// Package rhythm builds 身心节律 reports (lifestyle exploration, not fortune/medical claims).
package rhythm

import (
	"fmt"
	"time"

	"github.com/yuxingu/digital-psychology/apps/api/internal/companion"
	"github.com/yuxingu/digital-psychology/apps/api/internal/portrait"
)

// Output free summary + gated detail.
type Output struct {
	Summary map[string]any
	Detail  map[string]any
}

var elements = []string{"木", "火", "土", "金", "水"}

// Build from birth date (asOf = now).
func Build(birth time.Time, displayName string) Output {
	return BuildWith(birth, displayName, time.Time{})
}

// BuildWith anchors today/week tips to asOf (zero = now CST).
func BuildWith(birth time.Time, displayName string, asOf time.Time) Output {
	name := displayName
	if name == "" {
		name = "你"
	}
	primary := elements[(birth.Year()+int(birth.Month())+birth.Day())%5]
	secondary := elements[(birth.YearDay())%5]
	if secondary == primary {
		secondary = elements[(birth.YearDay()+1)%5]
	}
	tip := tips[primary]

	dims := []map[string]any{
		{"key": "element", "title": "主导倾向", "teaser": fmt.Sprintf("更偏「%s」隐喻", primary), "score": 80},
		{"key": "balance", "title": "平衡关注", "teaser": fmt.Sprintf("可留意「%s」侧滋养", secondary), "score": 68},
		{"key": "sleep", "title": "作息", "teaser": tip.Sleep, "score": 72},
		{"key": "diet", "title": "饮食节奏", "teaser": tip.Diet, "score": 70},
		{"key": "move", "title": "活动", "teaser": tip.Move, "score": 74},
		{"key": "mood", "title": "情绪调节", "teaser": tip.Mood, "score": 71},
	}

	when := asOf
	if when.IsZero() {
		when = time.Now().In(time.FixedZone("CST", 8*3600))
	} else {
		when = when.In(time.FixedZone("CST", 8*3600))
	}
	todayTips := []string{tip.Sleep, tip.Diet, tip.Move, tip.Mood}
	todayTip := todayTips[when.YearDay()%len(todayTips)]
	weekday := int(when.Weekday())
	weekHints := []string{tip.Mood, tip.Move, tip.Diet, tip.Sleep, tip.WeekTip, tip.Move, tip.Mood}
	dayKey := when.Format("2006-01-02")
	validUntil := time.Date(when.Year(), when.Month(), when.Day()+1, 0, 0, 0, 0, when.Location())
	wx := portrait.WuxingBlock(birth)
	st := companion.TodaySolar(when)
	summary := map[string]any{
		"title":       "身心节律·基础",
		"style_label": primary + "倾向",
		"headline":    fmt.Sprintf("%s的身心节律更偏「%s」隐喻", name, primary),
		"one_liner":   tip.OneLiner,
		"overview":    fmt.Sprintf("%s%s主导倾向「%s」，辅助关注「%s」。以下建议用于生活节奏探索，不构成医疗意见。", name, tip.Overview, primary, secondary),
		"life_tip":    tip.WeekTip,
		"today_tip":   todayTip,
		"week_focus":  weekHints[weekday%len(weekHints)],
		"as_of":       dayKey,
		"valid_until": validUntil.Format(time.RFC3339),
		"wuxing":      wx,
		"solar_term": map[string]any{
			"name": st.Name,
			"tip":  st.Tip,
		},
		"keywords":            []string{primary, secondary, "生活建议", "节律"},
		"dimensions":          dims,
		"primary_element":     primary,
		"secondary_element":   secondary,
		"strengths_preview":   tip.Strengths[:min(3, len(tip.Strengths))],
		"blind_spots_preview": tip.BlindSpots[:min(3, len(tip.BlindSpots))],
		"disclaimer_constitution": "体质与调养内容为生活方式参考，非医疗建议。",
	}

