package telegram

import (
	"fmt"
	"strconv"
	"strings"

	tele "gopkg.in/telebot.v3"
)

func (b *Bot) handleEntryDel(c tele.Context) error {
	id := strings.TrimSpace(c.Message().Payload)
	if id == "" {
		return c.Reply("用法: /del <ID>")
	}

	entry, err := b.storage.GetEntry(id)
	if err != nil {
		return c.Reply(fmt.Sprintf("❌ %v", err))
	}

	// 尝试删除频道消息
	msgDeleted := false
	if msgID := parseMessageIDFromLink(entry.Link); msgID != 0 {
		channel := &tele.Chat{ID: b.cfg.Channel.ID}
		msg := &tele.Message{ID: msgID, Chat: channel}
		if err := b.bot.Delete(msg); err == nil {
			msgDeleted = true
		}
	}

	if err := b.storage.DeleteEntry(id); err != nil {
		return c.Reply(fmt.Sprintf("❌ 删除失败: %v", err))
	}

	b.toc.TriggerUpdate()

	if msgDeleted {
		return c.Reply(fmt.Sprintf("✅ 已删除: [%s] %s\n📨 频道消息已同步删除", entry.Category, entry.Title))
	}
	return c.Reply(fmt.Sprintf("✅ 已删除: [%s] %s", entry.Category, entry.Title))
}

func (b *Bot) handleEntryEdit(c tele.Context) error {
	args := strings.SplitN(c.Message().Payload, " ", 2)
	if len(args) < 2 {
		return c.Reply("用法: /edit <ID> <新标题>")
	}

	id := args[0]
	newTitle := strings.TrimSpace(args[1])

	if err := b.storage.UpdateEntryTitle(id, newTitle); err != nil {
		return c.Reply(fmt.Sprintf("❌ %v", err))
	}

	b.toc.TriggerUpdate()
	return c.Reply(fmt.Sprintf("✅ 标题已更新为: %s", newTitle))
}

func (b *Bot) handleEntryMove(c tele.Context) error {
	args := strings.Fields(c.Message().Payload)
	if len(args) < 2 {
		return c.Reply("用法: /move <ID> <新分类>")
	}

	id := args[0]
	newCategory := args[1]

	if !b.storage.CategoryExists(newCategory) {
		return c.Reply(fmt.Sprintf("❌ 分类 [%s] 不存在", newCategory))
	}

	if err := b.storage.UpdateEntryCategory(id, newCategory); err != nil {
		return c.Reply(fmt.Sprintf("❌ %v", err))
	}

	b.toc.TriggerUpdate()
	return c.Reply(fmt.Sprintf("✅ 已移动到分类: %s", newCategory))
}

func (b *Bot) handleEntryList(c tele.Context) error {
	category := strings.TrimSpace(c.Message().Payload)

	entries, err := b.storage.ListEntries(category)
	if err != nil {
		return c.Reply(fmt.Sprintf("❌ %v", err))
	}

	if len(entries) == 0 {
		if category != "" {
			return c.Reply(fmt.Sprintf("📭 分类 [%s] 暂无条目", category))
		}
		return c.Reply("📭 暂无条目")
	}

	var sb strings.Builder
	if category != "" {
		sb.WriteString(fmt.Sprintf("📋 分类 [%s] 的条目:\n\n", category))
	} else {
		sb.WriteString("📋 所有条目:\n\n")
	}

	currentCat := ""
	for _, e := range entries {
		if category == "" && e.Category != currentCat {
			currentCat = e.Category
			sb.WriteString(fmt.Sprintf("\n【%s】\n", currentCat))
		}
		sb.WriteString(fmt.Sprintf("• [%s] %s\n", e.ID, e.Title))
	}

	return c.Reply(sb.String())
}

func (b *Bot) handleRefresh(c tele.Context) error {
	b.toc.TriggerUpdate()
	return c.Reply("🔄 目录刷新已触发")
}

// parseMessageIDFromLink 从链接中解析消息ID
// 支持格式: https://t.me/c/123456/789 或 https://t.me/username/789
func parseMessageIDFromLink(link string) int {
	parts := strings.Split(link, "/")
	if len(parts) < 1 {
		return 0
	}
	msgID, err := strconv.Atoi(parts[len(parts)-1])
	if err != nil {
		return 0
	}
	return msgID
}