import util from "./util"
import { Message } from "./message"
import { Fetcher } from "./fetcher"
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 _interactable: boolean = false;
  private _replyWith: string | null = null;
  private _inspectWith: string | null = null;
  
  private _msgFetcher: Fetcher | null = null;
  
  constructor() {
    super();
    this.innerHTML = `<div class="message_metadata"></div><div class="message_content"></div><div class="message_attachments"></div><div class="message_interactions"></div>`
  }
  
  connectedCallback() {
    this._id = this.getAttribute("data-target");
    this._adapter = this.getAttribute("data-adapter");
    const gateway = this.getAttribute("data-gateway") ?? "";
    this._msgFetcher = new Fetcher(gateway, this._adapter ?? "", "message");
    this._interactable = this.getAttribute("data-interactable") != null;
    this._replyWith = this.getAttribute("data-replywith");
    this._inspectWith = this.getAttribute("data-inspectwith");
  }
  
  attributeChangedCallback(attr: string, prev: string, next: string) {
    switch (attr) {
      case "data-target":
        if (!next) {
          return
        }
        this._id = next;
        this._message = null;
        this.innerHTML = `<div class="message_metadata"></div><div class="message_content"></div><div class="message_attachments"></div><div class="message_interactions"></div>`;
        if (this._msgFetcher) {
          this._msgFetcher.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);
        if (msg) {
          this._message = msg;
          const metadata = this.querySelector(".message_metadata");
          const content = this.querySelector(".message_content");
          const attachments = this.querySelector(".message_attachments");
          const interactions = this.querySelector(".message_interactions");
          if (metadata) {
            if (this._message.renoteId) {
              metadata.innerHTML = `<span class="message_renoter">${this._message.renoter} boosted</span><span class="message_renotetime">${new Date(this._message.renoteTime ?? 0)}</span>`
            } else {
              metadata.innerHTML = "";
            }
            metadata.innerHTML += `<span class="message_author">${this._message.author}</span><span class="message_timestamp">${new Date(this._message.created)}</span><span class="message_url">${this._message.uri}</span>${this._message.replyTo ? "<span class='message_inreplyto'>reply to " + this._message.replyTo + "</span>" : ""}<span class="message_visibility">${this._message.visibility}</span><span class="message_protocol">${this._message.protocol}</span>`
            
            const renoter = this.querySelector(".message_renoter");
            const author = this.querySelector(".message_author");
            const url = this.querySelector(".message_url");
            const replyToUrl = this.querySelector(".message_inreplyto");
            
            if (renoter) {
              renoter.addEventListener("click", this.inspect(this._message.renoter ?? "", "author"));
            }
            if (author) {
              author.addEventListener("click", this.inspect(this._message.author, "author"));
            }
            if (url) {
              url.addEventListener("click", this.inspect(this._message.uri, "message"));
            }
            if (replyToUrl) {
              replyToUrl.addEventListener("click", this.inspect(this._message.replyTo ?? "", "message"));
            }
          }
          if (content) {
            content.innerHTML = this._message.content;
          }
          if (attachments && this._message.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;
          }
          if (this._interactable && interactions) {
            interactions.innerHTML = `<button class="message_reply">reply</button><button class="message_boost">boost</button>`
            const replyBtn = this.querySelector(".message_reply");
            const boostBtn = this.querySelector(".message_boost");
            if (replyBtn) {
              replyBtn.addEventListener("click", this.reply.bind(this));
            }
            if (boostBtn) {
              boostBtn.addEventListener("click", this.boost.bind(this));
            }
          }
        }
        break;
    }
  }
  
  private reply() {
    const e = document.querySelector(`#${this._replyWith}`);
    if (e) {
      e.setAttribute("data-replyto", this._id || "");
      const txtArea = e.querySelector("textarea") as HTMLTextAreaElement;
      if (txtArea) {
        txtArea.focus();
      }
    }
  }
  
  private boost() {
    // use a Doer to boost
  }
  
  private inspect(target: string, type: string): ()=>void {
    const self = this;

    return ()=> {
      const e = document.querySelector(`#${self._inspectWith}`);
      if (e) {
        e.setAttribute("data-" + type, target);
      } else {
        window.open(target, "_blank");
      }
    }
  }
}