const { flavors, version: versionPalette } = require('@catppuccin/palette')
const { version: versionPackage } = require('./package.json')
const fs = require('node:fs/promises');

const [PREFIX = ''] = process.argv.slice(2)

const INDENTATION = '  '
const COLOR_TYPE_HEX = 'hex'
const COLOR_TYPE_RGB = 'rgb'
const COLOR_TYPE_HSL = 'hsl'
const COLOR_TYPES = [COLOR_TYPE_HEX, COLOR_TYPE_RGB, COLOR_TYPE_HSL]

console.log('Generating ./theme CSS files from Catppuccin palette', versionPalette)

COLOR_TYPES.forEach(color_type => {
  console.log('Generating color type', color_type)
  for (const flavorKey in flavors) {
    const { emoji, colors, name } = flavors[flavorKey]
    create_theme(name, color_type, parse_theme(color_type, colors, name, emoji))
  }
})

function parse_theme(color_type, colors, name, emoji) {
  return `/*
Catppuccin CSS Theme v${versionPackage} ${color_type.toUpperCase()} from palette v${versionPalette}
${emoji} ${name}
*/
:root {
${cssClasses(colors, color_type)}
}`
}

async function create_theme(name, color_type, output) {
  try {
    await fs.writeFile(`./themes/Catppuccin-${name}.${color_type}.css`, output)
  } catch (error) {
    console.error(error)
  }
}

function cssClasses(colors, color_type) {
  const LINE_BREAK = '\n'
  let result = []
  for (const colorKey in colors) {
    result.push(cssClass(colors[colorKey].name, colors[colorKey][color_type], color_type))
  }
  return result.join(LINE_BREAK)
}

function cssClass(name, color, color_type) {
  return `${INDENTATION}--${PREFIX.length > 0 ? PREFIX + '-' : ''}${name.toLowerCase()}: ${handle_color_type(color, color_type)};`
}

function handle_color_type(color, color_type) {
  switch (color_type) {
    case COLOR_TYPE_RGB:
      const { r, g, b } = color
      return `rgb(${r}, ${g}, ${b})`
    case COLOR_TYPE_HSL:
      const { h, s, l } = color
      return `hsl(${h}, ${s}, ${l})`
  }
  return color
}