import { DownloadButton } from "@mariozechner/mini-lit/dist/DownloadButton.js";
import { html, type TemplateResult } from "lit";
import { customElement, property } from "lit/decorators.js";
import { i18n } from "../../utils/i18n.js";
import { ArtifactElement } from "./ArtifactElement.js";

@customElement("generic-artifact")
export class GenericArtifact extends ArtifactElement {
  @property({ type: String }) private _content = "";

  get content(): string {
    return this._content;
  }

  set content(value: string) {
    this._content = value;
    this.requestUpdate();
  }

  protected override createRenderRoot(): HTMLElement | DocumentFragment {
    return this;
  }

  override connectedCallback(): void {
    super.connectedCallback();
    this.style.display = "block";
    this.style.height = "100%";
  }

  private decodeBase64(): Uint8Array {
    let base64Data = this._content;
    if (this._content.startsWith("data:")) {
      const base64Match = this._content.match(/base64,(.+)/);
      if (base64Match) {
        base64Data = base64Match[1];
      }
    }

    const binaryString = atob(base64Data);
    const bytes = new Uint8Array(binaryString.length);
    for (let i = 0; i < binaryString.length; i++) {
      bytes[i] = binaryString.charCodeAt(i);
    }
    return bytes;
  }

  private getMimeType(): string {
    const ext = this.filename.split(".").pop()?.toLowerCase();
    // Add common MIME types
    const mimeTypes: Record<string, string> = {
      pdf: "application/pdf",
      zip: "application/zip",
      tar: "application/x-tar",
      gz: "application/gzip",
      rar: "application/vnd.rar",
      "7z": "application/x-7z-compressed",
      mp3: "audio/mpeg",
      mp4: "video/mp4",
      avi: "video/x-msvideo",
      mov: "video/quicktime",
      wav: "audio/wav",
      ogg: "audio/ogg",
      json: "application/json",
      xml: "application/xml",
      bin: "application/octet-stream",
    };
    return mimeTypes[ext || ""] || "application/octet-stream";
  }

  public getHeaderButtons() {
    return html`
      <div class="flex items-center gap-1">
        ${DownloadButton({
          content: this.decodeBase64(),
          filename: this.filename,
          mimeType: this.getMimeType(),
          title: i18n("Download"),
        })}
      </div>
    `;
  }

  override render(): TemplateResult {
    return html`
      <div class="h-full flex items-center justify-center bg-background p-8">
        <div class="text-center max-w-md">
          <div class="text-muted-foreground text-lg mb-4">
            <svg
              xmlns="http://www.w3.org/2000/svg"
              class="h-16 w-16 mx-auto mb-4 text-muted-foreground/50"
              fill="none"
              viewBox="0 0 24 24"
              stroke="currentColor"
            >
              <path
                stroke-linecap="round"
                stroke-linejoin="round"
                stroke-width="1.5"
                d="M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z"
              />
            </svg>
            <div class="font-medium text-foreground mb-2">${this.filename}</div>
            <p class="text-sm">
              ${i18n("Preview not available for this file type.")}
              ${i18n(
                "Click the download button above to view it on your computer.",
              )}
            </p>
          </div>
        </div>
      </div>
    `;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    "generic-artifact": GenericArtifact;
  }
}