package result

import (
	"context"
	"encoding/json"
	"fmt"
	"log/slog"
	"net/http"
	"strconv"
	"strings"
	"time"

	"github.com/SamuelTariku/FortuneBet-Backend/internal/config"
	"github.com/SamuelTariku/FortuneBet-Backend/internal/domain"
	"github.com/SamuelTariku/FortuneBet-Backend/internal/repository"
)

type Service struct {
	repo   *repository.Store
	config *config.Config
	logger *slog.Logger
	client *http.Client
}

func NewService(repo *repository.Store, cfg *config.Config, logger *slog.Logger) *Service {
	return &Service{
		repo:   repo,
		config: cfg,
		logger: logger,
		client: &http.Client{Timeout: 10 * time.Second},
	}
}

type ResultCheck struct {
}

func (s *Service) FetchAndProcessResults(ctx context.Context) error {
	// TODO: Optimize this because there could be many bet outcomes for the same odd
	// Take market id and match result as param and update all the bet outcomes at the same time
	events, err := s.repo.GetExpiredUpcomingEvents(ctx)
	if err != nil {
		s.logger.Error("Failed to fetch events")
		return err
	}

	for _, event := range events {
		eventID, err := strconv.ParseInt(event.ID, 10, 64)
		if err != nil {
			s.logger.Error("Failed to parse event id")
			return err
		}
		outcomes, err := s.repo.GetBetOutcomeByEventID(ctx, eventID)
		if err != nil {
			s.logger.Error("Failed to get pending bet outcomes", "error", err)
			return err
		}

		for _, outcome := range outcomes {
			if outcome.Expires.After(time.Now()) {
				continue
			}

			sportID, err := strconv.ParseInt(event.SportID, 10, 64)
			if err != nil {
				s.logger.Error("Sport ID is invalid", "event_id", outcome.EventID, "error", err)
				continue
			}

			result, err := s.fetchResult(ctx, outcome.EventID, outcome.OddID, outcome.MarketID, sportID, outcome)
			if err != nil {
				s.logger.Error("Failed to fetch result", "event_id", outcome.EventID, "error", err)
				continue
			}

			// _, err = s.repo.CreateResult(ctx, domain.CreateResult{
			// 	BetOutcomeID: outcome.ID,
			// 	EventID:      outcome.EventID,
			// 	OddID:        outcome.OddID,
			// 	MarketID:     outcome.MarketID,
			// 	Status:       result.Status,
			// 	Score:        result.Score,
			// })
			// if err != nil {
			// 	s.logger.Error("Failed to store result", "bet_outcome_id", outcome.ID, "error", err)
			// 	continue
			// }

			err = s.repo.UpdateBetOutcomeStatus(ctx, outcome.ID, result.Status)
			if err != nil {
				s.logger.Error("Failed to update bet outcome status", "bet_outcome_id", outcome.ID, "error", err)
				continue
			}
		}
		err = s.repo.DeleteEvent(ctx, event.ID)
		if err != nil {
			s.logger.Error("Failed to remove event", "event_id", event.ID, "error", err)
			return err
		}
	}

	return nil
}

// func (s *Service) FetchAndStoreResult(ctx context.Context, eventID string) error {
// 	url := fmt.Sprintf("https://api.b365api.com/v1/bet365/result?token=%s&event_id=%s", s.config.Bet365Token, eventID)

// 	res, err := s.client.Get(url)
// 	if err != nil {
// 		s.logger.Error("Failed to fetch result", "event_id", eventID, "error", err)
// 		return fmt.Errorf("failed to fetch result: %w", err)
// 	}
// 	defer res.Body.Close()

// 	if res.StatusCode != http.StatusOK {
// 		s.logger.Error("Unexpected status code", "event_id", eventID, "status_code", res.StatusCode)
// 		return fmt.Errorf("unexpected status code: %d", res.StatusCode)
// 	}

// 	var apiResp domain.BaseResultResponse
// 	if err := json.NewDecoder(res.Body).Decode(&apiResp); err != nil {
// 		s.logger.Error("Failed to decode result", "event_id", eventID, "error", err)
// 		return fmt.Errorf("failed to decode result: %w", err)
// 	}

// 	if apiResp.Success != 1 || len(apiResp.Results) == 0 {
// 		s.logger.Error("Invalid API response", "event_id", eventID)
// 		return fmt.Errorf("no result returned from API")
// 	}

// 	r := apiResp.Results[0]
// 	if r.TimeStatus != "3" {
// 		s.logger.Warn("Match not yet completed", "event_id", eventID)
// 		return fmt.Errorf("match not yet completed")
// 	}

// 	eventIDInt, err := strconv.ParseInt(eventID, 10, 64)
// 	if err != nil {
// 		s.logger.Error("Failed to parse event_id", "event_id", eventID, "error", err)
// 		return fmt.Errorf("failed to parse event_id: %w", err)
// 	}

