// @ts-check

const next = (phase, { defaultConfig }) => {
  /**
   * @type {import('next').NextConfig}
   */
  const nextConfig = {
    webpack: (config, options) => {
      // Grab the existing rule that handles SVG imports
      const fileLoaderRule = config.module.rules.find((rule) =>
        rule.test?.test?.('.svg')
      )

      config.module.rules.push(
        // Reapply the existing rule, but only for svg imports ending in ?url
        {
          ...fileLoaderRule,
          test: /\.svg$/i,
          resourceQuery: /url/ // *.svg?url
        },
        // Convert all other *.svg imports to React components
        {
          test: /\.svg$/i,
          issuer: /\.[jt]sx?$/,
          resourceQuery: { not: /url/ }, // exclude if *.svg?url
          use: [{ loader: '@svgr/webpack', options: { icon: true } }]
        }
      )

      // Modify the file loader rule to ignore *.svg, since we have it handled now.
      fileLoaderRule.exclude = /\.svg$/i

      config.module.rules.push({
        test: /\.gif$/,
        // yay for webpack 5
        // https://webpack.js.org/guides/asset-management/#loading-images
        type: 'asset/resource'
      })

      return typeof defaultConfig.webpack === 'function'
        ? defaultConfig.webpack(config, options)
        : config
    },
    // https://nextjs.org/docs/api-reference/next.config.js/react-strict-mode
    reactStrictMode: true
  }

  return nextConfig
}

export default next