package metadata

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"
)

func newTMDB(t *testing.T, url string) *TMDB {
	t.Helper()
	c, err := NewTMDB(TMDBConfig{APIKey: "k", BaseURL: url})
	if err != nil {
		t.Fatalf("NewTMDB: %v", err)
	}
	return c
}

func TestTMDB_SearchMovie(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/search/movie" {
			t.Errorf("path = %q", r.URL.Path)
		}
		q := r.URL.Query()
		if q.Get("api_key") != "k" || q.Get("query") != "The Matrix" || q.Get("year") != "1999" {
			t.Errorf("query = %v", q)
		}
		_, _ = w.Write([]byte(`{"results":[
			{"id":603,"title":"The Matrix","original_title":"The Matrix","release_date":"1999-03-31"}
		]}`))
	}))
	defer srv.Close()

	got, err := newTMDB(t, srv.URL).Search(context.Background(), Query{Type: Movie, Title: "The Matrix", Year: 1999})
	if err != nil {
		t.Fatalf("Search: %v", err)
	}
	if len(got) != 1 {
		t.Fatalf("got %d candidates", len(got))
	}
	c := got[0]
	if c.Provider != "tmdb" || c.ID != "603" || c.Title != "The Matrix" || c.Year != 1999 {
		t.Errorf("candidate = %+v", c)
	}
}

func TestTMDB_SearchSeries(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/search/tv" {
			t.Errorf("path = %q", r.URL.Path)
		}
		if r.URL.Query().Get("first_air_date_year") != "2015" {
			t.Errorf("year param = %q", r.URL.Query().Get("first_air_date_year"))
		}
		_, _ = w.Write([]byte(`{"results":[
			{"id":60622,"name":"Fargo","original_name":"Fargo","first_air_date":"2014-04-15"}
		]}`))
	}))
	defer srv.Close()

	got, err := newTMDB(t, srv.URL).Search(context.Background(), Query{Type: Series, Title: "Fargo", Year: 2015})
	if err != nil {
		t.Fatalf("Search: %v", err)
	}
	if len(got) != 1 || got[0].ID != "60622" || got[0].Title != "Fargo" || got[0].Year != 2014 {
		t.Errorf("candidate = %+v", got[0])
	}
}

func TestTMDB_SeasonEpisodeCounts(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/tv/60622" {
			t.Errorf("path = %q", r.URL.Path)
		}
		_, _ = w.Write([]byte(`{"seasons":[
			{"season_number":0,"episode_count":2},
			{"season_number":1,"episode_count":10},
			{"season_number":2,"episode_count":10}
		]}`))
	}))
	defer srv.Close()

	counts, err := newTMDB(t, srv.URL).SeasonEpisodeCounts(context.Background(), "60622")
	if err != nil {
		t.Fatalf("SeasonEpisodeCounts: %v", err)
	}
	if counts[1] != 10 || counts[2] != 10 || counts[0] != 2 {
		t.Errorf("counts = %v", counts)
	}
}

func TestTMDB_ErrorStatus(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusUnauthorized)
		_, _ = w.Write([]byte(`{"status_message":"invalid key"}`))
	}))
	defer srv.Close()

	_, err := newTMDB(t, srv.URL).Search(context.Background(), Query{Type: Movie, Title: "X"})
	if err == nil {
		t.Fatal("want error on 401")
	}
}

func TestNewTMDB_RequiresKey(t *testing.T) {
	if _, err := NewTMDB(TMDBConfig{}); err == nil {
		t.Fatal("want error without api_key")
	}
}