package commands

import (
	"fmt"
	"os"
	"path/filepath"

	"github.com/spf13/cobra"
	"github.com/user/devpack/internal/config"
	"github.com/user/devpack/internal/logging"
)

func newInitCmd() *cobra.Command {
	var (
		profile  string
		template string
		force    bool
	)

	cmd := &cobra.Command{
		Use:   "init",
		Short: "初始化 DevPack 配置",
		Long:  `初始化 DevPack，创建配置目录和默认配置文件。`,
		RunE: func(cmd *cobra.Command, args []string) error {
			log := logging.G()
			fmt.Println("🚀 正在初始化 DevPack...")

			// 获取标准路径
			paths, err := config.DefaultPaths()
			if err != nil {
				return fmt.Errorf("无法获取用户主目录: %w", err)
			}

			// 检测是否已初始化
			if !force {
				if _, err := os.Stat(paths.Config); err == nil {
					fmt.Println("⚠️  DevPack 已初始化过。使用 --force 覆盖。")
					return nil
				}
			}

			// 创建所有目录 (~/.devpack/, profiles/, packs/, logs/, tmp/)
			log.Debug("正在创建目录结构...")
			if err := paths.EnsureDirs(); err != nil {
				return fmt.Errorf("创建目录失败: %w", err)
			}
			log.Debugf("目录结构已创建: %s", paths.Home)

			// 生成默认配置文件
			log.Debug("正在生成默认配置文件...")
			if err := writeDefaultConfig(paths.Config, force); err != nil {
				return fmt.Errorf("创建配置文件失败: %w", err)
			}
			fmt.Printf("  ✅ 配置文件: %s\n", paths.Config)

			// 创建默认 Profile
			profileName := template
			if profile != "" {
				profileName = profile
			}
			log.Debugf("正在创建 Profile: %s (模板: %s)", profileName, template)
			if err := writeDefaultProfile(paths.Profiles, profileName, template, force); err != nil {
				return fmt.Errorf("创建 Profile 失败: %w", err)
			}
			fmt.Printf("  ✅ Profile: %s\n", filepath.Join(paths.Profiles, profileName+".yaml"))

			fmt.Println("\n✅ DevPack 初始化完成!")
			fmt.Println("\n运行 'devpack scan' 扫描当前开发环境。")
			return nil
		},
	}

	cmd.Flags().StringVarP(&profile, "profile", "p", "", "创建并使用指定名称的 Profile")
	cmd.Flags().StringVarP(&template, "template", "t", "standard", "使用预设模板 (minimal|standard|full)")
	cmd.Flags().BoolVar(&force, "force", false, "覆盖已有配置")

	return cmd
}

// writeDefaultConfig 写入默认配置文件
func writeDefaultConfig(path string, force bool) error {
	if !force {
		if _, err := os.Stat(path); err == nil {
			return nil // 已存在且不强制覆盖，跳过
		}
	}

	defaultConfig := `# DevPack 配置文件
# 详见文档: https://github.com/user/devpack

# 日志设置
log_level: info
# log_file: ~/.devpack/logs/devpack.log

# 默认 Profile
default_profile: standard

# 还原选项
restore:
  conflict_strategy: prompt   # skip | overwrite | merge | prompt | newest
  create_restore_point: true
  dry_run_first: false
`
	return os.WriteFile(path, []byte(defaultConfig), 0o644)
}

// writeDefaultProfile 根据模板写入默认 Profile
func writeDefaultProfile(dir, name, template string, force bool) error {
	path := filepath.Join(dir, name+".yaml")
	if !force {
		if _, err := os.Stat(path); err == nil {
			return nil // 已存在且不强制覆盖，跳过
		}
	}

	var content string
	switch template {
	case "minimal":
		content = `# DevPack Profile - 最小配置
name: ` + name + `
description: "最小开发环境配置"

collectors:
  runtime:
    enabled: true
    include: []
  editor:
    enabled: false
  shell:
    enabled: false
  package:
    enabled: false
  git:
    enabled: true
  env:
    enabled: false
`
	case "full":
		content = `# DevPack Profile - 完整配置
name: ` + name + `
description: "完整开发环境配置"

collectors:
  runtime:
    enabled: true
    include: [go, node, python]
  editor:
    enabled: true
    include: [vscode]
    options:
      vscode:
        capture_extensions: true
        capture_settings: true
        capture_keybindings: true
        capture_snippets: true
  shell:
    enabled: true
    include: [powershell]
  package:
    enabled: true
    include: [scoop]
  git:
    enabled: true
    options:
      capture_aliases: true
  env:
    enabled: true
    options:
      include_patterns: ["GOPATH", "GOROOT", "PATH", "NODE_*", "PYTHON*"]
      exclude_patterns: ["*_KEY", "*_SECRET", "*_TOKEN"]
`
	default: // standard
		content = `# DevPack Profile - 标准配置
name: ` + name + `
description: "标准开发环境配置"

collectors:
  runtime:
    enabled: true
    include: [go, node, python]
  editor:
    enabled: true
    include: [vscode]
    options:
      vscode:
        capture_extensions: true
        capture_settings: true
  shell:
    enabled: true
    include: [powershell]
  package:
    enabled: true
    include: [scoop]
  git:
    enabled: true
  env:
    enabled: true
    options:
      include_patterns: ["GOPATH", "GOROOT", "PATH"]
      exclude_patterns: ["*_KEY", "*_SECRET", "*_TOKEN"]
`
	}

	return os.WriteFile(path, []byte(content), 0o644)
}