import { describe, expect, test } from "bun:test";
import { adapterById } from "../../src/ingest/adapters/index.ts";
import type { Adapter } from "../../src/ingest/adapters/types.ts";
import { inferType } from "../../src/ingest/parsers/game8.ts";
import { GachaEvent, type EventType } from "../../src/shared/schema.ts";

/**
 * Pinned clock. Parsers take `now` from context and never read it themselves,
 * so a fixture captured months ago still asserts byte-identical output.
 */
const NOW = "2026-08-14T00:00:00.000Z";

function adapter(id: string): Adapter {
  const found = adapterById(id);
  if (found === undefined) throw new Error(`no adapter '${id}'`);
  return found;
}

const genshinGame8 = adapter("genshin-game8-events");
const nteGame8 = adapter("nte-game8-events");

const CASES: Array<{ adapter: Adapter; fixture: string }> = [
  { adapter: genshinGame8, fixture: "fixtures/genshin/game8-events-2026-08-14" },
  { adapter: nteGame8, fixture: "fixtures/nte/game8-events-2026-08-14" },
  { adapter: adapter("hsr-game8-events"), fixture: "fixtures/hsr/game8-events-2026-08-14" },
  { adapter: adapter("wuwa-game8-events"), fixture: "fixtures/wuwa/game8-events-2026-08-14" },
  { adapter: adapter("zzz-game8-events"), fixture: "fixtures/zzz/game8-events-2026-08-14" },
  { adapter: adapter("endfield-game8-events"), fixture: "fixtures/endfield/game8-events-2026-08-14" },
  { adapter: adapter("endfield-wikigg-events"), fixture: "fixtures/endfield/wikigg-events-2026-08-14" },
];

async function runAdapter(adapter: Adapter, fixture: string) {
  const html = await Bun.file(`${fixture}.html`).text();
  return adapter.parse(html, {
    now: NOW,
    sourceUrl: adapter.url,
    sourceId: adapter.id,
    game: adapter.game,
  });
}

describe.each(CASES)("$adapter.id", ({ adapter, fixture }) => {
  test("matches the checked-in expected output", async () => {
    const events = await runAdapter(adapter, fixture);
    const expected = await Bun.file(`${fixture}.expected.json`).json();
    expect(events).toEqual(expected);
  });

  test("every event satisfies the schema", async () => {
    for (const event of await runAdapter(adapter, fixture)) {
      expect(() => GachaEvent.parse(event)).not.toThrow();
    }
  });

  test("is deterministic across runs", async () => {
    const a = await runAdapter(adapter, fixture);
    const b = await runAdapter(adapter, fixture);
    expect(a).toEqual(b);
  });

  test("never emits an end before its start", async () => {
    for (const e of await runAdapter(adapter, fixture)) {
      if (e.endsAt !== null) expect(e.endsAt > e.startsAt).toBe(true);
    }
  });

  test("no event runs longer than 180 days", async () => {
    // Patch cycles are ~6 weeks. A longer span means a misread year, which is
    // the failure mode most likely to reach a user as a confident wrong date.
    for (const e of await runAdapter(adapter, fixture)) {
      if (e.endsAt === null) continue;
      const days =
        (Date.parse(e.endsAt) - Date.parse(e.startsAt)) / 86_400_000;
      expect(days).toBeLessThanOrEqual(180);
    }
  });

  test("event IDs are unique and stable in shape", async () => {
    const events = await runAdapter(adapter, fixture);
    const ids = events.map((e) => e.id);
    expect(new Set(ids).size).toBe(ids.length);
    for (const e of events) {
      expect(e.id).toBe(
        `${e.game}:${e.id.split(":")[1]}:${e.startsAt.slice(0, 10)}`,
      );
    }
  });

  test("excludes permanent and past sections", async () => {
    const titles = (await runAdapter(adapter, fixture)).map((e) => e.title);
    // Permanent entries carry no dates; past entries ended before the fixture
    // date. Neither belongs on a "what's live / what's next" calendar.
    for (const t of titles) expect(t).not.toMatch(/permanent/i);
  });
});

describe("genshin fixture specifics", () => {
  test("yields the nine dated events on the page", async () => {
    const events = await runAdapter(
      genshinGame8,
      "fixtures/genshin/game8-events-2026-08-14",
    );
    expect(events).toHaveLength(9);

    const byTitle = new Map(events.map((e) => [e.title, e]));
    const mutual = byTitle.get("Mutual Aid in Bloom: Into the Frostlands");
    expect(mutual?.startsAt).toBe("2026-08-12T00:00:00.000Z");
    expect(mutual?.endsAt).toBe("2026-08-24T00:00:00.000Z");
    expect(mutual?.startPrecision).toBe("day");

