"use client";
import { useState } from "react";
import { toast } from "sonner";
import {
	bulkAdjustCurrency,
	bulkBan,
	bulkGiveBadge,
	bulkUnban,
} from "@/actions/bulk-users";

type PendingDialog =
	| { kind: "ban"; ids: number[] }
	| { kind: "give-currency"; ids: number[] }
	| { kind: "give-badge"; ids: number[] }
	| null;

export function useUserBulkActions() {
	const [pending, setPending] = useState<PendingDialog>(null);
	const [busy, setBusy] = useState(false);
	const [banReason, setBanReason] = useState("Bulk ban");
	const [banDuration, setBanDuration] = useState("-1");
	const [currencyType, setCurrencyType] = useState<
		"credits" | "pixels" | "points"
	>("credits");
	const [currencyAmount, setCurrencyAmount] = useState("100");
	const [badgeCode, setBadgeCode] = useState("");

	function reportResult(
		label: string,
		ok: number,
		total: number,
		failures = 0,
	) {
		if (ok > 0)
			toast.success(
				`${label}: ${ok}/${total}${failures ? ` · ${failures} failed` : ""}`,
			);
		if (failures > 0 && ok === 0)
			toast.error(`${label} failed for ${failures} users`);
	}

	async function handleBulkAction(action: string, ids: (number | string)[]) {
		if (busy) return;
		const numericIds = ids.map((i) => Number(i));

		if (action === "unban") {
			setBusy(true);
			try {
				const result = await bulkUnban({ userIds: numericIds });
				if (result.ok) {
					const data = result.data as { unbanned: number; total: number };
					reportResult("Unbanned", data.unbanned, data.total);
				} else toast.error(result.error);
			} catch {
				toast.error(
					"Network error. The outcome is uncertain; check the user before retrying.",
				);
			} finally {
				setBusy(false);
			}
			return;
		}

		if (action === "ban") {
			setPending({ kind: "ban", ids: numericIds });
			return;
		}

		if (action === "give-currency") {
			setPending({ kind: "give-currency", ids: numericIds });
			return;
		}

		if (action === "give-badge") {
			setPending({ kind: "give-badge", ids: numericIds });
			return;
		}
	}

	async function confirmBan() {
		if (pending?.kind !== "ban") return;
		setBusy(true);
		try {
			const result = await bulkBan({
				userIds: pending.ids,
				reason: banReason,
				duration: Number(banDuration),
			});
			if (result.ok) {
				const data = result.data as { banned: number };
				reportResult("Banned", data.banned, pending.ids.length);
				setPending(null);
			} else toast.error(result.error);
		} catch {
			toast.error(
				"Network error. The outcome is uncertain; check the user before retrying.",
			);
		} finally {
			setBusy(false);
		}
	}

	async function confirmGiveCurrency() {
		if (pending?.kind !== "give-currency") return;
		setBusy(true);
		try {
			const result = await bulkAdjustCurrency({
				userIds: pending.ids,
				amount: Number(currencyAmount),
				type: currencyType,
			});
			if (result.ok) {
				const data = result.data as {
					adjusted: number;
					total: number;
					failedIds: { userId: number; reason: string }[];
				};
				reportResult(
					`Adjusted ${currencyAmount} ${currencyType}`,
					data.adjusted,
					data.total,
					data.failedIds.length,
				);
				setPending(null);
			} else toast.error(result.error);
		} catch {
			toast.error(
				"Network error. The outcome is uncertain; check the user before retrying.",
			);
		} finally {
			setBusy(false);
		}
	}

	async function confirmGiveBadge() {
		if (pending?.kind !== "give-badge") return;
		setBusy(true);
		try {
			const result = await bulkGiveBadge({
				userIds: pending.ids,
				badgeCode: badgeCode.trim().toUpperCase(),
			});
			if (result.ok) {
				const data = result.data as {
					given: number;
					total: number;
					failedIds: { userId: number; reason: string }[];
				};
				reportResult(
					`Given badge ${badgeCode}`,
					data.given,
					data.total,
					data.failedIds.length,
				);
				setPending(null);
			} else toast.error(result.error);
		} catch {
			toast.error(
				"Network error. The outcome is uncertain; check the user before retrying.",
			);
		} finally {
			setBusy(false);
		}
	}

	return {
		pending,
		setPending,
		busy,
		banReason,
		setBanReason,
		banDuration,
		setBanDuration,
		currencyType,
		setCurrencyType,
		currencyAmount,
		setCurrencyAmount,
		badgeCode,
		setBadgeCode,
		handleBulkAction,
		confirmBan,
		confirmGiveCurrency,
		confirmGiveBadge,
	};
}