import { zValidator } from "@hono/zod-validator";
import innertube from "../lib/innertube.js";
import { ChannelFindSchema } from "../models/ChannelFindSchema.js";
import { Hono } from "hono";
import channelData from "../templates/channelData.js";
import { parseSubscriberCount } from "../lib/channel.js";
import { YTNodes } from "youtubei.js";

const channel = new Hono();

channel.get(
  "/channels/:id",
  zValidator("param", ChannelFindSchema),
  async (c) => {
    const { id } = c.req.valid("param");
    
    try {
      const data = await innertube.getChannel(id);
      const { header } = data;
      
      if (!header) {
        return c.text("Channel not found", 404);
      }

      const channelInfo = header.is(YTNodes.PageHeader)
        ? {
            name: header.page_title,
            description: header.content?.description?.description?.text || "",
            thumbnail: (header.content?.image as YTNodes.DecoratedAvatarView)
              ?.avatar?.image?.[0]?.url || "",
            subCount: parseSubscriberCount(
              header.content?.metadata?.metadata_rows?.[1]
                ?.metadata_parts?.[0]?.text?.text || "0"
            ),
          }
        : header.is(YTNodes.C4TabbedHeader)
        ? {
            name: header.author?.name || "",
            description: data.metadata?.description || "",
            thumbnail: header.author?.best_thumbnail?.url || "",
            subCount: parseSubscriberCount(header.subscribers?.text || "0"),
          }
        : null;

      if (!channelInfo) {
        return c.text("Channel not found", 404);
      }

      return c.html(
        channelData(
          id,
          channelInfo.name,
          channelInfo.subCount,
          channelInfo.description,
          channelInfo.thumbnail
        )
      );
    } catch (err) {
      console.error("Error fetching channel:", err);
      return c.text("Channel not found", 404);
    }
  }
);

export default channel