import { Injectable, Logger } from "@nestjs/common";
import axios from "axios";

/**
 * Spor Toto API response types
 * Source: https://sportotov2.iddaa.com/SporToto
 */
export interface SporTotoApiEvent {
  eventNo: number;
  eventName: string; // "Blackpool-Burton Albion"
  competitionName: string; // "İN1"
  eventDate: string; // "2026-03-28T18:00:00"
  result: string | null;
  winner: string | null;
}

export interface SporTotoApiDividend {
  winnerCount15?: number;
  dividend15?: number;
  winnerCount14?: number;
  dividend14?: number;
  winnerCount13?: number;
  dividend13?: number;
  winnerCount12?: number;
  dividend12?: number;
}

export interface SporTotoApiResponse {
  isSuccess: boolean;
  data: {
    payinBeginDate: string;
    payinEndDate: string;
    gameCycleNo: number;
    dividends: SporTotoApiDividend | null;
    events: SporTotoApiEvent[];
    programName: string;
    nextDrawExpectedWins: number | null;
  } | null;
  message: string;
  error: string | null;
  info: string | null;
  dateTime: string | null;
}

@Injectable()
export class TotoFetcherService {
  private readonly logger = new Logger(TotoFetcherService.name);
  private readonly apiUrl = "https://sportotov2.iddaa.com/SporToto";

  /**
   * Fetch current bulletin from Spor Toto API
   */
  async fetchCurrentBulletin(): Promise<SporTotoApiResponse | null> {
    try {
      this.logger.log("Fetching current Spor Toto bulletin...");
      const response = await axios.get<SporTotoApiResponse>(this.apiUrl, {
        timeout: 10000,
        headers: {
          Accept: "application/json",
          "User-Agent": "SuggestBet/1.0",
        },
      });

      if (!response.data?.isSuccess || !response.data?.data) {
        this.logger.warn(
          "Spor Toto API returned unsuccessful response",
          response.data?.message,
        );
        return null;
      }

      this.logger.log(
        `Fetched bulletin: Cycle ${response.data.data.gameCycleNo} — ${response.data.data.programName} (${response.data.data.events.length} events)`,
      );
      return response.data;
    } catch (error) {
      if (axios.isAxiosError(error)) {
        this.logger.error(
          `Spor Toto API error: ${error.message}`,
          error.response?.status,
        );
      } else {
        this.logger.error("Spor Toto fetch failed", error);
      }
      return null;
    }
  }

  /**
   * Parse "Blackpool-Burton Albion" → { home: "Blackpool", away: "Burton Albion" }
   */
  parseEventName(eventName: string): {
    homeTeam: string;
    awayTeam: string;
  } {
    const parts = eventName.split("-");
    if (parts.length >= 2) {
      return {
        homeTeam: parts[0].trim(),
        awayTeam: parts.slice(1).join("-").trim(),
      };
    }
    return { homeTeam: eventName, awayTeam: "" };
  }

  /**
   * Map API result/winner to TotoMatchResult enum value
   * API returns: "1" (HOME), "0" (DRAW), "2" (AWAY)
   */
  mapResultToEnum(winner: string | null): "HOME" | "DRAW" | "AWAY" | null {
    if (!winner) return null;
    switch (winner) {
      case "1":
        return "HOME";
      case "0":
      case "X":
        return "DRAW";
      case "2":
        return "AWAY";
      default:
        return null;
    }
  }
}