import path from 'path'

import { Command } from '@oclif/command'
import chalk from 'chalk'
import { existsSync } from 'fs-extra'

import { getSalesAppMonorepoDir, getTempDir } from '../utils/directory'
import { logger } from '../utils/logger'
import { getWebpackCompiler } from '../utils/webpack'
import { createTempDir } from '../utils/createTempDir'

export default class Build extends Command {
  public static description = 'Build your Sales App Extension Points'

  public static examples: string[] | undefined = ['$ sales-app build {account}']

  public static args = [
    {
      name: 'account',
      description: 'your VTEX account',
      required: true,
    },
  ]

  public async run() {
    const { args } = this.parse(Build)

    const monorepoDir = getSalesAppMonorepoDir(args.account)

    const salesAppMonorepoSrcDir = path.join(monorepoDir, 'src')

    if (!existsSync(salesAppMonorepoSrcDir)) {
      logger.log(
        `${chalk.red(
          'Error'
        )} - Sales App project not created. Please run "sales-app create" first`
      )

      return
    }

    const tempDir = getTempDir(monorepoDir)

    if (!existsSync(tempDir)) {
      await createTempDir(monorepoDir)
    }

    const { compiler } = getWebpackCompiler(monorepoDir, 'production')

    compiler.run((err: Error | null) => {
      if (err) {
        logger.log(
          `${chalk.red('Error')} - Failed to execute build command: ${
            err?.message
          }`
        )
      } else {
        this.log(`${chalk.green('Success')} - Build completed and saved at:`)
        this.log(path.join(tempDir, 'build'))
      }

      compiler.close((closeErr: Error | null) => {
        logger.log(closeErr?.message)
      })
    })
  }
}