package cmd

import (
	"fmt"
	"os"
	"strings"

	"github.com/spf13/cobra"
)

var (
	vaultPath string
	dbPath    string
)

// buildLong 为父命令动态生成 Long，格式：# cmd - Short\n子命令详细用法
func buildLong(cmd *cobra.Command) string {
	var sb strings.Builder
	sb.WriteString(fmt.Sprintf("# %s - %s\n", cmd.Name(), cmd.Short))
	for _, sub := range cmd.Commands() {
		if sub.Hidden {
			continue
		}
		if sub.Long != "" {
			sb.WriteString(sub.Long)
			// 确保 Long 末尾有换行
			if !strings.HasSuffix(sub.Long, "\n") {
				sb.WriteString("\n")
			}
		} else {
			sb.WriteString(fmt.Sprintf("%s # %s\n", sub.CommandPath(), sub.Short))
		}
	}
	return sb.String()
}

var rootCmd = &cobra.Command{
	Use:   "kb-cli",
	Short: "知识库搜索与管理工具",
	Long: `kb-cli - 知识库搜索与管理工具

Global: [--vault=<路径>] [--db=<路径>]`,
}

func Execute() {
	// 为每个父命令动态生成 Long（包含子命令详细用法）
	for _, cmd := range rootCmd.Commands() {
		if cmd.HasAvailableSubCommands() && !cmd.Hidden {
			cmd.Long = buildLong(cmd)
		}
	}

	// root Long = 头部 + 所有一级子命令的 Long
	var sb strings.Builder
	sb.WriteString(rootCmd.Long)
	for _, cmd := range rootCmd.Commands() {
		if cmd.Hidden {
			continue
		}
		sb.WriteString("\n")
		sb.WriteString(cmd.Long)
	}
	rootCmd.Long = sb.String()

	if err := rootCmd.Execute(); err != nil {
		cobra.CheckErr(err)
	}
}

func init() {
	homeDir, _ := os.UserHomeDir()
	defaultVault := os.Getenv("KB_VAULT")
	if defaultVault == "" {
		defaultVault = homeDir + "/aisim/note/001/笔记001"
	}
	defaultDB := homeDir + "/.cache/kb-cli/kb.db"

	rootCmd.PersistentFlags().StringVar(&vaultPath, "vault", defaultVault, "知识库根目录")
	rootCmd.PersistentFlags().StringVar(&dbPath, "db", defaultDB, "索引数据库路径")

	// 自定义 help 模板：只输出 Long
	helpTemplate := `{{.Long}}`
	rootCmd.SetUsageTemplate(helpTemplate)
	rootCmd.SetHelpTemplate(helpTemplate)

	rootCmd.SilenceUsage = true
	rootCmd.SilenceErrors = true
}