stop_hook_payload(self):
        """Test generating Stop hook payload."""
        mock_session_id = "123"
        
        payload = {
            "session_id": int(mock_session_id),
            "timestamp": "2024-01-01T12:00:00Z",
            "claude_response": "Response completed",
            "exchange_type": "claude_response"
        }
        
        assert payload["exchange_type"] == "claude_response"
        
    def test_json_escaping_in_payloads(self):
        """Test that special characters in payloads are properly escaped."""
        # Test prompt with quotes and newlines
        problematic_prompt = 'How do I handle "quotes" and\nnewlines in JSON?'
        
        payload = {
            "session_id": 1,
            "user_prompt": problematic_prompt,
            "exchange_type": "user_prompt"
        }
        
        # Should be able to serialize to JSON without errors
        json_str = json.dumps(payload)
        parsed = json.loads(json_str)
        
        assert parsed["user_prompt"] == problematic_prompt
        
    def test_file_path_escaping(self):
        """Test that file paths with spaces are handled correctly."""
        file_path_with_spaces = "/home/user/My Projects/test project/main.py"
        
        payload = {
            "session_id": 1,
            "tool_name": "Edit",
            "file_path": file_path_with_spaces
        }
        
        json_str = json.dumps(payload)
        parsed = json.loads(json_str)
        
        assert parsed["file_path"] == file_path_with_spaces


class TestHookIntegration:
    """Test actual hook integration with the API."""
    
    @pytest.mark.hooks
    async def test_session_start_hook_integration(self, test_client: AsyncClient):
        """Test complete SessionStart hook workflow."""
        # Simulate the payload that would be sent by the hook
        hook_payload = TestDataFactory.create_session_data(
            session_type="startup",
            working_directory="/home/user/hook-test",
            git_branch="main",
            git_repo="https://github.com/user/hook-test.git"
        )
        
        response = await test_client.post("/api/session/start", json=hook_payload)
        
        assert response.status_code == 201
        data = response.json()
        assert "session_id" in data
        assert "project_id" in data
        
        # Store session ID for subsequent hook calls
        return data["session_id"]
        
    @pytest.mark.hooks
    async def test_user_prompt_hook_integration(self, test_client: AsyncClient):
        """Test UserPromptSubmit hook integration."""
        # First create a session
        session_id = await self.test_session_start_hook_integration(test_client)
        
        # Simulate user prompt hook
        hook_payload = {
            "session_id": session_id,
            "timestamp": "2024-01-01T12:00:00Z",
            "user_prompt": "This prompt came from a hook",
            "exchange_type": "user_prompt"
        }
        
        response = await test_client.post("/api/conversation", json=hook_payload)
        
        assert response.status_code == 201
        
    @pytest.mark.hooks
    async def test_post_tool_use_hook_integration(self, test_client: AsyncClient):
        """Test PostToolUse hook integration."""
        session_id = await self.test_session_start_hook_integration(test_client)
        
        # Simulate Edit tool hook
        hook_payload = {
            "session_id": session_id,
            "tool_name": "Edit",
            "action": "file_edit",
            "file_path": "/home/user/hook-test/main.py",
            "timestamp": "2024-01-01T12:01:00Z",
            "metadata": {"lines_changed": 5},
            "success": True,
            "lines_added": 3,
            "lines_removed": 2
        }
        
        response = await test_client.post("/api/activity", json=hook_payload)
        
        assert response.status_code == 201
        
    @pytest.mark.hooks
    async def test_waiting_period_hook_integration(self, test_client: AsyncClient):
        """Test Notification and waiting period hooks."""
        session_id = await self.test_session_start_hook_integration(test_client)
        
        # Start waiting period
        start_payload = {
            "session_id": session_id,
            "timestamp": "2024-01-01T12:00:00Z",
            "context_before": "Claude finished responding"
        }
        
        start_response = await test_client.post("/api/waiting/start", json=start_payload)
        assert start_response.status_code == 201
        
