import type { WebFontMeta } from '@unocss/preset-web-fonts'
import type { Preset, PresetOrFactoryAwaitable } from 'unocss'

import { setDefaultAutoSelectFamilyAttemptTimeout } from 'node:net'

import { createExternalPackageIconLoader } from '@iconify/utils/lib/loader/external-pkg'
import { presetChromatic } from '@proj-airi/unocss-preset-chromatic'
import { colorToString } from '@unocss/preset-mini/utils'
import { defineConfig, mergeConfigs, presetAttributify, presetIcons, presetTypography, presetWind3, transformerDirectives, transformerVariantGroup } from 'unocss'
import { presetScrollbar } from 'unocss-preset-scrollbar'
import { parseColor } from 'unocss/preset-mini'

// On Netlify, building will result in when fetching metadata and fonts from @unocss/preset-web-fonts plugin:
//
// [cause]: AggregateError [ETIMEDOUT]:
//    at internalConnectMultiple (node:net:1134:18)
//  code: 'ETIMEDOUT',
//  [errors]: [
//    Error: connect ETIMEDOUT 146.75.77.229:443 ...
//    Error: connect ENETUNREACH 2a04:4e42:83::485:443 - Local (:::0) ...
//  ]
//
// This is same for either Google Fonts or Fontsource as provider. But GitHub Actions and local development works fine.
// My assumption is that the default timeout for auto-selecting family is too short (250ms)[^1] for the implementation
// of the Happy Eyeballs algorithm in Node.js, which is used by the `net` module to connect to the server, workflows
// illustrates like this:
//
// lookupAndConnect > autoSelectFamilyAttemptTimeout > lookupAndConnectMultiple > internalConnectMultiple > defaultTriggerAsyncIdScope
//
// Such mechanism will be used when the `net` module attempts to connect to a server using both IPv4 and IPv6 addresses,
// which is the case for Netlify builder.
//
// In order to fix this issue, we can increase the timeout to 1000ms (1 second) so that the algorithm has more time to
// attempt to connect to the server before timing out.
//
// [^1]: https://github.com/nodejs/node/pull/44731/files#diff-d76469e9e7f555294a7a5488c5c8fc4ef8ce5aea448cc26a1322d1ab693e09caR921
setDefaultAutoSelectFamilyAttemptTimeout(1000)

export function presetStoryMockHover(): PresetOrFactoryAwaitable {
  return {
    name: 'story-mock-hover',
    variants: [
      (matcher) => {
        if (!matcher.includes('hover')) {
          return matcher
        }

        return {
          matcher,
          selector: (s) => {
            return `${s}, ${s.replace(/:hover$/, '')}._hover`
          },
        }
      },
    ],
  }
}

export function safelistAllPrimaryBackgrounds(): string[] {
  return [
    ...[undefined, 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 950].map((shade) => {
      const prefix = shade ? `bg-primary-${shade}` : `bg-primary`
      return [
        prefix,
        ...[5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100].map(opacity => `${prefix}/${opacity}`),
      ]
    }).flat(),
  ]
}

export function presetWebFontsFonts(provider: 'fontsource' | 'none'): Record<string, string | WebFontMeta | (string | WebFontMeta)[]> {
  return {
    'sans': {
      name: provider === 'fontsource' ? 'DM Sans' : 'DM Sans Variable',
      provider,
    },
    'serif': {
      name: 'DM Serif Display',
      provider,
    },
    'mono': {
      name: 'DM Mono',
      provider,
    },
    'cute': {
      name: 'Kiwi Maru',
      provider,
    },
    'cuteen': {
      name: 'Sniglet',
      provider,
    },
    'jura': {
      name: provider === 'fontsource' ? 'Jura' : 'Jura Variable',
      provider,
    },
    'gugi': {
      name: 'Gugi',
      provider,
    },
    'quicksand': {
      name: provider === 'fontsource' ? 'Quicksand' : 'Quicksand Variable',
      provider,
    },
    'urbanist': {
      name: provider === 'fontsource' ? 'Urbanist' : 'Urbanist Variable',
      provider,
    },
    'm-plus-rounded': {
      name: 'M PLUS Rounded 1c',
      provider,
    },
    'quanlai': {
      name: 'cjkfonts AllSeto',
      provider: 'none',
    },
    'xiaolai': {
      name: 'Xiaolai SC',
      provider: 'none',
    },
  }
}

export function sharedUnoConfig() {
  return defineConfig({
    presets: [
      presetWind3(),
      presetAttributify(),
      presetTypography(),
      presetIcons({
        scale: 1.2,
        collections: {
          ...createExternalPackageIconLoader('@proj-airi/lobe-icons'),
        },
      }),
      presetScrollbar(),
      presetChromatic({
        baseHue: 220.44,
        colors: {
          primary: 0,
          complementary: 180,
        },
      }) as Preset,
    ],
    transformers: [
      transformerDirectives({
        applyVariable: ['--at-apply'],
      }),
      transformerVariantGroup(),
    ],
    safelist: [
      ...'prose prose-sm m-auto text-left'.split(' '),
      ...safelistAllPrimaryBackgrounds(),
    ],
    // hyoban/unocss-preset-shadcn: Use shadcn ui with UnoCSS
    // https://github.com/hyoban/unocss-preset-shadcn
    //
    // Thanks to
    // https://github.com/unovue/shadcn-vue/issues/34#issuecomment-2467318118
    // https://github.com/hyoban-template/shadcn-vue-unocss-starter
    //
    // By default, `.ts` and `.js` files are NOT extracted.
    // If you want to extract them, use the following configuration.
    // It's necessary to add the following configuration if you use shadcn-vue or shadcn-svelte.
    content: {
      pipeline: {
        include: [
          // the default
          /\.(vue|svelte|[jt]sx|mdx?|astro|elm|php|phtml|html)($|\?)/,
          // include js/ts files
          '(components|src)/**/*.{js,ts,vue}',
          '**/stage-ui/**/*.{vue,js,ts}',
          '**/ui/**/*.{vue,js,ts}',
        ],
      },
    },
    rules: [
      [/^mask-\[(.*)\]$/, ([, suffix]) => ({ '-webkit-mask-image': suffix.replace(/_/g, ' ') })],
      [/^bg-dotted-\[(.*)\]$/, ([, color], { theme }) => {
        const parsedColor = parseColor(color, theme)
        // Util usage: https://github.com/unocss/unocss/blob/f57ef6ae50006a92f444738e50f3601c0d1121f2/packages-presets/preset-mini/src/_utils/utilities.ts#L186
        return {
          'background-image': `radial-gradient(circle at 1px 1px, ${colorToString(parsedColor?.cssColor ?? parsedColor?.color ?? color, 'var(--un-background-opacity)')} 1px, transparent 0)`,
          '--un-background-opacity': parsedColor?.cssColor?.alpha ?? parsedColor?.alpha ?? 1,
        }
      }],
    ],
  })
}

export function histoireUnoConfig() {
  return defineConfig({
    presets: [
      presetStoryMockHover(),
    ],
  })
}

export default mergeConfigs([
  sharedUnoConfig(),
  histoireUnoConfig(),
])