// The transparency log's lines in the Trust view (spec §5.12): what

// `oxy tlog verify --json` proved, who cosigned it, or why it failed. No

// vscode imports, so it is tested with plain Node.

import { TlogInfo } from "./oxy";

/** The last check of a repository's hub log: its result or its error. */

export type TlogCheck = { info: TlogInfo; when_ms: number } | { error: string; when_ms: number };

export interface TlogLine {

  label: string;

  description?: string;

  tooltip?: string;

  icon: string;

}

/** The Trust view's lines for a log check; `ago` words a time (milliseconds since the epoch). */

export function tlogLines(check: TlogCheck | undefined, ago: (ms: number) => string): TlogLine[] {

  if (!check) {

    return [{ label: "Transparency log not checked", description: "click to verify the hub's log", icon: "shield", tooltip: "Runs oxy tlog verify: checks that the hub shows everyone the same history." }];

  }

  if ("error" in check) {

    const first = check.error.trim().split("\n")[0] || "oxy tlog verify failed";

    return [{ label: "Transparency log NOT verified", description: first, icon: "error", tooltip: check.error.trim() }];

  }

  const { info } = check;

  const mine = info.entries.length;

  const lines: TlogLine[] = [

    {

      label: `Transparency log verified up to checkpoint ${info.size}`,

      description: `${info.origin} · ${mine} entr${mine === 1 ? "y" : "ies"} for this repository · ${ago(check.when_ms)}`,

      icon: "verified",

      tooltip: `${info.hub}\nRoot ${info.root}\nEvery entry checks against the root its log key signed, and the log extends what you saw before.`,

    },

  ];

  if (info.witnesses.length === 0) {

    lines.push({ label: "Cosigned by no witness you trust", icon: "warning", tooltip: "Without a witness, only your own past checks show the hub has not forked its log." });

  } else {

    for (const w of info.witnesses) {

      lines.push({ label: `Cosigned by ${w.name}`, description: ago(w.time_ms), icon: "key" });

    }

  }

  return lines;

}