#!/usr/bin/env node
import 'source-map-support/register.js';
import './punycode.cjs';

import { styleText } from 'node:util';
import { isNonEmptyStringAndNotWhitespace } from '@sindresorhus/is';
import { Command, CommanderError } from 'commander';
import { dequal } from 'dequal';
import { diffLines } from 'diff';
import fs from 'fs-extra';
import { getConfigFileNames } from './config/app-strings.ts';
import { GlobalConfig } from './config/global.ts';
import { massageConfig } from './config/massage.ts';
import { migrateConfig } from './config/migration.ts';
import type { AllConfig, RenovateConfig } from './config/types.ts';
import { validateConfig } from './config/validation.ts';
import { pkg } from './expose.ts';
import { init, logger } from './logger/index.ts';
import { getEnv } from './util/env.ts';
import { add as addHostRule } from './util/host-rules.ts';
import { regEx, regexEngineStatus } from './util/regex.ts';
import { getConfig as getFileConfig } from './workers/global/config/parse/file.ts';
import { parseConfigs } from './workers/global/config/parse/index.ts';
import { getParsedContent } from './workers/global/config/parse/util.ts';

await init();

const { pathExists, readFile } = fs;

let returnVal = 0;

/**
 * Make sure that we've resolved configuration from the different places that Renovate users would expect them to be specified
 *
 * This then allows a `configType=repo` config to i.e. be validated alongside a `config.js` or `env RENOVATE_ALLOWED_COMMANDS=...`
 *
 * Note that we intentionally don't fully initialize Renovate and its modules, as we're not fully running, and it would require a Platform to be configured
 * */
async function partiallyGlobalInitialize(): Promise<void> {
  // NOTE that this doesn't allow command-line arguments
  const globalConfig = await parseConfigs(getEnv(), []);
  GlobalConfig.set(globalConfig);

  if (globalConfig.hostRules) {
    // the self-hosted admin's own headers get no exemption from `allowedHeaders` either, as `applyHostRule` filters the rule it matches by header name alone whoever set it - so `addHostRule` drops them here too, with a WARN, rather than leave them to be silently discarded at request time
    for (const hostRule of globalConfig.hostRules) {
      addHostRule(hostRule);
    }
  }
}

async function validate(
  configType: 'global' | 'repo',
  desc: string,
  config: RenovateConfig,
  strict: boolean,
  isPreset = false,
): Promise<void> {
  if (config.hostRules) {
    // `allowedHeaders` enforces the checks regardless of whether it's global self-hosted administrator config, or repo config
    // a global config file being validated brings its own `allowedHeaders`, and should be validated against it, like a real run would after parsing it
    const allowedHeaders =
      configType === 'global'
        ? ((config as AllConfig).allowedHeaders ??
          GlobalConfig.get('allowedHeaders'))
        : GlobalConfig.get('allowedHeaders');
    for (const hostRule of config.hostRules) {
      addHostRule(hostRule, { allowedHeaders });
    }
  }
  const { isMigrated, migratedConfig } = migrateConfig(config);
  if (isMigrated) {
    logger.warn(
      {
        oldConfig: config,
        newConfig: migratedConfig,
      },
      'Config migration necessary',
    );
    const changedObjects = diffLines(
      JSON.stringify(config, null, 2),
      JSON.stringify(migratedConfig, null, 2),
      { ignoreWhitespace: false, newlineIsToken: false },
    );
    const added = styleText('green', '+ ');
    const removed = styleText('red', '- ');
    const msg = changedObjects
      .flatMap((part) => {
        let linePrefix: string;
        if (part.added) {
          linePrefix = added;
        } else if (part.removed) {
          linePrefix = removed;
        } else {
          linePrefix = '  ';
        }
        return part.value
          .split('\n')
          .filter(isNonEmptyStringAndNotWhitespace)
          .map((line) =>
            line.replace(regEx(/^(?<ws> *)/), `${linePrefix}$<ws>`),
          );
      })
      .join('\n');
    // oxlint-disable-next-line renovate/logger-static-message -- the multi-line, colorized diff must be interpolated to stay readable; as a metadata field it is JSON-escaped onto one line
    logger.warn(`Config migration diff:\n${msg}`);
    if (strict) {
      returnVal = 1;
    }
  }
  const massagedConfig = massageConfig(migratedConfig);
  const res = await validateConfig(configType, massagedConfig, isPreset);
  if (res.errors.length) {
    logger.error(
      { file: desc, errors: res.errors },
      'Found errors in configuration',
    );
    returnVal = 1;
  }
  if (res.warnings.length) {
    logger.warn(
      { file: desc, warnings: res.warnings },
      'Found errors in configuration',
    );
    returnVal = 1;
  }
}

interface PackageJson {
  renovate?: RenovateConfig;
  'renovate-config'?: Record<string, RenovateConfig>;
}

(async () => {
  await partiallyGlobalInitialize();

  const program = new Command('renovate-config-validator')
    .summary('Validate Renovate configuration files')
    .description(
      `Validate your Renovate configuration (repo config, shared presets or global configuration) files\n` +
        // oxlint-disable-next-line renovate/no-hardcoded-docs-url -- CLI help text, no config available
        'If no [config-files...] are given, renovate-config-validator will look at the default config file locations (https://docs.renovatebot.com/configuration-options/)',
    )
    .addHelpText(
      'after',
      // oxlint-disable-next-line renovate/no-hardcoded-docs-url -- CLI help text, no config available
      `
When specifying [config-files...], Renovate will treat them as global self-hosted configuration files. You can disable this behaviour with --no-global

