Component({
    options: {
        addGlobalClass: true
    },
    properties: {
        iconName: {
            type: String,
            value: "icon-rili1"
        },
        title: {
            type: String,
        },
        onChange: {
            type: Function,
        },
        fields: {
            type: String,
            value: "day", //有效值 year,month,day，表示选择器的粒度
        },
        end: {
            type: [String, Number]
        },
        start: {
            type: [String, Number]
        },

        type: {
            type: String,
            value: ""
        },
        startMonth: {
            type: [String, Number],
            value: 1
        },
        endMonth: {
            type: [String, Number],
            value: 12
        }
    },
    lifetimes: {
        attached: function () {
            const fields = this.properties.fields;
            let value = new Date();

            if (fields === "year") {
                value = value.getFullYear().toString();
            } else if (fields === "month") {
                const year = value.getFullYear();
                const month = (value.getMonth() + 1).toString().padStart(2, '0');
                value = `${year}-${month}`;
            } else if (fields === "day") {
                value = value.toISOString().split('T')[0];
            }

            this.setData({
                value
            });

            if (this.data.type == 'sameYear') {
                this.setData({
                    startMonth1: this.data.startMonth,
                    endMonth1: this.data.endMonth,
                    year: value
                })
            }

        }
    },
    data: {
        value: new Date().toISOString().split('T')[0], // 默认值为今天，格式为 YYYY-MM-DD
        showSameYear: false,
    },
    methods: {
        onChange(e) {
            if (e.detail.value == this.data.value) return;
            this.setData({
                value: e.detail.value
            })
            this.triggerEvent("onChange", e.detail.value)
        },
        openSameYear() {
            this.setData({
                showSameYear: true
            })
        },
        onClose() {
            this.setData({
                showSameYear: false
            })
        },
        onMonthTap(e) {
            const {
                month
            } = e.currentTarget.dataset;
            const {
                startMonth1,
                endMonth1
            } = this.data;

            // 情况1：当前没有任何选中
            if (startMonth1 === null && endMonth1 === null) {
                this.setData({
                    startMonth1: month,
                    endMonth1: month
                });
            }
            // 情况2：当前只选中了一个月份（单点选择状态）
            else if (startMonth1 === endMonth1) {
                // 如果点击同一个月份，取消选中
                if (month === startMonth1) {
                    this.setData({
                        startMonth1: null,
                        endMonth1: null
                    });
                }
                // 如果点击不同月份，形成区间
                else {
                    const newStart = Math.min(startMonth1, month);
                    const newEnd = Math.max(startMonth1, month);

                    this.setData({
                        startMonth1: newStart,
                        endMonth1: newEnd
                    });
                }
            }
            // 情况3：当前已经是一个区间
            else {
                // 点击任意月份，重置为单点选择
                this.setData({
                    startMonth1: month,
                    endMonth1: month
                });
            }
        },
        onYear(e) {
            this.setData({
                year: e.detail.value
            })
        },
        onConfirm() {
            const {
                startMonth1,
                endMonth1,
                year
            } = this.data;
            if (!year) {
                wx.showModal({
                    title: '提示',
                    content: '请选择年份',
                    showCancel: false
                })
                return;
            } else if (!startMonth1 && !endMonth1) {
                wx.showModal({
                    title: '提示',
                    content: '请选择月份范围',
                    showCancel: false
                })
                return;
            }
            this.setData({
                value: year
            })
            this.triggerEvent("onChange", {
                startMonth: startMonth1 || endMonth1,
                endMonth: endMonth1 || startMonth1,
                year
            })
        }
    }
})