import { createServer } from 'vite';

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

try {
  const { battleScenarios } = await server.ssrLoadModule('/src/game/data/battles.ts');
  const { terrainRules, unitClasses } = await server.ssrLoadModule('/src/game/data/battleRules.ts');
  const {
    buildSortieRecommendationPlans,
    sortieRecommendationPlanIds
  } = await server.ssrLoadModule('/src/game/data/sortieRecommendations.ts');
  const { sortieFormationRoles } = await server.ssrLoadModule('/src/game/data/sortieDeployment.ts');
  const { sortieOrderIds } = await server.ssrLoadModule('/src/game/data/sortieOrders.ts');

  assert(
    JSON.stringify(sortieRecommendationPlanIds) === JSON.stringify(['order', 'resonance', 'terrain-strategy']),
    `Expected the three recommendation profiles to retain their stable order: ${JSON.stringify(sortieRecommendationPlanIds)}`
  );

  const scenarioEntries = Object.entries(battleScenarios);
  const formationRoles = new Set(sortieFormationRoles);
  const differentiatedProfileBattleIds = new Set();
  const differentiatedOrderBattleIds = new Set();
  let evaluatedPlanCount = 0;

  scenarioEntries.forEach(([battleId, scenario], battleIndex) => {
    assert(scenario.sortie, `${battleId}: expected sortie data before recommendation verification`);
    const profileSignaturesByOrder = new Map();
    const orderPlanSignatures = new Set();

    sortieOrderIds.forEach((orderId) => {
      const context = buildScenarioContext(scenario, orderId, terrainRules, unitClasses);
      const frozenInput = JSON.stringify(context);
      const plans = buildSortieRecommendationPlans(context);
      const repeated = buildSortieRecommendationPlans(context);

      assert(
        JSON.stringify(plans) === JSON.stringify(repeated),
        `${battleId}/${orderId}: repeated recommendation calculation must be deterministic`
      );
      assert(
        JSON.stringify(context) === frozenInput,
        `${battleId}/${orderId}: recommendation calculation must not mutate its context`
      );
      assert(
        JSON.stringify(plans.map((plan) => plan.id)) === JSON.stringify(sortieRecommendationPlanIds),
        `${battleId}/${orderId}: expected one plan for every stable recommendation id: ${JSON.stringify(plans)}`
      );

      plans.forEach((plan) => {
        validateApplicablePlan({
          plan,
          battleId,
          orderId,
          context,
          formationRoles,
          expectedCount: scenario.sortie.sortieLimit
        });
        evaluatedPlanCount += 1;
      });

      profileSignaturesByOrder.set(orderId, new Set(plans.map(planProjectionSignature)));
      orderPlanSignatures.add(planProjectionSignature(plans.find((plan) => plan.id === 'order')));
    });

    if ([...profileSignaturesByOrder.values()].some((signatures) => signatures.size > 1)) {
      differentiatedProfileBattleIds.add(battleId);
    }
    if (orderPlanSignatures.size > 1) {
      differentiatedOrderBattleIds.add(battleId);
    }

    const alliedCount = scenario.units.filter((unit) => unit.faction === 'ally').length;
    if (alliedCount <= scenario.sortie.sortieLimit) {
      assert(
        battleIndex < 15,
        `${battleId}: a no-choice roster unexpectedly appeared after the established first 15 battles`
      );
    }
  });

  assert(
    differentiatedProfileBattleIds.size > 0,
    'Expected at least one campaign battle to produce materially different profile projections.'
  );
  assert(
    differentiatedOrderBattleIds.size > 0,
    'Expected elite, mobile, and siege orders to change at least one order-profile projection.'
  );

  const fixtureScenario = battleScenarios['sixtieth-battle-wudu-yinping'];
  assert(fixtureScenario?.sortie, 'Expected the Wudu/Yinping battle to remain available as the broad-roster fixture.');
  const fixtureContext = buildScenarioContext(fixtureScenario, 'mobile', terrainRules, unitClasses);

