import type { SymbolDef } from './types.js';
import { EPC_CONFIG, INDUCTION_CONFIG, CURVE_CONFIG, PHOTOEYE_CONFIG } from './symbol-config.js';
export { EPC_CONFIG, INDUCTION_CONFIG, CURVE_CONFIG, PHOTOEYE_CONFIG };

export const SYMBOLS: SymbolDef[] = [
  // --- Conveyance > Conveyor ---
  { id: 'conveyor',       name: 'Conveyor',         file: '/symbols/conveyor.svg',            w: 154, h: 30, group: 'Conveyance', subgroup: 'Conveyor' },
  { id: 'conveyor_v',     name: 'Conveyor (V)',      file: '/symbols/conveyor.svg',            w: 154, h: 30, defaultRotation: 90, group: 'Conveyance', subgroup: 'Conveyor' },
  { id: 'curved_conv_30', name: 'Curve 30\u00B0',    file: '/symbols/curved_conveyor_30.svg',  w: 154, h: 154, group: 'Conveyance', subgroup: 'Conveyor', curveAngle: 30 },
  { id: 'curved_conv_45', name: 'Curve 45\u00B0',    file: '/symbols/curved_conveyor_45.svg',  w: 154, h: 154, group: 'Conveyance', subgroup: 'Conveyor', curveAngle: 45 },
  { id: 'curved_conv_60', name: 'Curve 60\u00B0',    file: '/symbols/curved_conveyor_60.svg',  w: 154, h: 154, group: 'Conveyance', subgroup: 'Conveyor', curveAngle: 60 },
  { id: 'curved_conv_90', name: 'Curve 90\u00B0',    file: '/symbols/curved_conveyor_90.svg',  w: 154, h: 154, group: 'Conveyance', subgroup: 'Conveyor', curveAngle: 90 },

  // --- Conveyance > Chute ---
  { id: 'chute',          name: 'Chute',             file: '/symbols/chute.svg',               w: 68,  h: 30, group: 'Conveyance', subgroup: 'Chute' },
  { id: 'chute_v',        name: 'Chute (V)',         file: '/symbols/chute.svg',               w: 68,  h: 30, defaultRotation: 90, group: 'Conveyance', subgroup: 'Chute' },
  { id: 'tipper',         name: 'Tipper',            file: '/symbols/tipper.svg',              w: 68,  h: 30, group: 'Conveyance', subgroup: 'Chute' },
  { id: 'tipper_v',       name: 'Tipper (V)',        file: '/symbols/tipper.svg',              w: 68,  h: 30, defaultRotation: 90, group: 'Conveyance', subgroup: 'Chute' },
  { id: 'curved_chute_30', name: 'C.Chute 30\u00B0', file: '/symbols/curved_chute_30.svg',    w: 100, h: 100, group: 'Conveyance', subgroup: 'Chute', curveAngle: 30 },
  { id: 'curved_chute_45', name: 'C.Chute 45\u00B0', file: '/symbols/curved_chute_45.svg',    w: 100, h: 100, group: 'Conveyance', subgroup: 'Chute', curveAngle: 45 },
  { id: 'curved_chute_60', name: 'C.Chute 60\u00B0', file: '/symbols/curved_chute_60.svg',    w: 100, h: 100, group: 'Conveyance', subgroup: 'Chute', curveAngle: 60 },
  { id: 'curved_chute_90', name: 'C.Chute 90\u00B0', file: '/symbols/curved_chute_90.svg',    w: 100, h: 100, group: 'Conveyance', subgroup: 'Chute', curveAngle: 90 },

  // --- Conveyance > Other ---
  { id: 'spur',           name: 'Spur',              file: '/symbols/spur.svg',                w: 80,  h: 30, w2: 40, group: 'Conveyance', subgroup: 'Other' },
  { id: 'spur_v',         name: 'Spur (V)',          file: '/symbols/spur.svg',                w: 80,  h: 30, w2: 40, defaultRotation: 90, group: 'Conveyance', subgroup: 'Other' },
  { id: 'extendo',        name: 'Extendo',           file: '/symbols/extendo.svg',             w: 73,  h: 54, group: 'Conveyance', subgroup: 'Other' },
  { id: 'extendo_v',      name: 'Extendo (V)',       file: '/symbols/extendo.svg',             w: 73,  h: 54, defaultRotation: 90, group: 'Conveyance', subgroup: 'Other' },
  { id: 'induction',      name: 'Induction',         file: '/symbols/induction.svg',           w: 154, h: 75, group: 'Conveyance', subgroup: 'Other' },
  { id: 'induction_v',    name: 'Induction (V)',     file: '/symbols/induction.svg',           w: 154, h: 75, defaultRotation: 90, group: 'Conveyance', subgroup: 'Other' },
  { id: 'diverter',       name: 'Diverter',          file: '/symbols/diverter.svg',            w: 31,  h: 20, group: 'Conveyance', subgroup: 'Other' },
  { id: 'diverter_v',     name: 'Diverter (V)',      file: '/symbols/diverter.svg',            w: 31,  h: 20, defaultRotation: 90, group: 'Conveyance', subgroup: 'Other' },

