package api

import (
	"context"
	"encoding/json"
	"ssq-desk/internal/service"
	"time"

	"github.com/wailsapp/wails/v2/pkg/runtime"
)

// UpdateAPI 版本更新 API
type UpdateAPI struct {
	updateService *service.UpdateService
	ctx           context.Context
}

// NewUpdateAPI 创建版本更新 API
func NewUpdateAPI(checkURL string) (*UpdateAPI, error) {
	updateService := service.NewUpdateService(checkURL)

	return &UpdateAPI{
		updateService: updateService,
	}, nil
}

// SetContext 设置上下文（用于事件推送）
func (api *UpdateAPI) SetContext(ctx context.Context) {
	api.ctx = ctx
}

// CheckUpdate 检查更新
func (api *UpdateAPI) CheckUpdate() (map[string]interface{}, error) {
	if api.updateService == nil {
		return map[string]interface{}{
			"success": false,
			"message": "更新服务未初始化",
		}, nil
	}

	result, err := api.updateService.CheckUpdate()
	if err != nil {
		errorMsg := err.Error()
		if errorMsg == "" {
			errorMsg = "未知错误"
		}
		return map[string]interface{}{
			"success": false,
			"message": errorMsg,
		}, nil
	}

	if result == nil {
		return map[string]interface{}{
			"success": false,
			"message": "检查更新返回结果为空",
		}, nil
	}

	return map[string]interface{}{
		"success": true,
		"data":    result,
	}, nil
}

// GetCurrentVersion 获取当前版本号
func (api *UpdateAPI) GetCurrentVersion() (map[string]interface{}, error) {
	version := service.GetCurrentVersion()

	// 更新配置中的版本号
	if config, err := service.LoadUpdateConfig(); err == nil && config.CurrentVersion != version {
		config.CurrentVersion = version
		service.SaveUpdateConfig(config)
	}

	return map[string]interface{}{
		"success": true,
		"data": map[string]interface{}{
			"version": version,
		},
	}, nil
}

// GetUpdateConfig 获取更新配置
func (api *UpdateAPI) GetUpdateConfig() (map[string]interface{}, error) {
	config, err := service.LoadUpdateConfig()
	if err != nil {
		return map[string]interface{}{
			"success": false,
			"message": err.Error(),
		}, nil
	}

	// 确保版本号是最新的
	latestVersion := service.GetCurrentVersion()
	if config.CurrentVersion != latestVersion {
		config.CurrentVersion = latestVersion
		service.SaveUpdateConfig(config)
	}

	return map[string]interface{}{
		"success": true,
		"data": map[string]interface{}{
			"current_version":        config.CurrentVersion,
			"last_check_time":        config.LastCheckTime.Format("2006-01-02 15:04:05"),
			"auto_check_enabled":     config.AutoCheckEnabled,
			"check_interval_minutes": config.CheckIntervalMinutes,
			"check_url":              config.CheckURL,
		},
	}, nil
}

// SetUpdateConfig 设置更新配置
func (api *UpdateAPI) SetUpdateConfig(autoCheckEnabled bool, checkIntervalMinutes int, checkURL string) (map[string]interface{}, error) {
	config, err := service.LoadUpdateConfig()
	if err != nil {
		return map[string]interface{}{
			"success": false,
			"message": err.Error(),
		}, nil
	}

	config.AutoCheckEnabled = autoCheckEnabled
	config.CheckIntervalMinutes = checkIntervalMinutes
	if checkURL != "" {
		config.CheckURL = checkURL
		// 如果 URL 改变，需要重新创建服务
		api.updateService = service.NewUpdateService(checkURL)
	}

	if err := service.SaveUpdateConfig(config); err != nil {
		return map[string]interface{}{
			"success": false,
			"message": err.Error(),
		}, nil
	}

	return map[string]interface{}{
		"success": true,
		"message": "配置保存成功",
	}, nil
}

// DownloadUpdate 下载更新包（异步，通过事件推送进度）
func (api *UpdateAPI) DownloadUpdate(downloadURL string) (map[string]interface{}, error) {
	if downloadURL == "" {
		return map[string]interface{}{
			"success": false,
			"message": "下载地址不能为空",
		}, nil
	}

	go func() {
		progressCallback := func(progress float64, speed float64, downloaded int64, total int64) {
			if api.ctx == nil {
				return
			}
			// 确保进度值在 0-100 之间
			if progress < 0 {
				progress = 0
			} else if progress > 100 {
				progress = 100
			}

			progressInfo := map[string]interface{}{
				"progress":   progress,
				"speed":      speed,
				"downloaded": downloaded,
				"total":      total,
			}
			progressJSON, _ := json.Marshal(progressInfo)
			runtime.EventsEmit(api.ctx, "download-progress", string(progressJSON))
			time.Sleep(10 * time.Millisecond)
		}

		time.Sleep(100 * time.Millisecond)
		result, err := service.DownloadUpdate(downloadURL, progressCallback)

		if api.ctx != nil {
			if err != nil {
				errorInfo := map[string]interface{}{"error": err.Error()}
				errorJSON, _ := json.Marshal(errorInfo)
				runtime.EventsEmit(api.ctx, "download-complete", string(errorJSON))
			} else {
				resultInfo := map[string]interface{}{
					"success":   true,
					"file_path": result.FilePath,
					"file_size": result.FileSize,
				}
				resultJSON, _ := json.Marshal(resultInfo)
				runtime.EventsEmit(api.ctx, "download-complete", string(resultJSON))
			}
		}
	}()

	return map[string]interface{}{
		"success": true,
		"message": "下载已开始",
	}, nil
}

// InstallUpdate 安装更新包
func (api *UpdateAPI) InstallUpdate(installerPath string, autoRestart bool) (map[string]interface{}, error) {
	return api.InstallUpdateWithHash(installerPath, autoRestart, "", "")
}

// InstallUpdateWithHash 安装更新包（带哈希验证）
func (api *UpdateAPI) InstallUpdateWithHash(installerPath string, autoRestart bool, expectedHash string, hashType string) (map[string]interface{}, error) {
	if installerPath == "" {
		return map[string]interface{}{
			"success": false,
			"message": "安装文件路径不能为空",
		}, nil
	}

	result, err := service.InstallUpdateWithHash(installerPath, autoRestart, expectedHash, hashType)
	if err != nil {
		return map[string]interface{}{
			"success": false,
			"message": err.Error(),
		}, nil
	}

	return map[string]interface{}{
		"success": result.Success,
		"message": result.Message,
		"data":    result,
	}, nil
}

// VerifyUpdateFile 验证更新文件哈希值
func (api *UpdateAPI) VerifyUpdateFile(filePath string, expectedHash string, hashType string) (map[string]interface{}, error) {
	if filePath == "" {
		return map[string]interface{}{
			"success": false,
			"message": "文件路径不能为空",
		}, nil
	}

	valid, err := service.VerifyFileHash(filePath, expectedHash, hashType)
	if err != nil {
		return map[string]interface{}{
			"success": false,
			"message": err.Error(),
		}, nil
	}

	return map[string]interface{}{
		"success": true,
		"data": map[string]interface{}{
			"valid": valid,
		},
	}, nil
}