// 	halfScore := ""
// 	if r.Scores.FirstHalf.Home != "" {
// 		halfScore = fmt.Sprintf("%s-%s", r.Scores.FirstHalf.Home, r.Scores.FirstHalf.Away)
// 	}

// 	result := domain.Result{
// 		EventID:       eventIDInt,
// 		Status:        domain.OUTCOME_STATUS_PENDING,
// 		Score:         r.SS,
// 		FullTimeScore: r.SS,
// 		HalfTimeScore: halfScore,
// 		SS:            r.SS,
// 		Scores:        make(map[string]domain.Score),
// 	}
// 	for k, v := range map[string]domain.Score{
// 		"1": r.Scores.FirstHalf,
// 		"2": r.Scores.SecondHalf,
// 	} {
// 		result.Scores[k] = domain.Score{
// 			Home: v.Home,
// 			Away: v.Away,
// 		}
// 	}

// 	return s.repo.InsertResult(ctx, result)
// }

func (s *Service) fetchResult(ctx context.Context, eventID, oddID, marketID, sportID int64, outcome domain.BetOutcome) (domain.CreateResult, error) {
	url := fmt.Sprintf("https://api.b365api.com/v1/bet365/result?token=%s&event_id=%d", s.config.Bet365Token, eventID)
	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
	if err != nil {
		s.logger.Error("Failed to create request", "event_id", eventID, "error", err)
		return domain.CreateResult{}, err
	}

	resp, err := s.client.Do(req)
	if err != nil {
		s.logger.Error("Failed to fetch result", "event_id", eventID, "error", err)
		return domain.CreateResult{}, err
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		s.logger.Error("Unexpected status code", "event_id", eventID, "status_code", resp.StatusCode)
		return domain.CreateResult{}, fmt.Errorf("unexpected status code: %d", resp.StatusCode)
	}

	var resultResp domain.BaseResultResponse
	if err := json.NewDecoder(resp.Body).Decode(&resultResp); err != nil {
		s.logger.Error("Failed to decode result", "event_id", eventID, "error", err)
		return domain.CreateResult{}, err
	}

	if resultResp.Success != 1 || len(resultResp.Results) == 0 {
		s.logger.Error("Invalid API response", "event_id", eventID)
		return domain.CreateResult{}, fmt.Errorf("invalid API response")
	}

	var result domain.CreateResult
	switch sportID {
	case domain.FOOTBALL:
		result, err = s.parseFootball(resultResp.Results[0], eventID, oddID, marketID, outcome)
		if err != nil {
			s.logger.Error("Failed to parse football", "event_id", eventID, "market_id", marketID, "error", err)
			return domain.CreateResult{}, err
		}

	case domain.BASKETBALL:
		result, err = s.parseBasketball(resultResp.Results[0], eventID, oddID, marketID, outcome)
		if err != nil {
			s.logger.Error("Failed to parse basketball", "event_id", eventID, "market_id", marketID, "error", err)
			return domain.CreateResult{}, err
		}
	default:
		s.logger.Error("Unsupported sport", "sport", sportID)
		return domain.CreateResult{}, fmt.Errorf("unsupported sport: %v", sportID)
	}

	return result, nil

}

func (s *Service) parseFootball(resultRes json.RawMessage, eventID, oddID, marketID int64, outcome domain.BetOutcome) (domain.CreateResult, error) {
	var fbResp domain.FootballResultResponse
	if err := json.Unmarshal(resultRes, &fbResp); err != nil {
		s.logger.Error("Failed to unmarshal football result", "event_id", eventID, "error", err)
		return domain.CreateResult{}, err
	}
	result := fbResp
	if result.TimeStatus != "3" {
		s.logger.Warn("Match not yet completed", "event_id", eventID)
		return domain.CreateResult{}, fmt.Errorf("match not yet completed")
	}

	finalScore := parseSS(result.SS)
	firstHalfScore := parseSS(fmt.Sprintf("%s-%s", result.Scores.FirstHalf.Home, result.Scores.FirstHalf.Away))

	corners := parseStats(result.Stats.Corners)
	status, err := s.evaluateFootballOutcome(outcome, finalScore, firstHalfScore, corners, result.Events)
	if err != nil {
		s.logger.Error("Failed to evaluate outcome", "event_id", eventID, "market_id", marketID, "error", err)
		return domain.CreateResult{}, err
	}

	return domain.CreateResult{
		BetOutcomeID: 0,
		EventID:      eventID,
		OddID:        oddID,
		MarketID:     marketID,
		Status:       status,
		Score:        result.SS,
	}, nil

