#!/usr/bin/env node
/**
 * Validate selective-install manifests and profile/module relationships.
 * Module paths are curated repo paths only. Generated/imported skill roots
 * (~/.claude/skills/learned, etc.) are never in manifests.
 */

const fs = require('fs');
const path = require('path');
const Ajv = require('ajv');

const REPO_ROOT = path.join(__dirname, '../..');
const MODULES_MANIFEST_PATH = path.join(REPO_ROOT, 'manifests/install-modules.json');
const PROFILES_MANIFEST_PATH = path.join(REPO_ROOT, 'manifests/install-profiles.json');
const COMPONENTS_MANIFEST_PATH = path.join(REPO_ROOT, 'manifests/install-components.json');
const MODULES_SCHEMA_PATH = path.join(REPO_ROOT, 'schemas/install-modules.schema.json');
const PROFILES_SCHEMA_PATH = path.join(REPO_ROOT, 'schemas/install-profiles.schema.json');
const COMPONENTS_SCHEMA_PATH = path.join(REPO_ROOT, 'schemas/install-components.schema.json');
const COMPONENT_FAMILY_PREFIXES = {
  baseline: 'baseline:',
  language: 'lang:',
  framework: 'framework:',
  capability: 'capability:',
};

function readJson(filePath, label) {
  try {
    return JSON.parse(fs.readFileSync(filePath, 'utf8'));
  } catch (error) {
    throw new Error(`Invalid JSON in ${label}: ${error.message}`);
  }
}

function normalizeRelativePath(relativePath) {
  return String(relativePath).replace(/\\/g, '/').replace(/\/+$/, '');
}

function validateSchema(ajv, schemaPath, data, label) {
  const schema = readJson(schemaPath, `${label} schema`);
  const validate = ajv.compile(schema);
  const valid = validate(data);

  if (!valid) {
    for (const error of validate.errors) {
      console.error(
        `ERROR: ${label} schema: ${error.instancePath || '/'} ${error.message}`
      );
    }
    return true;
  }

  return false;
}

function validateInstallManifests() {
  if (!fs.existsSync(MODULES_MANIFEST_PATH) || !fs.existsSync(PROFILES_MANIFEST_PATH)) {
    console.log('Install manifests not found, skipping validation');
    process.exit(0);
  }

  let hasErrors = false;
  let modulesData;
  let profilesData;
  let componentsData = { version: null, components: [] };

  try {
    modulesData = readJson(MODULES_MANIFEST_PATH, 'install-modules.json');
    profilesData = readJson(PROFILES_MANIFEST_PATH, 'install-profiles.json');
    if (fs.existsSync(COMPONENTS_MANIFEST_PATH)) {
      componentsData = readJson(COMPONENTS_MANIFEST_PATH, 'install-components.json');
    }
  } catch (error) {
    console.error(`ERROR: ${error.message}`);
    process.exit(1);
  }

  const ajv = new Ajv({ allErrors: true });
  hasErrors = validateSchema(ajv, MODULES_SCHEMA_PATH, modulesData, 'install-modules.json') || hasErrors;
  hasErrors = validateSchema(ajv, PROFILES_SCHEMA_PATH, profilesData, 'install-profiles.json') || hasErrors;
  if (fs.existsSync(COMPONENTS_MANIFEST_PATH)) {
    hasErrors = validateSchema(ajv, COMPONENTS_SCHEMA_PATH, componentsData, 'install-components.json') || hasErrors;
  }

  if (hasErrors) {
    process.exit(1);
  }

  const modules = Array.isArray(modulesData.modules) ? modulesData.modules : [];
  const moduleIds = new Set();
  const claimedPaths = new Map();

  for (const module of modules) {
    if (moduleIds.has(module.id)) {
      console.error(`ERROR: Duplicate install module id: ${module.id}`);
      hasErrors = true;
    }
    moduleIds.add(module.id);

    for (const dependency of module.dependencies) {
      if (!moduleIds.has(dependency) && !modules.some(candidate => candidate.id === dependency)) {
        console.error(`ERROR: Module ${module.id} depends on unknown module ${dependency}`);
        hasErrors = true;
      }
      if (dependency === module.id) {
        console.error(`ERROR: Module ${module.id} cannot depend on itself`);
        hasErrors = true;
      }
    }

    for (const relativePath of module.paths) {
      const normalizedPath = normalizeRelativePath(relativePath);
      const absolutePath = path.join(REPO_ROOT, normalizedPath);

      // All module paths must exist; no optional/generated paths in manifests
      if (!fs.existsSync(absolutePath)) {
        console.error(
          `ERROR: Module ${module.id} references missing path: ${normalizedPath}`
        );
        hasErrors = true;
      }

      if (claimedPaths.has(normalizedPath)) {
        console.error(
          `ERROR: Install path ${normalizedPath} is claimed by both ${claimedPaths.get(normalizedPath)} and ${module.id}`
        );
        hasErrors = true;
      } else {
        claimedPaths.set(normalizedPath, module.id);
      }
    }
  }

  const profiles = profilesData.profiles || {};
  const components = Array.isArray(componentsData.components) ? componentsData.components : [];
  const expectedProfileIds = ['core', 'developer', 'security', 'research', 'full'];

  for (const profileId of expectedProfileIds) {
    if (!profiles[profileId]) {
      console.error(`ERROR: Missing required install profile: ${profileId}`);
      hasErrors = true;
    }
  }

  for (const [profileId, profile] of Object.entries(profiles)) {
    const seenModules = new Set();
    for (const moduleId of profile.modules) {
      if (!moduleIds.has(moduleId)) {
        console.error(
          `ERROR: Profile ${profileId} references unknown module ${moduleId}`
        );
        hasErrors = true;
      }

      if (seenModules.has(moduleId)) {
        console.error(
          `ERROR: Profile ${profileId} contains duplicate module ${moduleId}`
        );
        hasErrors = true;
      }
      seenModules.add(moduleId);
    }
  }

  if (profiles.full) {
    const fullModules = new Set(profiles.full.modules);
    for (const moduleId of moduleIds) {
      if (!fullModules.has(moduleId)) {
        console.error(`ERROR: full profile is missing module ${moduleId}`);
        hasErrors = true;
      }
    }
  }

  const componentIds = new Set();
  for (const component of components) {
    if (componentIds.has(component.id)) {
      console.error(`ERROR: Duplicate install component id: ${component.id}`);
      hasErrors = true;
    }
    componentIds.add(component.id);

    const expectedPrefix = COMPONENT_FAMILY_PREFIXES[component.family];
    if (expectedPrefix && !component.id.startsWith(expectedPrefix)) {
      console.error(
        `ERROR: Component ${component.id} does not match expected ${component.family} prefix ${expectedPrefix}`
      );
      hasErrors = true;
    }

    const seenModules = new Set();
    for (const moduleId of component.modules) {
      if (!moduleIds.has(moduleId)) {
        console.error(`ERROR: Component ${component.id} references unknown module ${moduleId}`);
        hasErrors = true;
      }

      if (seenModules.has(moduleId)) {
        console.error(`ERROR: Component ${component.id} contains duplicate module ${moduleId}`);
        hasErrors = true;
      }
      seenModules.add(moduleId);
    }
  }

  if (hasErrors) {
    process.exit(1);
  }

  console.log(
    `Validated ${modules.length} install modules, ${components.length} install components, and ${Object.keys(profiles).length} profiles`
  );
}

validateInstallManifests();