package beatport

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"streamrip-go/internal/config"
)

func newTestClient(t *testing.T, handler http.Handler) (*Client, func()) {
	t.Helper()
	ts := httptest.NewServer(handler)
	cfg := &config.Config{Session: config.DefaultConfigData(), File: config.DefaultConfigData()}
	cfg.Session.Beatport.Username = "user"
	cfg.Session.Beatport.Password = "pass"
	cfg.Session.Beatport.AccessToken = "token"
	cfg.Session.Beatport.TokenExpiry = time.Now().Add(time.Hour).Unix()
	c := New(cfg)
	c.baseURL = ts.URL
	c.http = ts.Client()
	c.loggedIn = true
	return c, ts.Close
}

func writeJSON(t *testing.T, w http.ResponseWriter, v any) {
	t.Helper()
	w.Header().Set("Content-Type", "application/json")
	if err := json.NewEncoder(w).Encode(v); err != nil {
		t.Fatalf("encode json: %v", err)
	}
}

func TestGetDownloadableMapsQuality(t *testing.T) {
	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/catalog/tracks/42/download/" {
			t.Fatalf("path = %q", r.URL.Path)
		}
		if got := r.URL.Query().Get("quality"); got != "high" {
			t.Fatalf("quality = %q, want high", got)
		}
		writeJSON(t, w, map[string]any{"location": "https://cdn.example/42.m4a", "stream_quality": ".256k.aac.mp4"})
	}))
	defer closeServer()

	d, err := c.GetDownloadable(context.Background(), "42", 2)
	if err != nil {
		t.Fatalf("GetDownloadable() error = %v", err)
	}
	if d.URL != "https://cdn.example/42.m4a" || d.Extension != "m4a" || d.Audio.BitrateKbps != 256 || d.Audio.Quality != "HIGH" {
		t.Fatalf("unexpected downloadable: %+v", d)
	}
}

func TestAlbumMetadataNormalizesReleaseTracks(t *testing.T) {
	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/catalog/releases/7/":
			writeJSON(t, w, map[string]any{
				"id":               7,
				"name":             "Release Name",
				"new_release_date": "2024-01-02",
				"track_count":      1,
				"artists":          []any{map[string]any{"id": 10, "name": "Album Artist"}},
				"image":            map[string]any{"dynamic_uri": "https://img.example/{w}x{h}.jpg"},
			})
		case "/catalog/releases/7/tracks/":
			writeJSON(t, w, map[string]any{
				"next": nil,
				"results": []any{map[string]any{
					"id":       42,
					"name":     "Track Name",
					"mix_name": "Original Mix",
					"number":   1,
					"artists":  []any{map[string]any{"id": 11, "name": "Track Artist"}},
					"genre":    map[string]any{"name": "House"},
					"isrc":     "USABC1234567",
				}},
			})
		default:
			t.Fatalf("unexpected path %q", r.URL.Path)
		}
	}))
	defer closeServer()

	meta, err := c.GetMetadata(context.Background(), "7", "album")
	if err != nil {
		t.Fatalf("GetMetadata() error = %v", err)
	}
	if meta["title"] != "Release Name" || meta["release_date_original"] != "2024-01-02" {
		t.Fatalf("unexpected album meta: %+v", meta)
	}
	tracks := meta["tracks"].(map[string]any)["items"].([]any)
	if len(tracks) != 1 {
		t.Fatalf("tracks len = %d", len(tracks))
	}
	track := tracks[0].(map[string]any)
	if track["id"] != "42" || track["title"] != "Track Name" || track["version"] != "Original Mix" {
		t.Fatalf("unexpected track meta: %+v", track)
	}
	album := track["album"].(map[string]any)
	if album["title"] != "Release Name" {
		t.Fatalf("unexpected track album: %+v", album)
	}
}

func TestAlbumMetadataCollapsesManyReleaseArtists(t *testing.T) {
	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/catalog/releases/7/":
			writeJSON(t, w, map[string]any{
				"id":          7,
				"name":        "Compilation",
				"track_count": 1,
				"artists": []any{
					map[string]any{"id": 1, "name": "A"},
					map[string]any{"id": 2, "name": "B"},
					map[string]any{"id": 3, "name": "C"},
					map[string]any{"id": 4, "name": "D"},
				},
			})
		case "/catalog/releases/7/tracks/":
			writeJSON(t, w, map[string]any{
				"next": nil,
				"results": []any{map[string]any{
					"id":      42,
					"name":    "Track Name",
					"number":  1,
					"artists": []any{map[string]any{"id": 1, "name": "A"}},
				}},
			})
		default:
			t.Fatalf("unexpected path %q", r.URL.Path)
		}
	}))
	defer closeServer()

	meta, err := c.GetMetadata(context.Background(), "7", "album")
	if err != nil {
		t.Fatalf("GetMetadata() error = %v", err)
	}
	artist := meta["artist"].(map[string]any)
	if artist["name"] != "Various Artists" {
		t.Fatalf("album artist = %q, want Various Artists", artist["name"])
	}
	track := meta["tracks"].(map[string]any)["items"].([]any)[0].(map[string]any)
	album := track["album"].(map[string]any)
	albumArtist := album["artist"].(map[string]any)
	if albumArtist["name"] != "Various Artists" {
		t.Fatalf("track album artist = %q, want Various Artists", albumArtist["name"])
	}
}

func TestReleaseArtistCollapseCanBeDisabled(t *testing.T) {
	cfg := &config.Config{Session: config.DefaultConfigData(), File: config.DefaultConfigData()}
	cfg.Session.Beatport.VariousArtistsThreshold = -1
	c := New(cfg)
	got := c.releaseArtistName([]any{
		map[string]any{"name": "A"},
		map[string]any{"name": "B"},
		map[string]any{"name": "C"},
		map[string]any{"name": "D"},
	})
	if got != "A, B, C, D" {
		t.Fatalf("releaseArtistName() = %q", got)
	}
}

func TestArtistMetadataUsesReleases(t *testing.T) {
	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/catalog/artists/908468/":
			writeJSON(t, w, map[string]any{"id": 908468, "name": "D'ort"})
		case "/catalog/releases/":
			if got := r.URL.Query().Get("artist_id"); got != "908468" {
				t.Fatalf("artist_id = %q", got)
			}
			writeJSON(t, w, map[string]any{
				"next": nil,
				"results": []any{map[string]any{
					"id":               123,
					"name":             "An Artisan's Exhibition",
					"new_release_date": "2026-01-01",
					"track_count":      10,
					"artists":          []any{map[string]any{"id": 908468, "name": "D'ort"}},
				}},
			})
		default:
			t.Fatalf("unexpected path %q", r.URL.Path)
		}
	}))
	defer closeServer()

	meta, err := c.GetMetadata(context.Background(), "908468", "artist")
	if err != nil {
		t.Fatalf("GetMetadata() error = %v", err)
	}
	if meta["name"] != "D'ort" {
		t.Fatalf("artist name = %q", meta["name"])
	}
	albums := meta["albums"].(map[string]any)["items"].([]any)
	if len(albums) != 1 {
		t.Fatalf("albums len = %d", len(albums))
	}
	album := albums[0].(map[string]any)
	if album["id"] != "123" || album["title"] != "An Artisan's Exhibition" || album["tracks_count"] != 10 {
		t.Fatalf("unexpected album: %+v", album)
	}
}