package ynison

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

	"gitea.mrixs.me/Mrixs/yandex-music-api-go/internal/client"
	"gitea.mrixs.me/Mrixs/yandex-music-api-go/internal/ynison/proto"
	"github.com/gorilla/websocket"
)

// TestYnisonClient_Connect tests the Connect method with a mock WebSocket server
func TestYnisonClient_Connect(t *testing.T) {
	// Create a mock WebSocket server
	var receivedMessages [][]byte
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		upgrader := websocket.Upgrader{
			CheckOrigin: func(r *http.Request) bool { return true },
		}
		conn, err := upgrader.Upgrade(w, r, nil)
		if err != nil {
			t.Logf("Upgrade error: %v", err)
			return
		}
		defer conn.Close()

		// Read messages from client
		for {
			_, message, err := conn.ReadMessage()
			if err != nil {
				if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
					t.Logf("Read error: %v", err)
				}
				return
			}
			receivedMessages = append(receivedMessages, message)
		}
	}))
	defer server.Close()

	// Convert HTTP URL to WS URL
	wsURL := "ws" + server.URL[4:] // Replace http with ws

	// Create a client with test token
	c := client.NewClient(client.ClientConfig{
		Token: "test-token",
	})

	config := DeviceConfig{
		DeviceID:    "test-device-123",
		Title:       "Test Device",
		DeviceType:  proto.DeviceType_DEVICE_TYPE_WEB_DESKTOP,
		AppName:     "TestApp",
		AppVersion:  "1.0.0",
		CanBePlayer: true,
		CanBeRemote: true,
		VolumeGran:  100,
	}

	ynisonClient := NewYnisonClient(c, config)

	// Override the wsURL for testing
	ynisonClient.overrideWSURL(wsURL)

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	err := ynisonClient.Connect(ctx)
	if err != nil {
		t.Fatalf("Connect failed: %v", err)
	}

	if !ynisonClient.IsConnected() {
		t.Error("Expected client to be connected after Connect")
	}

	// Wait a bit for the initial message to be sent
	time.Sleep(100 * time.Millisecond)

	// Verify that an UpdateFullState message was sent
	if len(receivedMessages) == 0 {
		t.Error("Expected at least one message to be sent")
	} else {
		var req proto.PutYnisonStateRequest
		if err := json.Unmarshal(receivedMessages[0], &req); err != nil {
			t.Fatalf("Failed to unmarshal sent message: %v", err)
		}
		if req.UpdateFullState == nil {
			t.Error("Expected UpdateFullState in first message")
		}
		if req.UpdateFullState.Device == nil {
			t.Error("Expected Device in UpdateFullState")
		}
		if req.UpdateFullState.Device.Info.DeviceId != "test-device-123" {
			t.Errorf("Expected DeviceId 'test-device-123', got '%s'", req.UpdateFullState.Device.Info.DeviceId)
		}
	}

	// Cleanup
	err = ynisonClient.Disconnect()
	if err != nil {
		t.Errorf("Disconnect failed: %v", err)
	}

	if ynisonClient.IsConnected() {
		t.Error("Expected client to be disconnected after Disconnect")
	}
}

// TestYnisonClient_Disconnect tests the Disconnect method
func TestYnisonClient_Disconnect(t *testing.T) {
	// Create a mock WebSocket server
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		upgrader := websocket.Upgrader{
			CheckOrigin: func(r *http.Request) bool { return true },
		}
		conn, err := upgrader.Upgrade(w, r, nil)
		if err != nil {
			return
		}
		defer conn.Close()

		// Keep connection open until client closes it
		for {
			_, _, err := conn.ReadMessage()
			if err != nil {
				return
			}
		}
	}))
	defer server.Close()

	wsURL := "ws" + server.URL[4:]

	c := client.NewClient(client.ClientConfig{
		Token: "test-token",
	})

	config := DeviceConfig{
		DeviceID: "test-device-disconnect",
	}

	ynisonClient := NewYnisonClient(c, config)
	ynisonClient.overrideWSURL(wsURL)

