import {
  RootTheme,
  RootTheme_v2,
  ThemeColor,
  ThemeColorCard_v2,
  ThemeColorInputMode_v2,
  ThemeColorInputState,
  ThemeColorInputState_v2,
  ThemeColorInputStates,
} from '../system'

const cache = new WeakMap<RootTheme_v2, RootTheme>()

/** @internal */
export function v2_v0(v2: RootTheme_v2): RootTheme {
  const cachedTheme = cache.get(v2)

  if (cachedTheme) return cachedTheme

  const {
    avatar,
    button,
    color,
    container,
    font: fonts,
    input,
    media,
    radius,
    shadow: shadows,
    space,
    style: styles,
  } = v2

  return {
    _version: 0,
    avatar,
    button,
    container,
    color: {
      light: {
        transparent: themeColor_v2_v0(color.light.transparent),
        default: themeColor_v2_v0(color.light.default),
        primary: themeColor_v2_v0(color.light.primary),
        positive: themeColor_v2_v0(color.light.positive),
        caution: themeColor_v2_v0(color.light.caution),
        critical: themeColor_v2_v0(color.light.critical),
      },
      dark: {
        transparent: themeColor_v2_v0(color.dark.transparent),
        default: themeColor_v2_v0(color.dark.default),
        primary: themeColor_v2_v0(color.dark.primary),
        positive: themeColor_v2_v0(color.dark.positive),
        caution: themeColor_v2_v0(color.dark.caution),
        critical: themeColor_v2_v0(color.dark.critical),
      },
    },
    focusRing: input.text.focusRing,
    fonts,
    input,
    media,
    radius,
    shadows,
    space,
    styles,

    v2,
  }
}

function themeColor_v2_v0(color_v2: ThemeColorCard_v2): ThemeColor {
  return {
    base: {
      bg: color_v2.bg,
      fg: color_v2.fg,
      border: color_v2.border,
      focusRing: color_v2.focusRing,
      shadow: color_v2.shadow,
    },
    button: color_v2.button,
    card: color_v2.selectable.default,
    dark: color_v2._dark,
    input: {
      default: inputStatesThemeColor_v2_v0(color_v2.input.default),
      invalid: inputStatesThemeColor_v2_v0(color_v2.input.invalid),
    },
    muted: {
      ...color_v2.button.ghost,
      transparent: color_v2.button.ghost.default,
    },
    solid: {
      ...color_v2.button.default,
      transparent: color_v2.button.default.default,
    },
    selectable: color_v2.selectable,
    spot: {
      gray: color_v2.avatar.gray.bg,
      blue: color_v2.avatar.blue.bg,
      purple: color_v2.avatar.purple.bg,
      magenta: color_v2.avatar.magenta.bg,
      red: color_v2.avatar.red.bg,
      orange: color_v2.avatar.orange.bg,
      yellow: color_v2.avatar.yellow.bg,
      green: color_v2.avatar.green.bg,
      cyan: color_v2.avatar.cyan.bg,
    },
    syntax: color_v2.syntax,
  }
}

function inputStatesThemeColor_v2_v0(t: ThemeColorInputMode_v2): ThemeColorInputStates {
  return {
    enabled: inputStateThemeColor_v2_v0(t.enabled),
    disabled: inputStateThemeColor_v2_v0(t.disabled),
    readOnly: inputStateThemeColor_v2_v0(t.readOnly),
    hovered: inputStateThemeColor_v2_v0(t.hovered),
  }
}

function inputStateThemeColor_v2_v0(t: ThemeColorInputState_v2): ThemeColorInputState {
  return {
    bg: t.bg,
    bg2: t.muted.bg,
    border: t.border,
    fg: t.fg,
    placeholder: t.placeholder,
  }
}