import React, { memo, useMemo } from 'react'
import { Pressable } from 'react-native'
import { Canvas, Group, Paragraph, Path, Skia, useFonts } from '@shopify/react-native-skia'

export type ParallelogramButtonProps = {
  label: string
  state: string
  isActive: boolean
  onPress: () => void
  width: number
  height: number
}

const ParallelogramButton = memo<ParallelogramButtonProps>(function ParallelogramButton({
  label,
  state,
  isActive,
  onPress,
  width,
  height,
}) {
  const fontMgr = useFonts({
    System: [],
  })

  // 创建英文 state 标签段落（白色字体，黑色描边，字重 700，激活时 #FAE307，未激活时白色）
  const stateParagraph = useMemo(() => {
    if (!fontMgr) return null
    const para = Skia.ParagraphBuilder.Make({}, fontMgr)
      .pushStyle({
        color: isActive ? Skia.Color('#FAE307') : Skia.Color('#FFFFFF'),
        fontSize: 7,
        fontFamilies: ['System'],
        fontStyle: { weight: 700 },
        shadows: [
          // 黑色描边效果（略微偏移，避免过粗）
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: -0.5, y: -0.5 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 0.5, y: -0.5 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: -0.5, y: 0.5 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 0.5, y: 0.5 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: -0.5, y: 0 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 0.5, y: 0 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 0, y: -0.5 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 0, y: 0.5 } },
        ],
      })
      .addText(state)
      .build()
    para.layout(40)
    return para
  }, [fontMgr, state, isActive])

  // 创建白色字体带黑色描边的中文文本段落
  const paragraph = useMemo(() => {
    if (!fontMgr) return null
    const para = Skia.ParagraphBuilder.Make({}, fontMgr)
      .pushStyle({
        color: Skia.Color('#FFFFFF'),
        fontSize: 13,
        fontFamilies: ['System'],
        fontStyle: { weight: 900 },
        shadows: [
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: -1, y: -1 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 1, y: -1 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: -1, y: 1 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 1, y: 1 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: -1, y: 0 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 1, y: 0 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 0, y: -1 } },
          { color: Skia.Color('#000000'), blurRadius: 0, offset: { x: 0, y: 1 } },
        ],
      })
      .addText(label)
      .build()
    para.layout(width - 12) // 减去左右 padding
    return para
  }, [fontMgr, label, width])

  const skewOffset = 8 // 倾斜偏移量（像素）
  const padding = 15 // 增加 padding，防止旋转后的文本被裁剪

  // 创建平行四边形路径：只有左右边倾斜，上下边保持水平
  const parallelogramPath = useMemo(() => {
    const path = Skia.Path.Make()
    // 四个顶点：左上、右上、右下、左下（加上 padding 偏移）
    path.moveTo(skewOffset + padding, padding)
    path.lineTo(width + padding, padding)
    path.lineTo(width - skewOffset + padding, height + padding)
    path.lineTo(padding, height + padding)
    path.close()
    return path
  }, [width, height, skewOffset, padding])

  // 创建边框路径
  const borderPath = useMemo(() => {
    const path = Skia.Path.Make()
    path.moveTo(skewOffset + padding + 1, padding + 1)
    path.lineTo(width + padding - 1, padding + 1)
    path.lineTo(width - skewOffset + padding - 1, height + padding - 1)
    path.lineTo(padding + 1, height + padding - 1)
    path.close()
    return path
  }, [width, height, skewOffset, padding])

  // 计算实际画布尺寸（包含 padding）
  const canvasWidth = width + padding * 2
  const canvasHeight = height + padding * 2

  // 注意：布局占位仍然使用原始 width，避免改变 tab 间距
  return (
    <Pressable onPress={onPress} style={{ width, height: canvasHeight }}>
      <Canvas
        style={{
          width: canvasWidth,
          height: canvasHeight,
          // 向左偏移 padding，让额外画布空间不参与横向布局计算
          marginLeft: -padding,
        }}
      >
        {/* 背景 - 平行四边形 */}
        <Path
          path={parallelogramPath}
          color={isActive ? Skia.Color('#FFE500') : Skia.Color('#FFFFFF')}
        />

        {/* 边框 - 平行四边形 */}
        <Path path={borderPath} color={Skia.Color('#000000')} style="stroke" strokeWidth={2} />

        {/* 英文 state 标签 - 左上角，以左下角为中心，逆时针旋转 15 度 */}
        {stateParagraph && (() => {
          const stateTextX = 8 + skewOffset / 2 + 10 + padding
          const stateTextY = 4 + padding
          const rotationAngle = (-15 * Math.PI) / 180
          const centerX = padding
          const centerY = height + padding

          return (
            <Group
              transform={[
                { translateX: centerX },
                { translateY: centerY },
                { rotate: rotationAngle },
                { translateX: -centerX + stateTextX },
                { translateY: -centerY + stateTextY },
              ]}
            >
              <Paragraph paragraph={stateParagraph} x={0} y={0} width={40} />
            </Group>
          )
        })()}

        {/* 中文文本 - 以左下角为中心，逆时针旋转 15 度 */}
        {paragraph && (() => {
          const textX = 16 + skewOffset / 2 + 2 + padding
          const textY = height - paragraph.getHeight() + 1 + padding
          const rotationAngle = (-15 * Math.PI) / 180
          const centerX = padding
          const centerY = height + padding

          return (
            <Group
              transform={[
                { translateX: centerX },
                { translateY: centerY },
                { rotate: rotationAngle },
                { translateX: -centerX + textX },
                { translateY: -centerY + textY },
              ]}
            >
              <Paragraph paragraph={paragraph} x={0} y={0} width={width - 32 - skewOffset} />
            </Group>
          )
        })()}
      </Canvas>
    </Pressable>
  )
})

ParallelogramButton.displayName = 'ParallelogramButton'

export default ParallelogramButton