package usecase

import (
	"context"
	"testing"

	"apps/backend/internal/module/scout/domain"
	"apps/backend/internal/module/scout/repository"
)

func TestTextMatchesSearchTerm(t *testing.T) {
	if !textMatchesSearchTerm("最近在找外包做 app", "外包 求推薦") {
		t.Fatal("should match 外包")
	}
	if textMatchesSearchTerm("今天天氣真好去爬山", "外包 求推薦") {
		t.Fatal("unrelated text must not match")
	}
	if !textMatchesSearchTerm("求推薦好用的保母", "保母") {
		t.Fatal("should match 保母")
	}
	// 只有「求推薦」命中、沒主題核 → 最長核是求推薦(3字) 會要求含求推薦
	if !textMatchesSearchTerm("有人求推薦嗎", "求推薦") {
		t.Fatal("exact anchor term")
	}
}

func TestPersistSearchHitsRejectsIrrelevantAPIResult(t *testing.T) {
	svc := New(repository.NewMemory())
	posts, err := svc.persistSearchHits(context.Background(), 1, &domain.RunBrief{
		Mode: domain.ModeActivity, ScanTerms: []string{"後端工程師"},
	}, domain.PathAPI, []ThreadSearchResult{
		{URL: "https://www.threads.net/@dev/post/1", Snippet: "正在找後端工程師一起做產品"},
		{URL: "https://www.threads.net/@film/post/2", Snippet: "劇組徵拍電影的夥伴"},
	})
	if err != nil {
		t.Fatalf("persistSearchHits: %v", err)
	}
	if len(posts) != 1 {
		t.Fatalf("posts=%d want 1", len(posts))
	}
	if posts[0].Permalink != "https://www.threads.net/@dev/post/1" {
		t.Fatalf("unexpected post %q", posts[0].Permalink)
	}
}

func TestPersistActivityHitsPrioritizesDiscussionMomentum(t *testing.T) {
	svc := New(repository.NewMemory())
	posts, err := svc.persistSearchHits(context.Background(), 1, &domain.RunBrief{
		Mode: domain.ModeActivity, ScanTerms: []string{"外包"},
	}, domain.PathAPI, []ThreadSearchResult{
		{URL: "https://www.threads.net/@chat/post/1", Snippet: "分享外包合作的心得", PublishedAt: 200},
		{URL: "https://www.threads.net/@ask/post/2", Snippet: "請問外包工程師怎麼找？", PublishedAt: 100},
	})
	if err != nil {
		t.Fatalf("persistSearchHits: %v", err)
	}
	if len(posts) != 2 {
		t.Fatalf("posts=%d want 2", len(posts))
	}
	if posts[0].Permalink != "https://www.threads.net/@ask/post/2" {
		t.Fatalf("first post=%q want asking post", posts[0].Permalink)
	}
}