import type { OpenClawConfig, SkillConfig } from "../../config/config.js";
import type { SkillEligibilityContext, SkillEntry } from "./types.js";
import {
  hasBinary,
  isConfigPathTruthyWithDefaults,
  resolveConfigPath,
  resolveRuntimePlatform,
} from "../../shared/config-eval.js";
import { resolveSkillKey } from "./frontmatter.js";

const DEFAULT_CONFIG_VALUES: Record<string, boolean> = {
  "browser.enabled": true,
  "browser.evaluateEnabled": true,
};

export { hasBinary, resolveConfigPath, resolveRuntimePlatform };

export function isConfigPathTruthy(config: OpenClawConfig | undefined, pathStr: string): boolean {
  return isConfigPathTruthyWithDefaults(config, pathStr, DEFAULT_CONFIG_VALUES);
}

export function resolveSkillConfig(
  config: OpenClawConfig | undefined,
  skillKey: string,
): SkillConfig | undefined {
  const skills = config?.skills?.entries;
  if (!skills || typeof skills !== "object") {
    return undefined;
  }
  const entry = (skills as Record<string, SkillConfig | undefined>)[skillKey];
  if (!entry || typeof entry !== "object") {
    return undefined;
  }
  return entry;
}

function normalizeAllowlist(input: unknown): string[] | undefined {
  if (!input) {
    return undefined;
  }
  if (!Array.isArray(input)) {
    return undefined;
  }
  const normalized = input.map((entry) => String(entry).trim()).filter(Boolean);
  return normalized.length > 0 ? normalized : undefined;
}

const BUNDLED_SOURCES = new Set(["openclaw-bundled"]);

function isBundledSkill(entry: SkillEntry): boolean {
  return BUNDLED_SOURCES.has(entry.skill.source);
}

export function resolveBundledAllowlist(config?: OpenClawConfig): string[] | undefined {
  return normalizeAllowlist(config?.skills?.allowBundled);
}

export function isBundledSkillAllowed(entry: SkillEntry, allowlist?: string[]): boolean {
  if (!allowlist || allowlist.length === 0) {
    return true;
  }
  if (!isBundledSkill(entry)) {
    return true;
  }
  const key = resolveSkillKey(entry.skill, entry);
  return allowlist.includes(key) || allowlist.includes(entry.skill.name);
}

export function shouldIncludeSkill(params: {
  entry: SkillEntry;
  config?: OpenClawConfig;
  eligibility?: SkillEligibilityContext;
}): boolean {
  const { entry, config, eligibility } = params;
  const skillKey = resolveSkillKey(entry.skill, entry);
  const skillConfig = resolveSkillConfig(config, skillKey);
  const allowBundled = normalizeAllowlist(config?.skills?.allowBundled);
  const osList = entry.metadata?.os ?? [];
  const remotePlatforms = eligibility?.remote?.platforms ?? [];

  if (skillConfig?.enabled === false) {
    return false;
  }
  if (!isBundledSkillAllowed(entry, allowBundled)) {
    return false;
  }
  if (
    osList.length > 0 &&
    !osList.includes(resolveRuntimePlatform()) &&
    !remotePlatforms.some((platform) => osList.includes(platform))
  ) {
    return false;
  }
  if (entry.metadata?.always === true) {
    return true;
  }

  const requiredBins = entry.metadata?.requires?.bins ?? [];
  if (requiredBins.length > 0) {
    for (const bin of requiredBins) {
      if (hasBinary(bin)) {
        continue;
      }
      if (eligibility?.remote?.hasBin?.(bin)) {
        continue;
      }
      return false;
    }
  }
  const requiredAnyBins = entry.metadata?.requires?.anyBins ?? [];
  if (requiredAnyBins.length > 0) {
    const anyFound =
      requiredAnyBins.some((bin) => hasBinary(bin)) ||
      eligibility?.remote?.hasAnyBin?.(requiredAnyBins);
    if (!anyFound) {
      return false;
    }
  }

  const requiredEnv = entry.metadata?.requires?.env ?? [];
  if (requiredEnv.length > 0) {
    for (const envName of requiredEnv) {
      if (process.env[envName]) {
        continue;
      }
      if (skillConfig?.env?.[envName]) {
        continue;
      }
      if (skillConfig?.apiKey && entry.metadata?.primaryEnv === envName) {
        continue;
      }
      return false;
    }
  }

  const requiredConfig = entry.metadata?.requires?.config ?? [];
  if (requiredConfig.length > 0) {
    for (const configPath of requiredConfig) {
      if (!isConfigPathTruthy(config, configPath)) {
        return false;
      }
    }
  }

  return true;
}
