import { createServer } from 'vite';

const expectedOpeningPageIds = ['yellow-turban-chaos', 'liu-bei-resolve'];
const expectedDeparturePageIds = [
  'first-sortie',
  'yellow-turban-nearby',
  'first-battle-plan-talk',
  'battle-briefing'
];
const expectedRequiredObjectiveIds = [
  'meet-zhang-fei',
  'meet-guan-yu',
  'check-supplies'
];
const expectedCampaignMarkerIds = [
  'prologue-village-entered',
  'prologue-village-meet-zhang-fei',
  'prologue-village-meet-guan-yu',
  'prologue-village-check-supplies',
  'prologue-village-complete'
];

const server = await createServer({
  logLevel: 'error',
  server: { middlewareMode: true },
  appType: 'custom'
});

try {
  const village = await server.ssrLoadModule('/src/game/data/prologueVillage.ts');
  const campaign = await server.ssrLoadModule('/src/game/state/campaignState.ts');
  const unitAssets = await server.ssrLoadModule('/src/game/data/unitAssets.ts');
  const failures = [];

  const openingPages = village.prologueOpeningPages();
  const departurePages = village.prologueDeparturePages();
  assertArrayEquals(
    openingPages.map((page) => page.id),
    expectedOpeningPageIds,
    'opening story page order',
    failures
  );
  assertArrayEquals(
    departurePages.map((page) => page.id),
    expectedDeparturePageIds,
    'departure story page order',
    failures
  );
  assertArrayEquals(
    [...village.prologueVillageRequiredObjectiveIds],
    expectedRequiredObjectiveIds,
    'required objective order',
    failures
  );

  const objectives = village.prologueVillageObjectiveDefinitions;
  assert(objectives.length === 4, `expected 4 objective rows, received ${objectives.length}`, failures);
  assert(
    new Set(objectives.map((objective) => objective.id)).size === objectives.length,
    'objective ids must be unique',
    failures
  );
  assert(
    objectives.at(-1)?.id === 'make-oath',
    'the final objective must be make-oath',
    failures
  );

  const npcs = village.prologueVillageNpcDefinitions;
  const objectiveNpcIds = npcs
    .filter((npc) => npc.objectiveId)
    .map((npc) => npc.objectiveId);
  assertArrayEquals(
    [...objectiveNpcIds].sort(),
    [...expectedRequiredObjectiveIds].sort(),
    'required NPC objective coverage',
    failures
  );
  assert(
    new Set(npcs.map((npc) => npc.id)).size === npcs.length,
    'NPC ids must be unique',
    failures
  );
  assert(npcs.some((npc) => !npc.objectiveId), 'at least one optional villager should be available', failures);

  for (const npc of npcs) {
    assert(
      Number.isFinite(npc.x) && npc.x >= 70 && npc.x <= 1435 &&
        Number.isFinite(npc.y) && npc.y >= 130 && npc.y <= 900,
      `${npc.id}: position must remain inside the FHD village play area`,
      failures
    );
    assert(unitAssets.hasUnitSheetAsset(npc.textureKey), `${npc.id}: missing ${npc.textureKey}`, failures);
    assert(Array.isArray(npc.dialogue) && npc.dialogue.length > 0, `${npc.id}: dialogue is required`, failures);
    for (const [lineIndex, line] of npc.dialogue.entries()) {
      assert(
        typeof line.speaker === 'string' && line.speaker.trim().length > 0,
        `${npc.id}[${lineIndex}]: speaker is required`,
        failures
      );
      assert(
        typeof line.text === 'string' && line.text.trim().length >= 8 && line.text.length <= 180,
        `${npc.id}[${lineIndex}]: dialogue must be 8-180 characters`,
        failures
      );
      if (line.textureKey) {
        assert(
          unitAssets.hasUnitSheetAsset(line.textureKey),
          `${npc.id}[${lineIndex}]: missing dialogue sprite ${line.textureKey}`,
          failures
        );
      }
    }
  }

  assert(
    unitAssets.hasUnitSheetAsset('unit-liu-bei'),
    'the controllable Liu Bei base sheet is required',
    failures
  );
  assertArrayEquals(
    Object.values(campaign.prologueVillageCampaignTutorialIds),
    expectedCampaignMarkerIds,
    'campaign progress marker ids',
    failures
  );
  assert(
    expectedCampaignMarkerIds.every((id) => campaign.campaignTutorialIds.includes(id)),
    'every village marker must survive campaign save normalization',
    failures
  );

  if (failures.length > 0) {
    throw new Error(
      `Prologue village data verification failed with ${failures.length} issue(s):\n` +
        failures.map((failure) => `- ${failure}`).join('\n')
    );
  }

  console.log(
    `Verified ${npcs.length} village NPCs, ${expectedRequiredObjectiveIds.length} required interactions, ` +
      `${openingPages.length} opening pages, ${departurePages.length} departure pages, and save markers.`
  );
} finally {
  await server.close();
}

function assert(condition, message, failures) {
  if (!condition) {
    failures.push(message);
  }
}

function assertArrayEquals(actual, expected, label, failures) {
  assert(
    JSON.stringify(actual) === JSON.stringify(expected),
    `${label}: expected [${expected.join(', ')}], received [${actual.join(', ')}]`,
    failures
  );
}