// craft.* — thin skill wrappers around the existing actions.js crafting
// primitives. Each one is generated by makeCraftSkill so adding a new
// craftable is one entry in this file rather than a new module.
//
// All wood/stone crafts that need a workbench reuse actions.placeCraftingTable
// internally: the skill's preconditions guarantee the raw materials, then
// execute() defers to the actions.js implementation that handles
// table-placement, recipe lookup and bot.craft().

import {
	craftPlanks,
	craftSticks,
	craftWoodenAxe,
	craftWoodenPickaxe,
	craftWoodenSword,
	placeCraftingTable,
	inv as invHelpers,
} from "../actions.js";

function totalPlanks(bot) {
	return invHelpers.getAnyPlanksCount(bot);
}
function totalSticks(bot) {
	return invHelpers.getItemCount(bot, "stick");
}
function totalLogs(bot) {
	return invHelpers.getAnyLogCount(bot);
}
function count(bot, name) {
	return invHelpers.getItemCount(bot, name);
}

function withTimeout(promise, ms, label) {
	let timer;
	const timeout = new Promise((_, reject) => {
		timer = setTimeout(() => reject(new Error(`${label} timed out after ${ms / 1000}s`)), ms);
	});
	return Promise.race([promise, timeout]).finally(() => clearTimeout(timer));
}

function asResult(res, doneCode = "done") {
	if (res?.ok) {
		return { ok: true, code: doneCode, detail: res.detail, worldDelta: { crafted: res.detail?.item ?? doneCode } };
	}
	const msg = String(res?.detail ?? "");
	const code = msg.includes("no recipe")
		? "no_recipe"
		: msg.includes("timed out")
			? "timeout"
			: "failed";
	return { ok: false, code, detail: res?.detail, worldDelta: null };
}

// --- direct wrappers around existing actions ---------------------------------

export const craftPlanksSkill = Object.freeze({
	id: "craft.planks",
	title: "Craft planks from logs",
	timeoutMs: 20_000,
	preconditions(ctx) {
		if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
		if (totalLogs(ctx.bot) < 1) return { ok: false, code: "missing_material", detail: "no log in inventory" };
		return { ok: true };
	},
	async execute(ctx, args = {}) {
		return asResult(await craftPlanks(ctx.bot, args.count ?? 4));
	},
});

export const craftSticksSkill = Object.freeze({
	id: "craft.sticks",
	title: "Craft sticks from planks",
	timeoutMs: 20_000,
	preconditions(ctx) {
		if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
		if (totalPlanks(ctx.bot) < 2) return { ok: false, code: "missing_material", detail: "need 2 planks" };
		return { ok: true };
	},
	async execute(ctx, args = {}) {
		return asResult(await craftSticks(ctx.bot, args.count ?? 4));
	},
});

export const craftWoodenAxeSkill = Object.freeze({
	id: "craft.wooden-axe",
	title: "Craft wooden axe",
	timeoutMs: 30_000,
	preconditions(ctx) {
		if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
		if (totalPlanks(ctx.bot) < 3) return { ok: false, code: "missing_material", detail: "need 3 planks" };
		if (totalSticks(ctx.bot) < 2) return { ok: false, code: "missing_material", detail: "need 2 sticks" };
		return { ok: true };
	},
	async execute(ctx) {
		return asResult(await craftWoodenAxe(ctx.bot));
	},
});

export const craftWoodenPickaxeSkill = Object.freeze({
	id: "craft.wooden-pickaxe",
	title: "Craft wooden pickaxe",
	timeoutMs: 30_000,
	preconditions(ctx) {
		if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
		if (totalPlanks(ctx.bot) < 3) return { ok: false, code: "missing_material", detail: "need 3 planks" };
		if (totalSticks(ctx.bot) < 2) return { ok: false, code: "missing_material", detail: "need 2 sticks" };
		return { ok: true };
	},
	async execute(ctx) {
		return asResult(await craftWoodenPickaxe(ctx.bot));
	},
});

export const craftWoodenSwordSkill = Object.freeze({
	id: "craft.wooden-sword",
	title: "Craft wooden sword",
	timeoutMs: 30_000,
	preconditions(ctx) {
		if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
		if (totalPlanks(ctx.bot) < 2) return { ok: false, code: "missing_material", detail: "need 2 planks" };
		if (totalSticks(ctx.bot) < 1) return { ok: false, code: "missing_material", detail: "need 1 stick" };
		return { ok: true };
	},
	async execute(ctx) {
		return asResult(await craftWoodenSword(ctx.bot));
	},
});

// --- generic crafting (stone tools, furnace, chest, torch) -------------------

// Stone-tier and storage crafts share the same lookup-recipe-then-call-bot.craft
// shape as the wooden tools, but with different precondition counts and item
// names. We define a tiny factory.
//
// `requires` is a map from item name to required count. `needsTable: true`
// means we place / reuse a crafting table first (via actions.placeCraftingTable).

