package financeapplication

import (
	"context"
	"fmt"
	"strings"
	"time"

	"hyapp/pkg/dingtalkrobot"
)

type dingTalkNotifier struct {
	client *dingtalkrobot.Client
}

func NewDingTalkNotifier(client *dingtalkrobot.Client) ApplicationNotifier {
	if client == nil {
		return nil
	}
	return &dingTalkNotifier{client: client}
}

func (n *dingTalkNotifier) NotifyApplicationCreated(ctx context.Context, application applicationDTO) error {
	if n == nil || n.client == nil {
		return nil
	}
	return n.client.SendMarkdown(ctx, dingtalkrobot.MarkdownMessage{
		Title: "财务申请待审核",
		Text:  financeApplicationCreatedMarkdown(application),
	})
}

func financeApplicationCreatedMarkdown(application applicationDTO) string {
	lines := []string{
		"### 财务申请待审核",
		"",
		fmt.Sprintf("- 申请ID：%d", application.ID),
		fmt.Sprintf("- APP：%s", markdownValue(application.AppCode)),
		fmt.Sprintf("- 操作：%s", markdownValue(operationLabel(application.Operation))),
		fmt.Sprintf("- 目标用户ID：%s", markdownValue(application.TargetUserID)),
		fmt.Sprintf("- 金币数量：%d", application.CoinAmount),
		fmt.Sprintf("- 充值金额 $ %s", markdownValue(application.RechargeAmount)),
		fmt.Sprintf("- 申请人：%s", markdownValue(actorLabel(application.ApplicantName, application.ApplicantUserID))),
		fmt.Sprintf("- 发起时间：%s", markdownValue(formatNotifyMillis(application.CreatedAtMS))),
		"- 后台地址：https://admin-acc.global-interaction.com/finance/",
	}
	if application.WalletIdentity != "" {
		lines = append(lines, fmt.Sprintf("- 钱包身份：%s", markdownValue(walletIdentityLabel(application.WalletIdentity))))
	}
	if application.CredentialText != "" {
		lines = append(lines, fmt.Sprintf("- 凭证文字：%s", markdownValue(application.CredentialText)))
	}
	if application.CredentialImageURL != "" {
		imageURL := strings.TrimSpace(application.CredentialImageURL)
		lines = append(lines, "- 凭证图片：", fmt.Sprintf("![凭证图片](%s)", imageURL))
	}
	return strings.Join(lines, "\n")
}

func operationLabel(value string) string {
	switch value {
	case "user_coin_credit":
		return "增加用户金币"
	case "user_coin_debit":
		return "减少用户金币"
	case "user_wallet_debit":
		return "用户钱包扣减"
	case "user_wallet_credit":
		return "用户钱包增加"
	case "coin_seller_coin_credit":
		return "增加币商金币"
	case "coin_seller_coin_debit":
		return "减少币商金币"
	default:
		return value
	}
}

func walletIdentityLabel(value string) string {
	switch value {
	case "host":
		return "host"
	case "agency":
		return "agency"
	case "bd":
		return "bd"
	default:
		return value
	}
}

func actorLabel(name string, userID uint) string {
	name = strings.TrimSpace(name)
	if name == "" {
		return fmt.Sprintf("%d", userID)
	}
	return fmt.Sprintf("%s(%d)", name, userID)
}

func formatNotifyMillis(value int64) string {
	if value <= 0 {
		return "-"
	}
	// 财务审批群主要按北京时间协作；数据库仍保存 Unix 毫秒，这里只在通知文本中转换展示。
	return time.UnixMilli(value).In(time.FixedZone("UTC+8", 8*60*60)).Format("2006-01-02 15:04:05")
}

func markdownValue(value string) string {
	value = strings.TrimSpace(value)
	if value == "" {
		return "-"
	}
	if len([]rune(value)) > 240 {
		runes := []rune(value)
		value = string(runes[:240]) + "..."
	}
	replacer := strings.NewReplacer("\r", " ", "\n", " ", "\t", " ")
	return replacer.Replace(value)
}