"""
Comprehensive hook tracking API endpoints.
"""

import json
from datetime import datetime
from typing import List, Optional, Dict, Any
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, func, desc, and_
from sqlalchemy.orm import selectinload
from pydantic import BaseModel, Field

from app.database.connection import get_db
from app.models.session import Session
from app.models.hooks import (
    HookEvent, ToolError, WaitingPeriodNew, PerformanceMetric,
    CodeQualityEvent, WorkflowEvent, LearningEvent,
    EnvironmentEvent, CollaborationEvent, ProjectIntelligence
)

router = APIRouter()


# Request/Response Models
class BaseHookRequest(BaseModel):
    """Base request schema for hook events."""
    session_id: Optional[str] = Field(None, description="Session ID (auto-detected if not provided)")
    timestamp: Optional[datetime] = Field(None, description="Event timestamp")


class ToolErrorRequest(BaseHookRequest):
    """Request schema for tool error events."""
    tool_name: str
    error_type: str
    error_message: str
    stack_trace: Optional[str] = None
    parameters: Optional[dict] = None


class WaitingPeriodRequest(BaseHookRequest):
    """Request schema for waiting period events."""
    reason: Optional[str] = Field("thinking", description="Reason for waiting")
    context: Optional[str] = None
    duration_ms: Optional[int] = None
    end_time: Optional[datetime] = None


class PerformanceMetricRequest(BaseHookRequest):
    """Request schema for performance metrics."""
    metric_type: str = Field(..., description="Type of metric: memory, cpu, disk")
    value: float
    unit: str = Field(..., description="Unit: MB, %, seconds, etc.")
    threshold_exceeded: bool = False


class CodeQualityRequest(BaseHookRequest):
    """Request schema for code quality events."""
    event_type: str = Field(..., description="lint, format, test, build, analysis")
    file_path: Optional[str] = None
    tool_name: Optional[str] = None
    status: str = Field(..., description="success, warning, error")
    issues_count: int = 0
    details: Optional[dict] = None
    duration_ms: Optional[int] = None


class WorkflowRequest(BaseHookRequest):
    """Request schema for workflow events."""
    event_type: str = Field(..., description="context_switch, search_query, browser_tab, etc.")
    description: Optional[str] = None
    metadata: Optional[dict] = None
    source: Optional[str] = None
    duration_ms: Optional[int] = None


class LearningRequest(BaseHookRequest):
    """Request schema for learning events."""
    event_type: str = Field(..., description="tutorial, documentation, experimentation")
    topic: Optional[str] = None
    resource_url: Optional[str] = None
    confidence_before: Optional[int] = Field(None, ge=1, le=10)
    confidence_after: Optional[int] = Field(None, ge=1, le=10)
    notes: Optional[str] = None
    duration_ms: Optional[int] = None


class EnvironmentRequest(BaseHookRequest):
    """Request schema for environment events."""
    event_type: str = Field(..., description="env_change, config_update, security_scan")
    environment: Optional[str] = None
    config_file: Optional[str] = None
    changes: Optional[dict] = None
    impact_level: Optional[str] = Field(None, description="low, medium, high, critical")


class CollaborationRequest(BaseHookRequest):
    """Request schema for collaboration events."""
    event_type: str = Field(..., description="external_resource, ai_question, review_request")
    interaction_type: Optional[str] = None
    query_or_topic: Optional[str] = None
    resource_url: Optional[str] = None
    response_quality: Optional[int] = Field(None, ge=1, le=5)
    time_to_resolution: Optional[int] = None
    metadata: Optional[dict] = None


class ProjectIntelligenceRequest(BaseHookRequest):
    """Request schema for project intelligence events."""
    event_type: str = Field(..., description="refactor, feature_flag, debugging_session")
    scope: Optional[str] = Field(None, description="small, medium, large")
    complexity: Optional[str] = Field(None, description="low, medium, high")
    end_time: Optional[datetime] = None
    duration_minutes: Optional[int] = None
    files_affected: Optional[List[str]] = None
    outcome: Optional[str] = Field(None, description="success, partial, failed, abandoned")
    notes: Optional[str] = None


class HookResponse(BaseModel):
    """Response schema for hook operations."""
    id: int
    hook_type: str
    session_id: str
    timestamp: datetime
    message: str


async def get_current_session_id() -> Optional[str]:
    """Get the current session ID from the temporary file."""
    try:
        with open("/tmp/claude-session-id", "r") as f:
            return f.read().strip()
    except (OSError, FileNotFoundError):
        return None


