function normalizeId(s) {
	return String(s || "")
		.toLowerCase()
		.replace(/[^a-z0-9]+/g, "");
}

// Map normalized store *labels* to canonical ids used by OVERRIDES
const ALIASES = {
	strathliquor: "strath",
	vesselliquor: "vessel",
	tudorhouse: "tudor",
	coopworldofwhisky: "coop",

	kensingtonwinemarket: "kensingtonwinemarket",
	gullliquor: "gullliquor",
	legacyliquor: "legacyliquor",
	vintagespirits: "vintagespirits",
	kegncork: "kegncork",

	// short forms
	gull: "gullliquor",
	legacy: "legacyliquor",
	vintage: "vintagespirits",
	kwm: "kensingtonwinemarket",
};

// Your pinned colors
const OVERRIDES = {
	strath: "#76B7FF",
	bsw: "#E9DF7A",
	kensingtonwinemarket: "#F2C200",
	vessel: "#FFFFFF",
	gullliquor: "#6B0F1A",
	kegncork: "#111111",
	legacyliquor: "#7B4A12",
	vintagespirits: "#E34A2C",

	craftcellars: "#E31B23",
	maltsandgrains: "#A67C52",

	// aliases
	gull: "#6B0F1A",
	legacy: "#7B4A12",
	vintage: "#E34A2C",
	kwm: "#F2C200",
};

// High-contrast qualitative palette
const PALETTE = [
	"#1F77B4",
	"#FF7F0E",
	"#2CA02C",
	"#D62728",
	"#9467BD",
	"#8C564B",
	"#E377C2",
	"#7F7F7F",
	"#17BECF",
	"#BCBD22",
	"#AEC7E8",
	"#FFBB78",
	"#98DF8A",
	"#FF9896",
	"#C5B0D5",
	"#C49C94",
	"#F7B6D2",
	"#C7C7C7",
	"#9EDAE5",
	"#DBDB8D",
	"#393B79",
	"#637939",
	"#8C6D31",
	"#843C39",
	"#7B4173",
	"#3182BD",
	"#31A354",
	"#756BB1",
	"#636363",
	"#E6550D",
];

function uniq(arr) {
	return [...new Set(arr)];
}

function canonicalId(s) {
	const id = normalizeId(s);
	return ALIASES[id] || id;
}

function buildUniverse(base, extra) {
	const a = Array.isArray(base) ? base : [];
	const b = Array.isArray(extra) ? extra : [];
	return uniq([...a, ...b].map(canonicalId).filter(Boolean));
}

// Keep mapping stable even if page sees a subset
const DEFAULT_UNIVERSE = buildUniverse(Object.keys(OVERRIDES), [
	"bcl",
	"bsw",
	"coop",
	"craftcellars",
	"gullliquor",
	"gull",
	"kegncork",
	"kwm",
	"kensingtonwinemarket",
	"legacy",
	"legacyliquor",
	"maltsandgrains",
	"sierrasprings",
	"strath",
	"tudor",
	"vessel",
	"vintage",
	"vintagespirits",
	"willowpark",
	"arc",
]);

function isWhiteHex(c) {
	return (
		String(c || "")
			.trim()
			.toUpperCase() === "#FFFFFF"
	);
}

export function buildStoreColorMap(extraUniverse = []) {
	const universe = buildUniverse(DEFAULT_UNIVERSE, extraUniverse).sort();

	const used = new Set();
	const map = new Map();

	// Pin overrides first
	for (const id of universe) {
		const c = OVERRIDES[id];
		if (c) {
			map.set(id, c);
			used.add(String(c).toUpperCase());
		}
	}

	// Filter palette to avoid collisions and keep white/black reserved
	const palette = PALETTE.map((c) => String(c).toUpperCase()).filter(
		(c) => !used.has(c) && c !== "#FFFFFF" && c !== "#111111",
	);

	let pi = 0;
	for (const id of universe) {
		if (map.has(id)) continue;
		if (pi >= palette.length) pi = 0;
		const c = palette[pi++];
		map.set(id, c);
		used.add(c);
	}

	return map;
}

export function storeColor(storeKeyOrLabel, colorMap) {
	const id = canonicalId(storeKeyOrLabel);
	if (!id) return "#7F7F7F";

	const forced = OVERRIDES[id];
	if (forced) return forced;

	if (colorMap && typeof colorMap.get === "function") {
		const c = colorMap.get(id);
		if (c) return c;
	}

	return PALETTE[(id.length + id.charCodeAt(0)) % PALETTE.length];
}

export function datasetStrokeWidth(color) {
	return isWhiteHex(color) ? 2.5 : 1.5;
}

export function datasetPointRadius(color) {
	return isWhiteHex(color) ? 2.8 : 2.2;
}

function clamp(v, lo, hi) {
	return Math.max(lo, Math.min(hi, v));
}

function hexToRgb(hex) {
	const m = String(hex).replace("#", "");
	if (m.length !== 6) return null;
	const n = parseInt(m, 16);
	return {
		r: (n >> 16) & 255,
		g: (n >> 8) & 255,
		b: n & 255,
	};
}

function rgbToHex({ r, g, b }) {
	const h = (x) => clamp(Math.round(x), 0, 255).toString(16).padStart(2, "0");
	return `#${h(r)}${h(g)}${h(b)}`;
}

// Lighten by mixing with white (0–1)
export function lighten(hex, amount = 0.25) {
	const rgb = hexToRgb(hex);
	if (!rgb) return hex;
	return rgbToHex({
		r: rgb.r + (255 - rgb.r) * amount,
		g: rgb.g + (255 - rgb.g) * amount,
		b: rgb.b + (255 - rgb.b) * amount,
	});
}