  verifyRosterIndexDeterminism(fixtureContext, buildSortieRecommendationPlans);
  verifyStrongBondPairSeed(fixtureContext, buildSortieRecommendationPlans);
  verifyUnavailableOptionalCandidates(fixtureContext, buildSortieRecommendationPlans, formationRoles);
  verifyUnavailableRequiredCandidate(fixtureContext, buildSortieRecommendationPlans);
  verifyRequiredExcludedConflict(fixtureContext, buildSortieRecommendationPlans);
  verifyRequiredOverflow(fixtureContext, buildSortieRecommendationPlans);
  verifyDuplicateAndNonAllyCandidates(fixtureContext, buildSortieRecommendationPlans, formationRoles);
  verifyMissingOrderFallback(fixtureContext, buildSortieRecommendationPlans, formationRoles);

  console.log(
    `Verified ${evaluatedPlanCount} recommendation plans across ${scenarioEntries.length} battles and ${sortieOrderIds.length} orders; ` +
    `${differentiatedProfileBattleIds.size} battles vary by profile and ${differentiatedOrderBattleIds.size} vary by selected order, with synthetic availability, required, exclusion, duplicate, and fallback cases.`
  );
} finally {
  await server.close();
}

function buildScenarioContext(scenario, orderId, terrainRules, unitClasses) {
  const sortie = scenario.sortie;
  const excludedUnitIds = sortie.excludedUnits ?? [];
  const excluded = new Set(excludedUnitIds);
  const recommendationById = new Map(sortie.recommendedUnits.map((entry) => [entry.unitId, entry]));
  const candidates = scenario.units
    .filter((unit) => unit.faction === 'ally')
    .map((unit, rosterIndex) => ({
      unit,
      available: unit.hp > 0 && !excluded.has(unit.id),
      terrainScore: terrainScoreForUnit(unit, scenario, terrainRules, unitClasses),
      preferredRole: recommendationById.get(unit.id)?.role,
      rosterIndex
    }));

  return {
    battleId: scenario.id,
    maxUnits: sortie.sortieLimit,
    orderId,
    candidates,
    requiredUnitIds: sortie.requiredUnits,
    excludedUnitIds,
    recommendedUnits: sortie.recommendedUnits,
    recommendedClasses: sortie.recommendedClasses,
    bonds: scenario.bonds
  };
}

function terrainScoreForUnit(unit, scenario, terrainRules, unitClasses) {
  const counts = new Map();
  scenario.map.terrain.flat().forEach((terrain) => {
    if (terrainRules[terrain]?.passable !== false) {
      counts.set(terrain, (counts.get(terrain) ?? 0) + 1);
    }
  });
  const total = [...counts.values()].reduce((sum, count) => sum + count, 0);
  const ratings = unitClasses[unit.classKey]?.terrainRatings ?? {};
  return total > 0
    ? Math.round([...counts.entries()].reduce((sum, [terrain, count]) => sum + (ratings[terrain] ?? 0) * count, 0) / total)
    : 100;
}

function validateApplicablePlan({ plan, battleId, orderId, context, formationRoles, expectedCount }) {
  const candidateById = new Map(
    context.candidates
      .filter((candidate) => candidate.available !== false && candidate.unit.faction === 'ally' && candidate.unit.hp > 0)
      .filter((candidate) => !(context.excludedUnitIds ?? []).includes(candidate.unit.id))
      .map((candidate) => [candidate.unit.id, candidate])
  );
  const selected = new Set(plan.selectedUnitIds);
  const assignmentIds = Object.keys(plan.formationAssignments).sort();
  const selectedSorted = [...selected].sort();

