package command

import (
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"os"
	"strings"

	runtimeConfig "code.zhecent.com/open/shop-crm-agent/internal/config"

	"github.com/spf13/cobra"
	"golang.org/x/term"
)

type initializeConfigFunc func(token string) (string, error)
type readTokenFunc func(input io.Reader, output io.Writer) (string, error)

type initResult struct {
	Initialized bool   `json:"initialized"`
	EnvFile     string `json:"envFile"`
}

func newInitCmd() *cobra.Command {
	return newInitCommand(runtimeConfig.Initialize, readTokenFromTerminal)
}

func newInitCommand(initialize initializeConfigFunc, readToken readTokenFunc) *cobra.Command {
	return &cobra.Command{
		Use:   "init",
		Short: "初始化本地 CRM Agent 凭证",
		Args:  cobra.NoArgs,
		RunE: func(cmd *cobra.Command, args []string) error {
			token, err := readToken(cmd.InOrStdin(), cmd.ErrOrStderr())
			if err != nil {
				return err
			}
			envFile, err := initialize(token)
			if err != nil {
				return err
			}
			return json.NewEncoder(cmd.OutOrStdout()).Encode(initResult{Initialized: true, EnvFile: envFile})
		},
	}
}

func readTokenFromTerminal(input io.Reader, output io.Writer) (string, error) {
	inputFile, ok := input.(*os.File)
	if !ok || !term.IsTerminal(int(inputFile.Fd())) {
		return "", errors.New("shop-crm-agent init 必须在交互式终端运行")
	}
	if _, err := fmt.Fprint(output, "请输入 Shop 管理后台创建后仅显示一次的 CRM Agent Token: "); err != nil {
		return "", err
	}
	value, err := term.ReadPassword(int(inputFile.Fd()))
	_, _ = fmt.Fprintln(output)
	if err != nil {
		return "", fmt.Errorf("读取 CRM Agent Token 失败: %w", err)
	}
	return strings.TrimSpace(string(value)), nil
}