import { AppColorScheme, ColorPalette } from '../types';

interface SchemeColors {
  text: string;
  textSecondary: string;
  textMuted: string;
  textOnImage: string;
  background: string;
  surface: string;
  surfaceMuted: string;
  surfaceStrong: string;
  border: string;
  borderStrong: string;
  overlay: string;
  overlayStrong: string;
  heroButton: string;
  heroButtonBorder: string;
  tabBarBg: string;
  tabBarBorder: string;
  inputBg: string;
  inputBorder: string;
  cardBg: string;
  cardBorder: string;
  cardShadow: string;
  chipBg: string;
  chipBorder: string;
  pageBase: string;
  pageGradientStart: string;
  pageGradientEnd: string;
  pageTexture: string;
}

interface PaletteColors {
  primary: string;
  primaryDark: string;
  info: string;
  warning: string;
  danger: string;
  success: string;
  accent: string;
}

interface PaletteSurfaceTone {
  background: string;
  surface: string;
  surfaceMuted: string;
  surfaceStrong: string;
  border: string;
  borderStrong: string;
  tabBarBg: string;
  tabBarBorder: string;
  pageBase: string;
  pageGradientStart: string;
  pageGradientEnd: string;
  pageTexture: string;
}

interface PaletteThemeTone {
  light: PaletteSurfaceTone;
  dark: PaletteSurfaceTone;
}

export interface AppColors extends SchemeColors, PaletteColors {
  onPrimary: string;
  primarySoft: string;
  infoSoft: string;
  warningSoft: string;
  dangerSoft: string;
  successSoft: string;
  primaryTint: string;
  infoTint: string;
  warningTint: string;
  dangerTint: string;
  successTint: string;
  mutedChip: string;
  fabBg: string;
  fabShadow: string;
  iconOnImage: string;
}

const textByScheme: Record<
  AppColorScheme,
  Pick<SchemeColors, 'text' | 'textSecondary' | 'textMuted' | 'textOnImage' | 'overlay' | 'overlayStrong'>
> = {
  light: {
    text: '#1f2520',
    textSecondary: '#4d5650',
    textMuted: '#6e7871',
    textOnImage: '#f7f8f7',
    overlay: 'rgba(16, 20, 17, 0.4)',
    overlayStrong: 'rgba(13, 17, 14, 0.78)',
  },
  dark: {
    text: '#f0f3f1',
    textSecondary: '#c9d0cb',
    textMuted: '#a1aba4',
    textOnImage: '#f5f7f6',
    overlay: 'rgba(9, 11, 10, 0.52)',
    overlayStrong: 'rgba(8, 10, 9, 0.86)',
  },
};

