const PRAYERS = [
  ["imsak", "Imsak"],
  ["subuh", "Subuh"],
  ["terbit", "Terbit"],
  ["dhuha", "Dhuha"],
  ["dzuhur", "Dzuhur"],
  ["ashar", "Ashar"],
  ["maghrib", "Maghrib"],
  ["isya", "Isya"],
];

function passContext(ctx) {
  if (ctx?.context != null && typeof ctx.context === "object" && !Array.isArray(ctx.context)) {
    return { ...ctx.context };
  }
  return {};
}

function unwrapScalar(value) {
  if (value == null) return "";
  if (typeof value === "string") return value.trim();
  if (typeof value === "number" || typeof value === "boolean") return String(value);
  return "";
}

function requireDay(day, label) {
  if (day == null || typeof day !== "object" || Array.isArray(day)) {
    throw new Error(
      `parser: missing ${label} prayer-time data (run plugin/jakarta-prayer-time-today-and-tomorrow first)`,
    );
  }
  return day;
}

function dayCaption(day, fallbackDate) {
  const tanggal = unwrapScalar(day.tanggal);
  if (tanggal) return tanggal;
  return unwrapScalar(fallbackDate);
}

function formatDayTable(heading, day) {
  const lines = [
    `### ${heading}`,
    "",
    "| Prayer | Time |",
    "| --- | --- |",
  ];
  for (const [key, label] of PRAYERS) {
    const time = unwrapScalar(day[key]) || "—";
    lines.push(`| ${label} | ${time} |`);
  }
  return lines.join("\n");
}

async function parsePrayerTimesForNtfy(ctx) {
  const data = ctx?.data && typeof ctx.data === "object" ? ctx.data : {};
  const today = requireDay(data.today, "today");
  const tomorrow = requireDay(data.tomorrow, "tomorrow");
  const location = unwrapScalar(ctx.config?.location) || "Jakarta";

  const todayCaption = dayCaption(today, data.todayDate);
  const tomorrowCaption = dayCaption(tomorrow, data.tomorrowDate);

  const todayHeading = todayCaption ? `Today — ${todayCaption}` : "Today";
  const tomorrowHeading = tomorrowCaption
    ? `Tomorrow — ${tomorrowCaption}`
    : "Tomorrow";

  const message = [
    formatDayTable(todayHeading, today),
    "",
    "---",
    "",
    formatDayTable(tomorrowHeading, tomorrow),
  ].join("\n");

  const title = todayCaption
    ? `Prayer Times (${location}): ${todayCaption}`
    : `Prayer Times (${location})`;

  log.info(
    { location, todayCaption, tomorrowCaption },
    "jakarta-prayer-time-parser-for-ntfy: formatted",
  );

  const output = { ok: true, title, message };
  return { output, context: { ...passContext(ctx), ...output } };
}

parsePrayerTimesForNtfy.meta = {
  description:
    "Format today/tomorrow prayer times as ntfy Markdown (headings + tables). Set ntfy.js config.markdown to true.",
  previewConfigKey: "location",
  tags: ["ntfy", "Markdown", "Prayer Times"],
  config: {
    location: {
      type: "string",
      default: "Jakarta",
      description: "City name used in the ntfy title",
    },
  },
  input: {
    today: {
      type: "any",
      required: true,
      description: "Today's prayer-time record from the fetcher",
    },
    tomorrow: {
      type: "any",
      required: true,
      description: "Tomorrow's prayer-time record from the fetcher",
    },
    todayDate: {
      type: "string",
      required: false,
      description: "YYYY-MM-DD fallback when today.tanggal is missing",
    },
    tomorrowDate: {
      type: "string",
      required: false,
      description: "YYYY-MM-DD fallback when tomorrow.tanggal is missing",
    },
  },
  output: {
    ok: { type: "boolean" },
    title: { type: "string", description: "ntfy Title header" },
    message: { type: "string", description: "Markdown body (headings + tables)" },
  },
  context: {
    ok: { type: "boolean" },
    title: { type: "string" },
    message: { type: "string" },
  },
  example: {
    data: {
      todayDate: "2026-08-30",
      tomorrowDate: "2026-08-31",
      today: {
        tanggal: "Minggu, 30/08/2026",
        imsak: "04:32",
        subuh: "04:42",
        terbit: "05:57",
        dhuha: "06:26",
        dzuhur: "11:58",
        ashar: "15:18",
        maghrib: "17:58",
        isya: "19:08",
      },
      tomorrow: {
        tanggal: "Senin, 31/08/2026",
        imsak: "04:32",
        subuh: "04:42",
        terbit: "05:57",
        dhuha: "06:26",
        dzuhur: "11:58",
        ashar: "15:17",
        maghrib: "17:58",
        isya: "19:08",
      },
    },
    config: { location: "Jakarta" },
  },
};

export default parsePrayerTimesForNtfy;