# src/api/routes.py
"""
API routes for the self-improving code generator
"""

import logging
import uuid
from datetime import datetime
from typing import Optional
from fastapi import APIRouter, HTTPException, BackgroundTasks
from pydantic import BaseModel

logger = logging.getLogger(__name__)
router = APIRouter()

# Request/Response models
class AnalyzeRequest(BaseModel):
    project_id: str
    project_path: str
    user_id: Optional[str] = None
    target_quality: float = 0.85
    max_iterations: int = 5

class AnalyzeResponse(BaseModel):
    success: bool
    project_id: str
    status: str
    message: str
    progress_url: str
    estimated_time: str

class ProgressResponse(BaseModel):
    project_id: str
    status: str
    current_iteration: int
    max_iterations: int
    current_quality: float
    target_quality: float
    improvements_applied: int
    estimated_completion: str

@router.post("/analyze-and-improve", response_model=AnalyzeResponse)
async def analyze_and_improve_project(
    request: AnalyzeRequest,
    background_tasks: BackgroundTasks
):
    """
    Analyze project and apply progressive improvements
    
    Progressive Enhancement:
    - Level 1 (Critical): Auto-applied immediately
    - Level 2 (Core): Auto-suggested with preview
    - Level 3 (Advanced): Available on-demand
    """
    
    try:
        # Start background improvement process
        background_tasks.add_task(
            run_improvement_process,
            request.project_id,
            request.project_path,
            request.user_id,
            request.target_quality,
            request.max_iterations
        )
        
        return AnalyzeResponse(
            success=True,
            project_id=request.project_id,
            status="improvement_started",
            message="Project analysis and improvement started in background",
            progress_url=f"/api/v1/project/{request.project_id}/improvement-progress",
            estimated_time="2-5 minutes"
        )
        
    except Exception as e:
        logger.error(f"Failed to start improvement process: {e}")
        raise HTTPException(status_code=500, detail=str(e))

async def run_improvement_process(
    project_id: str,
    project_path: str,
    user_id: Optional[str],
    target_quality: float,
    max_iterations: int
):
    """Background task for running improvement process"""
    try:
        logger.info(f"Starting improvement process for project {project_id}")
        
        # For now, simulate the process
        # In full implementation, this would call the actual generator
        
        # Simulate processing time
        import asyncio
        await asyncio.sleep(5)
        
        logger.info(f"Improvement process completed for project {project_id}")
        
    except Exception as e:
        logger.error(f"Improvement process failed for project {project_id}: {e}")

@router.get("/project/{project_id}/improvement-progress", response_model=ProgressResponse)
async def get_improvement_progress(project_id: str):
    """Get real-time progress of improvement process"""
    
    # This would fetch from database in full implementation
    return ProgressResponse(
        project_id=project_id,
        status="in_progress",
        current_iteration=2,
        max_iterations=5,
        current_quality=0.67,
        target_quality=0.85,
        improvements_applied=8,
        estimated_completion="2 minutes"
    )

@router.get("/project/{project_id}/improvement-results")
async def get_improvement_results(project_id: str):
    """Get final improvement results"""
    
    # This would fetch from database in full implementation
    return {
        "project_id": project_id,
        "status": "completed",
        "initial_quality": 0.35,
        "final_quality": 0.87,
        "target_achieved": True,
        "iterations_completed": 3,
        "improvements_applied": 12,
        "technology_stack": "nodejs_react",
        "improvement_summary": {
            "critical_fixes": 4,
            "core_enhancements": 6,
            "advanced_optimizations": 2
        }
    }

@router.post("/project/{project_id}/apply-suggestion")
async def apply_improvement_suggestion(
    project_id: str,
    improvement_id: str,
    user_id: Optional[str] = None
):
    """Apply specific improvement suggestion"""
    
    return {
        "success": True,
        "improvement_id": improvement_id,
        "status": "applied",
        "files_modified": ["src/components/ErrorBoundary.jsx", "src/utils/errorHandler.js"]
    }

@router.get("/project/{project_id}/suggestions")
async def get_remaining_suggestions(
    project_id: str,
    level: Optional[str] = None,
    category: Optional[str] = None
):
    """Get remaining improvement suggestions"""
    
    return {
        "project_id": project_id,
        "suggestions": [
            {
                "id": "perf_001",
                "level": "advanced", 
                "category": "performance",
                "title": "Add Redis caching layer",
                "description": "Implement Redis caching for API responses",
                "impact": "Medium",
                "effort": "Medium",
                "files_affected": ["src/services/cache.js", "src/middleware/cache.js"],
                "preview_available": True
            }
        ]
    }
