// Package portrait builds deterministic personal-portrait content from birth date.
// Copy follows .ai/product/lexicon.md — exploration / analysis, not fortune-telling.
package portrait

import (
	"fmt"
	"time"
)

// Output is free summary + gated detail for a GrowthReport.
type Output struct {
	Summary map[string]any `json:"summary"`
	Detail  map[string]any `json:"detail"`
}

// Build generates 个人画像 content from a birth date (deterministic).
func Build(birth time.Time, displayName string) Output {
	y, m, d := birth.Date()
	num := reduce(y) + reduce(int(m)) + reduce(d)
	for num > 9 {
		num = reduce(num)
	}
	trait := traits[num%len(traits)]
	name := displayName
	if name == "" {
		name = "你"
	}

	summary := map[string]any{
		"title":       "基础画像",
		"headline":    fmt.Sprintf("%s更偏「%s」的互动风格", name, trait.Label),
		"keywords":    trait.Keywords,
		"one_liner":   trait.OneLiner,
		"life_tip":    trait.LifeTip,
		"pattern_key": num,
	}
	detail := map[string]any{
		"title":            "完整分析",
		"behavior_pattern": trait.Behavior,
		"relation_style":   trait.Relation,
		"growth_direction": trait.Growth,
		"daily_suggestions": []string{
			trait.LifeTip,
			"遇到分歧时，先复述对方观点再表达自己的需要。",
			"用一周记录情绪与精力高峰，找到更适合自己的节奏。",
		},
	}
	return Output{Summary: summary, Detail: detail}
}

type trait struct {
	Label    string
	Keywords []string
	OneLiner string
	LifeTip  string
	Behavior string
	Relation string
	Growth   string
}

var traits = []trait{
	{
		Label: "稳健探索", Keywords: []string{"条理", "耐心", "观察"},
		OneLiner: "你习惯先理解再行动，适合把复杂事情拆成小步。",
		LifeTip:  "今天给自己一段不被打断的专注时间。",
		Behavior: "决策偏审慎，信息充分时执行力更强；压力下可能拖延。",
		Relation: "更愿意用行动表达关心，需要对方给予明确反馈。",
		Growth:   "练习在信息不完整时做小步试验，积累行动信心。",
	},
	{
		Label: "热情连接", Keywords: []string{"表达", "共鸣", "主动"},
		OneLiner: "你容易带动气氛，也需要被真诚回应。",
		LifeTip:  "把想说的话写下来，再选择合适的时机分享。",
		Behavior: "行动快、反馈敏感；情绪起伏会影响专注时长。",
		Relation: "重视即时沟通，冷处理容易让你感到不安。",
		Growth:   "学会区分「被回应」与「被认同」，减少过度解读。",
	},
	{
		Label: "理性澄清", Keywords: []string{"分析", "边界", "清晰"},
		OneLiner: "你擅长把模糊感受变成可讨论的问题。",
		LifeTip:  "睡前做一次简短复盘：今天最有价值的一件事是什么。",
		Behavior: "偏好逻辑框架；在情绪场域可能显得抽离。",
		Relation: "沟通时需要结构和具体例子，忌空泛安慰。",
		Growth:   "在分析之外，练习先接纳情绪再谈方案。",
	},
	{
		Label: "柔韧调节", Keywords: []string{"适应", "体察", "平衡"},
		OneLiner: "你善于照顾氛围，也别忘了照顾自己的节奏。",
		LifeTip:  "安排一次轻度活动，帮助身心回到平稳状态。",
		Behavior: "弹性强，容易迁就；长期可能积压需求。",
		Relation: "更在意关系和谐，冲突时倾向先安抚场面。",
		Growth:   "练习用「我需要…」表达边界，而不是只做协调者。",
	},
	{
		Label: "目标推进", Keywords: []string{"决断", "效率", "成果"},
		OneLiner: "你推动事情落地的能力突出，记得留白给休息。",
		LifeTip:  "把今日目标收束到一件最重要的事。",
		Behavior: "结果导向，节奏偏快；对低效协作耐心有限。",
		Relation: "欣赏直接沟通的人，含糊表态会消耗信任。",
		Growth:   "把「效率」与「关系维护」列为同等优先级的周目标。",
	},
	{
		Label: "内观沉淀", Keywords: []string{"深度", "独立", "洞察"},
		OneLiner: "你习惯向内理解世界，适合深度思考类任务。",
		LifeTip:  "留出安静独处时间，整理近期的想法与感受。",
		Behavior: "思考深入，对外表达可能滞后于内心结论。",
		Relation: "需要安全感和节奏感，突然施压会让你退回内在。",
		Growth:   "把洞察翻译成可分享的语言，让重要的人跟上你。",
	},
	{
		Label: "创意发散", Keywords: []string{"想象", "灵感", "可能"},
		OneLiner: "你容易看到多种可能性，适合用原型验证想法。",
		LifeTip:  "用纸笔画出今天最想尝试的一个小实验。",
		Behavior: "点子多、切换快；收尾与复盘是短板。",
		Relation: "喜欢有趣的对话，重复与僵化会让你疏离。",
		Growth:   "为每个灵感设定「最小完成定义」，提高闭环率。",
	},
	{
		Label: "责任担当", Keywords: []string{"可靠", "承诺", "稳定"},
		OneLiner: "你重视承诺与秩序，是团队里让人安心的存在。",
		LifeTip:  "检查一下是否把别人的期待误当成自己的必须。",
		Behavior: "可靠且自律；过度负责时容易耗竭。",
		Relation: "用持续在场表达在乎，需要被看见付出。",
		Growth:   "练习委托与求助，让支持系统真正运转起来。",
	},
	{
		Label: "敏锐觉察", Keywords: []string{"细腻", "直觉", "体贴"},
		OneLiner: "你对情绪与细节敏感，适合需要同理的场景。",
		LifeTip:  "觉察身体信号：紧张时先放慢呼吸再回应。",
		Behavior: "感知力强；信息过载时容易内耗。",
		Relation: "能很快读到对方状态，也易被情绪感染。",
		Growth:   "建立「感受—事实—选择」三步，减少被情绪牵着走。",
	},
}

func reduce(n int) int {
	if n < 0 {
		n = -n
	}
	sum := 0
	for n > 0 {
		sum += n % 10
		n /= 10
	}
	return sum
}