function makeRecipeSkill({ id, title, item, requires, needsTable, doneCode = "done" }) {
	return Object.freeze({
		id,
		title,
		timeoutMs: 30_000,
		preconditions(ctx) {
			if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
			for (const [name, n] of Object.entries(requires)) {
				const have = name === "planks"
					? totalPlanks(ctx.bot)
					: count(ctx.bot, name);
				if (have < n) {
					return { ok: false, code: "missing_material", detail: `need ${n} ${name} (have ${have})` };
				}
			}
			return { ok: true };
		},
		async execute(ctx) {
			const bot = ctx.bot;
			let tableBlock = null;
			if (needsTable) {
				const tableRes = await placeCraftingTable(bot);
				if (!tableRes.ok) {
					const msg = String(tableRes.detail ?? "");
					const code = msg.includes("timed out") ? "timeout" : "missing_table";
					return { ok: false, code, detail: tableRes.detail, worldDelta: null };
				}
				tableBlock = tableRes.block;
			}
			const reg = bot?.registry;
			const itemId = reg?.itemsByName?.[item]?.id;
			if (itemId == null) {
				return { ok: false, code: "unsupported_version", detail: `unknown item ${item}`, worldDelta: null };
			}
			const recipes = bot.recipesFor(itemId, null, 1, tableBlock);
			const recipe = recipes[0];
			if (!recipe) {
				return { ok: false, code: "no_recipe", detail: `no recipe for ${item}`, worldDelta: null };
			}
			try {
				await withTimeout(bot.craft(recipe, 1, tableBlock), 15_000, `craft(${item})`);
				return { ok: true, code: doneCode, detail: { item }, worldDelta: { crafted: item } };
			} catch (e) {
				const msg = String(e?.message ?? "");
				const code = msg.includes("timed out") ? "timeout" : "failed";
				return { ok: false, code, detail: e.message, worldDelta: null };
			}
		},
		validate(ctx, result) {
			return result.ok && !!result.worldDelta?.crafted;
		},
	});
}

export const craftStoneAxeSkill = makeRecipeSkill({
	id: "craft.stone-axe",
	title: "Craft stone axe",
	item: "stone_axe",
	requires: { cobblestone: 3, stick: 2 },
	needsTable: true,
});

export const craftStonePickaxeSkill = makeRecipeSkill({
	id: "craft.stone-pickaxe",
	title: "Craft stone pickaxe",
	item: "stone_pickaxe",
	requires: { cobblestone: 3, stick: 2 },
	needsTable: true,
});

export const craftStoneSwordSkill = makeRecipeSkill({
	id: "craft.stone-sword",
	title: "Craft stone sword",
	item: "stone_sword",
	requires: { cobblestone: 2, stick: 1 },
	needsTable: true,
});

export const craftFurnaceSkill = makeRecipeSkill({
	id: "craft.furnace",
	title: "Craft furnace",
	item: "furnace",
	requires: { cobblestone: 8 },
	needsTable: true,
});

export const craftChestSkill = makeRecipeSkill({
	id: "craft.chest",
	title: "Craft chest",
	item: "chest",
	requires: { planks: 8 },
	needsTable: true,
});

// Torch: 1 stick + 1 coal (or charcoal) → 4 torches. We accept either
// fuel via precondition shortcut: if no coal AND no charcoal, fail with
// missing_material so the curriculum surfaces the blocker rather than
// silently fail at recipe lookup.
export const craftTorchSkill = Object.freeze({
	id: "craft.torch",
	title: "Craft torches",
	timeoutMs: 20_000,
	preconditions(ctx) {
		if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
		if (totalSticks(ctx.bot) < 1) return { ok: false, code: "missing_material", detail: "need 1 stick" };
		if (count(ctx.bot, "coal") < 1 && count(ctx.bot, "charcoal") < 1) {
			return { ok: false, code: "missing_material", detail: "need 1 coal or charcoal" };
		}
		return { ok: true };
	},
	async execute(ctx) {
		const bot = ctx.bot;
		const reg = bot?.registry;
		const itemId = reg?.itemsByName?.["torch"]?.id;
		if (itemId == null) {
			return { ok: false, code: "unsupported_version", detail: "no torch in registry", worldDelta: null };
		}
		const recipes = bot.recipesFor(itemId, null, 1, null);
		const recipe = recipes[0];
		if (!recipe) {
			return { ok: false, code: "no_recipe", detail: "no recipe for torch (need coal+stick)", worldDelta: null };
		}
		try {
			await withTimeout(bot.craft(recipe, 1, null), 15_000, "craft(torch)");
			return { ok: true, code: "done", detail: { item: "torch" }, worldDelta: { crafted: "torch" } };
		} catch (e) {
			return { ok: false, code: "failed", detail: e.message, worldDelta: null };
		}
	},
});