document.addEventListener("DOMContentLoaded", (event) => {
	const recipes = document.querySelectorAll(".recipe");

	for (const recipe of recipes) {
		recipe.checked =
			localStorage.getItem("kh1-synth-" + recipe.id) === "true" ?? false;
		update_synth_completions(recipe);

		recipe.addEventListener("input", function () {
			localStorage.setItem("kh1-synth-" + this.id, this.checked);
			update_synth_completions(this);
			calc_total_ingredients();
		});
	}

	const recipes_labels = document.querySelectorAll(".recipe-wrapper > label");
	for (const label of recipes_labels) {
		label.addEventListener("mouseenter", function () {
			highlight_ingredients(this);
		});
	}

	calc_total_ingredients();
});

function update_synth_completions(recipe) {
	if (recipe.checked) {
		recipe.parentElement.classList.add("complete");
	} else {
		recipe.parentElement.classList.remove("complete");
	}
}

function highlight_ingredients(label) {
	let mats = [];
	const ingredients = label.querySelectorAll("ul li");
	const checkbox = label.parentElement.querySelectorAll(".recipe")[0];

	const elems = document.querySelectorAll("#mats ul li");

	if (checkbox.checked) {
		for (const elem of elems) {
			elem.style.color = "#fff";
		}
		return;
	}

	for (const ingredient of ingredients) {
		const name = ingredient.dataset["synthItemName"];
		mats.push(name);
	}

	for (const elem of elems) {
		const isCrossed = elem.style.textDecoration === "line-through";
		if (isCrossed) {
			continue;
		}
		elem.style.color = "#fff";
		for (const mat of mats) {
			if (elem.innerHTML.includes(mat)) {
				elem.style.color = "limegreen";
			}
		}
	}
}

function calc_total_ingredients() {
	const needed = new Map();
	const recipes = document.querySelectorAll(".recipe");

	for (const recipe of recipes) {
		const isComplete = recipe.checked;
		if (isComplete) {
			continue;
		}

		const ingredients =
			recipe.parentElement.querySelectorAll("label ul li");
		for (const ingredient of ingredients) {
			let name = ingredient.dataset["synthItemName"];
			let amount = Number(ingredient.dataset["synthItemAmount"]);

			if (needed.has(name)) {
				let new_amount = Number(needed.get(name)) + amount;
				needed.set(name, new_amount);
			} else {
				needed.set(name, amount);
			}
		}
	}

	const sortedMap = new Map([...needed].sort((a, b) => b[1] - a[1]));

	// generating the new list with materials needed
	const matsList = document.getElementById("mats");
	matsList.innerHTML = "<h1>Materials Needed</h1>";
	const uiList = document.createElement("ul");
	for (const entry of sortedMap) {
		const liElem = document.createElement("li");
		liElem.innerHTML = entry[0] + " x" + entry[1];
		liElem.addEventListener("click", function () {
			const isCrossed = this.style.textDecoration === "line-through";
			this.style.textDecoration = isCrossed ? "none" : "line-through";
			this.style.color = isCrossed ? "#fff" : "#f00";
		});

		uiList.appendChild(liElem);
	}
	matsList.appendChild(uiList);
}