'use server';

import { z } from 'zod';
import { logAdminAction } from '@/lib/audit-logger';

// --- Validation Schemas ---

const suspendSchema = z.object({
    userId: z.string(),
    reason: z.string().min(10, "Reason must be at least 10 characters"),
    duration: z.enum(['24h', '7d', '30d', 'indefinite']),
});

const banSchema = z.object({
    userId: z.string(),
    reason: z.string().min(10),
});

const ticketSchema = z.object({
    userId: z.string(),
    summary: z.string().min(5),
});

// --- Authorization Helper ---

async function verifyAdmin() {
    // TODO: Integrate with Auth.js session check
    // const session = await auth();
    // if (session?.user?.role !== 'admin') throw new Error("Unauthorized");

    // Mock successful admin check
    return { id: 'admin-1', role: 'admin' };
}

// --- Server Actions ---

export async function resetPassword(userId: string) {
    try {
        const admin = await verifyAdmin();

        // Simulate DB call
        await new Promise(resolve => setTimeout(resolve, 800));

        await logAdminAction({
            actorId: admin.id,
            action: 'RESET_PASSWORD',
            targetId: userId,
        });

        return { success: true, message: "Recovery email sent to user." };
    } catch (error) {
        return { success: false, message: "Failed to reset password." };
    }
}

export async function impersonateUser(userId: string) {
    try {
        const admin = await verifyAdmin();

        await logAdminAction({
            actorId: admin.id,
            action: 'IMPERSONATE_USER',
            targetId: userId,
        });

        // In a real app, you'd set a cookie here
        // cookies().set('impersonate_id', userId);

        return { success: true, redirectUrl: '/dashboard' };
    } catch (error) {
        return { success: false, message: "Failed to start impersonation session." };
    }
}

export async function terminateSessions(userId: string) {
    try {
        const admin = await verifyAdmin();

        // Simulate DB call to delete sessions
        await new Promise(resolve => setTimeout(resolve, 500));

        await logAdminAction({
            actorId: admin.id,
            action: 'TERMINATE_SESSIONS',
            targetId: userId,
        });

        return { success: true, message: "All active sessions terminated." };
    } catch (error) {
        return { success: false, message: "Failed to terminate sessions." };
    }
}

export async function toggleSuspension(formData: FormData) {
    try {
        const admin = await verifyAdmin();

        const rawData = {
            userId: formData.get('userId'),
            reason: formData.get('reason'),
            duration: formData.get('duration'),
        };

        const validated = suspendSchema.safeParse(rawData);
        if (!validated.success) {
            return { success: false, message: validated.error.errors[0].message };
        }

        // Simulate DB update
        await new Promise(resolve => setTimeout(resolve, 1000));

        await logAdminAction({
            actorId: admin.id,
            action: 'SUSPEND_USER',
            targetId: validated.data.userId,
            details: { reason: validated.data.reason, duration: validated.data.duration },
        });

        return { success: true, message: `User suspended for ${validated.data.duration}.` };
    } catch (error) {
        return { success: false, message: "Failed to suspend user." };
    }
}

export async function createSupportTicket(userId: string, summary: string) {
    try {
        const admin = await verifyAdmin();

        const validated = ticketSchema.safeParse({ userId, summary });
        if (!validated.success) return { success: false, message: "Invalid input" };

        // Simulate DB insert
        await new Promise(resolve => setTimeout(resolve, 600));

        await logAdminAction({
            actorId: admin.id,
            action: 'CREATE_TICKET',
            targetId: userId,
            details: { summary },
        });

        return { success: true, message: "Support ticket #T-1234 created." };
    } catch (error) {
        return { success: false, message: "Failed to create ticket." };
    }
}

// --- Bulk Actions ---

export async function bulkSuspendUsers(userIds: string[]) {
    try {
        const admin = await verifyAdmin();

        // Simulate DB update
        await new Promise(resolve => setTimeout(resolve, 1500));

        // Log for each user or a single bulk log
        await logAdminAction({
            actorId: admin.id,
            action: 'BULK_SUSPEND',
            targetId: 'multiple',
            details: { count: userIds.length, userIds },
        });

        return { success: true, message: `Successfully suspended ${userIds.length} users.` };
    } catch (error) {
        return { success: false, message: "Failed to perform bulk suspension." };
    }
}

export async function bulkBanUsers(userIds: string[]) {
    try {
        const admin = await verifyAdmin();

        await new Promise(resolve => setTimeout(resolve, 1500));

        await logAdminAction({
            actorId: admin.id,
            action: 'BULK_BAN',
            targetId: 'multiple',
            details: { count: userIds.length, userIds },
        });

        return { success: true, message: `Successfully banned ${userIds.length} users.` };
    } catch (error) {
        return { success: false, message: "Failed to perform bulk ban." };
    }
}

export async function bulkDeleteUsers(userIds: string[]) {
    try {
        const admin = await verifyAdmin();

        await new Promise(resolve => setTimeout(resolve, 2000));

        await logAdminAction({
            actorId: admin.id,
            action: 'BULK_DELETE',
            targetId: 'multiple',
            details: { count: userIds.length, userIds },
        });

        return { success: true, message: `Successfully deleted ${userIds.length} users.` };
    } catch (error) {
        return { success: false, message: "Failed to perform bulk delete." };
    }
}

export async function bulkVerifyUsers(userIds: string[]) {
    try {
        const admin = await verifyAdmin();

        await new Promise(resolve => setTimeout(resolve, 1000));

        await logAdminAction({
            actorId: admin.id,
            action: 'BULK_VERIFY',
            targetId: 'multiple',
            details: { count: userIds.length, userIds },
        });

        return { success: true, message: `Successfully verified ${userIds.length} users.` };
    } catch (error) {
        return { success: false, message: "Failed to verify users." };
    }
}

export async function bulkTagUsers(userIds: string[], tagId: string) {
    try {
        const admin = await verifyAdmin();

        await new Promise(resolve => setTimeout(resolve, 1000));

        await logAdminAction({
            actorId: admin.id,
            action: 'BULK_TAG_ADD',
            targetId: 'multiple',
            details: { count: userIds.length, userIds, tagId },
        });

        return { success: true, message: `Added tag to ${userIds.length} users.` };
    } catch (error) {
        return { success: false, message: "Failed to tag users." };
    }
}