'use strict';

const path = require('path');
const chai = require('chai');
const sinon = require('sinon');
const writeFileSync = require('./fs/writeFileSync');
const serverlessConfigFileUtils = require('./getServerlessConfigFile');
const { getTmpDirPath } = require('../../test/utils/fs');
const fixtures = require('../../test/fixtures');
const runServerless = require('../../test/utils/run-serverless');

const getServerlessConfigFile = serverlessConfigFileUtils.getServerlessConfigFile;

chai.use(require('chai-as-promised'));
chai.use(require('sinon-chai'));

const expect = chai.expect;

describe('#getServerlessConfigFile()', () => {
  let tmpDirPath;

  beforeEach(() => {
    tmpDirPath = getTmpDirPath();
  });

  it('should return an empty string if no serverless file is found', () => {
    const randomFilePath = path.join(tmpDirPath, 'not-a-serverless-file');

    writeFileSync(randomFilePath, 'some content');
    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.equal(null);
    });
  });

  it('should return an empty object for empty configuration', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.yml');

    writeFileSync(serverlessFilePath, '{}');
    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.deep.equal({});
    });
  });

  it('should return the file content if a serverless.yml file is found', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.yml');

    writeFileSync(serverlessFilePath, 'service: my-yml-service');
    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.deep.equal({ service: 'my-yml-service' });
    });
  });

  it('should return the file content if a serverless.yaml file is found', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.yaml');

    writeFileSync(serverlessFilePath, 'service: my-yaml-service');
    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.deep.equal({ service: 'my-yaml-service' });
    });
  });

  it('should return the file content if a foobar.yaml file is specified & found', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'foobar.yaml');

    writeFileSync(serverlessFilePath, 'service: my-yaml-service');
    return expect(
      getServerlessConfigFile({
        processedInput: { options: { config: 'foobar.yaml' } },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.deep.equal({ service: 'my-yaml-service' });
    });
  });

  it('should return the file content if a serverless.json file is found', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.json');

    writeFileSync(serverlessFilePath, '{ "service": "my-json-service" }');
    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.deep.equal({ service: 'my-json-service' });
    });
  });

  it('should return the file content if a serverless.js file found', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.js');
    writeFileSync(serverlessFilePath, 'module.exports = {"service": "my-json-service"};');

    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.deep.equal({ service: 'my-json-service' });
    });
  });

  it('should return the resolved value if a promise-using serverless.js file found', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.js');
    writeFileSync(
      serverlessFilePath,
      'module.exports = new Promise(resolve => { resolve({"service": "my-json-service"}); });'
    );

    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.fulfilled.then(result => {
      expect(result).to.deep.equal({ service: 'my-json-service' });
    });
  });

  it('should throw an error, if serverless.js export not a plain object', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.js');
    writeFileSync(serverlessFilePath, 'module.exports = function config() {};');

    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: { servicePath: tmpDirPath },
      })
    ).to.be.rejectedWith('serverless.js must export plain object');
  });

  it('should look in the current working directory if servicePath is undefined', () => {
    const serverlessFilePath = path.join(tmpDirPath, 'serverless.yml');

    writeFileSync(serverlessFilePath, 'service: my-yml-service');
    const cwd = process.cwd();
    process.chdir(tmpDirPath);
    return expect(
      getServerlessConfigFile({
        processedInput: { options: {} },
        config: {},
      })
    ).to.be.fulfilled.then(
      result => {
        process.chdir(cwd);
        expect(result).to.deep.equal({ service: 'my-yml-service' });
      },
      error => {
        process.chdir(cwd);
        throw error;
      }
    );
  });

  describe('serverless.ts', () => {
    const tsNodePath = 'node_modules/ts-node.js';

    afterEach(() => {
      sinon.restore();
    });

    it('should throw TS_NODE_NOT_FOUND error when ts-node is not found', () => {
      return runServerless({
        fixture: 'serverlessTs',
        cliArgs: ['package'],
        shouldStubSpawn: true,
      }).catch(error => {
        if (error.code !== 'TS_NODE_NOT_FOUND') throw error;
      });
    });

    it('should package serverless.ts files when ts-node is found', () =>
      fixtures.setup('serverlessTs').then(({ servicePath }) => {
        const tsNodeFullPath = `${servicePath}/${tsNodePath}`;

        writeFileSync(tsNodeFullPath, 'module.exports.register = () => null;');
        const registerSpy = sinon.spy(require(tsNodeFullPath), 'register');

        return runServerless({
          cwd: servicePath,
          cliArgs: ['package'],
        }).then(({ serverless }) => {
          expect(registerSpy).to.have.callCount(1);
          expect(serverless.service.service).to.equal('serverless-ts-service');
          return expect(serverless.service.provider.name).to.equal('aws');
        });
      }));
  });
});