import { IconLayer, TextLayer } from '@deck.gl/layers';
import type { Layer, PickingInfo } from '@deck.gl/core';
import { svgToDataUri } from '../../utils/svgToDataUri';
import { iranOilFacilities } from '../../data/oilFacilities';
import type { OilFacility, OilFacilityType } from '../../types';

export { type OilFacility };

export const IRAN_OIL_COUNT = iranOilFacilities.length;

const TYPE_COLORS: Record<OilFacilityType, string> = {
  refinery:      '#f59e0b',
  oilfield:      '#10b981',
  gasfield:      '#6366f1',
  terminal:      '#ec4899',
  petrochemical: '#8b5cf6',
  desalination:  '#06b6d4',
};

function refinerySvg(color: string, size: number): string {
  return `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
    <circle cx="12" cy="12" r="10" fill="rgba(0,0,0,0.5)" stroke="${color}" stroke-width="1.2"/>
    <rect x="5" y="10" width="14" height="8" rx="1" fill="${color}" opacity="0.7"/>
    <rect x="7" y="6" width="2" height="5" fill="${color}" opacity="0.6"/>
    <rect x="11" y="4" width="2" height="7" fill="${color}" opacity="0.6"/>
    <rect x="15" y="7" width="2" height="4" fill="${color}" opacity="0.6"/>
  </svg>`;
}

function oilfieldSvg(color: string, size: number): string {
  return `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
    <circle cx="12" cy="12" r="10" fill="rgba(0,0,0,0.5)" stroke="${color}" stroke-width="1.2"/>
    <line x1="6" y1="18" x2="18" y2="18" stroke="${color}" stroke-width="1.5"/>
    <line x1="12" y1="8" x2="8" y2="18" stroke="${color}" stroke-width="1.5"/>
    <line x1="12" y1="8" x2="16" y2="18" stroke="${color}" stroke-width="1.5"/>
    <line x1="5" y1="10" x2="17" y2="9" stroke="${color}" stroke-width="2"/>
    <circle cx="12" cy="8" r="1.5" fill="${color}"/>
  </svg>`;
}

function gasfieldSvg(color: string, size: number): string {
  return `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
    <circle cx="12" cy="12" r="10" fill="rgba(0,0,0,0.5)" stroke="${color}" stroke-width="1.2"/>
    <ellipse cx="12" cy="14" rx="5" ry="4" fill="${color}" opacity="0.6"/>
    <line x1="12" y1="10" x2="12" y2="5" stroke="${color}" stroke-width="1.5"/>
    <path d="M9 7 Q12 4 15 7" fill="none" stroke="${color}" stroke-width="1"/>
    <path d="M10 5.5 Q12 3 14 5.5" fill="none" stroke="${color}" stroke-width="0.8" opacity="0.7"/>
  </svg>`;
}

function terminalSvg(color: string, size: number): string {
  return `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
    <circle cx="12" cy="12" r="10" fill="rgba(0,0,0,0.5)" stroke="${color}" stroke-width="1.2"/>
    <line x1="12" y1="5" x2="12" y2="19" stroke="${color}" stroke-width="1.5"/>
    <path d="M8 9 Q12 6 16 9 Q16 14 12 16 Q8 14 8 9Z" fill="${color}" opacity="0.5"/>
    <path d="M6 16 Q12 20 18 16" fill="none" stroke="${color}" stroke-width="1.2"/>
    <line x1="8" y1="12" x2="16" y2="12" stroke="${color}" stroke-width="1"/>
  </svg>`;
}

function petrochemSvg(color: string, size: number): string {
  return `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
    <circle cx="12" cy="12" r="10" fill="rgba(0,0,0,0.5)" stroke="${color}" stroke-width="1.2"/>
    <rect x="10" y="5" width="4" height="9" rx="1" fill="${color}" opacity="0.6"/>
    <ellipse cx="12" cy="15" rx="4" ry="2.5" fill="${color}" opacity="0.7"/>
    <line x1="7" y1="10" x2="10" y2="10" stroke="${color}" stroke-width="1"/>
    <line x1="14" y1="10" x2="17" y2="10" stroke="${color}" stroke-width="1"/>
    <path d="M7 10 Q6 13 8 15" fill="none" stroke="${color}" stroke-width="0.8"/>
  </svg>`;
}

function desalinationSvg(color: string, size: number): string {
  return `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
    <circle cx="12" cy="12" r="10" fill="rgba(0,0,0,0.5)" stroke="${color}" stroke-width="1.2"/>
    <path d="M12 5 Q16 10 16 14 Q16 18 12 18 Q8 18 8 14 Q8 10 12 5Z" fill="${color}" opacity="0.7"/>
    <path d="M10 14 Q12 16 14 14" fill="none" stroke="#fff" stroke-width="0.8" opacity="0.6"/>
  </svg>`;
}

type SvgFn = (color: string, size: number) => string;

const TYPE_SVG_FN: Record<OilFacilityType, SvgFn> = {
  refinery:      refinerySvg,
  oilfield:      oilfieldSvg,
  gasfield:      gasfieldSvg,
  terminal:      terminalSvg,
  petrochemical: petrochemSvg,
  desalination:  desalinationSvg,
};

const iconCache = new Map<string, string>();

function getIconUrl(type: OilFacilityType): string {
  if (!iconCache.has(type)) {
    const color = TYPE_COLORS[type];
    iconCache.set(type, svgToDataUri(TYPE_SVG_FN[type](color, 64)));
  }
  return iconCache.get(type)!;
}

function hexToRgba(hex: string, alpha = 255): [number, number, number, number] {
  const r = parseInt(hex.slice(1, 3), 16);
  const g = parseInt(hex.slice(3, 5), 16);
  const b = parseInt(hex.slice(5, 7), 16);
  return [r, g, b, alpha];
}

export interface IranOilLayerConfig {
  visible: boolean;
  sc: number;
  fs?: number;
  onPick: (facility: OilFacility) => void;
}

export function createIranOilLayers(config: IranOilLayerConfig): Layer[] {
  const { visible, sc, onPick } = config;
  const fs = config.fs ?? 1;
  if (!visible) return [];

  const iconLayer = new IconLayer<OilFacility>({
    id: 'iran-oil-icon',
    data: iranOilFacilities,
    getPosition: (d) => [d.lng, d.lat],
    getIcon: (d) => ({ url: getIconUrl(d.type), width: 64, height: 64, anchorX: 32, anchorY: 32 }),
    getSize: 18 * sc,
    updateTriggers: { getSize: [sc] },
    pickable: true,
    onClick: (info: PickingInfo<OilFacility>) => {
      if (info.object) onPick(info.object);
      return true;
    },
  });

  const labelLayer = new TextLayer<OilFacility>({
    id: 'iran-oil-label',
    data: iranOilFacilities,
    getPosition: (d) => [d.lng, d.lat],
    getText: (d) => d.nameKo.length > 10 ? d.nameKo.slice(0, 10) + '..' : d.nameKo,
    getSize: 12 * sc * fs,
    updateTriggers: { getSize: [sc] },
    getColor: (d) => hexToRgba(TYPE_COLORS[d.type]),
    getTextAnchor: 'middle',
    getAlignmentBaseline: 'top',
    getPixelOffset: [0, 10],
    fontFamily: 'monospace',
    fontWeight: 600,
    fontSettings: { sdf: true },
        outlineWidth: 8,
    outlineColor: [0, 0, 0, 255],
    billboard: false,
    characterSet: 'auto',
  });

  return [iconLayer, labelLayer];
}