"use server";

import { eq, sql } from "drizzle-orm";
import { requirePermission } from "@/lib/admin/guard";
import { db, Sanctions, User, UsersSettings } from "@/lib/db";
import { PERMS } from "@/lib/permissions";
import { prisma } from "@/lib/prisma";
import type { ActionResult } from "@/lib/safe-action-shared";
import { rcon } from "@/lib/services/rcon";
import { logStaffActivity } from "@/lib/services/staff-activity";

export async function bulkUnban({
	userIds,
}: {
	userIds: number[];
}): Promise<ActionResult<{ unbanned: number; total: number }>> {
	const staff = await requirePermission(PERMS.USERS_EDIT);
	const result = await prisma.ban.deleteMany({
		where: { userId: { in: userIds } },
	});
	await logStaffActivity({
		staffId: staff.id,
		action: "bulk_unban",
		description: `Unbanned ${result.count} user(s)`,
		targetType: "user",
	});
	return {
		ok: true as const,
		data: { unbanned: result.count, total: userIds.length },
	};
}

export async function bulkBan({
	userIds,
	reason,
	duration,
}: {
	userIds: number[];
	reason: string;
	duration: number;
}): Promise<ActionResult<{ banned: number }>> {
	const staff = await requirePermission(PERMS.USERS_EDIT);
	const now = Math.floor(Date.now() / 1000);
	let banned = 0;

	for (const userId of userIds) {
		try {
			await prisma.ban.create({
				data: {
					userId,
					ip: "",
					machineId: "",
					userStaffId: staff.id,
					timestamp: now,
					banExpire: duration > 0 ? now + duration : 0,
					banReason: reason,
					type: "account",
				},
			});
			banned++;
		} catch {
			// skip duplicates
		}
	}

	await logStaffActivity({
		staffId: staff.id,
		action: "bulk_ban",
		description: `Banned ${banned} user(s)`,
		targetType: "user",
	});
	return { ok: true as const, data: { banned } };
}

export async function bulkGiveCurrency({
	userIds,
	amount,
	type,
}: {
	userIds: number[];
	amount: number;
	type: "credits" | "pixels" | "points";
}): Promise<
	ActionResult<{
		given: number;
		total: number;
		failedIds: Array<{ userId: number; reason: string }>;
	}>
> {
	const staff = await requirePermission(PERMS.USERS_EDIT);
	let given = 0;
	const failedIds: Array<{ userId: number; reason: string }> = [];

	for (const userId of userIds) {
		try {
			if (type === "credits") {
				await prisma.user.update({
					where: { id: userId },
					data: { credits: { increment: amount } },
				});
				await rcon.giveCredits(userId, amount);
			} else if (type === "pixels") {
				await prisma.usersCurrency.upsert({
					where: { userId_type: { userId, type: 0 } },
					update: { amount: { increment: amount } },
					create: { userId, type: 0, amount },
				});
				await rcon.giveDuckets(userId, amount);
			} else if (type === "points") {
				await prisma.usersCurrency.upsert({
					where: { userId_type: { userId, type: 101 } },
					update: { amount: { increment: amount } },
					create: { userId, type: 101, amount },
				});
				await rcon.givePointsGotw(userId, amount);
			}
			given++;
		} catch {
			failedIds.push({ userId, reason: "Database error" });
		}
	}

	await logStaffActivity({
		staffId: staff.id,
		action: "bulk_give_currency",
		description: `Gave ${amount} ${type} to ${given} user(s)`,
		targetType: "user",
	});
	return {
		ok: true as const,
		data: { given, total: userIds.length, failedIds },
	};
}

export async function bulkGiveBadge({
	userIds,
	badgeCode,
}: {
	userIds: number[];
	badgeCode: string;
}): Promise<
	ActionResult<{
		given: number;
		total: number;
		failedIds: Array<{ userId: number; reason: string }>;
	}>
> {
	const staff = await requirePermission(PERMS.USERS_EDIT);
	let given = 0;
	const failedIds: Array<{ userId: number; reason: string }> = [];

	for (const userId of userIds) {
		try {
			const existing = await prisma.usersBadges.findFirst({
				where: { userId, badgeCode },
				select: { id: true },
			});
			if (!existing) {
				const max = await prisma.usersBadges.aggregate({
					where: { userId },
					_max: { slotId: true },
				});
				const slotId = (max._max.slotId ?? 0) + 1;
				await prisma.usersBadges.create({
					data: { userId, slotId, badgeCode },
				});
				await rcon.giveBadge(userId, badgeCode);
			}
			given++;
		} catch {
			failedIds.push({ userId, reason: "Database error" });
		}
	}

	await logStaffActivity({
		staffId: staff.id,
		action: "bulk_give_badge",
		description: `Gave badge "${badgeCode}" to ${given} user(s)`,
		targetType: "user",
	});
	return {
		ok: true as const,
		data: { given, total: userIds.length, failedIds },
	};
}