        # End waiting period
        end_payload = {
            "session_id": session_id,
            "timestamp": "2024-01-01T12:05:00Z",
            "duration_seconds": 300,
            "context_after": "User submitted new prompt"
        }
        
        end_response = await test_client.post("/api/waiting/end", json=end_payload)
        assert end_response.status_code == 200
        
    @pytest.mark.hooks
    async def test_stop_hook_integration(self, test_client: AsyncClient):
        """Test Stop hook integration."""
        session_id = await self.test_session_start_hook_integration(test_client)
        
        # Simulate Stop hook (Claude response)
        hook_payload = {
            "session_id": session_id,
            "timestamp": "2024-01-01T12:10:00Z",
            "claude_response": "Here's the implementation you requested...",
            "tools_used": ["Edit", "Write"],
            "files_affected": ["main.py", "utils.py"],
            "exchange_type": "claude_response"
        }
        
        response = await test_client.post("/api/conversation", json=hook_payload)
        
        assert response.status_code == 201
        
    @pytest.mark.hooks
    async def test_git_hook_integration(self, test_client: AsyncClient):
        """Test git operation hook integration."""
        session_id = await self.test_session_start_hook_integration(test_client)
        
        hook_payload = TestDataFactory.create_git_operation_data(
            session_id=session_id,
            operation="commit",
            command="git commit -m 'Test commit from hook'",
            files_changed=["main.py"],
            lines_added=10,
            lines_removed=2
        )
        
        response = await test_client.post("/api/git", json=hook_payload)
        
        assert response.status_code == 201


class TestHookEnvironment:
    """Test hook environment and configuration."""
    
    def test_session_id_persistence(self):
        """Test session ID storage and retrieval mechanism."""
        session_file = "/tmp/claude-session-id"
        test_session_id = "12345"
        
        # Simulate writing session ID to file (as hooks would do)
        with open(session_file, "w") as f:
            f.write(test_session_id)
            
        # Simulate reading session ID from file (as subsequent hooks would do)
        with open(session_file, "r") as f:
            retrieved_id = f.read().strip()
            
        assert retrieved_id == test_session_id
        
        # Clean up
        import os
        if os.path.exists(session_file):
            os.remove(session_file)
            
    def test_git_environment_detection(self):
        """Test git repository detection logic."""
        with patch("subprocess.check_output") as mock_subprocess:
            # Mock successful git commands
            mock_subprocess.side_effect = [
                b"main\n",  # git branch --show-current
                b"https://github.com/user/repo.git\n"  # git config --get remote.origin.url
            ]
            
            # Simulate what hooks would do
            try:
                branch = subprocess.check_output(
                    ["git", "branch", "--show-current"],
                    stderr=subprocess.DEVNULL,
                    text=True
                ).strip()
                
                repo = subprocess.check_output(
                    ["git", "config", "--get", "remote.origin.url"],
                    stderr=subprocess.DEVNULL,
                    text=True
                ).strip()
                
                assert branch == "main"
                assert repo == "https://github.com/user/repo.git"
                
            except subprocess.CalledProcessError:
                # If git commands fail, hooks should handle gracefully
                branch = "unknown"
                repo = "null"
                
        # Test non-git directory handling
        with patch("subprocess.check_output", side_effect=subprocess.CalledProcessError(128, "git")):
            try:
                branch = subprocess.check_output(
                    ["git", "branch", "--show-current"],
                    stderr=subprocess.DEVNULL,
                    text=True
                ).strip()
            except subprocess.CalledProcessError:
                branch = "unknown"
                
            assert branch == "unknown"
            
    def test_hook_error_handling(self):
        """Test hook error handling and graceful failures."""
        # Test network failure (API unreachable)
        import requests
        from unittest.mock import patch
        
