import { useState } from 'react';
import { useNostrPublish } from '@/hooks/useNostrPublish';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useToast } from '@/hooks/useToast';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  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 { RadioGroup, RadioGroupItem } from '@/components/ui/radio-group';
import { Loader2, Flag, AlertTriangle, CheckCircle2 } from 'lucide-react';
import { cn } from '@/lib/utils';

// NIP-56 Report types with skate-specific labels
const REPORT_REASONS = [
  {
    id: 'spam',
    label: 'Fake/Non-existent spot',
    description: 'This spot does not exist or location is wrong',
    icon: '📍',
  },
  {
    id: 'other',
    label: 'Stolen/Fake photos',
    description: 'Photos are stock images or stolen from elsewhere',
    icon: '📸',
  },
  {
    id: 'spam',
    label: 'Spam or advertising',
    description: 'Promotional content or duplicate listings',
    icon: '🗑️',
    subtype: 'spam-ad',
  },
  {
    id: 'illegal',
    label: 'Dangerous location',
    description: 'Private property, unsafe, or illegal to access',
    icon: '⚠️',
  },
  {
    id: 'nudity',
    label: 'Inappropriate content',
    description: 'Contains offensive or adult content',
    icon: '🔞',
  },
  {
    id: 'impersonation',
    label: 'Impersonation',
    description: 'Someone pretending to be someone else',
    icon: '👤',
  },
  {
    id: 'other',
    label: 'Other',
    description: 'Something else not listed above',
    icon: '📝',
    subtype: 'other-general',
  },
] as const;

interface ReportDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  // What we're reporting
  targetType: 'spot' | 'event' | 'tour' | 'shop' | 'user' | 'listing' | 'coach' | 'filmer';
  targetPubkey: string;
  targetEventId?: string;
  targetTitle?: string;
  // Callback after report
  onReported?: () => void;
}

export function ReportDialog({
  open,
  onOpenChange,
  targetType,
  targetPubkey,
  targetEventId,
  targetTitle,
  onReported,
}: ReportDialogProps) {
  const { user } = useCurrentUser();
  const { mutateAsync: publishEvent, isPending } = useNostrPublish();
  const { toast } = useToast();

  const [selectedReason, setSelectedReason] = useState<string>('');
  const [additionalDetails, setAdditionalDetails] = useState('');
  const [step, setStep] = useState<'form' | 'success'>('form');

  const handleSubmit = async () => {
    if (!user || !selectedReason) return;

    const reason = REPORT_REASONS.find(
      (r) => r.id === selectedReason || r.subtype === selectedReason
    );
    if (!reason) return;

    try {
      // Build NIP-56 report tags
      const tags: string[][] = [];

      // Always include the pubkey being reported
      if (targetEventId) {
        // Reporting an event (spot, tour, etc.)
        tags.push(['e', targetEventId, reason.id]);
        tags.push(['p', targetPubkey]);
      } else {
        // Reporting just a user/profile
        tags.push(['p', targetPubkey, reason.id]);
      }

      // Build content with context
      let content = '';
      if (additionalDetails.trim()) {
        content = additionalDetails.trim();
      }
      if (targetTitle) {
        content = content
          ? `${content}\n\nReported: ${targetTitle} (${targetType})`
          : `Reported: ${targetTitle} (${targetType})`;
      }

      await publishEvent({
        kind: 1984, // NIP-56 Report
        content,
        tags,
      });

      setStep('success');
      onReported?.();

      toast({
        title: 'Report submitted',
        description: 'Thank you for helping keep SkateSpots safe.',
      });
    } catch (error) {
      toast({
        title: 'Failed to submit report',
        description: error instanceof Error ? error.message : 'Please try again',
        variant: 'destructive',
      });
    }
  };

  const handleClose = () => {
    onOpenChange(false);
    // Reset form after animation
    setTimeout(() => {
      setSelectedReason('');
      setAdditionalDetails('');
      setStep('form');
    }, 200);
  };

  const getReasonKey = (reason: typeof REPORT_REASONS[number]) => {
    return reason.subtype || reason.id;
  };

