package discourse

import (
	"context"
	"errors"
	"testing"
)

func TestSearchRequiresTerm(t *testing.T) {
	f := newFake(t)
	c := testClient(t, f)
	_, err := c.Search(context.Background(), SearchRequest{})
	if !errors.Is(err, ErrInvalidRequest) {
		t.Fatalf("want ErrInvalidRequest for empty term, got %v", err)
	}
	if f.saw("/search.json") {
		t.Fatal("no request should have been sent for an empty term")
	}
}

func TestSearchQueriesAndParses(t *testing.T) {
	f := newFake(t)
	c := testClient(t, f)
	res, err := c.Search(context.Background(), SearchRequest{Term: "fleet briefing"})
	if err != nil {
		t.Fatalf("Search: %v", err)
	}
	if !f.sawQuery("/search.json", "term=fleet+briefing") {
		t.Fatal("search term not sent as the term= query parameter")
	}
	if len(res.Posts) != 1 || res.Posts[0].TopicID != 12 || res.Posts[0].Username != "reachableceo" {
		t.Fatalf("posts not parsed: %+v", res.Posts)
	}
	if res.Posts[0].Blurb == "" {
		t.Fatal("blurb not parsed")
	}
	if len(res.Topics) != 1 || res.Topics[0].Title != "Fleet briefing 2026-09-01" {
		t.Fatalf("topics not parsed: %+v", res.Topics)
	}
	if len(res.Users) != 1 || res.Users[0].Username != "reachableceo" {
		t.Fatalf("users not parsed: %+v", res.Users)
	}
	if len(res.Categories) != 1 || res.Categories[0].Slug != "mopac-briefings" {
		t.Fatalf("categories not parsed: %+v", res.Categories)
	}
}

func TestSearchEncodesTermAndPage(t *testing.T) {
	f := newFake(t)
	c := testClient(t, f)
	if _, err := c.Search(context.Background(), SearchRequest{Term: "a b&c=d", Page: 2}); err != nil {
		t.Fatalf("Search: %v", err)
	}
	if !f.sawQuery("/search.json", "term=a+b%26c%3Dd") {
		t.Fatal("term not url-encoded (a b&c=d must not smuggle extra params)")
	}
	if !f.sawQuery("/search.json", "page=2") {
		t.Fatal("page not sent as the page= query parameter")
	}
}

func TestSearchTypedErrors(t *testing.T) {
	f := newFake(t)
	c := testClient(t, f)
	f.searchFail = 403
	_, err := c.Search(context.Background(), SearchRequest{Term: "x"})
	if !errors.Is(err, ErrForbidden) {
		t.Fatalf("want ErrForbidden, got %v", err)
	}
}