Examples:

  $ renovate-config-validator
  $ renovate-config-validator --strict
  $ renovate-config-validator first_config.json
  $ renovate-config-validator --strict config.js
  $ renovate-config-validator --no-global renovate.json5
  $ env RENOVATE_CONFIG_FILE=obscure-name.json renovate-config-validator

Global configuration:

If you have specified global self-hosted configuration (https://docs.renovatebot.com/self-hosted-configuration/) in environment variables or in a \`config.js\`, this will be detected:

  $ env RENOVATE_ALLOWED_ENV='["GO*"]' renovate-config-validator
  # if passing the filename, make sure it's not validating as a global config
  $ env RENOVATE_ALLOWED_ENV='["GO*"]' renovate-config-validator --no-global renovate.json`,
    )
    .argument('[config-files...]')
    .version(pkg.version, '-v, --version')
    .option(
      '--strict',
      'Fail command if any configuration warnings, errors, or a migration is needed',
    )
    .option(
      '--no-global',
      'When specifying [config-files], do not treat them as global self-hosted configuration file(s)',
      true,
    )
    // allow us to manage the exit code
    .exitOverride();

  program.action(async (files, opts) => {
    const strict = opts.strict ?? false;
    let filesValidated = 0;

    // without RE2, patterns are checked by RegExp, which accepts syntax RE2 rejects (e.g. lookahead)
    if (regexEngineStatus.type === 'unavailable') {
      logger.warn(
        { err: regexEngineStatus.err },
        'RE2 not usable, falling back to RegExp: regex validation may be inaccurate',
      );
    } else if (regexEngineStatus.type === 'ignored') {
      logger.debug(
        'RE2 ignored via RENOVATE_X_IGNORE_RE2: regex validation may be inaccurate',
      );
    }

    if (files.length) {
      let isGlobalConfig = true;
      if (opts.global === false) {
        isGlobalConfig = false;
      }
      const configType = isGlobalConfig ? 'global' : 'repo';
      for (const file of files) {
        try {
          if (!(await pathExists(file))) {
            returnVal = 1;
            logger.error({ file }, 'File does not exist');
            break;
          }
          const parsedContent = await getParsedContent(file);
          try {
            logger.info(`Validating ${file} as ${configType} config`);
            await validate(configType, file, parsedContent, strict);
          } catch (err) {
            logger.warn({ file, err }, 'File is not valid Renovate config');
            returnVal = 1;
          }
        } catch (err) {
          logger.warn({ file, err }, 'File could not be parsed');
          returnVal = 1;
        }

        filesValidated++;
      }
    } else {
      for (const file of getConfigFileNames().filter(
        (name) => name !== 'package.json',
      )) {
        try {
          if (!(await pathExists(file))) {
            continue;
          }
          const parsedContent = await getParsedContent(file);
          try {
            logger.info(`Validating ${file}`);
            await validate('repo', file, parsedContent, strict);
          } catch (err) {
            logger.warn({ file, err }, 'File is not valid Renovate config');
            returnVal = 1;
          }
        } catch (err) {
          logger.warn({ file, err }, 'File could not be parsed');
          returnVal = 1;
        }

        filesValidated++;
      }
      try {
        const pkgJson = JSON.parse(
          await readFile('package.json', 'utf8'),
        ) as PackageJson;
        if (pkgJson.renovate) {
          logger.info(`Validating package.json > renovate`);
          await validate(
            'repo',
            'package.json > renovate',
            pkgJson.renovate,
            strict,
          );

          filesValidated++;
        }
        if (pkgJson['renovate-config']) {
          logger.info(`Validating package.json > renovate-config`);
          for (const presetConfig of Object.values(
            pkgJson['renovate-config'],
          )) {
            await validate(
              'repo',
              'package.json > renovate-config',
              presetConfig,
              strict,
              true,
            );

            filesValidated++;
          }
        }
      } catch {
        // ignore
      }
      try {
        const env = getEnv();
        const fileConfig = await getFileConfig(env);
        if (!dequal(fileConfig, {})) {
          const file = env.RENOVATE_CONFIG_FILE ?? 'config.js';
          logger.info(`Validating ${file}`);
          try {
            await validate('global', file, fileConfig, strict);
          } catch (err) {
            logger.error({ file, err }, 'File is not valid Renovate config');
            returnVal = 1;
          }
          filesValidated++;
        }
      } catch {
        // ignore
      }
    }
    if (returnVal === 0 && filesValidated) {
      logger.info(
        `Config validated successfully against ${filesValidated} file(s)`,
      );
    } else if (!filesValidated) {
      logger.warn(`No files to perform configuration validation against`);
    }
    // Use exitCode (not process.exit) so async log streams can flush
    process.exitCode = returnVal;
  });

  await program.parseAsync();
})().catch((e) => {
  // Commander throws an error at the end of Action execution i.e. as part of the `help` and `version` commands, and so we don't want to return an error code in this case
  if (
    e instanceof CommanderError &&
    (e.code === 'commander.helpDisplayed' || e.code === 'commander.version')
  ) {
    return;
  }

  // oxlint-disable-next-line no-console -- intentional: display critical error on CLI
  console.error(e);
  process.exit(99);
});