  // --- I/O Modules ---
  { id: 'fio_sio_fioh',   name: 'FIO/SIO/FIOH',     file: '/symbols/fio_sio_fioh.svg',        w: 14, h: 20, group: 'I/O Modules' },
  { id: 'fio_sio_fioh_v', name: 'FIO/SIO/FIOH (V)', file: '/symbols/fio_sio_fioh.svg',        w: 14, h: 20, defaultRotation: 90, group: 'I/O Modules' },

  // --- Sensors ---
  { id: 'photoeye',       name: 'Photoeye',          file: '/symbols/photoeye.svg',            w: 30,  h: 14, group: 'Sensors' },
  { id: 'photoeye_v',     name: 'Photoeye (V)',      file: '/symbols/photoeye.svg',            w: 30,  h: 14, defaultRotation: 90, group: 'Sensors' },
  { id: 'pressure_sensor', name: 'Pressure Sensor',  file: '/symbols/pressure_sensor.svg',     w: 20, h: 20, group: 'Sensors' },
  { id: 'pressure_sensor_v', name: 'Pressure Sensor (V)', file: '/symbols/pressure_sensor.svg', w: 20, h: 20, defaultRotation: 90, group: 'Sensors' },

  // --- Controls ---
  { id: 'jam_reset',      name: 'Jam Reset (JR)',    file: '/symbols/jam_reset.svg',           w: 20,  h: 20, group: 'Controls' },
  { id: 'jam_reset_v',    name: 'Jam Reset (V)',     file: '/symbols/jam_reset.svg',           w: 20,  h: 20, defaultRotation: 90, group: 'Controls' },
  { id: 'start',          name: 'Start (S)',         file: '/symbols/start.svg',               w: 20,  h: 20, group: 'Controls' },
  { id: 'start_v',        name: 'Start (V)',         file: '/symbols/start.svg',               w: 20,  h: 20, defaultRotation: 90, group: 'Controls' },
  { id: 'start_stop',     name: 'Start Stop (SS)',   file: '/symbols/start_stop.svg',          w: 40,  h: 20, group: 'Controls' },
  { id: 'start_stop_v',   name: 'Start Stop (V)',    file: '/symbols/start_stop.svg',          w: 40,  h: 20, defaultRotation: 90, group: 'Controls' },
  { id: 'chute_enable',   name: 'Chute Enable',      file: '/symbols/chute_enable.svg',        w: 20, h: 20, group: 'Controls' },
  { id: 'chute_enable_v', name: 'Chute Enable (V)',  file: '/symbols/chute_enable.svg',        w: 20, h: 20, defaultRotation: 90, group: 'Controls' },
  { id: 'package_release', name: 'Package Release',  file: '/symbols/package_release.svg',     w: 20, h: 20, group: 'Controls' },
  { id: 'package_release_v', name: 'Package Release (V)', file: '/symbols/package_release.svg', w: 20, h: 20, defaultRotation: 90, group: 'Controls' },
  { id: 'beacon',         name: 'Beacon',            file: '/symbols/beacon.svg',              w: 20, h: 20, group: 'Controls' },
  { id: 'beacon_v',       name: 'Beacon (V)',        file: '/symbols/beacon.svg',              w: 20, h: 20, defaultRotation: 90, group: 'Controls' },
  { id: 'solenoid',       name: '[SOL]',             file: '/symbols/solenoid.svg',            w: 20, h: 20, group: 'Controls' },
  { id: 'solenoid_v',     name: '[SOL] (V)',         file: '/symbols/solenoid.svg',            w: 20, h: 20, defaultRotation: 90, group: 'Controls' },

  // --- Other ---
  { id: 'pdp',            name: 'PDP',               file: '/symbols/pdp.svg',                 w: 20,  h: 20, group: 'Other' },
  { id: 'pdp_v',          name: 'PDP (V)',           file: '/symbols/pdp.svg',                 w: 20,  h: 20, defaultRotation: 90, group: 'Other' },
  { id: 'dpm',            name: 'DPM',               file: '/symbols/dpm.svg',                 w: 35,  h: 20, group: 'Other' },
  { id: 'dpm_v',          name: 'DPM (V)',           file: '/symbols/dpm.svg',                 w: 35,  h: 20, defaultRotation: 90, group: 'Other' },
  { id: 'mcm',            name: 'MCM',               file: '/symbols/mcm.svg',                 w: 60,  h: 20, group: 'Other' },
  { id: 'mcm_v',          name: 'MCM (V)',           file: '/symbols/mcm.svg',                 w: 60,  h: 20, defaultRotation: 90, group: 'Other' },
  { id: 'epc',            name: 'EPC',               file: '/symbols/epc.svg',                 w: 67,  h: 20, group: 'Other' },
  { id: 'epc_v',          name: 'EPC (V)',           file: '/symbols/epc.svg',                 w: 67,  h: 20, defaultRotation: 90, group: 'Other' },
  { id: 'ip_camera',      name: 'IP Camera',         file: '/symbols/ip_camera.svg',           w: 20,  h: 20, group: 'Other' },
  { id: 'ip_camera_v',    name: 'IP Camera (V)',     file: '/symbols/ip_camera.svg',           w: 20,  h: 20, defaultRotation: 90, group: 'Other' },
];

