<template>
	<view class="">
		<view class="u-steps" :style="{
				flexDirection: direction
			}">
			<view class="u-steps__item" :class="['u-steps__item--' + direction]" v-for="(item, index) in list"
				:key="index">
				<view class="u-steps__item__num" v-if="mode == 'number'" :style="{
						backgroundColor: current < index ? unActiveColor : activeColor
					}">
					<u-icon size="20" color="#ffffff" :name="icon"></u-icon>
				</view>
				<view class="u-steps__item__dot" v-if="mode == 'dot'" :style="{ 
					backgroundColor: index <= current ? activeColor : unActiveColor 
				}"></view>
				<text class="u-line-1" :style="{ 
					color: index <= current ? activeColor : unActiveColor,
				}" :class="['u-steps__item__text--' + direction]">
					{{ item.name }}
				</text>
				<view class="u-steps__item__line" :style="{width:`calc(calc(100vw - 216rpx - ${(list.length-2)*48}rpx) / ${list.length-1})`}" :class="['u-steps__item__line--' + mode]"
					v-if="index < list.length - 1">
					<u-line :direction="direction" length="100%" :hair-line="false"
						:color="index <= current ? activeColor : unActiveColor"></u-line>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
	/**
	 * steps 步骤条
	 * @description 该组件一般用于完成一个任务要分几个步骤，标识目前处于第几步的场景。
	 * @tutorial https://www.uviewui.com/components/steps.html
	 * @property {String} mode 设置模式（默认dot）
	 * @property {Array} list 数轴条数据，数组。具体见上方示例
	 * @property {String} type type主题（默认primary）
	 * @property {String} direction row-横向，column-竖向（默认row）
	 * @property {Number String} current 设置当前处于第几步
	 * @property {String} active-color 已完成步骤的激活颜色，如设置，type值会失效
	 * @property {String} un-active-color 未激活的颜色，用于表示未完成步骤的颜色（默认#606266）
	 * @example <u-steps :list="numList" active-color="#fa3534"></u-steps>
	 */
	export default {
		name: 'u-steps',
		props: {
			// 步骤条的类型，dot|number
			mode: {
				type: String,
				default: 'dot'
			},
			// 步骤条的数据
			list: {
				type: Array,
				default () {
					return [];
				}
			},
			// 主题类型, primary|success|info|warning|error
			type: {
				type: String,
				default: 'primary'
			},
			// 当前哪一步是激活的
			current: {
				type: [Number, String],
				default: 0
			},
			// 激活步骤的颜色
			activeColor: {
				type: String,
				default: '#6ACDBB'
			},
			// 未激活的颜色
			unActiveColor: {
				type: String,
				default: '#C4C7CC'
			},
			// 自定义图标
			icon: {
				type: String,
				default: 'checkmark'
			},
			// step的排列方向，row-横向，column-竖向
			direction: {
				type: String,
				default: 'row'
			}
		},
		data() {
			return {};
		},
	};
</script>

<style lang="scss" scoped>
	@mixin vue-flex($direction: row) {
		/* #ifndef APP-NVUE */
		display: flex;
		flex-direction: $direction;
		/* #endif */
	}

	$u-steps-item-number-width: 32rpx;
	$u-steps-item-dot-width: 20rpx;

	.u-steps {
		@include vue-flex;
		padding: 0 32rpx;
		justify-content: space-between;
		.u-steps__item {
			text-align: center;
			position: relative;
			width: 96rpx;
			color: #C4C7CC;
			font-size: 24rpx;
			font-family: PingFang SC-Regular, PingFang SC;
			font-weight: 400;
			display: flex !important;
			flex-direction: column !important;
			align-items: center !important;
			&--row {
				position: relative;
				@include vue-flex;
				flex-direction: column;

				.u-steps__item__line {
					position: absolute;
					z-index: 0;
					left: 77%;

					&--dot {
						top: calc(#{$u-steps-item-dot-width} / 2);
					}

					&--number {
						top: calc(#{$u-steps-item-number-width} / 2);
					}
				}
			}

			&--column {
				@include vue-flex;
				flex-direction: row;
				justify-content: flex-start;
				min-height: 120rpx;

				.u-steps__item__line {
					position: absolute;
					z-index: 0;
					height: 50%;
					top: 40vw;

					&--dot {
						left: calc(#{$u-steps-item-dot-width} / 2);
					}

					&--number {
						left: calc(#{$u-steps-item-number-width} / 2);
					}
				}
			}

			&__num {
				@include vue-flex;
				align-items: center;
				justify-content: center;
				width: $u-steps-item-number-width;
				height: $u-steps-item-number-width;
				border-radius: 50%;
				overflow: hidden;
			}

			&__dot {
				width: $u-steps-item-dot-width;
				height: $u-steps-item-dot-width;
				@include vue-flex;
				border-radius: $u-steps-item-dot-width;
			}

			&__text--row {
				margin-top: 14rpx;
			}

			&__text--column {
				margin-left: 14rpx;
			}
		}
	}
</style>
