package main

import (
	"encoding/json"
	"fmt"
	"log/slog"
	"time"

	"u-desk/internal/api"
	"u-desk/internal/common"
	"u-desk/internal/service"
	"u-desk/internal/storage"
	"u-desk/internal/storage/models"

	"gorm.io/gorm"
)

// ========== 应用配置接口 ==========

// GetAppConfig 获取应用配置
func (a *App) GetAppConfig() (map[string]interface{}, error) {
	if a.configAPI == nil {
		return nil, fmt.Errorf("配置服务正在初始化中")
	}
	return a.configAPI.GetAppConfig()
}

// SaveAppConfig 保存应用配置
func (a *App) SaveAppConfig(req SaveAppConfigRequest) (map[string]interface{}, error) {
	if a.configAPI == nil {
		return nil, fmt.Errorf("配置服务正在初始化中")
	}

	oldConfig, _ := a.configAPI.GetAppConfig()
	var oldVisibleTabs []string
	if success, ok := oldConfig["success"].(bool); ok && success {
		if data, ok := oldConfig["data"].(map[string]interface{}); ok {
			if vtInterface, ok := data["visibleTabs"].([]interface{}); ok {
				oldVisibleTabs = common.InterfaceSliceToStringSlice(vtInterface)
			}
		}
	}

	apiReq := api.SaveAppConfigRequest{
		Tabs:        req.Tabs,
		VisibleTabs: req.VisibleTabs,
		DefaultTab:  req.DefaultTab,
	}

	result, err := a.configAPI.SaveAppConfig(apiReq)
	if err != nil {
		return result, err
	}

	if success, ok := result["success"].(bool); ok && success {
		a.handleNewlyEnabledModules(oldVisibleTabs, req.VisibleTabs)
	}

	return result, nil
}

func (a *App) LoadConnectionProfiles() ([]map[string]interface{}, error) {
	list, err := a.ensureProfileSvc().ListProfiles()
	if err != nil {
		return nil, err
	}
	var result []map[string]interface{}
	data, _ := json.Marshal(list)
	if err := json.Unmarshal(data, &result); err != nil {
		return nil, fmt.Errorf("解析连接配置失败: %w", err)
	}
	return result, nil
}

func (a *App) SaveConnectionProfile(req SaveProfileRequest) (map[string]interface{}, error) {
	p := &models.ConnectionProfile{
		Name: req.Name, Host: req.Host, Port: req.Port,
		Username: req.Username, Password: req.Password,
		KeyPath: req.KeyPath, Type: req.Type, Provider: req.Provider, Token: req.Token,
		AccessKey: req.AccessKey, SecretKey: req.SecretKey,
		Bucket: req.Bucket, Region: req.Region, Endpoint: req.Endpoint,
	}
	if req.LastConnected != nil {
		t := time.Unix(*req.LastConnected, 0)
		p.LastConnected = &t
	}
	if req.ID != nil {
		p.ID = *req.ID
	}
	if err := a.ensureProfileSvc().SaveProfile(p); err != nil {
		return nil, err
	}
	return map[string]interface{}{"id": float64(p.ID), "success": true}, nil
}

func (a *App) DeleteConnectionProfile(id uint) error {
	return a.ensureProfileSvc().DeleteProfile(id)
}

// BgmGetPlaylist 获取播放列表
func (a *App) BgmGetPlaylist() ([]BgmPlaylistItem, error) {
	db := storage.GetDB()
	if db == nil {
		return nil, fmt.Errorf("数据库未初始化")
	}
	var rows []models.BgmPlaylist
	if err := db.Order("sort ASC").Find(&rows).Error; err != nil {
		return nil, fmt.Errorf("查询播放列表失败: %w", err)
	}
	items := make([]BgmPlaylistItem, len(rows))
	for i, r := range rows {
		items[i] = BgmPlaylistItem{Name: r.Name, Path: r.Path, ProfileID: r.ProfileID}
	}
	return items, nil
}

// BgmSavePlaylist 全量保存播放列表（前端调用时传完整列表）
func (a *App) BgmSavePlaylist(items []BgmPlaylistItem) error {
	db := storage.GetDB()
	if db == nil {
		return fmt.Errorf("数据库未初始化")
	}
	return db.Transaction(func(tx *gorm.DB) error {
		if err := tx.Exec("DELETE FROM bgm_playlist").Error; err != nil {
			return err
		}
		sort := uint(0)
		for _, item := range items {
			if item.Name == "" || item.Path == "" {
				continue
			}
			if err := tx.Create(&models.BgmPlaylist{Name: item.Name, Path: item.Path, ProfileID: item.ProfileID, Sort: sort}).Error; err != nil {
				return err
			}
			sort++
		}
		return nil
	})
}

func (a *App) ensureProfileSvc() *service.ProfileService {
	a.mu.Lock()
	defer a.mu.Unlock()
	if a.profileSvc == nil {
		a.profileSvc = service.NewProfileService()
	}
	return a.profileSvc
}

// getVisibleTabs 获取配置中的可见 Tabs
func (a *App) getVisibleTabs() []string {
	config, err := a.configAPI.GetAppConfig()
	if err != nil {
		slog.Warn("读取配置失败，使用默认配置", "error", err)
		return common.DefaultVisibleTabs
	}

	success, ok := config["success"].(bool)
	if !ok || !success {
		slog.Warn("配置读取失败，使用默认配置")
		return common.DefaultVisibleTabs
	}

	data, ok := config["data"].(map[string]interface{})
	if !ok {
		return common.DefaultVisibleTabs
	}

	visibleTabsInterface, ok := data["visibleTabs"].([]interface{})
	if !ok {
		return common.DefaultVisibleTabs
	}

	visibleTabs := common.InterfaceSliceToStringSlice(visibleTabsInterface)

	if len(visibleTabs) == 0 {
		return common.DefaultVisibleTabs
	}

	return visibleTabs
}

// handleNewlyEnabledModules 处理新启用的模块
func (a *App) handleNewlyEnabledModules(oldTabs, newTabs []string) {
	newlyEnabled := common.Difference(newTabs, oldTabs)

	if len(newlyEnabled) == 0 {
		return
	}

	slog.Info("检测到新启用的模块", "modules", newlyEnabled)

	for _, tab := range newlyEnabled {
		switch tab {
		case common.TabFileSystem:
			a.initFilesystemModule()
		case common.TabDevice:
			slog.Info("设备测试模块已启用")
		}
	}
}

// initModulesByConfig 根据配置初始化模块
func (a *App) initModulesByConfig(visibleTabs []string) error {
	if common.Contains(visibleTabs, common.TabFileSystem) {
		a.initFilesystemModule()
		if a.filesystem == nil {
			return fmt.Errorf("文件系统服务初始化失败")
		}
	} else {
		slog.Info("跳过文件系统模块（未启用）")
	}

	return nil
}