}

func (s *Service) parseBasketball(response json.RawMessage, eventID, oddID, marketID int64, outcome domain.BetOutcome) (domain.CreateResult, error) {
	var basketBallRes domain.BasketballResultResponse
	if err := json.Unmarshal(response, &basketBallRes); err != nil {
		s.logger.Error("Failed to unmarshal football result", "event_id", eventID, "error", err)
		return domain.CreateResult{}, err
	}
	if basketBallRes.TimeStatus != "3" {
		s.logger.Warn("Match not yet completed", "event_id", eventID)
		return domain.CreateResult{}, fmt.Errorf("match not yet completed")
	}

	status, err := s.evaluateBasketballOutcome(outcome, basketBallRes)
	if err != nil {
		s.logger.Error("Failed to evaluate outcome", "event_id", eventID, "market_id", marketID, "error", err)
		return domain.CreateResult{}, err
	}

	return domain.CreateResult{
		BetOutcomeID: 0,
		EventID:      eventID,
		OddID:        oddID,
		MarketID:     marketID,
		Status:       status,
		Score:        basketBallRes.SS,
	}, nil

}

func parseScore(home string, away string) struct{ Home, Away int } {
	homeVal, _ := strconv.Atoi(strings.TrimSpace(home))
	awaVal, _ := strconv.Atoi(strings.TrimSpace(away))
	return struct{ Home, Away int }{Home: homeVal, Away: awaVal}
}

func parseSS(scoreStr string) struct{ Home, Away int } {
	parts := strings.Split(scoreStr, "-")
	if len(parts) != 2 {
		return struct{ Home, Away int }{0, 0}
	}
	home, _ := strconv.Atoi(strings.TrimSpace(parts[0]))
	away, _ := strconv.Atoi(strings.TrimSpace(parts[1]))
	return struct{ Home, Away int }{Home: home, Away: away}
}

func parseStats(stats []string) struct{ Home, Away int } {
	if len(stats) != 2 {
		return struct{ Home, Away int }{0, 0}
	}
	home, _ := strconv.Atoi(stats[0])
	away, _ := strconv.Atoi(stats[1])
	return struct{ Home, Away int }{Home: home, Away: away}
}

// evaluateOutcome determines the outcome status based on market type and odd
func (s *Service) evaluateFootballOutcome(outcome domain.BetOutcome, finalScore, firstHalfScore struct{ Home, Away int }, corners struct{ Home, Away int }, events []map[string]string) (domain.OutcomeStatus, error) {

	marketConfig := domain.SupportedMarkets["football"]
	if !marketConfig.MarketTypes[outcome.MarketID] {
		s.logger.Warn("Unsupported market type", "market_name", outcome.MarketName)
		return domain.OUTCOME_STATUS_PENDING, fmt.Errorf("unsupported market type: %s", outcome.MarketName)
	}

	switch outcome.MarketID {
	case int64(domain.FOOTBALL_FULL_TIME_RESULT):
		return evaluateFullTimeResult(outcome, finalScore)
	case int64(domain.FOOTBALL_GOALS_OVER_UNDER):
		return evaluateGoalsOverUnder(outcome, finalScore)
	case int64(domain.FOOTBALL_CORRECT_SCORE):
		return evaluateCorrectScore(outcome, finalScore)
	case int64(domain.FOOTBALL_HALF_TIME_RESULT):
		return evaluateHalfTimeResult(outcome, firstHalfScore)
	case int64(domain.FOOTBALL_ASIAN_HANDICAP):
		return evaluateAsianHandicap(outcome, finalScore)
	case int64(domain.FOOTBALL_GOAL_LINE):
		return evaluateGoalLine(outcome, finalScore)
	case int64(domain.FOOTBALL_FIRST_HALF_ASIAN_HANDICAP):
		return evaluateAsianHandicap(outcome, firstHalfScore)
	case int64(domain.FOOTBALL_FIRST_HALF_GOAL_LINE):
		return evaluateGoalLine(outcome, firstHalfScore)
	case int64(domain.FOOTBALL_FIRST_TEAM_TO_SCORE):
		return evaluateFirstTeamToScore(outcome, events)
	case int64(domain.FOOTBALL_GOALS_ODD_EVEN):
		return evaluateGoalsOddEven(outcome, finalScore)
	case int64(domain.FOOTBALL_DOUBLE_CHANCE):
		return evaluateDoubleChance(outcome, finalScore)
	case int64(domain.FOOTBALL_DRAW_NO_BET):
		return evaluateDrawNoBet(outcome, finalScore)
	default:
		s.logger.Warn("Market type not implemented", "market_name", outcome.MarketName)
		return domain.OUTCOME_STATUS_PENDING, fmt.Errorf("market type not implemented: %s", outcome.MarketName)
	}
}

