package relation

import "fmt"

type dimScore struct {
	Score  int
	Teaser string
}

func dimMap(v any) map[string]dimScore {
	out := map[string]dimScore{}
	arr, ok := v.([]map[string]any)
	if !ok {
		// Build() uses []map[string]any — also tolerate []any
		raw, ok2 := v.([]any)
		if !ok2 {
			return out
		}
		for _, item := range raw {
			m, ok := item.(map[string]any)
			if !ok {
				continue
			}
			key := str(m["key"])
			out[key] = dimScore{Score: asInt(m["score"]), Teaser: str(m["teaser"])}
		}
		return out
	}
	for _, m := range arr {
		key := str(m["key"])
		out[key] = dimScore{Score: asInt(m["score"]), Teaser: str(m["teaser"])}
	}
	return out
}

func asInt(v any) int {
	switch n := v.(type) {
	case int:
		return n
	case float64:
		return int(n)
	default:
		return 0
	}
}

func dimTitle(key string) string {
	switch key {
	case "personality":
		return "性格特点"
	case "communication":
		return "沟通方式"
	case "relation":
		return "关系模式"
	case "career":
		return "事业节奏"
	case "emotion":
		return "情绪调节"
	case "lifestyle":
		return "生活节奏"
	default:
		return key
	}
}

func dimNote(key string, gap int, aName, bName string) string {
	if gap > 12 {
		return fmt.Sprintf("在「%s」上，%s 分值更高，适合由 %s 多给结构，%s 多给弹性。", dimTitle(key), aName, aName, bName)
	}
	if gap < -12 {
		return fmt.Sprintf("在「%s」上，%s 分值更高，相处时可多尊重 %s 的节奏。", dimTitle(key), bName, bName)
	}
	return fmt.Sprintf("在「%s」上双方接近，容易形成默契，也要防止都默认对方「应该懂」。", dimTitle(key))
}

func firstTeaser(m map[string]dimScore, key string) string {
	if d, ok := m[key]; ok && d.Teaser != "" {
		return d.Teaser
	}
	return "表达方式各有节奏"
}

func harmonyIndex(dims []map[string]any) int {
	if len(dims) == 0 {
		return 72
	}
	sum := 0
	for _, d := range dims {
		gap := asInt(d["gap"])
		sum += 100 - gap*4
	}
	avg := sum / len(dims)
	if avg < 45 {
		return 45
	}
	if avg > 96 {
		return 96
	}
	return avg
}

func fitFromHarmony(score int, aLabel, bLabel string) (string, []string) {
	switch {
	case score >= 82:
		return "默契互补型", []string{
			fmt.Sprintf("%s与%s节奏接近，适合共同推进小事。", aLabel, bLabel),
			"把欣赏说出口，默契会更稳。",
			"每周留一次轻松同步，不必每次谈大事。",
		}
	case score >= 68:
		return "磨合成长型", []string{
			"差异可见，正好写成相处说明书。",
			"冲突时先复述再提方案。",
			"共同目标写清楚，减少猜忌。",
		}
	default:
		return "反差探索型", []string{
			"反差大不等于不合，关键是边界与节奏。",
			"重要约定尽量具体、可检查。",
			"给彼此独处充电的空间。",
		}
	}
}