    // Sourced from a one-cell "Availability Period" range rather than
    // Start/End rows — the other table shape on the same page.
    expect(byTitle.get("Battle Pass - Frostfarer")?.endsAt).toBe(
      "2026-09-21T00:00:00.000Z",
    );
  });

  test("year-less summary rows produce no events", async () => {
    // The page's summary tables show "08/12 - 08/24" with no year. Those must
    // be skipped, not year-guessed — and they must not duplicate the detail
    // tables that carry the same events with real years.
    const events = await runAdapter(
      genshinGame8,
      "fixtures/genshin/game8-events-2026-08-14",
    );
    const dupes = events.filter(
      (e) => e.title === "Mutual Aid in Bloom: Into the Frostlands",
    );
    expect(dupes).toHaveLength(1);
  });
});

describe("nte fixture specifics", () => {
  test("yields current and upcoming events only", async () => {
    const events = await runAdapter(
      nteGame8,
      "fixtures/nte/game8-events-2026-08-14",
    );
    expect(events).toHaveLength(13); // 9 current + 4 upcoming

    const titles = events.map((e) => e.title);
    expect(titles).toContain("Market Opening Rehearsal"); // current
    expect(titles).toContain("Fons Rush"); // upcoming
    expect(titles).not.toContain("Login Gift"); // permanent
    expect(titles).not.toContain("Tiger Perks"); // previous
  });

  test("carries the summary column through", async () => {
    const events = await runAdapter(
      nteGame8,
      "fixtures/nte/game8-events-2026-08-14",
    );
    const circleGift = events.find((e) => e.title === "Circle Gift");
    expect(circleGift?.summary).toContain("Log in");
  });
});

describe("inferType", () => {
  const cases: Array<[string, EventType]> = [
    ["Overflowing Abundance Rerun", "rerun"],
    ["Stygian Onslaught", "challenge"],
    ["Character Test Runs", "challenge"],
    ["Gold Clash", "challenge"],
    ["Seize the Day Login Bonus", "login"],
    ["Epitome Invocation Banner", "banner"],
    ["Mutual Aid in Bloom: Into the Frostlands", "other"],
  ];
  test.each(cases)("%s → %s", (title, expected) => {
    expect(inferType(title)).toBe(expected);
  });
});

describe("new source shapes", () => {
  test("zzz recovers events from rowspan Start/End rows", async () => {
    // The event name spans two rows, so a flat cell reader sees
    // [title, "Start", date] then ["End", date]. Losing the pairing would
    // silently halve the calendar.
    const events = await runAdapter(
      adapter("zzz-game8-events"),
      "fixtures/zzz/game8-events-2026-08-14",
    );
    const summer = events.find((e) => e.title === "Summer Waves Rolls In");
    expect(summer?.startsAt).toBe("2026-07-29T00:00:00.000Z");
    expect(summer?.endsAt).toBe("2026-09-07T00:00:00.000Z");
    expect(events.every((e) => e.endsAt !== null)).toBe(true);
  });

  test("hsr keeps events whose end is not announced", async () => {
    // "Jul. 24, 2026 - End of 4.6" has a real start and no knowable end.
    // Publishing it with a guessed end would be the worst possible outcome.
    const events = await runAdapter(
      adapter("hsr-game8-events"),
      "fixtures/hsr/game8-events-2026-08-14",
    );
    const open = events.filter((e) => e.endsAt === null);
    expect(open.length).toBeGreaterThan(0);
    for (const e of open) expect(e.endPrecision).toBe("unknown");
  });

  test("wuwa parses ranges carrying a year on both sides", async () => {
    const events = await runAdapter(
      adapter("wuwa-game8-events"),
      "fixtures/wuwa/game8-events-2026-08-14",
    );
    const jade = events.find((e) => e.title === "In Search of Lost Jade");
    expect(jade?.startsAt).toBe("2026-07-30T00:00:00.000Z");
    expect(jade?.endsAt).toBe("2026-08-13T00:00:00.000Z");
  });
});

describe("endfield", () => {
  test("reads MM/DD/YY ranges from a combined schedule cell", async () => {
    // This page hides its only dated events in an "Event | Schedule & Summary"
    // table, where one cell holds the label, the range and the blurb.
    const events = await runAdapter(
      adapter("endfield-game8-events"),
      "fixtures/endfield/game8-events-2026-08-14",
    );
    expect(events).toHaveLength(2);
    const rooted = events.find((e) => e.title === "The Rooted Realm");
    expect(rooted?.startsAt).toBe("2026-08-09T00:00:00.000Z");
    expect(rooted?.endsAt).toBe("2026-08-30T00:00:00.000Z");
    // The prose after the dates becomes the blurb, without the label.
    expect(rooted?.summary).not.toBeNull();
    expect(rooted?.summary).not.toMatch(/^Period:/);
  });
});

describe("wiki.gg parser", () => {
  test("reads exact per-region timers", async () => {
    // The first source that states region-scoped ends. Asia and the Americas
    // differ by hours, which is precisely what regionEnds exists to carry.
    const events = await runAdapter(
      adapter("endfield-wikigg-events"),
      "fixtures/endfield/wikigg-events-2026-08-14",
    );
    expect(events).toHaveLength(6);

    const heat = events.find((e) => e.title === "HEAT RAGE! MEGA ARENA!");
    expect(heat?.startPrecision).toBe("exact");
    expect(heat?.regionScoped).toBe(true);
    expect(heat?.regionEnds?.asia).toBe("2026-08-12T20:00:00.000Z");
    expect(heat?.regionEnds?.america).toBe("2026-08-13T09:00:00.000Z");
    // endsAt is the fallback for a region the source did not list, so it takes
    // the earliest — never promise more time than some region actually gets.
    expect(heat?.endsAt).toBe("2026-08-12T20:00:00.000Z");
  });

  test("links each event to its own wiki page", async () => {
    const events = await runAdapter(
      adapter("endfield-wikigg-events"),
      "fixtures/endfield/wikigg-events-2026-08-14",
    );
    for (const e of events) {
      expect(e.sourceUrl).toStartWith("https://endfield.wiki.gg/wiki/");
    }
  });
});