package streamer

import (
	"bytes"
	"donat-widget/internal/model"
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"net/http"
	"strings"
)

func New(host, port string) *ClientStreamer {
	return &ClientStreamer{
		client:  &http.Client{},
		baseURL: "http://" + host + ":" + port + "/api/streamer",
	}
}

type ClientStreamer struct {
	client  *http.Client
	baseURL string
}

func (c *ClientStreamer) UpdateAvatarID(token string, avatarUUID string) error {
	const endpoint = "/avatar"

	// Подготовка тела запроса
	requestBody := model.UpdateAvatarBody{
		Avatar: avatarUUID,
	}

	jsonBody, err := json.Marshal(requestBody)
	if err != nil {
		slog.Error("marshal request body failed", "error", err)
		return fmt.Errorf("request body marshal error: %w", err)
	}

	req, err := http.NewRequest(
		"PATCH",
		c.baseURL+endpoint,
		bytes.NewBuffer(jsonBody),
	)
	if err != nil {
		slog.Error("create request failed", "error", err)
		return fmt.Errorf("request creation error: %w", err)
	}

	// Установка заголовков
	req.Header.Set("Authorization", token)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept", "application/json")

	resp, err := c.client.Do(req)
	if err != nil {
		slog.Error("request failed", "error", err)
		return fmt.Errorf("HTTP request error: %w", err)
	}
	defer resp.Body.Close()

	// Проверка статус-кода
	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		slog.Error("unexpected status code",
			"status", resp.Status,
			"response", string(body))
		return fmt.Errorf("HTTP %d: %s", resp.StatusCode, resp.Status)
	}

	return nil
}

func (c *ClientStreamer) GetAvatarIdByToken(token string) (string, error) {
	const endpoint = "/info"
	var result model.StreamerInfo

	req, err := http.NewRequest("GET", c.baseURL+endpoint, nil)
	if err != nil {
		slog.Error("create request failed", "error", err)
		return "", fmt.Errorf("request creation error: %w", err)
	}

	req.Header.Set("Authorization", token)
	req.Header.Set("Accept", "application/json")

	resp, err := c.client.Do(req)
	if err != nil {
		slog.Error("request failed", "error", err)
		return "", fmt.Errorf("HTTP request error: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		slog.Error("unexpected status code",
			"status", resp.Status,
			"response", string(body))
		return "", fmt.Errorf("HTTP %d: %s", resp.StatusCode, resp.Status)
	}

	rawBody, err := io.ReadAll(resp.Body)
	if err != nil {
		slog.Error("read body failed", "error", err)
		return "", fmt.Errorf("read body error: %w", err)
	}

	if err := json.Unmarshal(rawBody, &result); err != nil {
		slog.Error("JSON parse error",
			"error", err,
			"response", string(rawBody))
		return "", fmt.Errorf("JSON unmarshal error: %w", err)
	}

	return extractFileID(result.Avatar), nil
}

func (c *ClientStreamer) GetAvatarById(accountId string) (string, error) {
	var endpoint = "/info" + "/" + accountId
	var result model.StreamerInfo

	req, err := http.NewRequest("GET", c.baseURL+endpoint, nil)
	if err != nil {
		slog.Error("create request failed", "error", err)
		return "", fmt.Errorf("request creation error: %w", err)
	}

	req.Header.Set("Accept", "application/json")

	resp, err := c.client.Do(req)
	if err != nil {
		slog.Error("request failed", "error", err)
		return "", fmt.Errorf("HTTP request error: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		slog.Error("unexpected status code",
			"status", resp.Status,
			"response", string(body))
		return "", fmt.Errorf("HTTP %d: %s", resp.StatusCode, resp.Status)
	}

	rawBody, err := io.ReadAll(resp.Body)
	if err != nil {
		slog.Error("read body failed", "error", err)
		return "", fmt.Errorf("read body error: %w", err)
	}

	if err := json.Unmarshal(rawBody, &result); err != nil {
		slog.Error("JSON parse error",
			"error", err,
			"response", string(rawBody))
		return "", fmt.Errorf("JSON unmarshal error: %w", err)
	}

	return extractFileID(result.Avatar), nil
}

// extractFileID извлекает последний сегмент URL (fileId)
func extractFileID(avatarURL string) string {
	if avatarURL == "" {
		return ""
	}
	// Удаляем возможный завершающий слэш
	avatarURL = strings.TrimSuffix(avatarURL, "/")
	// Разделяем URL по слэшам
	parts := strings.Split(avatarURL, "/")
	if len(parts) == 0 {
		return ""
	}
	// Берём последнюю часть
	return parts[len(parts)-1]
}

func (c *ClientStreamer) post(
	path string,
	body map[string]any,
	token string,
) ([]byte, error) {
	bytesBody, err := json.Marshal(body)
	if err != nil {
		slog.Error("json.Marshal error", "error", err)
		return nil, fmt.Errorf("marshal error: %w", err)
	}

	// Создаем новый запрос
	req, err := http.NewRequest(
		"POST",
		c.baseURL+path,
		bytes.NewReader(bytesBody),
	)
	if err != nil {
		slog.Error("request creation failed", "error", err)
		return nil, fmt.Errorf("request error: %w", err)
	}

	req.Header.Set("Content-Type", "application/json")
	if token != "" {
		req.Header.Set("Authorization", "Bearer "+token)
	}

	resp, err := c.client.Do(req)
	if err != nil {
		slog.Error("request failed", "error", err)
		return nil, fmt.Errorf("HTTP error: %w", err)
	}
	defer resp.Body.Close()

	// Проверяем статус
	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body) // Попробуем прочитать тело ошибки
		slog.Error("unexpected status",
			"status", resp.Status,
			"body", string(body))
		return nil, fmt.Errorf("status %d: %s", resp.StatusCode, resp.Status)
	}

	// Читаем ответ
	response, err := io.ReadAll(resp.Body)
	if err != nil {
		slog.Error("read body failed", "error", err)
		return nil, fmt.Errorf("read error: %w", err)
	}

	return response, nil
}