<template>
  <view class="y-f" style="height: 55vh">
    <view class="weight">
      <view class="weight-data">{{ nums }}</view>
    </view>

    <view class="keyboard-container">
      <view class="keypad">
        <view
          class="oner"
          :style="getListItemStyle(index)"
          v-for="(item, index) in numbers"
          :key="'num_' + index"
          @click="changeNums(item, index)"
        >
          {{ item.text }}
        </view>
      </view>
      <view class="func-pad">
        <view @click="jianshao()" class="oner flex1">
          <u-icon name="arrow-leftward" bold></u-icon>
        </view>
        <view @click="setNull()" class="oner flex1 mt10 mb10">清空</view>
        <view class="oner confirm" @click="ok()">确认</view>
      </view>
    </view>
  </view>
</template>

<script setup>
import { ref, computed } from 'vue'

// Props
const props = defineProps({
  numKeyboardParam: {
    type: Object,
    default: () => null
  }
})

// Emits（虽然你用的是 uni.$emit，但也可以定义 emit 用于规范）
// const emit = defineEmits(['keyboardOK'])

// Data
const nums = ref('')
const numbers = ref([
  { text: '1' },
  { text: '2' },
  { text: '3' },
  { text: '4' },
  { text: '5' },
  { text: '6' },
  { text: '7' },
  { text: '8' },
  { text: '9' },
  { text: '0' },
  { text: '-' },
  { text: '.' }
])

// Methods
const ok = () => {
  const val = { val: nums.value }
  nums.value = ''
  if (val.val) {
    uni.$emit('keyboardOK', val)
  }
}

const setNull = () => {
  nums.value = ''
  uni.$emit('keyboardOK', null)
}
const clearNum = () => {
  nums.value = ''
}
const jianshao = () => {
  if (nums.value) {
    nums.value = nums.value.substring(0, nums.value.length - 1)
  }
}

const changeNums = (item, index) => {
  if (item.text === '.') {
    if (nums.value.indexOf('.') !== -1 || nums.value.length === 0) {
      return false
    }
  }

  // 检查小数位数限制
  let decimal = props.numKeyboardParam?.decimal ?? -1
  const parts = nums.value.split('.')
  if (parts.length === 2 && decimal !== -1) {
    if (parts[1].length >= decimal) {
      return false
    }
  }

  nums.value += item.text
}

const getListItemStyle = index => {
  return {
    background: numbers.value[index]?.background || ''
  }
}
defineExpose({ clearNum })
</script>

<style lang="scss" scoped>
.keyboard-container {
  flex: 5;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(232, 232, 232, 0.98);
}
.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 1fr;
  gap: 10px;
  padding: 10px;
  flex: 4;
  height: 95%;
}

.oner {
  width: 95%;
  font-size: 20px;
  border: none;
  border-radius: 5px;
  background-color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
}

.func-pad {
  height: 100%;
  display: flex;
  padding: 10px 10px 10px 0;
  flex-direction: column;
  flex: 1;
  box-sizing: border-box;
}
.confirm {
  flex: 2;
  color: #ffffff;
  background-color: #19be6b;
}
.weight {
  width: 100%;
  background-color: #2c405a;
  flex: 1;
  padding: 8px;
  box-sizing: border-box;
}

.weight-data {
  color: #4cd964;
  text-align: right;
  letter-spacing: 5px;
  font-size: 50px;
  font-family: zzjc-lcd;
  height: 40px;
}
</style>
