// Diffusion in the editor, without VS Code (oxygenhub-vscode#5): how a pin

// between an upstream and its consumer looks. The hub's pill has two halves,

// the upstream's state and the consumer's; a tree row has one icon, so it

// shows the more urgent of the two and says both in words.

import type { DiffusionHalf, DiffusionPin } from "./hubapi";

/** A codicon and a theme colour id. */

export interface Look {

  icon: string;

  color: string;

}

/** Most urgent first: a failure, then what nothing checked, then waiting. */

const URGENCY = ["red", "amber", "grey", "green", "off"];

/** The tone a row shows: the more urgent half, ignoring a consumer that does not follow. */

export function tone(pin: DiffusionPin): string {

  const tones = [pin.upstream_state.tone, pin.consumer_state.tone].filter((t) => t !== "off");

  return tones.sort((a, b) => rank(a) - rank(b))[0] ?? "off";

}

function rank(t: string): number {

  const i = URGENCY.indexOf(t);

  return i < 0 ? URGENCY.length : i;

}

export function look(t: string): Look {

  switch (t) {

    case "green":

      return { icon: "pass-filled", color: "testing.iconPassed" };

    case "red":

      return { icon: "error", color: "testing.iconFailed" };

    case "amber":

      return { icon: "warning", color: "list.warningForeground" };

    case "grey":

      return { icon: "clock", color: "testing.iconQueued" };

    default:

      return { icon: "circle-outline", color: "disabledForeground" };

  }

}

/** The row's name: the repository on the other end of the pin. */

export function pinLabel(pin: DiffusionPin, side: "takes" | "gives"): string {

  return side === "takes" ? pin.upstream : pin.consumer;

}

/** "untested │ passes · 2 behind · bump #304", as the hub's pill reads. */

export function pinDescription(pin: DiffusionPin): string {

  const parts = [`${pin.upstream_state.word} │ ${pin.consumer_state.word}`];

  if (pin.behind !== null && pin.behind !== undefined && pin.behind > 0) {

    parts.push(`${pin.behind} behind`);

  }

  if (pin.bump !== null && pin.bump !== undefined) {

    parts.push(`bump #${pin.bump}`);

  }

  return parts.join(" · ");

}

const FOLLOW: Record<string, string> = { off: "does not follow", green: "follows when the upstream is green", any: "follows every move" };

/** The tooltip, in Markdown: both halves' sentences, then the pin. */

export function pinTooltip(pin: DiffusionPin): string {

  const half = (who: string, h: DiffusionHalf) => `**${who}: ${h.word}.** ${h.title}`;

  const run = pin.run !== null && pin.run !== undefined ? ` · run #${pin.run}${pin.run_status ? ` ${pin.run_status}` : ""}` : "";

  return [

    half(pin.upstream, pin.upstream_state),

    half(pin.consumer, pin.consumer_state),

    `Pinned at \`${pin.path}\` on \`${pin.bookmark}\`; ${pin.consumer} ${FOLLOW[pin.follow] ?? pin.follow}.${pin.bump !== null && pin.bump !== undefined ? ` Open bump #${pin.bump}${run}.` : ""}`,

  ].join("\n\n");

}