import type { DeveloperEcosystem } from '@ai-tycoon/shared';
import {
  BASE_DEV_GROWTH,
  FREE_TIER_DEV_MULTIPLIER,
  OPEN_SOURCE_DEV_BOOST,
  DEV_REL_EFFECTIVENESS,
  SDK_GROWTH_BONUS,
  DEV_ECOSYSTEM_WEIGHTS,
  STARTUP_ADOPTION_PER_DEV,
  ENTERPRISE_REFERRAL_PER_STARTUP,
  TAM_BASE_SIZES,
} from '@ai-tycoon/shared';
import type { Era } from '@ai-tycoon/shared';

export function processDeveloperEcosystem(
  eco: DeveloperEcosystem,
  openSourceCount: number,
  apiFreeTierDevs: number,
  apiTotalDevs: number,
  engineeringHeadcount: number,
  era: Era,
): DeveloperEcosystem {
  const updated = { ...eco };

  const eraCap = TAM_BASE_SIZES[era].developer;

  const growthRate =
    BASE_DEV_GROWTH +
    apiFreeTierDevs * FREE_TIER_DEV_MULTIPLIER +
    openSourceCount * OPEN_SOURCE_DEV_BOOST +
    updated.devRelSpending * DEV_REL_EFFECTIVENESS +
    updated.sdkCoverage * SDK_GROWTH_BONUS;

  const logisticDamping = Math.max(0, 1 - updated.communitySize / Math.max(1, eraCap));
  updated.communityGrowthRate = growthRate * logisticDamping;
  updated.communitySize = Math.max(0, updated.communitySize + updated.communitySize * updated.communityGrowthRate);

  if (updated.communitySize < 10 && apiTotalDevs > 0) {
    updated.communitySize += 1 + apiTotalDevs * 0.1;
  }

  updated.activeDevelopers = apiTotalDevs;
  updated.openSourceContributions = openSourceCount;

  const sdkTarget = Math.min(1, engineeringHeadcount / 50);
  updated.sdkCoverage += (sdkTarget - updated.sdkCoverage) * 0.005;
  updated.sdkCoverage = Math.min(1, Math.max(0, updated.sdkCoverage));

  const docTarget = Math.min(1, updated.devRelSpending / 500);
  updated.documentationQuality += (docTarget - updated.documentationQuality) * 0.003;
  updated.documentationQuality = Math.min(1, Math.max(0, updated.documentationQuality));

  const communityNorm = Math.min(1, updated.communitySize / Math.max(1, eraCap * 0.1));
  const activeRatio = updated.communitySize > 0
    ? Math.min(1, updated.activeDevelopers / updated.communitySize)
    : 0;
  const osNorm = Math.min(1, openSourceCount / 5);

  updated.ecosystemScore = (
    DEV_ECOSYSTEM_WEIGHTS.communitySize * communityNorm +
    DEV_ECOSYSTEM_WEIGHTS.activeRatio * activeRatio +
    DEV_ECOSYSTEM_WEIGHTS.sdkCoverage * updated.sdkCoverage +
    DEV_ECOSYSTEM_WEIGHTS.docQuality * updated.documentationQuality +
    DEV_ECOSYSTEM_WEIGHTS.openSource * osNorm
  ) * 100;

  updated.startupsAdopted = Math.floor(updated.activeDevelopers * STARTUP_ADOPTION_PER_DEV);
  updated.enterpriseReferrals = Math.floor(updated.startupsAdopted * ENTERPRISE_REFERRAL_PER_STARTUP);

  return updated;
}