<script>
export default {
  name: 'MCheckbox',
}
</script>
<script setup>
import { inject, computed } from 'vue'

const checkboxGroup = inject('CheckboxGroup', '')

const props = defineProps({
  label: {
    type: String,
    defualt: ''
  },
  modelValue: {
    type: Boolean
  },
  name: {
    type: String,
    defualt: ''
  }
})

const emit = defineEmits([
  'update:modelValue'
])

const model = computed({
  get: () => {
    return isGroup.value ? checkboxGroup.props.modelValue : props.modelValue
  },

  set: (value) => {
    if (isGroup.value) {
      checkboxGroup.emit('update:modelValue', value)
    } else {
      emit('update:modelValue', value)
    }
  }
})

// 用于判断 radio 是否被 radio-group 包裹
const isGroup = computed(() => !!checkboxGroup)

const isCheckbox = computed(() => {
  if (isGroup.value) {
    return model.value.includes(props.label)
  } else {
    return model.value
  }
})
</script>

<template>
  <label class="m-checkbox" :class="{'is-checked': isCheckbox}">
    <span class="m-checkbox__input">
      <span class="m-checkbox__inner"></span>
      <input
        v-model="model"
        type="checkbox"
        class="m-checkbox__original"
        :name="name"
        :value="label"
      />
    </span>
    <span class="m-checkbox__label">
      <slot></slot>
      <template v-if="!$slots.default">
        {{ label }}
      </template>
    </span>
  </label>
</template>

<style lang="scss" scoped>
.m-checkbox {
  color: #606266;
  font-weight: 500;
  font-size: 14px;
  position: relative;
  cursor: pointer;
  display: inline-block;
  white-space: nowrap;
  user-select: none;
  margin-right: 30px;

  .m-checkbox__input {
    white-space: nowrap;
    cursor: pointer;
    outline: none;
    display: inline-block;
    line-height: 1;
    position: relative;
    vertical-align: middle;

    .m-checkbox__inner {
      display: inline-block;
      position: relative;
      border: 1px solid #dcdfe6;
      border-radius: 2px;
      box-sizing: border-box;
      width: 14px;
      height: 14px;
      background-color: #fff;
      z-index: 1;
      transition: border-color .25s cubic-bezier(.71,-.46,.29,1.46),background-color .25s,cubic-bezier(.71,-.46,.29,1.46);

      &:after {
        box-sizing: content-box;
        content: '';
        border: 1px solid #ffffff;
        border-left: 0;
        border-top: 0;
        height: 7px;
        left: 4px;
        position: absolute;
        top: 1px;
        transform: rotate(45deg) scaleY(0);
        width: 3px;
        transition: transform .15s ease-in .05s;
        transform-origin: center;
      }
    }

    .m-checkbox__original {
      opacity: 0;
      outline: none;
      position: absolute;
      left: 10px;
      margin: 0;
      width: 0;
      height: 0;
      z-index: -1;
    }
  }

  .m-checkbox__label {
    display: inline-block;
    padding-left: 10px;
    line-height: 19px;
    font-size: 14px;
  }
}

// 选中的样式
.m-checkbox.is-checked {

  .m-checkbox__input {
    .m-checkbox__inner {
      background-color: #409eff;
      border-color: #409eff;
      &:after{
        transform: rotate(45deg) scaleY(1);
      }
    }
  }

  .m-checkbox__label {
    color: #409eff;
  }
}
</style>