const paletteSurfaces: Record<ColorPalette, PaletteThemeTone> = {
  forest: {
    light: {
      background: '#ecf3ed',
      surface: '#f5faf6',
      surfaceMuted: '#e4ede6',
      surfaceStrong: '#d8e3d9',
      border: '#c7d4c8',
      borderStrong: '#b3c4b5',
      tabBarBg: '#f1f7f2',
      tabBarBorder: '#ccd9ce',
      pageBase: '#e9f1ea',
      pageGradientStart: '#dde9de',
      pageGradientEnd: '#f1f5f0',
      pageTexture: '#4b6a50',
    },
    dark: {
      background: '#111813',
      surface: '#17211a',
      surfaceMuted: '#1d2920',
      surfaceStrong: '#243128',
      border: '#2b3a2f',
      borderStrong: '#394c3d',
      tabBarBg: '#141d17',
      tabBarBorder: '#2f4033',
      pageBase: '#111813',
      pageGradientStart: '#15211a',
      pageGradientEnd: '#0f1511',
      pageTexture: '#91b196',
    },
  },
  ocean: {
    light: {
      background: '#ebf1f8',
      surface: '#f4f8fc',
      surfaceMuted: '#e1e8f1',
      surfaceStrong: '#d4deeb',
      border: '#c2cfde',
      borderStrong: '#acbdd1',
      tabBarBg: '#eef4fa',
      tabBarBorder: '#c8d6e6',
      pageBase: '#e9f0f7',
      pageGradientStart: '#d9e3f0',
      pageGradientEnd: '#eef3f8',
      pageTexture: '#4c6480',
    },
    dark: {
      background: '#10171f',
      surface: '#16202b',
      surfaceMuted: '#1c2734',
      surfaceStrong: '#243143',
      border: '#2c3b4d',
      borderStrong: '#3a4e64',
      tabBarBg: '#131c26',
      tabBarBorder: '#324357',
      pageBase: '#10171f',
      pageGradientStart: '#152230',
      pageGradientEnd: '#0f151d',
      pageTexture: '#96aac2',
    },
  },
  sunset: {
    light: {
      background: '#f7eee8',
      surface: '#fdf7f3',
      surfaceMuted: '#f2e5da',
      surfaceStrong: '#ead8c8',
      border: '#dbc4b1',
      borderStrong: '#cfb197',
      tabBarBg: '#f9f0e8',
      tabBarBorder: '#decaB9',
      pageBase: '#f6ece4',
      pageGradientStart: '#efdccd',
      pageGradientEnd: '#f8f1eb',
      pageTexture: '#8a644e',
    },
    dark: {
      background: '#1b1410',
      surface: '#271c16',
      surfaceMuted: '#31231b',
      surfaceStrong: '#3f2d22',
      border: '#4a372a',
      borderStrong: '#604633',
      tabBarBg: '#231913',
      tabBarBorder: '#553d2c',
      pageBase: '#1a1410',
      pageGradientStart: '#2a1d15',
      pageGradientEnd: '#16110d',
      pageTexture: '#c8a690',
    },
  },
  mono: {
    light: {
      background: '#eff1f3',
      surface: '#f7f8fa',
      surfaceMuted: '#e5e8ec',
      surfaceStrong: '#d8dde3',
      border: '#c8ced6',
      borderStrong: '#b4bdc8',
      tabBarBg: '#f2f4f7',
      tabBarBorder: '#cdd3db',
      pageBase: '#eceff2',
      pageGradientStart: '#dfe4ea',
      pageGradientEnd: '#f2f4f6',
      pageTexture: '#666f7b',
    },
    dark: {
      background: '#131518',
      surface: '#1b1f24',
      surfaceMuted: '#232932',
      surfaceStrong: '#2d3540',
      border: '#343f4c',
      borderStrong: '#455364',
      tabBarBg: '#171b20',
      tabBarBorder: '#3a4552',
      pageBase: '#131518',
      pageGradientStart: '#1a2028',
      pageGradientEnd: '#111418',
      pageTexture: '#a1adbc',
    },
  },
};

const palettes: Record<ColorPalette, PaletteColors> = {
  forest: {
    primary: '#5fa779',
    primaryDark: '#3d7f57',
    info: '#4e7fb3',
    warning: '#bb8a36',
    danger: '#be5d5d',
    success: '#4f9767',
    accent: '#4a8e7f',
  },
  ocean: {
    primary: '#5a90be',
    primaryDark: '#3d6f99',
    info: '#4e79b1',
    warning: '#bc8b37',
    danger: '#be6464',
    success: '#4f8b80',
    accent: '#4f8fa0',
  },
  sunset: {
    primary: '#c98965',
    primaryDark: '#a36442',
    info: '#6c89b4',
    warning: '#bd8742',
    danger: '#b8666d',
    success: '#769f6e',
    accent: '#b47453',
  },
  mono: {
    primary: '#7b8796',
    primaryDark: '#5b6574',
    info: '#748498',
    warning: '#9d8b5a',
    danger: '#a86868',
    success: '#6f8b75',
    accent: '#6c7785',
  },
};

const hexToRgb = (hex: string) => {
  const cleaned = hex.replace('#', '');
  const normalized =
    cleaned.length === 3
      ? cleaned
        .split('')
        .map((char) => `${char}${char}`)
        .join('')
      : cleaned;
  const int = Number.parseInt(normalized, 16);
  return {
    r: (int >> 16) & 255,
    g: (int >> 8) & 255,
    b: int & 255,
  };
};

