/*
 * Copyright (C) 2018-2019 StApps
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <https://www.gnu.org/licenses/>.
 */
import {Logger} from '@openstapps/logger';
import * as commander from 'commander';
import {existsSync, readFileSync, writeFileSync} from 'fs';
import {join, resolve} from 'path';
import {
  getProjectReflection,
  mkdirPromisified,
  readFilePromisified,
  toArray,
} from './common';
import {pack} from './pack';
import {
  gatherRouteInformation,
  generateDocumentationForRoute,
  getNodeMetaInformationMap,
} from './routes';
import {Converter, getValidatableTypesFromReflection} from './schema';
import {createDiagram, createDiagramFromString} from './uml/createDiagram';
import {readDefinitions} from './uml/readDefinitions';
import {UMLConfig} from './uml/umlConfig';
import {validateFiles, writeReport} from './validate';

// handle unhandled promise rejections
process.on('unhandledRejection', async (error: Error) => {
  await Logger.error(error.message);
  Logger.info(error.stack);
  process.exit(1);
});

commander
  .version(JSON.parse(
    readFileSync(resolve(__dirname, '..', 'package.json'))
      .toString(),
  ).version);

commander
  .command('routes <srcPath> <mdPath>')
  .action(async (relativeSrcPath, relativeMdPath) => {
    // get absolute paths
    const srcPath = resolve(relativeSrcPath);
    const mdPath = resolve(relativeMdPath);

    // get project reflection
    const projectReflection = getProjectReflection(srcPath);

    // get information about routes
    const routes = await gatherRouteInformation(projectReflection);

    // initialize markdown output
    let output = '# Routes\n\n';

    // generate documentation for all routes
    routes.forEach((routeWithMetaInformation) => {
      output += generateDocumentationForRoute(
        routeWithMetaInformation,
        getNodeMetaInformationMap(projectReflection),
      );
    });

    // write documentation to file
    writeFileSync(mdPath, output);

    Logger.ok(`Route documentation written to ${mdPath}.`);
  });

commander
  .command('schema <srcPath> <schemaPath>')
  .action(async (relativeSrcPath, relativeSchemaPath) => {
    // get absolute paths
    const srcPath = resolve(relativeSrcPath);
    const schemaPath = resolve(relativeSchemaPath);

    // initialize new core converter
    const coreConverter = new Converter(srcPath);

    // get project reflection
    const projectReflection = getProjectReflection(srcPath);

    // get validatable types
    const validatableTypes = getValidatableTypesFromReflection(
      projectReflection,
    );

    Logger.info(`Found ${validatableTypes.length} type(s) to generate schemas for.`);

    await mkdirPromisified(schemaPath, {
      recursive: true,
    });

    Logger.info(`Trying to find a package.json for ${srcPath}.`);

    let path = srcPath;
    // TODO: this check should be less ugly! --- What is this doing anyway?
    // tslint:disable-next-line:no-magic-numbers
    while (!existsSync(join(path, 'package.json')) && path.length > 5) {
      path = resolve(path, '..');
    }

    const corePackageJsonPath = join(path, 'package.json');

    Logger.info(`Using ${corePackageJsonPath} to determine version for schemas.`);

    const buffer = await readFilePromisified(corePackageJsonPath);
    const corePackageJson = JSON.parse(buffer.toString());
    const coreVersion = corePackageJson.version;

    Logger.log(`Using ${coreVersion} as version for schemas.`);

    // generate and write JSONSchema files for validatable types
    validatableTypes.forEach((type) => {
      const schema = coreConverter.getSchema(type, coreVersion);

      // tslint:disable-next-line:no-magic-numbers
      const stringifiedSchema = JSON.stringify(schema, null, 2);

      const file = join(schemaPath, `${type}.json`);

      // write schema to file
      writeFileSync(file, stringifiedSchema);

      Logger.info(`Generated schema for ${type} and saved to ${file}.`);
    });

    Logger.ok(`Generated schemas for ${validatableTypes.length} type(s).`);
  });

commander
  .command('validate <schemaPath> <testPath> [reportPath]')
  .action(async (relativeSchemaPath, relativeTestPath, relativeReportPath) => {
    // get absolute paths
    const schemaPath = resolve(relativeSchemaPath);
    const testPath = resolve(relativeTestPath);

    const errorsPerFile = await validateFiles(schemaPath, testPath);

    let unexpected = false;
    for (const file in errorsPerFile) {
      if (!errorsPerFile.hasOwnProperty(file)) {
        continue;
      }

      unexpected = unexpected || errorsPerFile[file].some((error) => !error.expected);
    }

    if (typeof relativeReportPath !== 'undefined') {
      const reportPath = resolve(relativeReportPath);
      await writeReport(reportPath, errorsPerFile);
    }

    if (!unexpected) {
      Logger.ok('Successfully finished validation.');
    } else {
      await Logger.error('Unexpected errors occurred during validation');
      process.exit(1);
    }
  });

commander.command('pack').action(async () => {
  await pack();
});

commander
  .command('plantuml <srcPath> <plantumlserver>')
  .option(
    '--definitions <definitions>',
    'Shows these specific definitions (class or enum)',
    toArray,
  )
  .option('--showAssociations', 'Shows associations of classes')
  .option(
    '--showInheritance',
    'Shows extensions and implementations of classes',
  )
  .option('--showEnumValues', 'Show enum values')
  .option('--showProperties', 'Show attributes')
  .option(
    '--showInheritedProperties',
    'Shows inherited attributes, needs --showProperties',
  )
  .option(
    '--showOptionalProperties',
    'Shows optional attributes and relations, needs --showProperties',
  )
  .option(
    '--excludeExternals',
    'Exclude external definitions',
  )
  .action(async (relativeSrcPath, plantumlserver, options) => {
    const plantUmlConfig: UMLConfig = {
      definitions:
        typeof options.definitions !== 'undefined' ? options.definitions : [],
      showAssociations:
        typeof options.showAssociations !== 'undefined'
          ? options.showAssociations
          : false,
      showEnumValues:
        typeof options.showEnumValues !== 'undefined'
          ? options.showEnumValues
          : false,
      showInheritance:
        typeof options.showInheritance !== 'undefined'
          ? options.showInheritance
          : false,
      showInheritedProperties:
        typeof options.showInheritedProperties !== 'undefined'
          ? options.showInheritedProperties
          : false,
      showOptionalProperties:
        typeof options.showOptionalProperties !== 'undefined'
          ? options.showOptionalProperties
          : false,
      showProperties:
        typeof options.showProperties !== 'undefined'
          ? options.showEnumValues
          : false,
    };

    Logger.log(`PlantUML options: ${JSON.stringify(plantUmlConfig)}`);

    const srcPath = resolve(relativeSrcPath);

    const projectReflection = getProjectReflection(srcPath, !options.excludeExternals ? false : true);

    const definitions = readDefinitions(projectReflection);

    await createDiagram(definitions, plantUmlConfig, plantumlserver);
  });

commander
  .command('plantuml-file <file> <plantumlserver>')
  .action(async (file: string, plantumlserver: string) => {
    const fileContent = readFileSync(resolve(file)).toString();
    await createDiagramFromString(fileContent, plantumlserver);
  });

commander.parse(process.argv);

if (commander.args.length < 1) {
  commander.outputHelp();
  process.exit(1);
}