// API 进程入口，负责装配依赖、启动 HTTP 服务和异步任务处理器并执行平滑关闭。
package main

import (
	"context"
	"errors"
	"log/slog"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"juhe-factory/api/internal/cache"
	"juhe-factory/api/internal/config"
	"juhe-factory/api/internal/database"
	"juhe-factory/api/internal/datetime"
	"juhe-factory/api/internal/handler"
	adminmodule "juhe-factory/api/internal/modules/admin"
	"juhe-factory/api/internal/modules/productimage"
	"juhe-factory/api/internal/modules/prompt"
	"juhe-factory/api/internal/queue"
	"juhe-factory/api/internal/security"
	"juhe-factory/api/internal/server"
	"juhe-factory/api/internal/service"
	"juhe-factory/api/internal/storage"
	"juhe-factory/api/internal/worker"

	"github.com/hibiken/asynq"
)

func main() {
	time.Local = datetime.Location
	cfg, err := config.Load()
	if err != nil {
		slog.Error("加载配置失败", "error", err)
		os.Exit(1)
	}

	gormDB, sqlDB, err := database.Open(cfg)
	if err != nil {
		slog.Error("连接 PostgreSQL 失败", "error", err)
		os.Exit(1)
	}
	defer sqlDB.Close()

	redisClient, err := cache.Open(cfg)
	if err != nil {
		slog.Error("连接 Redis 失败", "error", err)
		os.Exit(1)
	}
	defer redisClient.Close()

	queueClient := queue.NewClient(cfg)
	defer queueClient.Close()

	healthHandler := handler.NewHealth(sqlDB, redisClient)
	passwords := security.PasswordHasher{Time: cfg.Argon2Time, Memory: cfg.Argon2Memory, Parallelism: cfg.Argon2Parallelism, HashLength: cfg.Argon2HashLength, SaltLength: cfg.Argon2SaltLength}
	tokens := security.TokenService{Secret: []byte(cfg.JWTSecretKey), AccessTTL: time.Duration(cfg.JWTAccessMinutes) * time.Minute, RefreshTTL: time.Duration(cfg.JWTRefreshHours) * time.Hour}
	encryptor, err := security.NewEncryptor(cfg.EncryptionKey)
	if err != nil {
		slog.Error("加载敏感配置加密密钥失败", "error", err)
		os.Exit(1)
	}
	authService := service.NewAuth(gormDB, passwords, tokens)
	if err := authService.Bootstrap(cfg.BootstrapAdminUsername, cfg.BootstrapAdminPassword); err != nil {
		slog.Error("初始化管理员失败", "error", err)
		os.Exit(1)
	}
	cos, err := storage.NewCOS(context.Background(), cfg)
	if err != nil {
		slog.Error("初始化 COS 失败", "error", err)
		os.Exit(1)
	}
	adminDataService := &service.AdminData{DB: gormDB, Passwords: passwords, Encryptor: encryptor, HTTPClient: http.DefaultClient, EncryptionKeyVersion: cfg.EncryptionKeyVersion}
	webService := &service.Web{DB: gormDB, Passwords: passwords, Tokens: security.WebTokenService{Secret: []byte(cfg.JWTSecretKey), AccessTTL: time.Duration(cfg.JWTAccessMinutes) * time.Minute}, RefreshTTL: time.Duration(cfg.JWTRefreshHours) * time.Hour}
	creativeService := &service.Creative{DB: gormDB, Queue: queueClient, Encryptor: encryptor, HTTPClient: http.DefaultClient}
	adminService := adminmodule.NewService(gormDB)
	promptService := prompt.NewService(gormDB)
	productImageService := productimage.NewService(gormDB, queueClient)
	creativeHandler := handler.NewCreative(creativeService, promptService, cos)
	httpServer := server.New(cfg, healthHandler, handler.NewAdminAuth(authService), handler.NewAdminData(adminDataService, adminService, promptService, cos), handler.NewWeb(webService, cos), creativeHandler, handler.NewProductImage(productImageService, cos))

	aiHTTP := worker.NewHTTPClient(cfg.AIHTTPMaxConnections)
	generationWorker := worker.NewGeneration(gormDB, queueClient, cos, encryptor, aiHTTP, time.Duration(cfg.AIPollIntervalSeconds)*time.Second)
	mediaWorker := worker.NewMedia(gormDB, cos, encryptor, aiHTTP, cfg.FFmpegPath, cfg.FFprobePath, cfg.PythonPath, cfg.ASRScriptPath)
	dramaParseWorker := worker.NewDramaParse(gormDB, queueClient, encryptor, aiHTTP)
	scriptAnalysisWorker := worker.NewScriptAnalysis(gormDB, queueClient, encryptor, aiHTTP)
	workerMux := asynq.NewServeMux()
	generationWorker.Register(workerMux)
	mediaWorker.Register(workerMux)
	dramaParseWorker.Register(workerMux)
	scriptAnalysisWorker.Register(workerMux)
	queueServer := queue.NewServer(cfg)
	workerErr := make(chan error, 1)
	go func() {
		slog.Info("AI 任务 Worker 已启动", "concurrency", cfg.AIWorkerConcurrency)
		workerErr <- queueServer.Run(workerMux)
	}()
	if err := generationWorker.Recover(context.Background()); err != nil {
		slog.Error("恢复 AI 任务失败", "error", err)
	}
	if err := dramaParseWorker.Recover(context.Background()); err != nil {
		slog.Error("恢复短剧创作解析任务失败", "error", err)
	}
	if err := scriptAnalysisWorker.Recover(context.Background()); err != nil {
		slog.Error("恢复剧本分析任务失败", "error", err)
	}
	serverErr := make(chan error, 1)
	go func() {
		slog.Info("API 服务已启动", "address", cfg.ServerAddress)
		serverErr <- httpServer.ListenAndServe()
	}()

	stop := make(chan os.Signal, 1)
	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)

	select {
	case sig := <-stop:
		slog.Info("收到停止信号", "signal", sig.String())
	case err = <-serverErr:
		if !errors.Is(err, http.ErrServerClosed) {
			slog.Error("API 服务异常退出", "error", err)
			os.Exit(1)
		}
	case err = <-workerErr:
		if err != nil {
			slog.Error("AI 任务 Worker 异常退出", "error", err)
		}
	}
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	queueServer.Shutdown()
	if err := httpServer.Shutdown(ctx); err != nil {
		slog.Error("API 服务关闭失败", "error", err)
		os.Exit(1)
	}
}