const path = require('path');

module.exports = {
  tags: async (tln) => [],
  options: async (tln, args) => {
    args
      .prefix('TLN_GOLANG')
      .option('main', { describe: 'Module name with main entry point', default: 'service', type: 'string' })
      .option('target', { describe: 'Output folder', default: 'target', type: 'string' })
      .option('module', { describe: 'Module name, is used from init & get commands', default: [], type: 'array' })
    ;
  },
  env: async (tln, env) => {
    env.GOLANG_HOME = env.TLN_COMPONENT_HOME;
    env.PATH = [path.join(env.TLN_COMPONENT_HOME, 'bin'), env.PATH].join(path.delimiter);
  },
  dotenvs: async (tln) => [],
  inherits: async (tln) => [],
  depends: async (tln) => [],
  steps: async (tln) => [
    //
    { id: 'init', builder: async (tln, script) => {
        const modules = script.env.TLN_GOLANG_MODULE.join(' ');
        script.set([`
go mod init ${modules}
        `]);
      }
    },
    //
    { id: 'update', builder: async (tln, script) => {
        script.set([`
go mod tidy && go mod download
        `]);
      }
    },
    //
    { id: 'build', builder: async (tln, script) => {
        const target = script.env.TLN_GOLANG_TARGET;
        const main = script.env.TLN_GOLANG_MAIN;
        script.set([`
go build -o ${target}/${main} ${main}.go
        `]);
      }
    },
    //
    { id: 'get', builder: async (tln, script) => {
        const modules = script.env.TLN_GOLANG_MODULE.join(' ');
        script.set([`
go get ${modules}
        `]);
      }
    },
    //
    { id: 'serve', builder: async (tln, script) => {
        const target = script.env.TLN_GOLANG_TARGET;
        const main = script.env.TLN_GOLANG_MAIN;
        script.set([`
${target}/${main}
        `]);
      }
    },
    //
    { id: 'version', builder: async (tln, script) => {
      const id = script.env.TLN_COMPONENT_ID;
      const home = script.env.TLN_COMPONENT_HOME;
      const {name, version} = tln.unpackId(id);
      if (version) {
        script.set([`
echo [golang] && go version
        `]);
      }
    }},
    //
    { id: 'install', builder: async (tln, script) => {
      const id = script.env.TLN_COMPONENT_ID;
      const home = script.env.TLN_COMPONENT_HOME;
      const {name, version} = tln.unpackId(id);
      if (version && tln.canInstallComponent(tln, id, home)) {
        script.set(tln.getDownloadScript(tln, {
          linux: {
            name: `go${version}.linux-amd64.tar.gz`,
            opts: { src: `go`, flt:`*`, dest:`.`, rmv: `go` },
            url: `https://dl.google.com/go/go${version}.linux-amd64.tar.gz`
          },
          darwin: {
            name: `go${version}.darwin-amd64.tar.gz`,
            opts: { src: `go`, flt: `*`, dest: `.`, rmv: `go` },
            url: `https://dl.google.com/go/go${version}.darwin-amd64.tar.gz`
          },
          win32: {
            name: `go${version}.windows-amd64.zip`,
            opts: { src: `go`, flt: `*`, dest: `.`, rmv: `go` },
            url: `https://dl.google.com/go/go${version}.windows-amd64.zip`
          }
        }));
      }
    }}
  ],
  components: async (tln) => require('./components.js')
}