	detail := map[string]any{
		"title": "身心节律·完整建议",
		"sections": []map[string]any{
			{"title": "节律总览", "body": tip.DeepOverview, "bullets": tip.OverviewBullets},
			{"title": "作息建议", "body": tip.SleepDeep, "bullets": tip.SleepBullets},
			{"title": "饮食节奏", "body": tip.DietDeep, "bullets": tip.DietBullets},
			{"title": "活动与放松", "body": tip.MoveDeep, "bullets": tip.MoveBullets},
			{"title": "情绪与压力", "body": tip.MoodDeep, "bullets": tip.MoodBullets},
			{"title": "与节气联动", "body": "可结合「节气生活」调整当季节奏；变化慢一点，观察身体反馈即可。", "bullets": []string{"查看今日节气", "一次只改一个习惯", "不适就医，勿自行当治疗"}},
			{"title": "今日生活建议", "body": todayTip + " " + tip.Mood, "bullets": []string{tip.Move, tip.Diet}},
			{"title": "本周节奏", "body": weekHints[weekday%len(weekHints)], "bullets": tip.OverviewBullets},
		},
		"strengths":   tip.Strengths,
		"blind_spots": tip.BlindSpots,
		"growth_plan": []map[string]any{
			{"phase": "本周", "focus": tip.WeekTip},
			{"phase": "本月", "focus": tip.MonthTip},
			{"phase": "长期", "focus": "形成「充电/耗电」清单，并与节气提醒一起复盘。"},
		},
		"conversation_scripts": tip.Scripts,
		"faq": []map[string]string{
			{"q": "这是占卜或看病吗？", "a": "都不是。这是身心节律的自我探索与生活建议，不预测未来，也不构成医疗诊断。"},
		},
		"behavior_pattern": tip.DeepOverview,
		"relation_style":   tip.MoodDeep,
		"growth_direction": tip.MonthTip,
	}
	return Output{Summary: summary, Detail: detail}
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

type tipPack struct {
	OneLiner, Overview, WeekTip, MonthTip, DeepOverview string
	Sleep, Diet, Move, Mood                             string
	SleepDeep, DietDeep, MoveDeep, MoodDeep             string
	OverviewBullets, SleepBullets, DietBullets, MoveBullets, MoodBullets []string
	Strengths, BlindSpots, Scripts                      []string
}

