import { useState } from 'react';
import { AlertTriangle, AlertCircle } from 'lucide-react';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import { Button } from '@/components/ui/button';
import { Textarea } from '@/components/ui/textarea';
import { Label } from '@/components/ui/label';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { Alert, AlertDescription, AlertTitle } from '@/components/ui/alert';

interface EscalationDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  onEscalate: (reason: string) => Promise<void>;
  submissionType: string;
  error?: { message: string; errorId?: string } | null;
}

const escalationReasons = [
  'Complex dependency issue',
  'Potential policy violation',
  'Unclear submission content',
  'Requires admin judgment',
  'Technical issue',
  'Other',
];

export function EscalationDialog({
  open,
  onOpenChange,
  onEscalate,
  submissionType,
  error,
}: EscalationDialogProps) {
  const [selectedReason, setSelectedReason] = useState('');
  const [additionalNotes, setAdditionalNotes] = useState('');
  const [isSubmitting, setIsSubmitting] = useState(false);

  const handleEscalate = async () => {
    const reason = selectedReason === 'Other' 
      ? additionalNotes 
      : `${selectedReason}${additionalNotes ? ': ' + additionalNotes : ''}`;
    
    if (!reason.trim()) return;

    setIsSubmitting(true);
    try {
      await onEscalate(reason);
      setSelectedReason('');
      setAdditionalNotes('');
      onOpenChange(false);
    } finally {
      setIsSubmitting(false);
    }
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent>
        <DialogHeader>
          <DialogTitle className="flex items-center gap-2">
            <AlertTriangle className="h-5 w-5 text-destructive" />
            Escalate Submission
          </DialogTitle>
          <DialogDescription>
            Escalating this {submissionType} will mark it as high priority and notify senior moderators.
          </DialogDescription>
        </DialogHeader>

        {error && (
          <Alert variant="destructive" className="mt-4">
            <AlertCircle className="h-4 w-4" />
            <AlertTitle>Escalation Failed</AlertTitle>
            <AlertDescription>
              <div className="space-y-2">
                <p className="text-sm">{error.message}</p>
                {error.errorId && (
                  <p className="text-xs font-mono bg-destructive/10 px-2 py-1 rounded">
                    Reference: {error.errorId.slice(0, 8)}
                  </p>
                )}
              </div>
            </AlertDescription>
          </Alert>
        )}

        <div className="space-y-4 py-4">
          <div className="space-y-2">
            <Label>Escalation Reason</Label>
            <Select value={selectedReason} onValueChange={setSelectedReason}>
              <SelectTrigger>
                <SelectValue placeholder="Select a reason" />
              </SelectTrigger>
              <SelectContent>
                {escalationReasons.map((reason) => (
                  <SelectItem key={reason} value={reason}>
                    {reason}
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>
          </div>

          <div className="space-y-2">
            <Label>Additional Notes</Label>
            <Textarea
              value={additionalNotes}
              onChange={(e) => setAdditionalNotes(e.target.value)}
              placeholder="Provide any additional context..."
              rows={4}
              className="resize-none"
            />
          </div>
        </div>

        <DialogFooter>
          <Button
            variant="outline"
            onClick={() => onOpenChange(false)}
            disabled={isSubmitting}
          >
            Cancel
          </Button>
          <Button
            variant="destructive"
            onClick={handleEscalate}
            disabled={!selectedReason || isSubmitting}
          >
            {isSubmitting ? 'Escalating...' : 'Escalate'}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}