  if (!user) {
    return (
      <Dialog open={open} onOpenChange={onOpenChange}>
        <DialogContent className="sm:max-w-md">
          <DialogHeader>
            <DialogTitle className="flex items-center gap-2">
              <Flag className="h-5 w-5 text-red-500" />
              Report Content
            </DialogTitle>
          </DialogHeader>
          <div className="text-center py-6">
            <AlertTriangle className="h-12 w-12 mx-auto mb-4 text-yellow-500" />
            <p className="text-muted-foreground">
              You need to be logged in to report content.
            </p>
          </div>
        </DialogContent>
      </Dialog>
    );
  }

  return (
    <Dialog open={open} onOpenChange={handleClose}>
      <DialogContent className="sm:max-w-md">
        <DialogHeader>
          <DialogTitle className="flex items-center gap-2">
            <Flag className="h-5 w-5 text-red-500" />
            Report Content
          </DialogTitle>
          {step === 'form' && (
            <DialogDescription>
              Help keep the community safe by reporting inappropriate content.
            </DialogDescription>
          )}
        </DialogHeader>

        {step === 'form' ? (
          <div className="space-y-4">
            {/* Target info */}
            {targetTitle && (
              <div className="p-3 rounded-lg bg-muted/50 border">
                <p className="text-xs text-muted-foreground uppercase mb-1">
                  Reporting {targetType}
                </p>
                <p className="font-medium text-sm truncate">{targetTitle}</p>
              </div>
            )}

            {/* Reason selection */}
            <div className="space-y-2">
              <Label>Why are you reporting this?</Label>
              <RadioGroup
                value={selectedReason}
                onValueChange={setSelectedReason}
                className="space-y-2"
              >
                {REPORT_REASONS.map((reason) => {
                  const key = getReasonKey(reason);
                  return (
                    <div
                      key={key}
                      className={cn(
                        'flex items-start space-x-3 p-3 rounded-lg border transition-colors cursor-pointer',
                        selectedReason === key
                          ? 'border-red-500/50 bg-red-500/10'
                          : 'border-border hover:bg-muted/50'
                      )}
                      onClick={() => setSelectedReason(key)}
                    >
                      <RadioGroupItem value={key} id={key} className="mt-0.5" />
                      <div className="flex-1 min-w-0">
                        <Label
                          htmlFor={key}
                          className="flex items-center gap-2 cursor-pointer font-medium"
                        >
                          <span>{reason.icon}</span>
                          {reason.label}
                        </Label>
                        <p className="text-xs text-muted-foreground mt-0.5">
                          {reason.description}
                        </p>
                      </div>
                    </div>
                  );
                })}
              </RadioGroup>
            </div>

            {/* Additional details */}
            <div className="space-y-2">
              <Label htmlFor="details">Additional details (optional)</Label>
              <Textarea
                id="details"
                placeholder="Provide any additional context that might help..."
                value={additionalDetails}
                onChange={(e) => setAdditionalDetails(e.target.value)}
                rows={3}
                className="resize-none"
              />
            </div>

            {/* Submit */}
            <div className="flex gap-2 pt-2">
              <Button
                variant="outline"
                onClick={handleClose}
                className="flex-1"
                disabled={isPending}
              >
                Cancel
              </Button>
              <Button
                onClick={handleSubmit}
                disabled={!selectedReason || isPending}
                className="flex-1 bg-red-500 hover:bg-red-600"
              >
                {isPending ? (
                  <>
                    <Loader2 className="h-4 w-4 mr-2 animate-spin" />
                    Submitting...
                  </>
                ) : (
                  <>
                    <Flag className="h-4 w-4 mr-2" />
                    Submit Report
                  </>
                )}
              </Button>
            </div>
          </div>
        ) : (
          /* Success state */
          <div className="text-center py-6">
            <div className="w-16 h-16 rounded-full bg-green-500/20 flex items-center justify-center mx-auto mb-4">
              <CheckCircle2 className="h-8 w-8 text-green-500" />
            </div>
            <h3 className="font-bold text-lg mb-2">Report Submitted</h3>
            <p className="text-muted-foreground text-sm mb-6">
              Thanks for helping keep SkateSpots safe and accurate. Your report
              will be reviewed by trusted community members.
            </p>
            <Button onClick={handleClose} className="w-full">
              Done
            </Button>
          </div>
        )}
      </DialogContent>
    </Dialog>
  );
}