  assert(plan.applicable === true, `${battleId}/${orderId}/${plan.id}: expected an applicable plan: ${JSON.stringify(plan)}`);
  assert(!plan.blockedReason, `${battleId}/${orderId}/${plan.id}: applicable plan must not have a blocked reason`);
  assert(
    plan.selectedUnitIds.length === expectedCount && selected.size === expectedCount,
    `${battleId}/${orderId}/${plan.id}: expected ${expectedCount} unique selected units: ${JSON.stringify(plan.selectedUnitIds)}`
  );
  assert(
    plan.selectedUnitIds.every((unitId) => candidateById.has(unitId)),
    `${battleId}/${orderId}/${plan.id}: selected an unavailable, excluded, injured, non-allied, or unknown unit: ${JSON.stringify(plan.selectedUnitIds)}`
  );
  assert(
    (context.requiredUnitIds ?? []).every((unitId) => selected.has(unitId)),
    `${battleId}/${orderId}/${plan.id}: omitted a required unit: ${JSON.stringify({ required: context.requiredUnitIds, selected: plan.selectedUnitIds })}`
  );
  assert(
    JSON.stringify(assignmentIds) === JSON.stringify(selectedSorted),
    `${battleId}/${orderId}/${plan.id}: formation assignments must match selected ids exactly: ${JSON.stringify(plan.formationAssignments)}`
  );
  assert(
    Object.values(plan.formationAssignments).every((role) => formationRoles.has(role)),
    `${battleId}/${orderId}/${plan.id}: formation contains an invalid role: ${JSON.stringify(plan.formationAssignments)}`
  );
  assert(
    Number.isInteger(plan.score) && plan.score >= 0 && plan.score <= 100,
    `${battleId}/${orderId}/${plan.id}: score must be an integer from 0 to 100: ${plan.score}`
  );
  assertNonEmptyText(plan.label, `${battleId}/${orderId}/${plan.id}: label`);
  assertNonEmptyText(plan.title, `${battleId}/${orderId}/${plan.id}: title`);
  assertNonEmptyText(plan.summary, `${battleId}/${orderId}/${plan.id}: summary`);
  assertNonEmptyText(plan.tradeoff, `${battleId}/${orderId}/${plan.id}: tradeoff`);
  assert(
    Array.isArray(plan.highlights) && plan.highlights.length >= 2 && plan.highlights.every(isNonEmptyText),
    `${battleId}/${orderId}/${plan.id}: expected at least two non-empty highlights: ${JSON.stringify(plan.highlights)}`
  );
  assert(
    JSON.stringify(Object.keys(plan.unitReasons).sort()) === JSON.stringify(selectedSorted) &&
      Object.values(plan.unitReasons).every(isNonEmptyText),
    `${battleId}/${orderId}/${plan.id}: expected one reason for every selected unit: ${JSON.stringify(plan.unitReasons)}`
  );
  validateMetrics(plan.metrics, orderId, `${battleId}/${orderId}/${plan.id}`);
}

function validateMetrics(metrics, orderId, context) {
  assert(metrics.orderId === orderId, `${context}: metrics must retain selected order ${orderId}: ${JSON.stringify(metrics)}`);
  assert(inRange(metrics.orderFit, 0, 100), `${context}: orderFit must be within 0..100: ${metrics.orderFit}`);
  assert(Number.isInteger(metrics.activeBondCount) && metrics.activeBondCount >= 0, `${context}: invalid active bond count`);
  assert(Number.isInteger(metrics.pursuitPairCount) && metrics.pursuitPairCount >= 0, `${context}: invalid pursuit pair count`);
  assert(Number.isFinite(metrics.terrainScore) && metrics.terrainScore > 0, `${context}: invalid terrain score ${metrics.terrainScore}`);
  assertNonEmptyText(metrics.terrainGrade, `${context}: terrain grade`);
  assert(
    Number.isInteger(metrics.strategyCoverageCount) &&
      Number.isInteger(metrics.strategyCoverageTotal) &&
      metrics.strategyCoverageCount >= 0 &&
      metrics.strategyCoverageCount <= metrics.strategyCoverageTotal,
    `${context}: invalid strategy coverage: ${JSON.stringify(metrics)}`
  );
  assert(
    metrics.coveredStrategyLabels.length === metrics.strategyCoverageCount &&
      metrics.coveredStrategyLabels.length + metrics.missingStrategyLabels.length === metrics.strategyCoverageTotal,
    `${context}: strategy labels must match coverage counts: ${JSON.stringify(metrics)}`
  );
  assert(Number.isInteger(metrics.roleCoverage) && inRange(metrics.roleCoverage, 0, 3), `${context}: invalid role coverage`);
  assert(inRange(metrics.recommendedClassCoverage, 0, 100), `${context}: invalid recommended-class coverage`);
}

