package reddit_test

import (
	"context"
	"testing"
	"time"

	"somegit.dev/vikingowl/reddit-reader/internal/domain"
	redditpkg "somegit.dev/vikingowl/reddit-reader/internal/reddit"
)

type mockFetcher struct {
	posts []domain.Post
	err   error
}

func (m *mockFetcher) FetchPosts(_ context.Context, _, _ string, _ int) ([]domain.Post, error) {
	return m.posts, m.err
}

func TestFetcherInterface(t *testing.T) {
	mock := &mockFetcher{
		posts: []domain.Post{
			{ID: "t3_a", Title: "Test", Subreddit: "golang", CreatedUTC: time.Now()},
		},
	}
	var fetcher redditpkg.Fetcher = mock
	posts, err := fetcher.FetchPosts(context.Background(), "golang", "new", 25)
	if err != nil {
		t.Fatalf("FetchPosts: %v", err)
	}
	if len(posts) != 1 {
		t.Fatalf("len = %d, want 1", len(posts))
	}
	if posts[0].ID != "t3_a" {
		t.Errorf("ID = %q, want t3_a", posts[0].ID)
	}
}