/** Shows the most recent binaries for which we have code size statistics. */

import { define } from 'elements-sk/define';
import { html } from 'lit-html';
import { jsonOrThrow } from 'common-sk/modules/jsonOrThrow';
import { ElementSk } from '../../../infra-sk/modules/ElementSk';
import { CodesizeScaffoldSk } from '../codesize-scaffold-sk/codesize-scaffold-sk';
import { Binary, BinariesFromCommitOrPatchset, MostRecentBinariesRPCResponse } from '../rpc_types';
import '../../../infra-sk/modules/human-date-sk';

export class IndexPageSk extends ElementSk {
  private static template = (el: IndexPageSk) => html`
    <h2>Most recent code size statistics</h2>

    ${el.mostRecentBinaries === null
    ? html`<p>Loading...</p>`
    : el.mostRecentBinaries.map(IndexPageSk.binariesFromCommitOrPatchsetTemplate)}
  `

  private static binariesFromCommitOrPatchsetTemplate =
    (binariesFromCommitOrPatchset: BinariesFromCommitOrPatchset) => {
      // The metadata fields we look at should be the same for all binaries associated with this
      // commit or patchset, so we pick an arbitrary one.
      const metadata = binariesFromCommitOrPatchset.binaries[0].metadata;

      const isTryJob = metadata.patch_issue || metadata.patch_set;
      const hasDiff = isTryJob && metadata.bloaty_diff_args;

      const commitOrCLAnchorText = isTryJob
        ? `Issue ${metadata.patch_issue}, PS ${metadata.patch_set}`
        : metadata.revision.substring(0, 7);
      const commitOrCLAnchorHref = isTryJob
        ? `https://review.skia.org/${metadata.patch_issue}/${metadata.patch_set}`
        : `https://skia.googlesource.com/skia/+/${metadata.revision}`;

      const author = binariesFromCommitOrPatchset.binaries[0].metadata.author;
      const subject = binariesFromCommitOrPatchset.binaries[0].metadata.subject;
      const timestamp = binariesFromCommitOrPatchset.binaries[0].metadata.timestamp;

      // Sort the Bloaty outputs to ensure a deterministic presentation.
      binariesFromCommitOrPatchset.binaries.sort(
        (a: Binary, b: Binary) => ((a.metadata.binary_name < b.metadata.binary_name
            || (a.metadata.binary_name === b.metadata.binary_name
                && a.metadata.compile_task_name < b.metadata.compile_task_name)) ? -1 : 1),
      );

      const hrefForBinary = (output: Binary) => {
        const params: Record<string, string> = {
          binary_name: output.metadata.binary_name,
          compile_task_name: output.metadata.compile_task_name,
        };
        if (isTryJob) {
          params.patch_issue = output.metadata.patch_issue;
          params.patch_set = output.metadata.patch_set;
        } else {
          params.commit = output.metadata.revision;
        }
        return `/binary?${new URLSearchParams(params).toString()}`;
      };

      // Only available for tryjobs.
      const hrefForBinaryDiff = (output: Binary) => {
        const params: Record<string, string> = {
          binary_name: output.metadata.binary_name,
          compile_task_name: output.metadata.compile_task_name,
          patch_issue: output.metadata.patch_issue,
          patch_set: output.metadata.patch_set,
        }
        return `/binary_diff?${new URLSearchParams(params).toString()}`;
      };

      return html`
      <div class="commit-or-cl">
        <p>
          <a href="${commitOrCLAnchorHref}">${commitOrCLAnchorText}</a>
          ${subject}
          <br/>
          <span class="author-and-timestamp">
            ${author}, <human-date-sk .date=${timestamp} .diff=${true}></human-date-sk> ago.
          </span>
        </p>
        <p class="binaries">Binaries:</p>
        <ul>
          ${binariesFromCommitOrPatchset.binaries.map((output) => html`
            <li>
              <a href="${hrefForBinary(output)}">${output.metadata.binary_name}</a>
              <a href="https://task-scheduler.skia.org/task/${output.metadata.task_id}"
                 class="compile-task">
                ${output.metadata.compile_task_name}
              </a>
              ${hasDiff ?
                html`<a href="${hrefForBinaryDiff(output)}" class="size-diff">Size Diff</a>` : ''}
            </li>
          `)}
        </ul>
      </div>
    `;
    };

  private mostRecentBinaries: BinariesFromCommitOrPatchset[] | null = null;

  constructor() {
    super(IndexPageSk.template);
  }

  connectedCallback(): void {
    super.connectedCallback();
    this._render();
    this.loadBinaries();
  }

  private async loadBinaries(): Promise<void> {
    // Show a loading indicator while waiting for the RPC to complete.
    const res = await CodesizeScaffoldSk.waitFor(
      fetch('/rpc/most_recent_binaries/v1')
        .then(jsonOrThrow)
        .then((r: MostRecentBinariesRPCResponse) => r),
    );
    this.mostRecentBinaries = res.binaries;
    this._render();
  }
}
define('index-page-sk', IndexPageSk);