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	err := ynisonClient.Connect(ctx)
	if err != nil {
		t.Fatalf("Connect failed: %v", err)
	}

	if !ynisonClient.IsConnected() {
		t.Error("Expected client to be connected")
	}

	err = ynisonClient.Disconnect()
	if err != nil {
		t.Errorf("Disconnect failed: %v", err)
	}

	if ynisonClient.IsConnected() {
		t.Error("Expected client to be disconnected after Disconnect")
	}

	// Calling Disconnect again should not error
	err = ynisonClient.Disconnect()
	if err != nil {
		t.Errorf("Second Disconnect should not error: %v", err)
	}
}

// TestYnisonClient_UpdatePlayingStatus tests the UpdatePlayingStatus method
func TestYnisonClient_UpdatePlayingStatus(t *testing.T) {
	var receivedMessages [][]byte
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		upgrader := websocket.Upgrader{
			CheckOrigin: func(r *http.Request) bool { return true },
		}
		conn, err := upgrader.Upgrade(w, r, nil)
		if err != nil {
			return
		}
		defer conn.Close()

		for {
			_, message, err := conn.ReadMessage()
			if err != nil {
				return
			}
			receivedMessages = append(receivedMessages, message)
		}
	}))
	defer server.Close()

	wsURL := "ws" + server.URL[4:]

	c := client.NewClient(client.ClientConfig{
		Token: "test-token",
	})

	config := DeviceConfig{
		DeviceID: "test-device-status",
	}

	ynisonClient := NewYnisonClient(c, config)
	ynisonClient.overrideWSURL(wsURL)

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	err := ynisonClient.Connect(ctx)
	if err != nil {
		t.Fatalf("Connect failed: %v", err)
	}

	// Wait for initial connection message
	time.Sleep(100 * time.Millisecond)
	initialMsgCount := len(receivedMessages)

	// Create a playing status
	status := CreatePlayingStatus(50000, 200000, false, 1.0, "test-device-status")

	// Update playing status
	err = ynisonClient.UpdatePlayingStatus(ctx, status)
	if err != nil {
		t.Fatalf("UpdatePlayingStatus failed: %v", err)
	}

	// Wait for message to be sent
	time.Sleep(100 * time.Millisecond)

	// Verify the UpdatePlayingStatus message was sent
	if len(receivedMessages) <= initialMsgCount {
		t.Error("Expected UpdatePlayingStatus message to be sent")
	} else {
		var req proto.PutYnisonStateRequest
		if err := json.Unmarshal(receivedMessages[initialMsgCount], &req); err != nil {
			t.Fatalf("Failed to unmarshal sent message: %v", err)
		}
		if req.UpdatePlayingStatus == nil {
			t.Error("Expected UpdatePlayingStatus in message")
		}
		if req.UpdatePlayingStatus.PlayingStatus == nil {
			t.Error("Expected PlayingStatus in UpdatePlayingStatus")
		}
		if req.UpdatePlayingStatus.PlayingStatus.ProgressMs != 50000 {
			t.Errorf("Expected ProgressMs 50000, got %d", req.UpdatePlayingStatus.PlayingStatus.ProgressMs)
		}
		if req.UpdatePlayingStatus.PlayingStatus.DurationMs != 200000 {
			t.Errorf("Expected DurationMs 200000, got %d", req.UpdatePlayingStatus.PlayingStatus.DurationMs)
		}
		if req.UpdatePlayingStatus.PlayingStatus.Paused != false {
			t.Errorf("Expected Paused false, got %v", req.UpdatePlayingStatus.PlayingStatus.Paused)
		}
		if req.UpdatePlayingStatus.PlayingStatus.PlaybackSpeed != 1.0 {
			t.Errorf("Expected PlaybackSpeed 1.0, got %f", req.UpdatePlayingStatus.PlayingStatus.PlaybackSpeed)
		}
		if req.UpdatePlayingStatus.PlayingStatus.Version.DeviceId != "test-device-status" {
			t.Errorf("Expected DeviceId 'test-device-status', got '%s'", req.UpdatePlayingStatus.PlayingStatus.Version.DeviceId)
		}
		if req.Rid == "" {
			t.Error("Expected non-empty Rid")
		}
	}

	err = ynisonClient.Disconnect()
	if err != nil {
		t.Errorf("Disconnect failed: %v", err)
	}
}