async def validate_session(session_id: str, db: AsyncSession) -> Session:
    """Validate that the session exists."""
    result = await db.execute(
        select(Session).where(Session.id == int(session_id))
    )
    session = result.scalars().first()
    
    if not session:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Session {session_id} not found"
        )
    
    return session


# Tool Error Endpoints
@router.post("/hooks/tool-error", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_tool_error(
    request: ToolErrorRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a tool error event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        tool_error = ToolError(
            session_id=session_id,
            tool_name=request.tool_name,
            error_type=request.error_type,
            error_message=request.error_message,
            stack_trace=request.stack_trace,
            parameters=request.parameters,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(tool_error)
        await db.commit()
        await db.refresh(tool_error)
        
        return HookResponse(
            id=tool_error.id,
            hook_type="tool_error",
            session_id=session_id,
            timestamp=tool_error.timestamp,
            message=f"Tool error recorded for {request.tool_name}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record tool error: {str(e)}")


# Waiting Period Endpoints
@router.post("/hooks/waiting-period", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_waiting_period(
    request: WaitingPeriodRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a waiting period event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        waiting_period = WaitingPeriodNew(
            session_id=session_id,
            reason=request.reason,
            context=request.context,
            duration_ms=request.duration_ms,
            end_time=request.end_time,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(waiting_period)
        await db.commit()
        await db.refresh(waiting_period)
        
        return HookResponse(
            id=waiting_period.id,
            hook_type="waiting_period",
            session_id=session_id,
            timestamp=waiting_period.start_time,
            message=f"Waiting period recorded: {request.reason}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record waiting period: {str(e)}")


# Performance Metric Endpoints
@router.post("/hooks/performance", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_performance_metric(
    request: PerformanceMetricRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a performance metric."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        metric = PerformanceMetric(
            session_id=session_id,
            metric_type=request.metric_type,
            value=request.value,
            unit=request.unit,
            threshold_exceeded=request.threshold_exceeded,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(metric)
        await db.commit()
        await db.refresh(metric)
        
        return HookResponse(
            id=metric.id,
            hook_type="performance_metric",
            session_id=session_id,
            timestamp=metric.timestamp,
            message=f"Performance metric recorded: {request.metric_type} = {request.value}{request.unit}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record performance metric: {str(e)}")


# Code Quality Endpoints
@router.post("/hooks/code-quality", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_code_quality_event(
    request: CodeQualityRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a code quality event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        event = CodeQualityEvent(
            session_id=session_id,
            event_type=request.event_type,
            file_path=request.file_path,
            tool_name=request.tool_name,
            status=request.status,
            issues_count=request.issues_count,
            details=request.details,
            duration_ms=request.duration_ms,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(event)
        await db.commit()
        await db.refresh(event)
        
        return HookResponse(
            id=event.id,
            hook_type="code_quality",
            session_id=session_id,
            timestamp=event.timestamp,
            message=f"Code quality event recorded: {request.event_type} - {request.status}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record code quality event: {str(e)}")


# Workflow Endpoints
@router.post("/hooks/workflow", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_workflow_event(
    request: WorkflowRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a workflow event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        event = WorkflowEvent(
            session_id=session_id,
            event_type=request.event_type,
            description=request.description,
            event_metadata=request.metadata,
            source=request.source,
            duration_ms=request.duration_ms,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(event)
        await db.commit()
        await db.refresh(event)
        
        return HookResponse(
            id=event.id,
            hook_type="workflow",
            session_id=session_id,
            timestamp=event.timestamp,
            message=f"Workflow event recorded: {request.event_type}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record workflow event: {str(e)}")


# Learning Endpoints
@router.post("/hooks/learning", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_learning_event(
    request: LearningRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a learning event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        event = LearningEvent(
            session_id=session_id,
            event_type=request.event_type,
            topic=request.topic,
            resource_url=request.resource_url,
            confidence_before=request.confidence_before,
            confidence_after=request.confidence_after,
            notes=request.notes,
            duration_ms=request.duration_ms,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(event)
        await db.commit()
        await db.refresh(event)
        
        return HookResponse(
            id=event.id,
            hook_type="learning",
            session_id=session_id,
            timestamp=event.timestamp,
            message=f"Learning event recorded: {request.event_type} - {request.topic or 'General'}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record learning event: {str(e)}")


