"""
FastAPI 应用主入口
时间序列数据分析系统 FastAPI 版本
"""

import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.gzip import GZipMiddleware

from app.core.config import settings, setup_logging, ENVIRONMENT, DEBUG
from app.services.font_manager import setup_fonts_for_app
from app.services.linux_adapter import init_linux_environment

# 设置日志
logger = logging.getLogger(__name__)

# 应用生命周期
@asynccontextmanager
async def lifespan(app: FastAPI):
    """应用生命周期管理"""
    # 启动时
    logger.info("=" * 60)
    logger.info(f"应用启动: {settings.APP_TITLE}")
    logger.info(f"版本: {settings.APP_VERSION}")
    logger.info(f"环境: {ENVIRONMENT}")
    logger.info(f"调试: {DEBUG}")
    logger.info(f"监听: {settings.HOST}:{settings.PORT}")
    logger.info("=" * 60)
    
    # 初始化 Linux 环境
    try:
        init_linux_environment()
    except Exception as e:
        logger.warning(f"Linux 环境初始化失败: {e}")
    
    # 初始化字体
    try:
        fonts_config = setup_fonts_for_app(['zh', 'en'])
        logger.info(f"字体配置完成: {fonts_config}")
    except Exception as e:
        logger.error(f"字体配置失败: {e}")
    
    yield
    
    # 关闭时
    logger.info("应用关闭")


# 创建 FastAPI 应用
app = FastAPI(
    title=settings.APP_TITLE,
    description=settings.APP_DESCRIPTION,
    version=settings.APP_VERSION,
    lifespan=lifespan
)

# 添加中间件
# CORS 中间件
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.CORS_ORIGINS,
    allow_credentials=settings.CORS_ALLOW_CREDENTIALS,
    allow_methods=settings.CORS_ALLOW_METHODS,
    allow_headers=settings.CORS_ALLOW_HEADERS,
)

# 压缩中间件
app.add_middleware(GZipMiddleware, minimum_size=1000)

# 导入和包含路由
from app.api.routes import upload, analysis, analysis_v2, files

# v2 模式：仅暴露 v2 分析接口 + 基础状态接口
if settings.API_MODE == "v2":
    logger.info("API_MODE=v2: 禁用 v1 上传/文件接口，仅启用 /api/v2")
    app.include_router(analysis_v2.router, prefix="/api/v2", tags=["analysis-v2"])
else:
    app.include_router(upload.router, prefix="/api", tags=["upload"])
    app.include_router(analysis.router, prefix="/api", tags=["analysis"])
    app.include_router(analysis_v2.router, prefix="/api/v2", tags=["analysis-v2"])
    app.include_router(files.router, prefix="/api", tags=["files"])

# 根路由
@app.get("/")
async def root():
    """根路径"""
    return {
        "message": "Lazy Stat Backend API",
        "version": settings.APP_VERSION,
        "docs": "/docs"
    }

@app.get("/health")
async def health():
    """健康检查"""
    return {
        "status": "healthy",
        "app": settings.APP_TITLE,
        "version": settings.APP_VERSION
    }

@app.get("/api/config")
async def get_config():
    """获取应用配置"""
    return {
        "title": settings.APP_TITLE,
        "version": settings.APP_VERSION,
        "max_upload_size": settings.MAX_UPLOAD_SIZE,
        "allowed_extensions": list(settings.ALLOWED_EXTENSIONS),
        "language_default": settings.LANGUAGE_DEFAULT
    }

if __name__ == "__main__":
    import uvicorn
    
    uvicorn.run(
        "app.main:app",
        host=settings.HOST,
        port=settings.PORT,
        reload=settings.RELOAD,
        log_level=settings.LOG_LEVEL.lower()
    )