func (s *Service) evaluateBasketballOutcome(outcome domain.BetOutcome, res domain.BasketballResultResponse) (domain.OutcomeStatus, error) {
	marketConfig := domain.SupportedMarkets["basketball"]
	if !marketConfig.MarketTypes[outcome.MarketID] {
		s.logger.Warn("Unsupported market type", "market_name", outcome.MarketName)
		return domain.OUTCOME_STATUS_PENDING, fmt.Errorf("unsupported market type: %s", outcome.MarketName)
	}

	finalScore := parseSS(res.SS)

	firstHalfScore := parseScore(res.Scores.FirstHalf.Home, res.Scores.FirstHalf.Away)
	secondHalfScore := struct{ Home, Away int }{Home: finalScore.Home - firstHalfScore.Home, Away: finalScore.Away - firstHalfScore.Away}

	firstQuarter := parseScore(res.Scores.FirstQuarter.Home, res.Scores.FirstQuarter.Away)
	secondQuarter := parseScore(res.Scores.SecondQuarter.Home, res.Scores.SecondQuarter.Away)
	thirdQuarter := parseScore(res.Scores.ThirdQuarter.Home, res.Scores.ThirdQuarter.Away)
	fourthQuarter := parseScore(res.Scores.FourthQuarter.Home, res.Scores.FourthQuarter.Away)

	switch outcome.MarketID {
	case int64(domain.BASKETBALL_GAME_LINES):
		return evaluateGameLines(outcome, finalScore)
	case int64(domain.BASKETBALL_RESULT_AND_BOTH_TEAMS_TO_SCORE_X_POINTS):
		return evaluateResultAndBTTSX(outcome, finalScore)
	case int64(domain.BASKETBALL_DOUBLE_RESULT):
		return evaluateDoubleResult(outcome, firstHalfScore, secondHalfScore)
	case int64(domain.BASKETBALL_MATCH_RESULT_AND_TOTAL):
		return evaluateResultAndTotal(outcome, finalScore)
	case int64(domain.BASKETBALL_MATCH_HANDICAP_AND_TOTAL):
		return evaluateHandicapAndTotal(outcome, finalScore)
	case int64(domain.BASKETBALL_GAME_TOTAL_ODD_EVEN):
		return evaluateGoalsOddEven(outcome, finalScore)
	case int64(domain.BASKETBALL_TEAM_TOTALS):
		return evaluateGoalsOddEven(outcome, finalScore)

	case int64(domain.BASKETBALL_FIRST_HALF):
		return evaluateGameLines(outcome, firstHalfScore)
	case int64(domain.BASKETBALL_FIRST_HALF_TEAM_TOTALS):
		return evaluateTeamTotal(outcome, firstHalfScore)
	case int64(domain.BASKETBALL_FIRST_HALF_HANDICAP_AND_TOTAL):
		return evaluateHandicapAndTotal(outcome, firstHalfScore)
	case int64(domain.BASKETBALL_FIRST_HALF_BOTH_TEAMS_TO_SCORE_X_POINTS):
		return evaluateBTTSX(outcome, firstHalfScore)
	case int64(domain.BASKETBALL_FIRST_HALF_DOUBLE_CHANCE):
		return evaluateDoubleChance(outcome, firstHalfScore)
	case int64(domain.BASKETBALL_FIRST_HALF_TOTAL_ODD_EVEN):
		return evaluateGoalsOddEven(outcome, firstHalfScore)
	case int64(domain.BASKETBALL_FIRST_HALF_MONEY_LINE_3_WAY):
		return evaluateMoneyLine3Way(outcome, firstHalfScore)
	case int64(domain.BASKETBALL_HIGHEST_SCORING_HALF):
		return evaluateHighestScoringHalf(outcome, firstHalfScore, secondHalfScore)

	case int64(domain.BASKETBALL_FIRST_QUARTER):
		return evaluateGameLines(outcome, firstQuarter)
	case int64(domain.BASKETBALL_FIRST_QUARTER_TEAM_TOTALS):
		return evaluateTeamTotal(outcome, firstQuarter)
	case int64(domain.BASKETBALL_FIRST_QUARTER_TOTAL_ODD_EVEN):
		return evaluateGoalsOddEven(outcome, firstQuarter)
	case int64(domain.BASKETBALL_FIRST_QUARTER_HANDICAP_AND_TOTAL):
		return evaluateHandicapAndTotal(outcome, firstQuarter)
	case int64(domain.BASKETBALL_FIRST_QUARTER_DOUBLE_CHANCE):
		return evaluateDoubleChance(outcome, firstQuarter)
	case int64(domain.BASKETBALL_HIGHEST_SCORING_QUARTER):
		return evaluateHighestScoringQuarter(outcome, firstQuarter, secondQuarter, thirdQuarter, fourthQuarter)

	default:
		s.logger.Warn("Market type not implemented", "market_name", outcome.MarketName)
		return domain.OUTCOME_STATUS_PENDING, fmt.Errorf("market type not implemented: %s", outcome.MarketName)
	}
}