import { NextConfig } from 'next'
import { UnbodyConfig } from './types'
import { createUnbodyDir } from './utils/createUnbodyDir'
import { generateTransformerConfig } from './utils/generateTransformerConfig'
import { loadConfig } from './utils/loadConfig'
import { setupApi } from './utils/setupApi'
import { extendWebpackConfig } from './webpack'

export const withUnbody =
  (unbodyConfig: UnbodyConfig) =>
  async (nextConfig: NextConfig): Promise<NextConfig> => {
    if (nextConfig.output === 'export') {
      throw new Error("unbody-nextra-plugin doesn't support 'export' output.")
    }

    const loadedConfig = loadConfig({
      conf: unbodyConfig,
      nextConfig,
    })
    createUnbodyDir({ config: loadedConfig })
    setupApi({ config: loadedConfig, nextConfig })
    generateTransformerConfig({ config: loadedConfig, nextConfig })

    return {
      ...nextConfig,
      webpack: await extendWebpackConfig({ config: loadedConfig, nextConfig }),
      transpilePackages: [
        ...(nextConfig.transpilePackages || [], 'unbody-nextra-ui'),
      ],
    }
  }