const test = require("node:test");
const assert = require("node:assert/strict");
const {
  ELIGIBILITY_REASONS,
  evaluateEntryEligibility,
  resolveEntrySettings,
} = require("../src/lifecycle");

const NOW = Date.parse("2035-05-06T07:08:09.000Z");

function readyAsset(overrides = {}) {
  return { status: "ready", expiration_at: null, ...overrides };
}

function enabledEntry(overrides = {}) {
  return {
    enabled: 1,
    schedule_start_at: null,
    schedule_end_at: null,
    ...overrides,
  };
}

test("an enabled, ready, permanent, unscheduled entry is playable", () => {
  assert.deepEqual(
    evaluateEntryEligibility(enabledEntry(), readyAsset(), NOW),
    { playable: true, reason: null },
  );
});

test("disabled entries are not playable", () => {
  assert.deepEqual(
    evaluateEntryEligibility(enabledEntry({ enabled: 0 }), readyAsset(), NOW),
    { playable: false, reason: ELIGIBILITY_REASONS.DISABLED },
  );
});

test("schedule start is inclusive", () => {
  const entry = enabledEntry({ schedule_start_at: NOW });

  assert.deepEqual(evaluateEntryEligibility(entry, readyAsset(), NOW - 1), {
    playable: false,
    reason: ELIGIBILITY_REASONS.SCHEDULED_FUTURE,
  });
  assert.deepEqual(evaluateEntryEligibility(entry, readyAsset(), NOW), {
    playable: true,
    reason: null,
  });
});

test("schedule end is exclusive", () => {
  const entry = enabledEntry({ schedule_end_at: NOW });

  assert.deepEqual(evaluateEntryEligibility(entry, readyAsset(), NOW - 1), {
    playable: true,
    reason: null,
  });
  assert.deepEqual(evaluateEntryEligibility(entry, readyAsset(), NOW), {
    playable: false,
    reason: ELIGIBILITY_REASONS.SCHEDULED_ENDED,
  });
});

test("start-only, end-only, and bounded schedules use UTC epoch milliseconds", () => {
  assert.equal(
    evaluateEntryEligibility(
      enabledEntry({ schedule_start_at: NOW - 1 }),
      readyAsset(),
      NOW,
    ).playable,
    true,
  );
  assert.equal(
    evaluateEntryEligibility(
      enabledEntry({ schedule_end_at: NOW + 1 }),
      readyAsset(),
      NOW,
    ).playable,
    true,
  );
  assert.equal(
    evaluateEntryEligibility(
      enabledEntry({ schedule_start_at: NOW, schedule_end_at: NOW + 1 }),
      readyAsset(),
      NOW,
    ).playable,
    true,
  );
});

test("only ready assets are playable", () => {
  for (const status of ["processing", "failed", "deleting"]) {
    assert.deepEqual(
      evaluateEntryEligibility(enabledEntry(), readyAsset({ status }), NOW),
      { playable: false, reason: ELIGIBILITY_REASONS.ASSET_NOT_READY },
    );
  }
});

test("permanent assets stay playable and expiration is exclusive", () => {
  assert.equal(
    evaluateEntryEligibility(enabledEntry(), readyAsset(), NOW).playable,
    true,
  );
  assert.equal(
    evaluateEntryEligibility(
      enabledEntry(),
      readyAsset({ expiration_at: NOW + 1 }),
      NOW,
    ).playable,
    true,
  );
  assert.deepEqual(
    evaluateEntryEligibility(
      enabledEntry(),
      readyAsset({ expiration_at: NOW }),
      NOW,
    ),
    { playable: false, reason: ELIGIBILITY_REASONS.ASSET_EXPIRED },
  );
});

test("not-playable reasons follow the documented precedence", () => {
  const asset = readyAsset({ status: "failed", expiration_at: NOW });

  assert.equal(
    evaluateEntryEligibility(
      enabledEntry({ enabled: 0, schedule_start_at: NOW + 1 }),
      asset,
      NOW,
    ).reason,
    ELIGIBILITY_REASONS.DISABLED,
  );
  assert.equal(
    evaluateEntryEligibility(
      enabledEntry({ schedule_start_at: NOW + 1, schedule_end_at: NOW }),
      asset,
      NOW,
    ).reason,
    ELIGIBILITY_REASONS.SCHEDULED_FUTURE,
  );
  assert.equal(
    evaluateEntryEligibility(enabledEntry({ schedule_end_at: NOW }), asset, NOW)
      .reason,
    ELIGIBILITY_REASONS.SCHEDULED_ENDED,
  );
  assert.equal(
    evaluateEntryEligibility(enabledEntry(), asset, NOW).reason,
    ELIGIBILITY_REASONS.ASSET_NOT_READY,
  );
});

test("mapped camel-case domain values are supported", () => {
  assert.deepEqual(
    evaluateEntryEligibility(
      { enabled: true, scheduleStartAt: NOW, scheduleEndAt: NOW + 1 },
      { status: "ready", expirationAt: NOW + 1 },
      NOW,
    ),
    { playable: true, reason: null },
  );
});

test("eligibility rejects invalid evaluation clocks", () => {
  for (const invalid of [-1, 1.5, Number.MAX_SAFE_INTEGER + 1, "2035-01-01"]) {
    assert.throws(
      () => evaluateEntryEligibility(enabledEntry(), readyAsset(), invalid),
      /nowMs must be a non-negative, safe epoch-millisecond integer/,
    );
  }
});

test("resolved settings inherit global duration and presentation", () => {
  const settings = {
    default_duration_ms: 7_000,
    default_background_mode: "blurred",
    default_solid_background_color: "#123456",
    default_background_darkened: 1,
    default_blur_px: 20,
  };

  assert.deepEqual(resolveEntrySettings({}, settings), {
    durationMs: 7_000,
    presentation: {
      backgroundMode: "blurred",
      backgroundColor: "#123456",
      backgroundDarkened: true,
      blurPx: 20,
    },
  });
});

test("entry overrides are independent and blur always remains global", () => {
  const settings = {
    defaultDurationMs: 7_000,
    defaultBackgroundMode: "blurred",
    defaultSolidBackgroundColor: "#123456",
    defaultBackgroundDarkened: true,
    defaultBlurPx: 20,
  };
  const entry = {
    durationOverrideMs: 9_000,
    backgroundModeOverride: "solid",
    backgroundColorOverride: "#abcdef",
    backgroundDarkenedOverride: false,
    blurPx: 999,
  };

  assert.deepEqual(resolveEntrySettings(entry, settings), {
    durationMs: 9_000,
    presentation: {
      backgroundMode: "solid",
      backgroundColor: "#abcdef",
      backgroundDarkened: false,
      blurPx: 20,
    },
  });
});