// Package companion provides solar-term tips and mood helpers.
package companion

import "time"

// SolarTerm is today's life tip (not fortune).
type SolarTerm struct {
	Name string `json:"name"`
	Tip  string `json:"tip"`
	Date string `json:"date"`
}

var terms = []struct {
	Start int
	Name  string
	Tip   string
}{
	{1, "小寒", "天冷宜温补作息，少熬夜，给身心留一点缓冲。"},
	{15, "大寒", "注意保暖与情绪稳定，适合整理这一年想放下的事。"},
	{32, "立春", "万物复苏，适合定一个小而清晰的成长目标。"},
	{47, "雨水", "润物无声，试试每天记录一件让你安心的小事。"},
	{62, "惊蛰", "能量回升，适合重启被搁置的习惯，别一次做太多。"},
	{77, "春分", "昼夜均衡，留意工作与休息的平衡，沟通也留余地。"},
	{92, "清明", "适合回顾与告别，把情绪说给信任的人或写下来。"},
	{107, "谷雨", "播种季，把计划拆成可完成的一步即可。"},
	{122, "立夏", "心气易浮，留出安静时段，喝水、慢走都有帮助。"},
	{137, "小满", "不必求满，进度到八成就值得肯定自己。"},
	{152, "芒种", "忙碌中记得停一下，问自己：此刻最需要什么？"},
	{167, "夏至", "白昼最长，保护睡眠，午后可短暂休息恢复专注。"},
	{183, "小暑", "炎热易烦躁，沟通前先降温自己的情绪。"},
	{198, "大暑", "宜清淡饮食与适度运动，别用透支换效率。"},
	{213, "立秋", "开始收敛节奏，复盘上半年，调整下阶段重心。"},
	{228, "处暑", "暑气渐消，适合温和地恢复规律作息。"},
	{243, "白露", "早晚温差大，关照身体的同时关照情绪波动。"},
	{258, "秋分", "又一次平衡点，整理关系与边界，轻装前行。"},
	{273, "寒露", "宜保暖与内观，少责备自己，多一点耐心。"},
	{288, "霜降", "适合沉淀，读一点喜欢的内容，给心灵加温。"},
	{303, "立冬", "进入收藏季，减少无效社交消耗，守护精力。"},
	{318, "小雪", "天寒宜静，可用书写梳理焦虑与期待。"},
	{333, "大雪", "慢下来也是前进，允许自己休息而不内疚。"},
	{348, "冬至", "一阳初生，适合与亲近的人连结，表达感谢。"},
}

// TodaySolar returns approximate solar term by day-of-year (not ephemeris).
func TodaySolar(now time.Time) SolarTerm {
	doy := now.YearDay()
	cur := terms[0]
	for _, t := range terms {
		if doy >= t.Start {
			cur = t
		}
	}
	return SolarTerm{
		Name: cur.Name,
		Tip:  cur.Tip,
		Date: now.Format("2006-01-02"),
	}
}