import util from "./util"
import { Message } from "./message"
import { BatchTimer } from "./batch-timer"
import { AdapterState } from "./adapter"

export class MessageElement extends HTMLElement {
  static observedAttributes = [ "data-target", "data-latest", "data-adapter", "data-replyCt", "data-reactionCt", "data-boostCt" ]
  
  private _id: string | null = null;
  private _adapter: string | null = null;
  
  private _message: Message | null = null;
  
  private _messageTimer: BatchTimer | null = null;
  
  constructor() {
    super();
    this.innerHTML = `<div class="message_metadata"></div><div class="message_content"></div><div class="message_attachments"></div>`
  }
  
  connectedCallback() {
    this._id = this.getAttribute("data-target");
    this._adapter = this.getAttribute("data-adapter");
    const gateway = this.getAttribute("data-gateway") ?? "";
    this._messageTimer = new BatchTimer((ids: string[])=>{
      let url = `${gateway}/api/adapters/${this._adapter}/fetch?entity_type=message`;
      for (let id of ids) {
        url += `&entity_id=${id}`;
      }
      util.authorizedFetch("GET", url, null);
    });
  }
  
  attributeChangedCallback(attr: string, prev: string, next: string) {
    switch (attr) {
      case "data-target":
        if (!next) {
          return
        }
        this._id = next;
        if (this._messageTimer) {
          this._messageTimer.queue(next, 100);
        }
        break;
      case "data-latest":
        let datastore = AdapterState._instance.data.get(this._adapter ?? "");
        if (!datastore) {
          console.log("no data yet, wait for some to come in maybe...");
          return;
        }
        let msg = datastore.messages.get(next);
        console.log("MessageElement.attributeChangedCallback: " + JSON.stringify(msg));
        if (msg) {
          this._message = msg;
          const metadata = this.querySelector(".message_metadata");
          const content = this.querySelector(".message_content");
          const attachments = this.querySelector(".message_attachments");
          if (metadata) {
            metadata.innerHTML = `<span class="message_author">${this._message.author}</span><span class="message_timestamp">${new Date(this._message.created)}</span><span class="message_visibility">${this._message.visibility}</span><span class="message_protocol">${this._message.protocol}</span>`
          }
          if (content) {
            content.innerHTML = this._message.content;
          }
          if (attachments && this._message.attachments.length > 0) {
            let html = "<ul>";
            for (const a of this._message.attachments) {
              // we can do it based on actual mimetype later but now let's just do an extension check
              const srcUrl = new URL(a.src);
              const pathParts = srcUrl.pathname.split(".");
              if (pathParts.length < 2) {
                html += `<li><a href="${a.src}">${a.desc}</a></li>`
                continue;
              } 
              const ext = pathParts[pathParts.length - 1];
              switch (ext.toLowerCase()) {
                case "jpg":
                case "jpeg":
                case "png":
                case "gif":
                case "avif":
                case "svg":
                case "bmp":
                  html += `<li><a href="${a.src}"><img src="${a.src}" alt="${a.desc}"/></a>`
                  break;
                case "mp3":
                case "wav":
                case "ogg":
                case "opus":
                case "aac":
                case "flac":
                  html += `<li><audio src="${a.src}" controls preload="metadata"><a href="${a.src}">${a.desc}</a></audio></li>`
                  break;
                case "mp4":
                case "mkv":
                case "avi":
                case "mov":
                  html += `<li><video src="${a.src}" controls preload="metadata"><a href="${a.src}">${a.desc}</a></video></li>`
                  break;
                default:
                  html += `<li><a href="${a.src}">${a.desc}</a></li>`
              }
            }
            html += "</ul>";
            attachments.innerHTML = html;
          }
        }
        break;
    }
  }
}