from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse
from app.models import init_db
from app.routers import auth, etl, match, dashboard, report, lab
from app.config import STATIC_DIR, DEBUG, CORS_ORIGINS, APP_HOST, APP_PORT

# 初始化資料庫
init_db()

app = FastAPI(
    title="SalesPipeline API",
    description="銷售管線管理系統 API",
    version="1.0.0",
    docs_url="/api/docs" if DEBUG else None,
    redoc_url="/api/redoc" if DEBUG else None,
)

# CORS 設定 (開發模式需要)
if DEBUG and CORS_ORIGINS:
    app.add_middleware(
        CORSMiddleware,
        allow_origins=CORS_ORIGINS,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )

# 註冊 API 路由
app.include_router(auth.router, prefix="/api")
app.include_router(etl.router, prefix="/api")
app.include_router(match.router, prefix="/api")
app.include_router(dashboard.router, prefix="/api")
app.include_router(report.router, prefix="/api")
app.include_router(lab.router, prefix="/api")

@app.get("/api/health")
def health_check():
    return {"status": "healthy", "version": "1.0.0"}

# 靜態檔案服務 (前端 build 後的檔案)
static_path = STATIC_DIR
if static_path.exists():
    assets_dir = static_path / "assets"
    if assets_dir.exists():
        app.mount("/assets", StaticFiles(directory=assets_dir), name="assets")

# SPA 路由處理 - 所有非 API 路由都返回 index.html
@app.get("/{full_path:path}")
async def serve_spa(request: Request, full_path: str):
    if full_path.startswith("api/"):
        return {"error": "Not Found"}, 404

    static_file = static_path / full_path
    if static_file.exists() and static_file.is_file():
        return FileResponse(static_file)

    index_file = static_path / "index.html"
    if index_file.exists():
        return FileResponse(index_file)

    return {
        "message": "SalesPipeline API is running",
        "docs": "/api/docs" if DEBUG else "Disabled in production",
        "health": "/api/health"
    }

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host=APP_HOST, port=APP_PORT)