'use client';

import { useState, type ReactNode } from 'react';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from '@/components/ui/alert-dialog';
import { AlertTriangle, AlertCircle, Info, CheckCircle } from 'lucide-react';
import { cn } from '@/lib/utils';

export type ConfirmDialogVariant = 'danger' | 'warning' | 'info' | 'success';

interface ConfirmDialogProps {
  /** Whether the dialog is open */
  open: boolean;
  /** Callback when open state changes */
  onOpenChange: (open: boolean) => void;
  /** Dialog title */
  title: string;
  /** Dialog description/content */
  description: ReactNode;
  /** Cancel button text (default: "Cancel") */
  cancelText?: string;
  /** Confirm button text (default: "Confirm") */
  confirmText?: string;
  /** Dialog variant/type */
  variant?: ConfirmDialogVariant;
  /** Callback when user confirms */
  onConfirm: () => void | Promise<void>;
  /** Callback when user cancels */
  onCancel?: () => void;
  /** Whether the confirm action is destructive */
  destructive?: boolean;
}

const VARIANT_ICONS = {
  danger: AlertTriangle,
  warning: AlertCircle,
  info: Info,
  success: CheckCircle,
};

const VARIANT_TITLE_COLORS = {
  danger: 'text-[var(--color-danger)]',
  warning: 'text-[var(--color-warning)]',
  info: 'text-[var(--color-info)]',
  success: 'text-[var(--color-success)]',
};

const VARIANT_ACTION_COLORS = {
  danger: 'bg-[var(--color-danger)] hover:bg-[var(--interactive-danger-hover)] text-white',
  warning: 'bg-[var(--color-warning)] hover:opacity-90 text-black',
  info: 'bg-[var(--color-info)] hover:opacity-90 text-white',
  success: 'bg-[var(--color-success)] hover:opacity-90 text-white',
};

/**
 * Reusable confirmation dialog component.
 * Uses the existing shadcn/ui AlertDialog.
 * 
 * @example
 * <ConfirmDialog
 *   open={showDialog}
 *   onOpenChange={setShowDialog}
 *   title="Delete Item"
 *   description="Are you sure you want to delete this item? This action cannot be undone."
 *   variant="danger"
 *   onConfirm={handleDelete}
 * />
 */
export function ConfirmDialog({
  open,
  onOpenChange,
  title,
  description,
  cancelText = 'Cancel',
  confirmText = 'Confirm',
  variant = 'warning',
  onConfirm,
  onCancel,
  destructive = false,
}: ConfirmDialogProps) {
  const [isLoading, setIsLoading] = useState(false);

  const Icon = VARIANT_ICONS[variant];
  const titleColor = VARIANT_TITLE_COLORS[variant];
  const actionClass = destructive ? VARIANT_ACTION_COLORS.danger : VARIANT_ACTION_COLORS[variant];

  const handleConfirm = async () => {
    setIsLoading(true);
    try {
      await onConfirm();
      onOpenChange(false);
    } finally {
      setIsLoading(false);
    }
  };

  const handleCancel = () => {
    onCancel?.();
    onOpenChange(false);
  };

  return (
    <AlertDialog open={open} onOpenChange={onOpenChange}>
      <AlertDialogContent className="bg-[var(--bg-elevated)] border-[var(--border-default)] text-[var(--text-primary)]">
        <AlertDialogHeader>
          <AlertDialogTitle className={cn('flex items-center gap-2', titleColor)}>
            <Icon className="h-5 w-5" />
            {title}
          </AlertDialogTitle>
          <AlertDialogDescription className="text-[var(--text-secondary)]">
            {description}
          </AlertDialogDescription>
        </AlertDialogHeader>
        <AlertDialogFooter>
          <AlertDialogCancel
            className="bg-[var(--bg-sunken)] border-[var(--border-default)] text-[var(--text-primary)] hover:bg-[var(--bg-elevated)]"
            onClick={handleCancel}
          >
            {cancelText}
          </AlertDialogCancel>
          <AlertDialogAction
            className={cn(actionClass, isLoading && 'opacity-50 cursor-not-allowed')}
            onClick={handleConfirm}
            disabled={isLoading}
          >
            {isLoading ? 'Processing...' : confirmText}
          </AlertDialogAction>
        </AlertDialogFooter>
      </AlertDialogContent>
    </AlertDialog>
  );
}

/**
 * Hook to easily manage a confirmation dialog state.
 * 
 * @example
 * const { dialogProps, showConfirm } = useConfirmDialog();
 * 
 * showConfirm({
 *   title: "Delete Item",
 *   description: "Are you sure?",
 *   onConfirm: () => deleteItem(),
 * });
 */
export function useConfirmDialog() {
  const [dialogState, setDialogState] = useState<{
    open: boolean;
    props: Omit<ConfirmDialogProps, 'open' | 'onOpenChange'>;
  }>({
    open: false,
    props: {
      title: '',
      description: '',
      onConfirm: () => {},
    },
  });

  const showConfirm = (props: Omit<ConfirmDialogProps, 'open' | 'onOpenChange'>) => {
    setDialogState({ open: true, props });
  };

  const dialogProps: ConfirmDialogProps = {
    open: dialogState.open,
    onOpenChange: (open: boolean) => setDialogState(prev => ({ ...prev, open })),
    ...dialogState.props,
  };

  return {
    dialogProps,
    showConfirm,
    ConfirmDialogComponent: <ConfirmDialog {...dialogProps} />,
  };
}

export default ConfirmDialog;