"""FastAPI 应用入口

智能项目定价模型后端服务
遵循瑞小美系统技术栈标准
"""

from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.gzip import GZipMiddleware

from app.config import settings
from app.database import init_db, close_db
from app.routers import health, categories, materials, equipments, staff_levels, fixed_costs, projects, market, pricing, profit, dashboard
from app.middleware import (
    PerformanceMiddleware, 
    ResponseCacheMiddleware,
    RateLimitMiddleware,
    SecurityHeadersMiddleware,
)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """应用生命周期管理"""
    # 启动时初始化数据库
    await init_db()
    yield
    # 关闭时清理资源
    await close_db()


# 创建 FastAPI 应用
app = FastAPI(
    title=settings.APP_NAME,
    version=settings.APP_VERSION,
    description="智能项目定价模型 - 帮助机构精准核算成本、分析市场、智能定价",
    docs_url="/docs" if settings.DEBUG else None,
    redoc_url="/redoc" if settings.DEBUG else None,
    lifespan=lifespan,
)

# 配置 CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.CORS_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# 性能优化中间件
app.add_middleware(GZipMiddleware, minimum_size=1000)  # 压缩大于 1KB 的响应
app.add_middleware(PerformanceMiddleware)  # 性能监控
app.add_middleware(ResponseCacheMiddleware)  # 响应缓存

# 安全中间件
app.add_middleware(RateLimitMiddleware, enabled=not settings.DEBUG)  # 速率限制（生产环境）
app.add_middleware(SecurityHeadersMiddleware)  # 安全响应头

# 注册路由
app.include_router(health.router, tags=["健康检查"])
app.include_router(
    categories.router,
    prefix=f"{settings.API_V1_PREFIX}/categories",
    tags=["项目分类"]
)
app.include_router(
    materials.router,
    prefix=f"{settings.API_V1_PREFIX}/materials",
    tags=["耗材管理"]
)
app.include_router(
    equipments.router,
    prefix=f"{settings.API_V1_PREFIX}/equipments",
    tags=["设备管理"]
)
app.include_router(
    staff_levels.router,
    prefix=f"{settings.API_V1_PREFIX}/staff-levels",
    tags=["人员级别"]
)
app.include_router(
    fixed_costs.router,
    prefix=f"{settings.API_V1_PREFIX}/fixed-costs",
    tags=["固定成本"]
)
app.include_router(
    projects.router,
    prefix=f"{settings.API_V1_PREFIX}/projects",
    tags=["服务项目"]
)
app.include_router(
    market.router,
    prefix=f"{settings.API_V1_PREFIX}",
    tags=["市场行情"]
)
app.include_router(
    pricing.router,
    prefix=f"{settings.API_V1_PREFIX}",
    tags=["智能定价"]
)
app.include_router(
    profit.router,
    prefix=f"{settings.API_V1_PREFIX}",
    tags=["利润模拟"]
)
app.include_router(
    dashboard.router,
    prefix=f"{settings.API_V1_PREFIX}",
    tags=["仪表盘"]
)


@app.get("/")
async def root():
    """根路径"""
    return {
        "code": 0,
        "message": "success",
        "data": {
            "name": settings.APP_NAME,
            "version": settings.APP_VERSION,
            "docs": "/docs" if settings.DEBUG else None
        }
    }