function verifyUnavailableOptionalCandidates(base, buildPlans, formationRoles) {
  const required = new Set(base.requiredUnitIds);
  const optionalIds = base.candidates.filter((candidate) => !required.has(candidate.unit.id)).slice(0, 2).map((candidate) => candidate.unit.id);
  const [injuredId, excludedId] = optionalIds;
  assert(injuredId && excludedId, 'Expected two optional units for the availability fixture.');
  const context = {
    ...base,
    candidates: base.candidates.map((candidate) => candidate.unit.id === injuredId
      ? { ...candidate, unit: { ...candidate.unit, hp: 0 }, available: false, blockedReason: '부상' }
      : candidate),
    excludedUnitIds: [...(base.excludedUnitIds ?? []), excludedId]
  };
  buildPlans(context).forEach((plan) => {
    validateApplicablePlan({
      plan,
      battleId: 'fixture-optional-unavailable',
      orderId: base.orderId,
      context,
      formationRoles,
      expectedCount: base.maxUnits
    });
    assert(
      !plan.selectedUnitIds.includes(injuredId) && !plan.selectedUnitIds.includes(excludedId),
      `Optional injured/excluded units must be omitted: ${JSON.stringify(plan.selectedUnitIds)}`
    );
  });
}

function verifyRosterIndexDeterminism(base, buildPlans) {
  const forward = buildPlans(base);
  const reversedCandidates = {
    ...base,
    candidates: [...base.candidates].reverse()
  };
  const reversed = buildPlans(reversedCandidates);
  assert(
    JSON.stringify(reversed) === JSON.stringify(forward),
    `Explicit rosterIndex values must make recommendations independent of candidate array order: ${JSON.stringify({
      forward: forward.map(planProjectionSignature),
      reversed: reversed.map(planProjectionSignature)
    })}`
  );
}

function verifyStrongBondPairSeed(base, buildPlans) {
  const source = base.candidates[0];
  const candidate = (unitId, rosterIndex, terrainScore) => ({
    ...source,
    unit: {
      ...source.unit,
      id: unitId,
      name: unitId,
      hp: source.unit.maxHp
    },
    terrainScore,
    rosterIndex
  });
  const bondUnitIds = ['synthetic-bond-a', 'synthetic-bond-b'];
  const terrainUnitIds = ['synthetic-terrain-c', 'synthetic-terrain-d'];
  const context = {
    battleId: 'fixture-strong-bond-pair-seed',
    maxUnits: 2,
    orderId: 'elite',
    candidates: [
      candidate(bondUnitIds[0], 0, 100),
      candidate(bondUnitIds[1], 1, 100),
      candidate(terrainUnitIds[0], 2, 106),
      candidate(terrainUnitIds[1], 3, 106)
    ],
    requiredUnitIds: [],
    excludedUnitIds: [],
    recommendedUnits: [],
    recommendedClasses: [],
    bonds: [
      {
        id: 'synthetic-level-100-bond',
        unitIds: bondUnitIds,
        title: '강한 합성 공명',
        level: 100,
        exp: 0
      }
    ]
  };
  const plans = buildPlans(context);
  const resonance = plans.find((plan) => plan.id === 'resonance');
  const terrain = plans.find((plan) => plan.id === 'terrain-strategy');
  assert(
    resonance?.applicable === true &&
      resonance.metrics.activeBondCount === 1 &&
      bondUnitIds.every((unitId) => resonance.selectedUnitIds.includes(unitId)),
    `The resonance profile must seed both ends of a strong bond instead of getting trapped by one-member greedy additions: ${JSON.stringify(resonance)}`
  );
  assert(
    terrain?.applicable === true && terrainUnitIds.every((unitId) => terrain.selectedUnitIds.includes(unitId)),
    `The control profile must still prefer the strictly stronger unbonded terrain pair: ${JSON.stringify(terrain)}`
  );
}