const withOpacity = (hex: string, opacity: number) => {
  const { r, g, b } = hexToRgb(hex);
  return `rgba(${r}, ${g}, ${b}, ${opacity})`;
};

const mixColors = (baseHex: string, tintHex: string, tintWeight: number) => {
  const base = hexToRgb(baseHex);
  const tint = hexToRgb(tintHex);
  const weight = Math.max(0, Math.min(1, tintWeight));
  const r = Math.round(base.r + (tint.r - base.r) * weight);
  const g = Math.round(base.g + (tint.g - base.g) * weight);
  const b = Math.round(base.b + (tint.b - base.b) * weight);
  return `rgb(${r}, ${g}, ${b})`;
};

const getOnColor = (hex: string) => {
  const { r, g, b } = hexToRgb(hex);
  const luminance = (0.2126 * r + 0.7152 * g + 0.0722 * b) / 255;
  return luminance > 0.58 ? '#111111' : '#ffffff';
};

export const useColors = (
  isDark: boolean,
  palette: ColorPalette = 'forest'
): AppColors => {
  const schemeKey: AppColorScheme = isDark ? 'dark' : 'light';
  const textColors = textByScheme[schemeKey];
  const paletteColors = palettes[palette];
  const tone = paletteSurfaces[palette][schemeKey];

  return {
    ...textColors,
    ...paletteColors,
    background: tone.background,
    surface: tone.surface,
    surfaceMuted: tone.surfaceMuted,
    surfaceStrong: tone.surfaceStrong,
    border: tone.border,
    borderStrong: tone.borderStrong,
    tabBarBg: tone.tabBarBg,
    tabBarBorder: tone.tabBarBorder,
    inputBg: tone.surfaceMuted,
    inputBorder: tone.borderStrong,
    cardBg: withOpacity(tone.surface, isDark ? 0.9 : 0.92),
    cardBorder: withOpacity(tone.borderStrong, isDark ? 0.7 : 0.82),
    cardShadow: withOpacity('#000000', isDark ? 0.26 : 0.12),
    chipBg: tone.surfaceStrong,
    chipBorder: tone.border,
    pageBase: tone.pageBase,
    pageGradientStart: withOpacity(tone.pageGradientStart, isDark ? 0.44 : 0.52),
    pageGradientEnd: withOpacity(tone.pageGradientEnd, isDark ? 0.34 : 0.44),
    pageTexture: withOpacity(tone.pageTexture, isDark ? 0.09 : 0.07),
    overlay: textColors.overlay,
    overlayStrong: textColors.overlayStrong,
    heroButton: withOpacity(tone.surface, isDark ? 0.9 : 0.94),
    heroButtonBorder: withOpacity(tone.borderStrong, isDark ? 0.7 : 0.8),
    onPrimary: getOnColor(paletteColors.primary),
    primarySoft: withOpacity(paletteColors.primary, isDark ? 0.26 : 0.18),
    infoSoft: withOpacity(paletteColors.info, isDark ? 0.24 : 0.16),
    warningSoft: withOpacity(paletteColors.warning, isDark ? 0.24 : 0.18),
    dangerSoft: withOpacity(paletteColors.danger, isDark ? 0.2 : 0.14),
    successSoft: withOpacity(paletteColors.success, isDark ? 0.2 : 0.14),
    primaryTint: mixColors(tone.surfaceStrong, paletteColors.primary, isDark ? 0.22 : 0.2),
    infoTint: mixColors(tone.surfaceStrong, paletteColors.info, isDark ? 0.2 : 0.18),
    warningTint: mixColors(tone.surfaceStrong, paletteColors.warning, isDark ? 0.22 : 0.2),
    dangerTint: mixColors(tone.surfaceStrong, paletteColors.danger, isDark ? 0.2 : 0.18),
    successTint: mixColors(tone.surfaceStrong, paletteColors.success, isDark ? 0.2 : 0.18),
    mutedChip: tone.surfaceStrong,
    fabBg: paletteColors.primary,
    fabShadow: withOpacity(paletteColors.primaryDark, 0.75),
    iconOnImage: '#ffffff',
  };
};