// TestYnisonClient_UpdatePlayingStatus_NotConnected tests UpdatePlayingStatus when not connected
func TestYnisonClient_UpdatePlayingStatus_NotConnected(t *testing.T) {
	c := client.NewClient(client.ClientConfig{
		Token: "test-token",
	})

	config := DeviceConfig{
		DeviceID: "test-device-not-connected",
	}

	ynisonClient := NewYnisonClient(c, config)

	status := CreatePlayingStatus(50000, 200000, false, 1.0, "test-device-not-connected")

	err := ynisonClient.UpdatePlayingStatus(context.Background(), status)
	if err == nil {
		t.Error("Expected error when not connected")
	}
	if err != nil && err.Error() != "not connected" {
		t.Errorf("Expected 'not connected' error, got: %v", err)
	}
}

// TestYnisonClient_Connect_NoToken tests Connect without a token
func TestYnisonClient_Connect_NoToken(t *testing.T) {
	c := client.NewClient(client.ClientConfig{
		Token: "",
	})

	config := DeviceConfig{
		DeviceID: "test-device-no-token",
	}

	ynisonClient := NewYnisonClient(c, config)

	err := ynisonClient.Connect(context.Background())
	if err == nil {
		t.Error("Expected error when no token")
	}
	if err != nil && err.Error() != "no auth token available" {
		t.Errorf("Expected 'no auth token available' error, got: %v", err)
	}
}

// TestYnisonClient_IsConnected tests the IsConnected method
func TestYnisonClient_IsConnected(t *testing.T) {
	c := client.NewClient(client.ClientConfig{
		Token: "test-token",
	})

	config := DeviceConfig{
		DeviceID: "test-device-isconnected",
	}

	ynisonClient := NewYnisonClient(c, config)

	if ynisonClient.IsConnected() {
		t.Error("Expected client to not be connected initially")
	}

	// We can't easily test connected state without a real server,
	// but we verified this in the Connect/Disconnect tests
}

// TestYnisonClient_RegisterHandler tests handler registration
func TestYnisonClient_RegisterHandler(t *testing.T) {
	c := client.NewClient(client.ClientConfig{
		Token: "test-token",
	})

	config := DeviceConfig{
		DeviceID: "test-device-handler",
	}

	ynisonClient := NewYnisonClient(c, config)

	ynisonClient.RegisterHandler("test", func(resp *proto.PutYnisonStateResponse) {})

	// We can't easily test handler invocation without a real server,
	// but we can verify the handler is registered
	ynisonClient.UnregisterHandler("test")

	// Re-register and verify it doesn't panic
	ynisonClient.RegisterHandler("test2", func(resp *proto.PutYnisonStateResponse) {})
	ynisonClient.UnregisterHandler("test2")
	ynisonClient.UnregisterHandler("nonexistent") // Should not panic
}

// TestYnisonClient_DisconnectWithoutConnect tests Disconnect without prior Connect
func TestYnisonClient_DisconnectWithoutConnect(t *testing.T) {
	c := client.NewClient(client.ClientConfig{
		Token: "test-token",
	})

	config := DeviceConfig{
		DeviceID: "test-device-disconnect-no-connect",
	}

	ynisonClient := NewYnisonClient(c, config)

	// Should not panic or error
	err := ynisonClient.Disconnect()
	if err != nil {
		t.Errorf("Disconnect without connect should not error: %v", err)
	}
}