export const SYMBOL_GROUPS = [...new Set(SYMBOLS.map(s => s.group))];

const SYMBOL_GROUP_MAP = new Map(SYMBOLS.map(s => [s.id, s.group]));
export function getSymbolGroup(symbolId: string): string {
  return SYMBOL_GROUP_MAP.get(symbolId) || '';
}

export const PRIORITY_TYPES = new Set([
  'conveyor', 'conveyor_v', 'chute', 'chute_v',
  'tipper', 'tipper_v', 'extendo', 'extendo_v',
  'induction', 'induction_v',
  'curved_conv_30', 'curved_conv_45', 'curved_conv_60', 'curved_conv_90',
  'curved_chute_30', 'curved_chute_45', 'curved_chute_60', 'curved_chute_90',
  'spur', 'spur_v',
  'photoeye', 'photoeye_v',
]);

// Overlay types: exempt from spacing — can be placed freely on top of anything
export const SPACING_EXEMPT = new Set([
  'photoeye', 'photoeye_v',
  'fio_sio_fioh', 'fio_sio_fioh_v',
]);


/** Get the fixed band width for a curved symbol (same as straight segment height) */
export function getCurveBandWidth(symbolId: string): number {
  if (symbolId.startsWith('curved_chute')) return CURVE_CONFIG.chuteBandWidth;
  return CURVE_CONFIG.convBandWidth;
}

/** Compute arc center and radii in display coordinates.
 *  Band width is fixed — only the radius changes when resizing. */
export function getCurveGeometry(symbolId: string, x: number, y: number, w: number, h: number) {
  const arcCx = x + CURVE_CONFIG.centerOffsetX * w;
  const arcCy = y + CURVE_CONFIG.centerOffsetY * h;
  const outerR = CURVE_CONFIG.outerRFrac * w;
  const bandW = getCurveBandWidth(symbolId);
  const innerR = Math.max(0, outerR - bandW);
  return { arcCx, arcCy, outerR, innerR, bandW };
}

const imageCache = new Map<string, HTMLImageElement>();
const SVG_SCALE = 10; // Rasterize SVGs at 10x for crisp canvas rendering

async function loadSvgImage(file: string): Promise<void> {
  if (imageCache.has(file)) return;
  try {
    const resp = await fetch(file);
    const svgText = await resp.text();
    const scaled = svgText.replace(
      /<svg([^>]*)\bwidth="([^"]*)"([^>]*)\bheight="([^"]*)"/,
      (_, before, w, mid, h) =>
        `<svg${before}width="${parseFloat(w) * SVG_SCALE}"${mid}height="${parseFloat(h) * SVG_SCALE}"`
    );
    const blob = new Blob([scaled], { type: 'image/svg+xml' });
    const url = URL.createObjectURL(blob);
    const img = new Image();
    await new Promise<void>((resolve) => {
      img.onload = () => { URL.revokeObjectURL(url); imageCache.set(file, img); resolve(); };
      img.onerror = () => { URL.revokeObjectURL(url); resolve(); };
      img.src = url;
    });
  } catch {
    console.warn(`Failed to load symbol image: ${file}`);
  }
}

export function preloadSymbolImages(): Promise<void[]> {
  const uniqueFiles = [...new Set(SYMBOLS.map(s => s.file)), EPC_CONFIG.iconFile];
  return Promise.all(uniqueFiles.map(loadSvgImage));
}

export function getSymbolImage(file: string): HTMLImageElement | undefined {
  return imageCache.get(file);
}

export function isCurvedType(symbolId: string): boolean {
  return symbolId.startsWith('curved_');
}

export function isSpurType(symbolId: string): boolean {
  return symbolId === 'spur' || symbolId === 'spur_v';
}

export function isEpcType(symbolId: string): boolean {
  return symbolId === 'epc' || symbolId === 'epc_v';
}

export function isInductionType(symbolId: string): boolean {
  return symbolId === 'induction' || symbolId === 'induction_v';
}

export function isPhotoeyeType(symbolId: string): boolean {
  return symbolId === 'photoeye' || symbolId === 'photoeye_v';
}

/** Simple rectangular conveyance types drawn programmatically for consistent stroke */
const RECT_CONVEYANCE = new Set([
  'conveyor', 'conveyor_v', 'chute', 'chute_v', 'tipper', 'tipper_v',
]);
export function isRectConveyanceType(symbolId: string): boolean {
  return RECT_CONVEYANCE.has(symbolId);
}

export function isExtendoType(symbolId: string): boolean {
  return symbolId === 'extendo' || symbolId === 'extendo_v';
}


export function isResizable(symbolId: string): boolean {
  return PRIORITY_TYPES.has(symbolId);
}