<template>
  <div
    @click="tryClose"
    data-notify="container"
    class="alert"
    :class="[
      { 'alert-with-icon': icon || showClose },
      verticalAlign,
      horizontalAlign,
      alertType
    ]"
    role="alert"
    :style="customPosition"
    data-notify-position="top-center"
  >
    <button
      v-if="showClose"
      type="button"
      aria-hidden="true"
      class="close"
      data-notify="dismiss"
      @click="close"
    >
      <i class="nc-icon nc-simple-remove"></i>
    </button>

    <span v-if="icon" data-notify="icon" :class="['alert-icon', icon]"></span>
    <span data-notify="message">
      <div v-if="title" class="title">
        <b>{{ title }}<br /></b>
      </div>
      <div v-if="message" v-html="message"></div>
      <content-render
        v-if="!message && component"
        :component="component"
      ></content-render>
    </span>
  </div>
</template>
<script>
export default {
  name: "notification",
  components: {
    contentRender: {
      props: ["component"],
      render(h) {
        return h(this.component);
      }
    }
  },
  props: {
    message: String,
    title: String,
    icon: String,
    verticalAlign: {
      type: String,
      default: "top",
      validator: value => {
        let acceptedValues = ["top", "bottom"];
        return acceptedValues.indexOf(value) !== -1;
      }
    },
    horizontalAlign: {
      type: String,
      default: "right",
      validator: value => {
        let acceptedValues = ["left", "center", "right"];
        return acceptedValues.indexOf(value) !== -1;
      }
    },
    type: {
      type: String,
      default: "info",
      validator: value => {
        let acceptedValues = [
          "info",
          "primary",
          "danger",
          "warning",
          "success"
        ];
        return acceptedValues.indexOf(value) !== -1;
      }
    },
    timeout: {
      type: Number,
      default: 5000,
      validator: value => {
        return value >= 0;
      }
    },
    timestamp: {
      type: Date,
      default: () => new Date()
    },
    component: {
      type: [Object, Function]
    },
    showClose: {
      type: Boolean,
      default: true
    },
    closeOnClick: {
      type: Boolean,
      default: true
    },
    clickHandler: Function
  },
  data() {
    return {
      elmHeight: 0
    };
  },
  computed: {
    hasIcon() {
      return this.icon && this.icon.length > 0;
    },
    alertType() {
      return `alert-${this.type}`;
    },
    customPosition() {
      let initialMargin = 20;
      let alertHeight = this.elmHeight + 10;
      let sameAlertsCount = this.$notifications.state.filter(alert => {
        return (
          alert.horizontalAlign === this.horizontalAlign &&
          alert.verticalAlign === this.verticalAlign &&
          alert.timestamp <= this.timestamp
        );
      }).length;
      if (this.$notifications.settings.overlap) {
        sameAlertsCount = 1;
      }
      let pixels = (sameAlertsCount - 1) * alertHeight + initialMargin;
      let styles = {};
      if (this.verticalAlign === "top") {
        styles.top = `${pixels}px`;
      } else {
        styles.bottom = `${pixels}px`;
      }
      return styles;
    }
  },
  methods: {
    close() {
      this.$emit("close", this.timestamp);
    },
    tryClose(evt) {
      if (this.clickHandler) {
        this.clickHandler(evt, this);
      }
      if (this.closeOnClick) {
        this.close();
      }
    }
  },
  mounted() {
    this.elmHeight = this.$el.clientHeight;
    if (this.timeout) {
      setTimeout(this.close, this.timeout);
    }
  }
};
</script>
<style lang="scss">
.notifications .alert {
  position: fixed;
  z-index: 10000;

  &[data-notify="container"] {
    width: 480px;
    cursor: pointer;
  }

  &.center {
    left: 0px;
    right: 0px;
    margin: 0 auto;
  }
  &.left {
    left: 20px;
  }
  &.right {
    right: 20px;
  }
}
</style>