export async function bulkAdjustCurrency({
	userIds,
	amount,
	type,
}: {
	userIds: number[];
	/** Positive = give, negative = take. Balances clamped at 0. */
	amount: number;
	type: "credits" | "pixels" | "points";
}): Promise<
	ActionResult<{
		adjusted: number;
		total: number;
		failedIds: Array<{ userId: number; reason: string }>;
	}>
> {
	const staff = await requirePermission(PERMS.USERS_EDIT);
	if (!Number.isFinite(amount) || amount === 0) {
		return { ok: false as const, error: "Amount must be a non-zero number" };
	}

	if (amount > 0) {
		const given = await bulkGiveCurrency({ userIds, amount, type });
		if (!given.ok) return given;
		if (!given.data) {
			return { ok: false as const, error: "Currency adjustment failed" };
		}
		return {
			ok: true as const,
			data: {
				adjusted: given.data.given,
				total: given.data.total,
				failedIds: given.data.failedIds,
			},
		};
	}

	const take = Math.abs(Math.trunc(amount));
	let adjusted = 0;
	const failedIds: Array<{ userId: number; reason: string }> = [];

	for (const userId of userIds) {
		try {
			if (type === "credits") {
				const user = await prisma.user.findUnique({
					where: { id: userId },
					select: { credits: true },
				});
				if (!user) {
					failedIds.push({ userId, reason: "Not found" });
					continue;
				}
				const next = Math.max(0, user.credits - take);
				await prisma.user.update({
					where: { id: userId },
					data: { credits: next },
				});
			} else {
				const currencyType = type === "pixels" ? 0 : 101;
				const row = await prisma.usersCurrency.findUnique({
					where: { userId_type: { userId, type: currencyType } },
				});
				const current = row?.amount ?? 0;
				const next = Math.max(0, current - take);
				await prisma.usersCurrency.upsert({
					where: { userId_type: { userId, type: currencyType } },
					update: { amount: next },
					create: { userId, type: currencyType, amount: next },
				});
			}
			adjusted++;
		} catch {
			failedIds.push({ userId, reason: "Database error" });
		}
	}

	await logStaffActivity({
		staffId: staff.id,
		action: "bulk_adjust_currency",
		description: `Adjusted ${amount} ${type} for ${adjusted} user(s) (DB-only take; no RCON debit)`,
		targetType: "user",
	});
	return {
		ok: true as const,
		data: { adjusted, total: userIds.length, failedIds },
	};
}

/**
 * Persist trade lock on `sanctions.trade_locked_until` + `users_settings.can_trade`
 * via Drizzle, then best-effort RCON sync (settradelock + alert + disconnect if online).
 */
export async function setTradeLock({
	userId,
	untilUnix,
}: {
	userId: number;
	/** Unix seconds; 0 clears the lock. */
	untilUnix: number;
}): Promise<ActionResult<{ userId: number; untilUnix: number }>> {
	const staff = await requirePermission(PERMS.USERS_EDIT);
	const until = Math.max(0, Math.trunc(untilUnix));
	const locked = until > 0;

	const [user] = await db
		.select({
			id: User.id,
			username: User.username,
			online: User.online,
		})
		.from(User)
		.where(eq(User.id, userId))
		.limit(1);
	if (!user) {
		return { ok: false as const, error: "User not found" };
	}

	await db.transaction(async (tx) => {
		const [existing] = await tx
			.select({ id: Sanctions.id })
			.from(Sanctions)
			.where(eq(Sanctions.habboId, userId))
			.limit(1);
		if (existing) {
			await tx
				.update(Sanctions)
				.set({
					tradeLockedUntil: until,
					...(locked ? { reason: "Trade lock (CMS)" } : {}),
				})
				.where(eq(Sanctions.id, existing.id));
		} else {
			await tx.insert(Sanctions).values({
				habboId: userId,
				tradeLockedUntil: until,
				reason: locked ? "Trade lock (CMS)" : "",
			});
		}

		await tx
			.update(UsersSettings)
			.set({
				canTrade: locked ? "0" : "1",
				...(locked
					? { tradelockAmount: sql`${UsersSettings.tradelockAmount} + 1` }
					: {}),
			})
			.where(eq(UsersSettings.userId, userId));
	});

	await rcon.setTradeLock(userId, locked);
	await rcon.alertUser(
		userId,
		locked
			? "Trading has been disabled by staff."
			: "Trading has been re-enabled by staff.",
	);
	if (user.online === "1") {
		await rcon.disconnectUser(userId, user.username);
	}

	await logStaffActivity({
		staffId: staff.id,
		action: locked ? "trade_lock" : "trade_unlock",
		description: locked
			? `Trade-locked ${user.username} (#${userId}) until ${until}`
			: `Cleared trade lock for ${user.username} (#${userId})`,
		targetType: "user",
		targetId: userId,
	});

	return { ok: true as const, data: { userId, untilUnix: until } };
}