<template>
  <div class="d-100 mb-5">
    <div
      class="rounded pa-5 mb-2 d-100 text-center caption"
      :style="{background:value}"
      @click="generateGradient"
    >
      Click to change gradient
    </div>

    <input v-model="color1" type="color">
    <input v-model="color2" type="color">
  </div>
</template>

<script>
export default {
  name: 'GradientGenerator',
  props: {
    value: [String]
  },
  data: () => ({
    angle: 0
  }),
  computed: {
    color1: {
      get() {
        const val = this.value && this.value.split(',')[1].trim()
        return val
      },
      set(v) {
        const gradient = 'linear-gradient(' + this.angle + 'deg, ' + v + ', ' + this.color2 + ')'
        this.$emit('input', gradient)
      }
    },
    color2: {
      get() {
        return this.value && this.value.split(',')[2].slice(0, -1).trim()
      },
      set(v) {
        const gradient = 'linear-gradient(' + this.angle + 'deg, ' + this.color1 + ', ' + v + ')'
        this.$emit('input', gradient)
      }
    }
  },
  created() {
    if (!this.color1 && !this.color2) {
      this.generateGradient()
    }
  },
  methods: {

    generateGradient() {
      const hexValues = '0123456789abcde'

      function populate(a) {
        for (let i = 0; i < 6; i++) {
          const x = Math.round(Math.random() * 14)
          const y = hexValues[x]
          a += y
        }
        return a
      }

      const newColor1 = populate('#')
      const newColor2 = populate('#')
      this.angle = Math.round(Math.random() * 360)
      const gradient = 'linear-gradient(' + this.angle + 'deg, ' + newColor1 + ', ' + newColor2 + ')'
      this.$emit('input', gradient)
    }
  }
}
</script>

<style scoped>

</style>
