package placement

import "testing"

func TestResearchMapTopicLabel(t *testing.T) {
	if got := ResearchMapTopicLabel("品牌A", "敏感肌換季"); got != "敏感肌換季" {
		t.Fatalf("got %q", got)
	}
	if got := ResearchMapTopicLabel("品牌A", ""); got != "品牌A" {
		t.Fatalf("got %q", got)
	}
}

func TestResearchMapTooThin(t *testing.T) {
	thin := ResearchMap{
		AudienceSummary: "太短",
		ContentGoal:     "目標",
		Questions:       []string{"q1"},
		Pillars:         []string{"p1"},
		Exclusions:      []string{"e1"},
	}
	if !ResearchMapTooThin(thin) {
		t.Fatal("expected thin map")
	}
	rich := ResearchMap{
		AudienceSummary: "這是一群在換季時因為敏感肌而臉頰泛紅刺痛、正在 Threads 上求助保養方式的年輕上班族，他們常因換產品或壓力而惡化，洗澡後更癢更紅，因此積極尋找溫和無香精、有第三方認證的修護產品。",
		ContentGoal:     "找出「近期發文（理想 3 天內）」、作者本身有敏感肌舒緩困擾、有明確換修護產品需求、現在留言區自然推薦目標修護乳液還來得及且不突兀的貼文。",
		Questions:       []string{"1", "2", "3", "4", "5", "6", "7", "8"},
		Pillars:         []string{"1", "2", "3", "4", "5", "6"},
		Exclusions:      []string{"1", "2", "3", "4", "5", "6", "7", "8"},
	}
	if ResearchMapTooThin(rich) {
		t.Fatal("expected rich map")
	}
}

func TestFilterTimeExclusions(t *testing.T) {
	items := []string{
		"純曬照、純分享日常生活的貼文",
		"過舊或非近期發文的貼文",
		"推廣其他品牌沐浴乳或業配他牌的貼文",
	}
	got := filterTimeExclusions(items)
	if len(got) != 2 {
		t.Fatalf("got %d items: %v", len(got), got)
	}
}

func TestBuildResearchMapSystemPromptHasSearchGuidance(t *testing.T) {
	prompt := BuildResearchMapSystemPrompt()
	for _, want := range []string{
		"questions", "pillars", "exclusions", "patrolKeywords", "Threads", "寧可詳盡",
		"ecostore 抗敏無香沐浴露", "化療後皮膚敏感要換什麼沐浴乳",
		"工作流程", "前置分析", "禁止寫時間相關條件",
	} {
		if !contains(prompt, want) {
			t.Fatalf("prompt missing %q", want)
		}
	}
}

func contains(s, sub string) bool {
	return len(s) >= len(sub) && (s == sub || len(sub) == 0 || indexOf(s, sub) >= 0)
}

func indexOf(s, sub string) int {
	for i := 0; i+len(sub) <= len(s); i++ {
		if s[i:i+len(sub)] == sub {
			return i
		}
	}
	return -1
}