'use client';

import React from 'react';
import { FileCheck, ShieldAlert, CheckCircle2, XCircle, Clock, ArrowRight } from 'lucide-react';
import Link from 'next/link';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { useDashboardMetrics } from '@/services/superAdmin/queries';

interface Props {
  userContext: any;
}

export default function KycOfficerView({ userContext }: Props) {
  const { data: metrics, isLoading, isError } = useDashboardMetrics();

  if (isLoading) {
    return (
      <div className="p-8 space-y-4 grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4 animate-pulse max-w-7xl mx-auto">
        {[...Array(4)].map((_, i) => (
          <div key={i} className="h-24 bg-muted/20 rounded-xl border border-border/10" />
        ))}
      </div>
    );
  }

  if (isError || !metrics) {
    return (
      <div className="p-8 text-center text-xs font-semibold text-destructive border border-dashed border-destructive/20 rounded-xl bg-destructive/5 max-w-7xl mx-auto">
        Could not load KYC Officer metrics pipeline. Please verify session tokens.
      </div>
    );
  }

  const queue = metrics?.queue || [];

  return (
    <div className="space-y-8 max-w-7xl mx-auto animate-in fade-in slide-in-from-bottom-2 duration-500 select-none">
      {/* HEADER */}
      <div className="flex flex-col md:flex-row justify-between items-start md:items-center gap-4 border-b border-border/40 pb-6">
        <div className="space-y-0.5">
          <h1 className="text-sm font-black tracking-widest text-foreground uppercase">
            KYC VERIFICATION DESK
          </h1>
          <p className="text-[11px] font-medium text-muted-foreground/70">
            Assigned User Identity Audit & Document Compliance Verification Node.
          </p>
        </div>
        <Link href="/admin/kyc-approvals">
          <Button className="h-8 rounded-md px-3 text-[11px] font-bold tracking-wider uppercase shadow-sm gap-1.5 bg-primary text-primary-foreground hover:bg-primary/90 cursor-pointer">
            <span>Manage All KYC Queues</span>
            <ArrowRight className="h-3 w-3" />
          </Button>
        </Link>
      </div>

      {/* METRICS WIDGETS */}
      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-4">
        {[
          { title: 'Pending Queue', value: metrics.widgets?.assignedPending || 0, sub: 'Waiting Initial Audit', icon: Clock, danger: true },
          { title: 'Under Review', value: metrics.widgets?.assignedUnderReview || 0, sub: 'In Progress Review', icon: ShieldAlert, highlight: true },
          { title: 'Approved By Me', value: metrics.widgets?.totalApprovedByMe || 0, sub: 'Verified & Active Nodes', icon: CheckCircle2, success: true },
          { title: 'Rejected By Me', value: metrics.widgets?.totalRejectedByMe || 0, sub: 'Validation Failure Logs', icon: XCircle },
        ].map((w, idx) => (
          <Card key={idx} className={`shadow-none rounded-xl border border-border/40 bg-surface backdrop-blur-md transition-all hover:border-border/80 ${w.highlight ? 'border-l-primary border-l-2' : ''}`}>
            <CardHeader className="flex flex-row items-center justify-between pb-1.5 space-y-0 pt-4 px-4">
              <CardTitle className="text-[10px] font-bold uppercase tracking-wider text-muted-foreground/80">{w.title}</CardTitle>
              <w.icon className={`h-3.5 w-3.5 ${w.success ? 'text-emerald-500' : w.danger ? 'text-destructive' : 'text-muted-foreground/60'}`} />
            </CardHeader>
            <CardContent className="pb-4 px-4">
              <div className={`text-xl font-bold tracking-tight ${w.success ? 'text-emerald-600' : w.danger ? 'text-destructive' : 'text-foreground'}`}>
                {w.value}
              </div>
              <p className="text-[10px] font-medium text-muted-foreground/50 mt-0.5">{w.sub}</p>
            </CardContent>
          </Card>
        ))}
      </div>

      {/* RECENT PENDING QUEUE TABLE */}
      <Card className="shadow-none rounded-xl border border-border/40 bg-surface">
        <CardHeader className="pb-3 border-b border-border/10 flex flex-row items-center justify-between">
          <CardTitle className="text-xs font-bold uppercase tracking-wider text-foreground flex items-center gap-2">
            <FileCheck className="h-4 w-4 text-primary" /> Immediate Review Action Tasks
          </CardTitle>
          <span className="text-[10px] text-muted-foreground font-mono">{queue.length} Tasks Listed</span>
        </CardHeader>
        <CardContent className="p-0">
          {queue.length === 0 ? (
            <div className="p-8 text-center text-xs text-muted-foreground">
              No pending KYC verification requests currently assigned to your queue.
            </div>
          ) : (
            <div className="divide-y divide-border/20">
              {queue.map((item: any) => (
                <div key={item.id} className="p-4 flex items-center justify-between hover:bg-muted/10 transition-colors">
                  <div className="space-y-0.5">
                    <p className="text-xs font-bold text-foreground">
                      {item.user?.firstName} {item.user?.lastName}
                    </p>
                    <p className="text-[10px] text-muted-foreground font-mono">{item.user?.email}</p>
                  </div>
                  <div className="flex items-center gap-3">
                    <span className="text-[9px] uppercase px-2 py-0.5 rounded font-bold border border-border/40 bg-muted/20 text-muted-foreground">
                      {item.user?.role}
                    </span>
                    <span className={`text-[9px] uppercase px-2 py-0.5 rounded font-bold ${item.status === 'UNDER_REVIEW' ? 'bg-amber-500/10 text-amber-500' : 'bg-destructive/10 text-destructive'}`}>
                      {item.status}
                    </span>
                    <Link href={`/admin/kyc-approvals/${item.id}`}>
                      <Button size="sm" variant="outline" className="h-7 text-[10px] font-bold cursor-pointer">
                        Audit File
                      </Button>
                    </Link>
                  </div>
                </div>
              ))}
            </div>
          )}
        </CardContent>
      </Card>
    </div>
  );
}