function verifyUnavailableRequiredCandidate(base, buildPlans) {
  const requiredId = base.requiredUnitIds[0];
  const context = {
    ...base,
    candidates: base.candidates.map((candidate) => candidate.unit.id === requiredId
      ? { ...candidate, unit: { ...candidate.unit, hp: 0 }, available: false, blockedReason: '부상' }
      : candidate)
  };
  validateBlockedPlans(buildPlans(context), requiredId, 'injured required unit');
}

function verifyRequiredExcludedConflict(base, buildPlans) {
  const requiredId = base.requiredUnitIds[0];
  const context = { ...base, excludedUnitIds: [...(base.excludedUnitIds ?? []), requiredId] };
  validateBlockedPlans(buildPlans(context), requiredId, 'required/excluded conflict');
}

function verifyRequiredOverflow(base, buildPlans) {
  const requiredUnitIds = base.candidates.slice(0, 3).map((candidate) => candidate.unit.id);
  const context = { ...base, maxUnits: 2, requiredUnitIds };
  validateBlockedPlans(buildPlans(context), '출전 한도 2명', 'required overflow');
}

function verifyDuplicateAndNonAllyCandidates(base, buildPlans, formationRoles) {
  const duplicate = base.candidates[1];
  const enemySource = base.candidates[2];
  const enemyId = 'synthetic-enemy-candidate';
  const context = {
    ...base,
    candidates: [
      duplicate,
      ...base.candidates,
      { ...enemySource, unit: { ...enemySource.unit, id: enemyId, faction: 'enemy' }, rosterIndex: 999 }
    ]
  };
  buildPlans(context).forEach((plan) => {
    validateApplicablePlan({
      plan,
      battleId: 'fixture-duplicate-non-ally',
      orderId: base.orderId,
      context,
      formationRoles,
      expectedCount: base.maxUnits
    });
    assert(!plan.selectedUnitIds.includes(enemyId), `Non-allied candidate must be omitted: ${JSON.stringify(plan.selectedUnitIds)}`);
  });
}

function verifyMissingOrderFallback(base, buildPlans, formationRoles) {
  const context = { ...base };
  delete context.orderId;
  const plans = buildPlans(context);
  plans.forEach((plan) => {
    validateApplicablePlan({
      plan,
      battleId: 'fixture-order-fallback',
      orderId: undefined,
      context,
      formationRoles,
      expectedCount: base.maxUnits
    });
  });
  const orderPlan = plans.find((plan) => plan.id === 'order');
  assert(
    orderPlan.tradeoff.includes('군령 미선택') && orderPlan.highlights.some((line) => line.includes('미선택')),
    `Order fallback must explain its balanced calculation: ${JSON.stringify(orderPlan)}`
  );
}

function validateBlockedPlans(plans, expectedReasonFragment, label) {
  assert(
    JSON.stringify(plans.map((plan) => plan.id)) === JSON.stringify(['order', 'resonance', 'terrain-strategy']),
    `${label}: blocked result must retain all three stable cards: ${JSON.stringify(plans)}`
  );
  plans.forEach((plan) => {
    assert(
      plan.applicable === false &&
        plan.selectedUnitIds.length === 0 &&
        Object.keys(plan.formationAssignments).length === 0 &&
        plan.score === 0 &&
        plan.blockedReason?.includes(expectedReasonFragment) &&
        plan.summary === plan.blockedReason,
      `${label}/${plan.id}: expected a safe blocked plan: ${JSON.stringify(plan)}`
    );
  });
}

function planProjectionSignature(plan) {
  return JSON.stringify({ selectedUnitIds: plan.selectedUnitIds, formationAssignments: plan.formationAssignments });
}

function inRange(value, minimum, maximum) {
  return Number.isFinite(value) && value >= minimum && value <= maximum;
}

function isNonEmptyText(value) {
  return typeof value === 'string' && value.trim().length > 0;
}

function assertNonEmptyText(value, context) {
  assert(isNonEmptyText(value), `${context} must be a non-empty string: ${JSON.stringify(value)}`);
}

function assert(condition, message) {
  if (!condition) {
    throw new Error(message);
  }
}