"use client";

import { useEffect, useRef, useState } from "react";

interface Point {
  norm_x: number;
  norm_y: number;
}

interface Impact {
  id: number;
  label: string;
  score: number;
  coords: Point;
}

interface PhotoOverlayProps {
  imageUrl: string;
  impacts: Impact[];
  targetCorners: Point[];
  isEditing?: boolean;
  onImpactsChange?: (impacts: Impact[]) => void;
}

export default function PhotoOverlay({
  imageUrl,
  impacts,
  targetCorners,
  isEditing = false,
  onImpactsChange
}: PhotoOverlayProps) {
  const containerRef = useRef<HTMLDivElement>(null);
  const [dimensions, setDimensions] = useState({ width: 0, height: 0 });
  const [dragIndex, setDragIndex] = useState<number | null>(null);

  useEffect(() => {
    const updateDimensions = () => {
      if (containerRef.current) {
        setDimensions({
          width: containerRef.current.offsetWidth,
          height: containerRef.current.offsetHeight,
        });
      }
    };

    updateDimensions();
    window.addEventListener("resize", updateDimensions);
    return () => window.removeEventListener("resize", updateDimensions);
  }, []);

  const handleImageClick = (e: React.MouseEvent) => {
    if (!isEditing || !onImpactsChange || dragIndex !== null) return;

    const rect = containerRef.current?.getBoundingClientRect();
    if (!rect) return;

    // Calculer les coordonnées normalisées
    const x = (e.clientX - rect.left) / dimensions.width;
    const y = (e.clientY - rect.top) / dimensions.height;

    // Créer un nouvel impact
    const newImpact: Impact = {
      id: impacts.length > 0 ? Math.max(...impacts.map(i => i.id)) + 1 : 1,
      label: "bullet_hole",
      score: 10,
      coords: { norm_x: x, norm_y: y }
    };

    onImpactsChange([...impacts, newImpact]);
  };

  const handleMouseMove = (e: React.MouseEvent) => {
    if (dragIndex === null || !onImpactsChange) return;

    const rect = containerRef.current?.getBoundingClientRect();
    if (!rect) return;

    const x = (e.clientX - rect.left) / dimensions.width;
    const y = (e.clientY - rect.top) / dimensions.height;

    const newImpacts = [...impacts];
    newImpacts[dragIndex] = {
      ...newImpacts[dragIndex],
      coords: { norm_x: x, norm_y: y }
    };

    onImpactsChange(newImpacts);
  };

  const deleteImpact = (e: React.MouseEvent, index: number) => {
    e.stopPropagation();
    if (!isEditing || !onImpactsChange) return;
    const newImpacts = impacts.filter((_, i) => i !== index);
    onImpactsChange(newImpacts);
  };

  return (
    <div
      ref={containerRef}
      className={`relative w-full flex items-center justify-center bg-slate-900 rounded-2xl overflow-hidden border border-slate-800 shadow-2xl min-h-[400px] ${isEditing ? 'cursor-crosshair' : ''}`}
      onClick={handleImageClick}
      onMouseMove={handleMouseMove}
      onMouseUp={() => setDragIndex(null)}
      onMouseLeave={() => setDragIndex(null)}
    >
      {/* eslint-disable-next-line @next/next/no-img-element */}
      <img
        src={imageUrl}
        alt="Target Analysis"
        className="max-w-full max-h-[80vh] object-contain select-none"
        draggable={false}
        onLoad={(e) => {
          const img = e.currentTarget;
          setDimensions({ width: img.clientWidth, height: img.clientHeight });
        }}
      />

      {dimensions.width > 0 && (
        <svg
          className="absolute pointer-events-none"
          viewBox={`0 0 ${dimensions.width} ${dimensions.height}`}
          style={{ width: dimensions.width, height: dimensions.height }}
        >
          {/* Draw Target Box if corners exist */}
          {targetCorners && targetCorners.length === 4 && (
            <polygon
              points={targetCorners.map(c => `${c.norm_x * dimensions.width},${c.norm_y * dimensions.height}`).join(' ')}
              fill="rgba(79, 70, 229, 0.15)"
              stroke="#6366f1"
              strokeWidth="2"
              strokeDasharray="4 2"
            />
          )}

          {/* Draw Impacts */}
          {impacts.map((impact, index) => (
            <g key={impact.id}>
              {/* Glow effect */}
              <circle
                cx={impact.coords.norm_x * dimensions.width}
                cy={impact.coords.norm_y * dimensions.height}
                r={isEditing ? "12" : "8"}
                fill={isEditing ? "rgba(244, 63, 94, 0.2)" : "rgba(244, 63, 94, 0.3)"}
                className={isEditing ? 'pointer-events-auto cursor-move' : ''}
                onMouseDown={(e) => {
                  if (!isEditing) return;
                  e.stopPropagation();
                  setDragIndex(index);
                }}
                onContextMenu={(e) => deleteImpact(e, index)}
              />
              {/* Main circle */}
              <circle
                cx={impact.coords.norm_x * dimensions.width}
                cy={impact.coords.norm_y * dimensions.height}
                r="5"
                fill="#f43f5e"
                stroke="white"
                strokeWidth="1.5"
              />
              {/* Score text */}
              <text
                x={impact.coords.norm_x * dimensions.width}
                y={impact.coords.norm_y * dimensions.height - 10}
                className="text-[12px] font-bold fill-white text-center select-none"
                textAnchor="middle"
                style={{ textShadow: '0 0 4px rgba(0,0,0,0.9), 1px 1px 0 rgba(0,0,0,0.9)' }}
              >
                {impact.score}
              </text>
            </g>
          ))}
        </svg>
      )}

      {isEditing && (
        <div className="absolute bottom-4 right-4 bg-slate-950/80 backdrop-blur-md px-3 py-1.5 rounded-full text-[10px] font-bold text-indigo-400 border border-indigo-500/30">
          MODE ÉDITION : CLIC POUR AJOUTER • DRAG POUR DÉPLACER • CLIC DROIT POUR SUPPRIMER
        </div>
      )}
    </div>
  );
}