<template>
    <div class="theme-color" :style="{backgroundColor: color}" @click="toggle">
        <a-icon v-if="sChecked" type="check" />
    </div>
</template>

<script>
const Group = {
    name: 'ColorCheckboxGroup',
    props: {
        defaultValues: {
            type: Array,
            required: false,
            default: () => [],
        },
        multiple: {
            type: Boolean,
            required: false,
            default: false,
        },
    },
    data() {
        return {
            values: [],
            options: [],
        };
    },
    computed: {
        colors() {
            let colors = [];
            this.options.forEach((item) => {
                if (item.sChecked) {
                    colors.push(item.color);
                }
            });
            return colors;
        },
    },
    provide() {
        return {
            groupContext: this,
        };
    },
    watch: {
        values(value) {
            this.$emit('change', value, this.colors);
        },
    },
    methods: {
        handleChange(option) {
            if (!option.checked) {
                if (this.values.indexOf(option.value) > -1) {
                    this.values = this.values.filter((item) => item != option.value);
                }
            } else {
                if (!this.multiple) {
                    this.values = [option.value];
                    this.options.forEach((item) => {
                        if (item.value != option.value) {
                            item.sChecked = false;
                        }
                    });
                } else {
                    this.values.push(option.value);
                }
            }
        },
    },
    render(h) {
        const clear = h('div', { attrs: { style: 'clear: both' } });
        return h('div', {}, [this.$slots.default, clear]);
    },
};

export default {
    name: 'ColorCheckbox',
    Group: Group,
    props: {
        color: {
            type: String,
            required: true,
        },
        value: {
            type: [String, Number],
            required: true,
        },
        checked: {
            type: Boolean,
            required: false,
            default: false,
        },
    },
    data() {
        return {
            sChecked: this.initChecked(),
        };
    },
    computed: {},
    inject: ['groupContext'],
    watch: {
        sChecked: function () {
            const value = {
                value: this.value,
                color: this.color,
                checked: this.sChecked,
            };
            this.$emit('change', value);
            const groupContext = this.groupContext;
            if (groupContext) {
                groupContext.handleChange(value);
            }
        },
    },
    created() {
        const groupContext = this.groupContext;
        if (groupContext) {
            groupContext.options.push(this);
        }
    },
    methods: {
        toggle() {
            if (this.groupContext.multiple || !this.sChecked) {
                this.sChecked = !this.sChecked;
            }
        },
        initChecked() {
            let groupContext = this.groupContext;
            if (!groupContext) {
                return this.checked;
            } else if (groupContext.multiple) {
                return groupContext.defaultValues.indexOf(this.value) > -1;
            } else {
                return groupContext.defaultValues[0] == this.value;
            }
        },
    },
};
</script>

<style lang="less" scoped>
.theme-color {
    float: left;
    width: 20px;
    height: 20px;
    border-radius: 2px;
    cursor: pointer;
    margin-right: 8px;
    text-align: center;
    color: @base-bg-color;
    font-weight: bold;
}
</style>