        with patch("requests.post", side_effect=requests.exceptions.ConnectionError("Connection refused")):
            # Hooks should not crash if API is unreachable
            # This would be handled by curl in the actual hooks with > /dev/null 2>&1
            try:
                # Simulate what would happen in a hook
                response = requests.post("http://localhost:8000/api/session/start", json={})
                assert False, "Should have raised ConnectionError"
            except requests.exceptions.ConnectionError:
                # This is expected - hook should handle gracefully
                pass
                
    def test_hook_command_construction(self):
        """Test building hook commands with proper escaping."""
        # Test session start hook command construction
        session_data = {
            "session_type": "startup",
            "working_directory": "/home/user/test project",  # Space in path
            "git_branch": "feature/new-feature",
            "environment": {"user": "testuser"}
        }
        
        # Construct JSON payload like the hook would
        json_payload = json.dumps(session_data)
        
        # Verify it can be parsed back
        parsed = json.loads(json_payload)
        assert parsed["working_directory"] == "/home/user/test project"
        
    def test_hook_timing_and_ordering(self):
        """Test that hook timing and ordering work correctly."""
        # Simulate rapid-fire hook calls (as would happen during active development)
        timestamps = [
            "2024-01-01T12:00:00Z",  # Session start
            "2024-01-01T12:00:01Z",  # User prompt
            "2024-01-01T12:00:02Z",  # Waiting start
            "2024-01-01T12:00:05Z",  # Tool use (Edit)
            "2024-01-01T12:00:06Z",  # Tool use (Write)
            "2024-01-01T12:00:10Z",  # Waiting end
            "2024-01-01T12:00:11Z",  # Claude response
        ]
        
        # Verify timestamps are in chronological order
        for i in range(1, len(timestamps)):
            assert timestamps[i] > timestamps[i-1]


class TestHookConfiguration:
    """Test hook configuration validation and setup."""
    
    def test_hook_config_validation(self):
        """Test validation of hook configuration JSON."""
        # Load and validate the provided hook configuration
        with open("config/claude-hooks.json", "r") as f:
            config = json.load(f)
            
        # Verify required hook types are present
        required_hooks = ["SessionStart", "UserPromptSubmit", "PostToolUse", "Notification", "Stop"]
        for hook_type in required_hooks:
            assert hook_type in config["hooks"]
            
        # Verify SessionStart has all session types
        session_start_hooks = config["hooks"]["SessionStart"]
        matchers = [hook.get("matcher") for hook in session_start_hooks if "matcher" in hook]
        assert "startup" in matchers
        assert "resume" in matchers
        assert "clear" in matchers
        
        # Verify PostToolUse has main tools
        post_tool_hooks = config["hooks"]["PostToolUse"]
        tool_matchers = [hook.get("matcher") for hook in post_tool_hooks if "matcher" in hook]
        assert "Edit" in tool_matchers
        assert "Write" in tool_matchers
        assert "Read" in tool_matchers
        assert "Bash" in tool_matchers
        
    def test_hook_command_structure(self):
        """Test that hook commands have proper structure."""
        with open("config/claude-hooks.json", "r") as f:
            config = json.load(f)
            
        for hook_type, hooks in config["hooks"].items():
            for hook in hooks:
                assert "command" in hook
                command = hook["command"]
                
                # All commands should make HTTP requests to localhost:8000
                assert "http://localhost:8000" in command
                assert "curl" in command
                
                # Commands should run in background and suppress output
                assert "> /dev/null 2>&1 &" in command
                
    def test_session_id_handling_in_config(self):
        """Test that hook configuration properly handles session ID."""
        with open("config/claude-hooks.json", "r") as f:
            config = json.load(f)
            
        # Non-SessionStart hooks should use session ID from temp file
        for hook_type, hooks in config["hooks"].items():
            if hook_type != "SessionStart":
                for hook in hooks:
                    command = hook["command"]
                    # Should reference the session ID temp file
                    assert "CLAUDE_SESSION_FILE" in command
                    assert "/tmp/claude-session-id" in command