var tips = map[string]tipPack{
	"木": {
		OneLiner: "你适合有伸展与目标感的节奏，压得太死容易闷。",
		Overview: "在节律隐喻里偏「生发」：需要空间与方向。",
		WeekTip:  "本周安排三次户外或拉伸，每次 15 分钟。",
		MonthTip: "给自己一个可完成的小目标，并拆成周检查点。",
		DeepOverview: "木倾向的人常需要「向前」的感觉。卡住时，动一动比硬想更有效。注意肩颈与情绪积压。",
		Sleep: "尽量固定入睡窗口", Diet: "清淡多样，少暴饮暴食", Move: "伸展、快走、轻度有氧", Mood: "把烦闷说出来或写下来",
		SleepDeep: "规律睡眠能显著降低烦躁。睡前一小时减少争执性内容。",
		DietDeep: "少油炸重味，增加新鲜蔬菜；饥一顿饱一顿会放大情绪波动。",
		MoveDeep: "优先选择有伸展感的活动，避免长期久坐。",
		MoodDeep: "愤怒或闷气是常见信号。命名情绪后做一次短活动再对话。",
		OverviewBullets: []string{"需要方向感", "忌长期压抑", "动一动有助疏通"},
		SleepBullets:    []string{"固定入睡", "睡前减刺激"},
		DietBullets:     []string{"清淡多样", "规律进餐"},
		MoveBullets:     []string{"伸展快走", "避免久坐"},
		MoodBullets:     []string{"命名情绪", "先活动再谈"},
		Strengths:       []string{"行动欲", "目标感", "适应生长"},
		BlindSpots:      []string{"易急躁", "压怒", "忽视休息"},
		Scripts:         []string{"我有点闷，想先走走再聊。", "我需要一个小目标来找到节奏。"},
	},
	"火": {
		OneLiner: "你靠热情与连接充电，也要注意过热后的回落。",
		Overview: "节律隐喻偏「温煦」：表达与互动重要。",
		WeekTip:  "保证两晚 23:30 前入睡，并安排一次轻松社交。",
		MonthTip: "学会在热情后安排恢复日，而不是连续硬冲。",
		DeepOverview: "火倾向的人能量外放。高潮后空虚很常见，回落期做轻松恢复即可。",
		Sleep: "避免熬夜透支", Diet: "少辛辣刺激过量", Move: "有节奏的有氧", Mood: "表达后也要倾听",
		SleepDeep: "睡眠差会放大冲动。把「今晚早睡」当成任务完成。",
		DietDeep: "辛辣咖啡适量；补水与规律三餐稳住节奏。",
		MoveDeep: "运动有助释放兴奋，但避免以透支换快乐。",
		MoodDeep: "表达是优点。记得给对方回应空间，也给自己降温时间。",
		OverviewBullets: []string{"热情连接", "注意回落", "表达重要"},
		SleepBullets:    []string{"少熬夜", "降温再睡"},
		DietBullets:     []string{"刺激适量", "规律进餐"},
		MoveBullets:     []string{"有氧释放", "勿透支"},
		MoodBullets:     []string{"表达+倾听", "回落期恢复"},
		Strengths:       []string{"感染力", "行动号召", "乐观"},
		BlindSpots:      []string{"过热", "承诺过多", "忽视恢复"},
		Scripts:         []string{"我很兴奋，我们先定本周唯一下一步。", "我需要今晚早点休息。"},
	},
	"土": {
		OneLiner: "你需要稳定与踏实，变化太快会消耗安全感。",
		Overview: "节律隐喻偏「承载」：规律比刺激更重要。",
		WeekTip:  "固定三餐时间，并完成一次环境整理（桌面/房间一角）。",
		MonthTip: "建立一个可重复的晨间或睡前小仪式。",
		DeepOverview: "土倾向的人靠可预期感充电。突变多时，用清单与仪式稳住自己。",
		Sleep: "同一时间上床", Diet: "温热易消化、勿过饥过饱", Move: "散步、力量轻度", Mood: "少同时处理多件事",
		SleepDeep: "规律比时长更重要。周末也不要大幅颠倒作息。",
		DietDeep: "细嚼慢咽；减少生冷刺激性饮食实验。",
		MoveDeep: "稳定、可坚持的运动优于偶尔高强度。",
		MoodDeep: "焦虑常来自失控感。把任务拆小，完成一件勾一项。",
		OverviewBullets: []string{"需要稳定", "仪式感有用", "忌突变过多"},
		SleepBullets:    []string{"同时上床", "周末少颠倒"},
		DietBullets:     []string{"规律温热", "细嚼"},
		MoveBullets:     []string{"可坚持", "散步力量"},
		MoodBullets:     []string{"清单拆解", "单线程"},
		Strengths:       []string{"踏实", "耐心", "可靠"},
		BlindSpots:      []string{"抗拒变化", "过度担忧", "行动偏慢"},
		Scripts:         []string{"我想先把节奏排好，再谈变化。", "给我一点准备时间，我会更稳。"},
	},
	"金": {
		OneLiner: "你重视秩序与边界，混乱环境会让你烦躁。",
		Overview: "节律隐喻偏「收敛」：清晰与整理很重要。",
		WeekTip:  "清理数字或实体杂物 20 分钟，并写下三条边界。",
		MonthTip: "练习两次温和而清晰的拒绝。",
		DeepOverview: "金倾向的人靠清晰边界获得掌控感。过度苛求完美会消耗自己。",
		Sleep: "睡前收工仪式", Diet: "少熬夜夜宵", Move: "呼吸、拉伸、节奏运动", Mood: "把标准调到足够好",
		SleepDeep: "工作与睡眠边界要划清；床上不处理未完成清单。",
		DietDeep: "规律饮食；减少以咖啡硬撑。",
		MoveDeep: "注重呼吸与肩颈；短时高质量运动即可。",
		MoodDeep: "挑剔有时是焦虑。用「足够好」完成一件事对抗空转。",
		OverviewBullets: []string{"边界清晰", "忌混乱", "完美主义留意"},
		SleepBullets:    []string{"收工仪式", "床上不工作"},
		DietBullets:     []string{"少硬撑", "规律"},
		MoveBullets:     []string{"呼吸拉伸", "短时有效"},
		MoodBullets:     []string{"足够好", "温和拒绝"},
		Strengths:       []string{"条理", "原则", "质量感"},
		BlindSpots:      []string{"过苛", "难放手", "紧绷"},
		Scripts:         []string{"这次我想按我的节奏来。", "这件事我接不住，我们换个方案。"},
	},
	"水": {
		OneLiner: "你感受深、需要沉淀，被催促时容易关闭。",
		Overview: "节律隐喻偏「滋润」：休整与感受空间重要。",
		WeekTip:  "安排两段不被打扰的静默时间（各 20 分钟）。",
		MonthTip: "建立睡前放松流程，减少临睡刷信息。",
		DeepOverview: "水倾向的人需要内在空间。催促与过载会让你退缩；适度分享感受可减少误解。",
		Sleep: "保证连续睡眠", Diet: "温补平和、少冰冷刺激", Move: "游泳、散步、柔软活动", Mood: "先感受再决策",
		SleepDeep: "睡眠是情绪水库。缺觉时少做重大决定。",
		DietDeep: "规律温热；观察哪些食物让你更稳。",
		MoveDeep: "柔和持续的活动比爆发冲刺更适合你。",
		MoodDeep: "情绪来时先命名；写三句或找安全的人听你说完。",
		OverviewBullets: []string{"需要沉淀", "忌强催", "感受力强"},
		SleepBullets:    []string{"连续睡眠", "少缺觉决策"},
		DietBullets:     []string{"温热平和", "规律"},
		MoveBullets:     []string{"柔和持续", "散步游泳"},
		MoodBullets:     []string{"先命名", "再决策"},
		Strengths:       []string{"洞察", "共情", "韧性"},
		BlindSpots:      []string{"回避", "反刍", "边界模糊"},
		Scripts:         []string{"我需要一点时间感受一下，再回复你。", "我不是拖延，我在整理自己。"},
	},
}