import React, { useState, useRef, useEffect } from "react";
import ReactCrop from "react-image-crop";
import "react-image-crop/dist/ReactCrop.css";
import { FiX, FiScissors } from "react-icons/fi";

const ResizableCropper = ({ imageSrc, onCropComplete, onCancel, onNext, currentIndex, total }) => {
  const [crop, setCrop] = useState({ unit: "%", width: 80, height: 100, aspect: 4 / 5 });
  const [completedCrop, setCompletedCrop] = useState(null);
  const [screenSize, setScreenSize] = useState('desktop');
  const imgRef = useRef(null);

  useEffect(() => {
    const updateScreenSize = () => {
      const width = window.innerWidth;
      if (width <= 480) setScreenSize('mobile');
      else if (width <= 768) setScreenSize('tablet');
      else if (width <= 1024) setScreenSize('laptop');
      else setScreenSize('desktop');
    };

    updateScreenSize();
    window.addEventListener('resize', updateScreenSize);
    return () => window.removeEventListener('resize', updateScreenSize);
  }, []);

  // Convert crop to base64 image
  const getCroppedImage = () => {
    if (!imgRef.current || !completedCrop?.width || !completedCrop?.height) return null;

    const canvas = document.createElement("canvas");
    const scaleX = imgRef.current.naturalWidth / imgRef.current.width;
    const scaleY = imgRef.current.naturalHeight / imgRef.current.height;

    canvas.width = completedCrop.width * scaleX;
    canvas.height = completedCrop.height * scaleY;

    const ctx = canvas.getContext("2d");
    ctx.drawImage(
      imgRef.current,
      completedCrop.x * scaleX,
      completedCrop.y * scaleY,
      completedCrop.width * scaleX,
      completedCrop.height * scaleY,
      0,
      0,
      completedCrop.width * scaleX,
      completedCrop.height * scaleY
    );

    return canvas.toDataURL("image/jpeg");
  };

  const handleNext = () => {
    const cropped = getCroppedImage();
    if (cropped) onCropComplete(cropped);
    if (onNext) onNext();
  };

  const getResponsiveStyles = () => {
    switch (screenSize) {
      case 'mobile':
        return {
          containerPadding: "12px",
          imagePadding: 8,
          maxHeight: "250px",
          buttonPadding: "14px 20px",
          fontSize: 13,
          iconSize: 16,
          gap: 8,
          direction: 'row',
          borderRadius: 8
        };
      case 'tablet':
        return {
          containerPadding: "16px",
          imagePadding: 12,
          maxHeight: "320px",
          buttonPadding: "12px 18px",
          fontSize: 13,
          iconSize: 16,
          gap: 10,
          direction: 'row',
          borderRadius: 10
        };
      case 'laptop':
        return {
          containerPadding: "18px",
          imagePadding: 14,
          maxHeight: "380px",
          buttonPadding: "12px 20px",
          fontSize: 14,
          iconSize: 16,
          gap: 12,
          direction: 'row',
          borderRadius: 12
        };
      default:
        return {
          containerPadding: "20px",
          imagePadding: 16,
          maxHeight: "400px",
          buttonPadding: "12px 20px",
          fontSize: 14,
          iconSize: 16,
          gap: 12,
          direction: 'row',
          borderRadius: 12
        };
    }
  };

  const styles = getResponsiveStyles();

  const buttonStyle = {
    padding: styles.buttonPadding,
    border: "none",
    borderRadius: 8,
    cursor: "pointer",
    fontSize: styles.fontSize,
    fontWeight: 500,
    transition: "all 0.3s ease",
    boxShadow: "0 2px 4px rgba(0,0,0,0.1)",
    display: "flex",
    alignItems: "center",
    gap: 6,
    width: screenSize === 'mobile' ? '100%' : 'auto',
    justifyContent: 'center',
    minHeight: screenSize === 'mobile' ? '48px' : 'auto'
  };

  return (
    <div style={{
      textAlign: "center",
      marginTop: screenSize === 'mobile' ? 12 : 20,
      padding: styles.containerPadding,
      backgroundColor: "#f8f9fa",
      borderRadius: styles.borderRadius,
      margin: screenSize === 'mobile' ? '12px 8px' : '20px auto',
      maxWidth: screenSize === 'mobile' ? '100%' : '500px'
    }}>
      {/* {screenSize !== 'mobile' && (
        <div style={{ marginBottom: 16 }}>
          <h3 style={{ margin: 0, color: "#333", fontSize: screenSize === 'tablet' ? 16 : 18 }}>
            Crop Image {currentIndex + 1} of {total}
          </h3>
        </div>
      )} */}

      <div style={{
        backgroundColor: "#fff",
        padding: styles.imagePadding,
        borderRadius: 8,
        boxShadow: "0 2px 8px rgba(0,0,0,0.1)",
        overflow: 'hidden'
      }}>
        {screenSize === 'mobile' && (
          <div style={{ marginBottom: 8, fontSize: 12, color: "#666" }}>
            Image {currentIndex + 1} of {total}
          </div>
        )}
        <ReactCrop
          crop={crop}
          onChange={(newCrop) => setCrop(newCrop)}
          onComplete={(newCrop) => setCompletedCrop(newCrop)}
          keepSelection={true}
        >
          <img
            ref={imgRef}
            src={imageSrc}
            alt="Preview"
            style={{
              maxWidth: "100%",
              maxHeight: styles.maxHeight,
              borderRadius: 4,
              touchAction: 'none'
            }}
          />
        </ReactCrop>
      </div>

      <div style={{
        marginTop: screenSize === 'mobile' ? 16 : 20,
        display: "flex",
        flexDirection: styles.direction,
        justifyContent: "center",
        gap: styles.gap,
        padding: screenSize === 'mobile' ? '0 4px' : '0'
      }}>
        <button
          onClick={onCancel}
          style={{
            ...buttonStyle,
            backgroundColor: "#6c757d",
            color: "#fff",
            fontFamily: "Poppins"
          }}
          onMouseOver={(e) => e.target.style.backgroundColor = "#5a6268"}
          onMouseOut={(e) => e.target.style.backgroundColor = "#6c757d"}
        >
          <FiX size={styles.iconSize} />
          {screenSize === 'mobile' ? 'Cancel' : 'Cancel All'}
        </button>
        <button
          onClick={handleNext}
          style={{
            ...buttonStyle,
            backgroundColor: "#1890ff",
            color: "#fff",
            fontFamily: "Poppins"
          }}
          onMouseOver={(e) => e.target.style.backgroundColor = "#096dd9"}
          onMouseOut={(e) => e.target.style.backgroundColor = "#1890ff"}
        >
          <FiScissors size={styles.iconSize} />
          {screenSize === 'mobile' ? 'Crop' : 'Crop '}
        </button>
      </div>
    </div>
  );
};

export default ResizableCropper;