# Environment Endpoints
@router.post("/hooks/environment", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_environment_event(
    request: EnvironmentRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record an environment event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        event = EnvironmentEvent(
            session_id=session_id,
            event_type=request.event_type,
            environment=request.environment,
            config_file=request.config_file,
            changes=request.changes,
            impact_level=request.impact_level,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(event)
        await db.commit()
        await db.refresh(event)
        
        return HookResponse(
            id=event.id,
            hook_type="environment",
            session_id=session_id,
            timestamp=event.timestamp,
            message=f"Environment event recorded: {request.event_type}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record environment event: {str(e)}")


# Collaboration Endpoints
@router.post("/hooks/collaboration", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_collaboration_event(
    request: CollaborationRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a collaboration event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        event = CollaborationEvent(
            session_id=session_id,
            event_type=request.event_type,
            interaction_type=request.interaction_type,
            query_or_topic=request.query_or_topic,
            resource_url=request.resource_url,
            response_quality=request.response_quality,
            time_to_resolution=request.time_to_resolution,
            event_metadata=request.metadata,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(event)
        await db.commit()
        await db.refresh(event)
        
        return HookResponse(
            id=event.id,
            hook_type="collaboration",
            session_id=session_id,
            timestamp=event.timestamp,
            message=f"Collaboration event recorded: {request.event_type}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record collaboration event: {str(e)}")


# Project Intelligence Endpoints
@router.post("/hooks/project-intelligence", response_model=HookResponse, status_code=status.HTTP_201_CREATED)
async def record_project_intelligence(
    request: ProjectIntelligenceRequest,
    db: AsyncSession = Depends(get_db)
):
    """Record a project intelligence event."""
    try:
        session_id = request.session_id or await get_current_session_id()
        if not session_id:
            raise HTTPException(status_code=400, detail="No active session found")
        
        await validate_session(session_id, db)
        
        event = ProjectIntelligence(
            session_id=session_id,
            event_type=request.event_type,
            scope=request.scope,
            complexity=request.complexity,
            end_time=request.end_time,
            duration_minutes=request.duration_minutes,
            files_affected=request.files_affected,
            outcome=request.outcome,
            notes=request.notes,
            timestamp=request.timestamp or datetime.utcnow()
        )
        
        db.add(event)
        await db.commit()
        await db.refresh(event)
        
        return HookResponse(
            id=event.id,
            hook_type="project_intelligence",
            session_id=session_id,
            timestamp=event.timestamp,
            message=f"Project intelligence recorded: {request.event_type}"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to record project intelligence: {str(e)}")


# Analytics Endpoints
@router.get("/hooks/analytics/summary", response_model=Dict[str, Any])
async def get_hook_analytics_summary(
    project_id: Optional[int] = None,
    start_date: Optional[datetime] = None,
    end_date: Optional[datetime] = None,
    db: AsyncSession = Depends(get_db)
):
    """Get comprehensive analytics summary across all hook types."""
    try:
        # Base filters
        filters = []
        if start_date:
            filters.append(ToolError.timestamp >= start_date)
        if end_date:
            filters.append(ToolError.timestamp <= end_date)
        
        if project_id:
            filters.append(Session.project_id == project_id)
        
        # Get counts for each hook type
        summary = {}
        
        # Tool errors
        query = select(func.count(ToolError.id))
        if project_id:
            query = query.join(Session)
        if filters:
            query = query.where(and_(*filters))
        
        result = await db.execute(query)
        summary["tool_errors"] = result.scalar()
        
        # Add similar queries for other hook types...
        # (Similar pattern for each hook type)
        
        return summary
        
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to get analytics summary: {str(e)}")


@router.get("/hooks/session/{session_id}/timeline", response_model=List[Dict[str, Any]])
async def get_session_timeline(
    session_id: str,
    db: AsyncSession = Depends(get_db)
):
    """Get a comprehensive timeline of all events in a session."""
    try:
        await validate_session(session_id, db)
        
        # Collect all events from different tables
        timeline = []
        
        # Tool errors
        result = await db.execute(
            select(ToolError).where(ToolError.session_id == session_id)
        )
        for event in result.scalars().all():
            timeline.append({
                "type": "tool_error",
                "timestamp": event.timestamp,
                "data": {
                    "tool_name": event.tool_name,
                    "error_type": event.error_type,
                    "error_message": event.error_message
                }
            })
        
        # Add other event types to timeline...
        # (Similar pattern for each event type)
        
        # Sort by timestamp
        timeline.sort(key=lambda x: x["timestamp"])
        
        return timeline
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to get session timeline: {str(e)}")