import React, { useState, useRef, useCallback } from 'react'

interface SplitterProps {
  direction: 'horizontal' | 'vertical'
  initialSize: number
  minSize?: number
  maxSize?: number
  children: [React.ReactNode, React.ReactNode]
  className?: string
  reverse?: boolean // İkinci panel için boyut kontrolü
}

export const Splitter: React.FC<SplitterProps> = ({
  direction,
  initialSize,
  minSize = 200,
  maxSize = 800,
  children,
  className = '',
  reverse = false,
}) => {
  const [size, setSize] = useState(initialSize)
  const [isDragging, setIsDragging] = useState(false)
  const splitterRef = useRef<HTMLDivElement>(null)
  const containerRef = useRef<HTMLDivElement>(null)

  const handleMouseDown = useCallback(
    (e: React.MouseEvent) => {
      e.preventDefault()
      setIsDragging(true)

      const handleMouseMove = (e: MouseEvent) => {
        if (!splitterRef.current || !containerRef.current) return

        const rect = containerRef.current.getBoundingClientRect()
        let newSize: number

        if (direction === 'horizontal') {
          if (reverse) {
            // İkinci panel için boyut kontrolü - sağdan ölçüm
            newSize = rect.right - e.clientX
          } else {
            // İlk panel için boyut kontrolü - soldan ölçüm
            newSize = e.clientX - rect.left
          }
        } else {
          if (reverse) {
            // İkinci panel için boyut kontrolü - alttan ölçüm
            newSize = rect.bottom - e.clientY
          } else {
            // İlk panel için boyut kontrolü - üstten ölçüm
            newSize = e.clientY - rect.top
          }
        }

        newSize = Math.max(minSize, Math.min(maxSize, newSize))
        setSize(newSize)
      }

      const handleMouseUp = () => {
        setIsDragging(false)
        document.removeEventListener('mousemove', handleMouseMove)
        document.removeEventListener('mouseup', handleMouseUp)
      }

      document.addEventListener('mousemove', handleMouseMove)
      document.addEventListener('mouseup', handleMouseUp)
    },
    [direction, minSize, maxSize, reverse],
  )

  const isHorizontal = direction === 'horizontal'

  return (
    <div
      ref={containerRef}
      className={`flex flex-1 min-h-0 ${
        isHorizontal ? 'flex-row' : 'flex-col'
      } h-full w-full ${className}`}
    >
      {reverse ? (
        <>
          <div className="flex-1 h-screen overflow-hidden min-w-0 min-h-0">{children[0]}</div>

          <div
            ref={splitterRef}
            className={`
              ${isHorizontal ? 'w-1 cursor-col-resize' : 'h-1 cursor-row-resize'}
              bg-gray-300 dark:bg-gray-700 hover:bg-blue-500 dark:hover:bg-blue-600 transition-colors duration-200 flex-shrink-0
              ${isDragging ? 'bg-blue-500 dark:bg-blue-600' : ''}
            `}
            onMouseDown={handleMouseDown}
          />

          <div
            style={{
              [isHorizontal ? 'width' : 'height']: `${size}px`,
              [isHorizontal ? 'minWidth' : 'minHeight']: `${size}px`,
              [isHorizontal ? 'maxWidth' : 'maxHeight']: `${size}px`,
            }}
            className="overflow-hidden"
          >
            {children[1]}
          </div>
        </>
      ) : (
        <>
          <div
            style={{
              [isHorizontal ? 'width' : 'height']: `${size}px`,
              [isHorizontal ? 'minWidth' : 'minHeight']: `${size}px`,
              [isHorizontal ? 'maxWidth' : 'maxHeight']: `${size}px`,
            }}
            className="overflow-hidden"
          >
            {children[0]}
          </div>

          <div
            ref={splitterRef}
            className={`
              ${isHorizontal ? 'w-1 cursor-col-resize' : 'h-1 cursor-row-resize'}
              bg-gray-300 dark:bg-gray-700 hover:bg-blue-500 dark:hover:bg-blue-600 transition-colors duration-200 flex-shrink-0
              ${isDragging ? 'bg-blue-500 dark:bg-blue-600' : ''}
            `}
            onMouseDown={handleMouseDown}
          />

          <div className="flex-1 h-screen overflow-hidden min-w-0 min-h-0">{children[1]}</div>
        </>
      )}
    </div>
  )
}