const Git = require('simple-git');
const inquirer = require('inquirer');
const report = require('yurnalist');
const _ = require('lodash');

async function checkWorkspaceClean() {
    return Git().status().then((result) => {
        if (!result.isClean()) throw new Error('workspace not clean, aborting');
    })
}

async function currentBranch() {
    let branch = await Git().raw('branch', '--show-current');
    return branch.replace("\n",'');
}

async function getBaseBranch(branch) {

    const base = await Git().getConfig(`branch.${branch}.mikado-base`);

    if(base.value) return base.value;

    // not in the config? Okay then, let's see all the
    // options we have
    const result = await Git().branch({'--merged': 'HEAD'});

    const answer = await inquirer.prompt([
        {
            name: 'base',
            message: 'base branch: ',
            type: 'list',
            choices: result.all,
        }
    ]);

    return answer.base;
}

module.exports = async (yargs) => {

    await checkWorkspaceClean();

    const {branch,upstream} = yargs;

    const base = yargs.base ?? await getBaseBranch(upstream);

    report.list('setup', ['branch','upstream','base'],{
        branch,
        upstream,
        base,
    });

    report.info(`branching ${branch} off ${base}`);

    await Git().checkoutBranch(branch,base);

    await Git().addConfig( `branch.${branch}.mikado-base`, base );
    await Git().addConfig( `branch.${branch}.mikado-upstream`, upstream );

    report.success('done!');
}