import { Context } from "grammy";
import { CosmoeClient } from "../../client/cosmoe";

export async function handleEventDetails(ctx: Context): Promise<void> {
  try {
    if (!ctx.message || !ctx.message.text) {
      return;
    }
    
    const match = /^\/event_(.+)$/.exec(ctx.message.text);
    if (match && match[1]) {
      const cosmoeClient = new CosmoeClient();
      const eventId = match[1];
      const result = await cosmoeClient.getEventDetail(eventId);
      
      if (result.code === 200) {
        const event = result.data;
        let message = `*${event.name}*\n`;
        message += `📅 *日期* ${event.event_date}\n\n`;
        message += `⏰ *时间段*\n`;
        
        if (event.slots && event.slots.length > 0) {
          // Check if today is the event day or before the event day (Beijing time)
          const eventDate = new Date(event.event_date);
          const now = new Date();
          
          // Adjust to Beijing timezone (UTC+8)
          const beijingOffset = 8 * 60; // 8 hours in minutes
          const beijingTime = new Date(now.getTime() + (now.getTimezoneOffset() + beijingOffset) * 60000);
          
          // Reset time parts for comparison (compare dates only)
          const todayDate = new Date(beijingTime.getFullYear(), beijingTime.getMonth(), beijingTime.getDate());
          const eventDay = new Date(eventDate.getFullYear(), eventDate.getMonth(), eventDate.getDate());
          
          const isEventActive = todayDate <= eventDay;
          
          // Sort slots by range for consistent ordering
          const sortedSlots = [...event.slots].sort((a, b) => a.range.localeCompare(b.range));
          
          sortedSlots.forEach((slot: any, index: number) => {
            message += `• ${slot.range}: ¥${slot.price} (${slot.remaining}/${slot.capacity})\n`;
            if (slot.remaining > 0 && isEventActive) {
              message += `  • 预约 -> /book\\_${eventId}\\_${index}\n`;
            }
          });
        } else {
          message += "没有可预约的时间段\n";
        }
        
        message += `\n🖼️ *封面图* ${event.cover_image_url}`;
        
        await ctx.reply(message, { parse_mode: "Markdown" });
      } else {
        await ctx.reply(`获取活动详情时出错: ${result.msg || '未知错误'}`);
      }
    }
  } catch (error) {
    console.error("Error fetching event details:", error);
    await ctx.reply("获取活动详情时出错，请稍后再试");
  }
}