import * as plugins from './npmci.plugins'

let nvmSourceString: string = ''
export let nvmAvailable: boolean = false
let checkNvm = () => {
    if (plugins.shelljs.exec(`bash -c "source /usr/local/nvm/nvm.sh"`,{silent: true}).code === 0) {
        nvmSourceString = `source /usr/local/nvm/nvm.sh && `
        nvmAvailable = true
    } else if (plugins.shelljs.exec(`bash -c "source ~/.nvm/nvm.sh"`,{silent: true}).code === 0) {
        nvmSourceString = `source ~/.nvm/nvm.sh && `
        nvmAvailable = true
    };
}
checkNvm()

/**
 * bash() allows using bash with nvm in path
 * @param commandArg - The command to execute
 * @param retryArg - The retryArg: 0 to any positive number will retry, -1 will always succeed, -2 will return undefined
 */
export let bash = (commandArg: string, retryArg: number = 2, bareArg: boolean = false): string => {
    let exitCode: number
    let stdOut: string
    let execResult
    let failOnError: boolean = true
    if (retryArg === -1) {
        failOnError = false
        retryArg = 0
    }
    if (!process.env.NPMTS_TEST) { // NPMTS_TEST is used during testing
        for (let i = 0; i <= retryArg; i++) {
            if (!bareArg) {
                execResult = plugins.shelljs.exec(
                    `bash -c "${nvmSourceString} ${commandArg}"`
                )
            } else {
                execResult = plugins.shelljs.exec(commandArg)
            }
            exitCode = execResult.code
            stdOut = execResult.stdout

            // determine how bash reacts to error and success
            if (exitCode !== 0 && i === retryArg) { // something went wrong and retries are exhausted
                if (failOnError) {
                    process.exit(1)
                }
            } else if (exitCode === 0) { // everything went fine, or no error wanted
                i = retryArg + 1 // retry +1 breaks for loop, if everything works out ok retrials are not wanted
            } else {
                plugins.beautylog.warn('Something went wrong! Exit Code: ' + exitCode.toString())
                plugins.beautylog.info('Retry ' + (i + 1).toString() + ' of ' + retryArg.toString())
            }
        }
    } else {
        plugins.beautylog.log('ShellExec would be: ' + commandArg)
    }
    return stdOut
}

/**
 * bashBare allows usage of bash without sourcing any files like nvm
 */
export let bashBare = (commandArg: string, retryArg: number = 2) => {
    return bash(commandArg, retryArg, true)
}

/**
 * bashNoError allows executing stuff without throwing an error
 */
export let bashNoError = (commandArg: string): string => {
    return bash(commandArg, -1)
}