package cmd

import (
	"fmt"

	"api-server/internal/auth"
	"api-server/internal/db"

	"github.com/spf13/cobra"
)

var userCmd = &cobra.Command{
	Use:   "user",
	Short: "用户管理",
}

func openDB(cmd *cobra.Command) (*db.DB, error) {
	dbDriver, _ := cmd.Flags().GetString("db-driver")
	dbDSN, _ := cmd.Flags().GetString("db-dsn")
	return db.Open(db.Config{Driver: db.Driver(dbDriver), DSN: dbDSN})
}

var userListCmd = &cobra.Command{
	Use:   "list",
	Short: "列出所有用户",
	RunE: func(cmd *cobra.Command, args []string) error {
		database, err := openDB(cmd)
		if err != nil {
			return err
		}
		defer database.Close()

		users, err := database.ListUsers()
		if err != nil {
			return err
		}
		for _, u := range users {
			fmt.Printf("  [%d] %s  %s  %s\n", u.ID, u.Role, u.Email, u.Name)
		}
		return nil
	},
}

var userPromoteCmd = &cobra.Command{
	Use:   "promote <email>",
	Short: "提升用户为管理员",
	Args:  cobra.ExactArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		database, err := openDB(cmd)
		if err != nil {
			return err
		}
		defer database.Close()

		if err := database.PromoteUser(args[0]); err != nil {
			return fmt.Errorf("提升失败: %w", err)
		}
		fmt.Printf("✅ 用户 %s 已提升为管理员\n", args[0])
		return nil
	},
}

var userCreateCmd = &cobra.Command{
	Use:   "create <email> <password> [name]",
	Short: "创建用户（默认角色 user）",
	Args:  cobra.RangeArgs(2, 3),
	RunE: func(cmd *cobra.Command, args []string) error {
		database, err := openDB(cmd)
		if err != nil {
			return err
		}
		defer database.Close()

		email, password := args[0], args[1]
		name := ""
		if len(args) > 2 {
			name = args[2]
		}

		isAdmin, _ := cmd.Flags().GetBool("admin")

		hash, err := auth.HashPassword(password)
		if err != nil {
			return fmt.Errorf("密码加密失败: %w", err)
		}

		user, err := database.CreateUser(email, hash, name)
		if err != nil {
			return fmt.Errorf("创建失败: %w", err)
		}

		if isAdmin {
			if err := database.PromoteUser(email); err != nil {
				return fmt.Errorf("提升为管理员失败: %w", err)
			}
		}

		fmt.Printf("✅ 用户 [%d] %s 创建成功 (role=%s)\n", user.ID, user.Email, user.Role)
		return nil
	},
}

var userDeleteCmd = &cobra.Command{
	Use:   "delete <email>",
	Short: "删除用户",
	Args:  cobra.ExactArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		database, err := openDB(cmd)
		if err != nil {
			return err
		}
		defer database.Close()

		if err := database.DeleteUser(args[0]); err != nil {
			return fmt.Errorf("删除失败: %w", err)
		}
		fmt.Printf("✅ 用户 %s 已删除\n", args[0])
		return nil
	},
}

var userResetPwdCmd = &cobra.Command{
	Use:   "reset-password <email> <new-password>",
	Short: "重置用户密码",
	Args:  cobra.ExactArgs(2),
	RunE: func(cmd *cobra.Command, args []string) error {
		database, err := openDB(cmd)
		if err != nil {
			return err
		}
		defer database.Close()

		hash, err := auth.HashPassword(args[1])
		if err != nil {
			return fmt.Errorf("密码加密失败: %w", err)
		}

		if err := database.UpdatePassword(args[0], hash); err != nil {
			return fmt.Errorf("密码重置失败: %w", err)
		}
		fmt.Printf("✅ 用户 %s 密码已重置\n", args[0])
		return nil
	},
}

func init() {
	userCmd.PersistentFlags().String("db-driver", "sqlite", "数据库驱动")
	userCmd.PersistentFlags().String("db-dsn", "./data/api.db", "数据库 DSN")
	userCmd.AddCommand(userListCmd)
	userCmd.AddCommand(userPromoteCmd)
	userCmd.AddCommand(userCreateCmd)
	userCmd.AddCommand(userDeleteCmd)
	userCmd.AddCommand(userResetPwdCmd)
	userCreateCmd.Flags().Bool("admin", false, "创建后直接提升为管理员")
}