package odds

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

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

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

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

// TODO Add the optimization to get 10 events at the same time
func (s *ServiceImpl) FetchNonLiveOdds(ctx context.Context) error {
	eventIDs, err := s.store.GetAllUpcomingEvents(ctx)
	if err != nil {
		log.Printf("❌ Failed to fetch upcoming event IDs: %v", err)
		return err
	}

	var errs []error

	for index, event := range eventIDs {

		eventID, err := strconv.ParseInt(event.ID, 10, 64)
		if err != nil {
			s.logger.Error("Failed to parse event id")
			return err
		}

		url := fmt.Sprintf("https://api.b365api.com/v3/bet365/prematch?token=%s&FI=%d", s.config.Bet365Token, eventID)

		log.Printf("📡 Fetching prematch odds for event ID: %d (%d/%d)  ", eventID, index, len(eventIDs))

		req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
		if err != nil {
			log.Printf("❌ Failed to create request for event %d: %v", eventID, err)
			continue
		}

		resp, err := s.client.Do(req)
		if err != nil {
			log.Printf("❌ Failed to fetch prematch odds for event %d: %v", eventID, err)
			continue
		}
		defer resp.Body.Close()

		body, err := io.ReadAll(resp.Body)
		if err != nil {
			log.Printf("❌ Failed to read response body for event %d: %v", eventID, err)
			continue
		}
		var oddsData domain.BaseNonLiveOddResponse

		if err := json.Unmarshal(body, &oddsData); err != nil || oddsData.Success != 1 || len(oddsData.Results) == 0 {
			log.Printf("❌ Invalid prematch data for event %d", eventID)
			continue
		}

		sportID, err := strconv.ParseInt(event.SportID, 10, 64)

		switch sportID {
		case domain.FOOTBALL:
			if err := s.parseFootball(ctx, oddsData.Results[0]); err != nil {
				s.logger.Error("Error while inserting football odd")
				errs = append(errs, err)
			}
		case domain.BASKETBALL:
			if err := s.parseBasketball(ctx, oddsData.Results[0]); err != nil {
				s.logger.Error("Error while inserting basketball odd")
				errs = append(errs, err)
			}
		case domain.ICE_HOCKEY:
			if err := s.parseIceHockey(ctx, oddsData.Results[0]); err != nil {
				s.logger.Error("Error while  inserting ice hockey odd")
				errs = append(errs, err)
			}
		}

		// result := oddsData.Results[0]

	}

	return nil
}

func (s *ServiceImpl) parseFootball(ctx context.Context, res json.RawMessage) error {
	var footballRes domain.FootballOddsResponse
	if err := json.Unmarshal(res, &footballRes); err != nil {
		s.logger.Error("Failed to unmarshal football result", "error", err)
		return err
	}
	if footballRes.EventID == "" && footballRes.FI == "" {
		s.logger.Error("Skipping football result with no valid Event ID", "eventID", footballRes.EventID, "fi", footballRes.FI)
		return fmt.Errorf("Skipping football result with no valid Event ID Event ID %v", footballRes.EventID)
	}
	sections := map[string]domain.OddsSection{
		"main":        footballRes.Main,
		"asian_lines": footballRes.AsianLines,
		"goals":       footballRes.Goals,
		"half":        footballRes.Half,
	}

	var errs []error

	for oddCategory, section := range sections {
		if err := s.storeSection(ctx, footballRes.EventID, footballRes.FI, oddCategory, section); err != nil {
			s.logger.Error("Error storing football section", "eventID", footballRes.FI, "odd", oddCategory)
			log.Printf("⚠️  Error when storing football %v", err)
			errs = append(errs, err)
		}
	}

	if len(errs) > 0 {
		return errors.Join(errs...)
	}

	return nil
}

func (s *ServiceImpl) parseBasketball(ctx context.Context, res json.RawMessage) error {
	var basketballRes domain.BasketballOddsResponse
	if err := json.Unmarshal(res, &basketballRes); err != nil {
		s.logger.Error("Failed to unmarshal basketball result", "error", err)
		return err
	}
	if basketballRes.EventID == "" && basketballRes.FI == "" {
		s.logger.Error("Skipping basketball result with no valid Event ID")
		return fmt.Errorf("Skipping basketball result with no valid Event ID")
	}
	sections := map[string]domain.OddsSection{
		"main":          basketballRes.Main,
		"half_props":    basketballRes.HalfProps,
		"quarter_props": basketballRes.QuarterProps,
		"team_props":    basketballRes.TeamProps,
	}

	var errs []error

	for oddCategory, section := range sections {
		if err := s.storeSection(ctx, basketballRes.EventID, basketballRes.FI, oddCategory, section); err != nil {
			s.logger.Error("Skipping result with no valid Event ID")
			errs = append(errs, err)
			continue
		}
	}

	for _, section := range basketballRes.Others {
		if err := s.storeSection(ctx, basketballRes.EventID, basketballRes.FI, "others", section); err != nil {
			s.logger.Error("Skipping result with no valid Event ID")
			errs = append(errs, err)
			continue
		}
	}

	if len(errs) > 0 {
		return errors.Join(errs...)
	}

	return nil
}
func (s *ServiceImpl) parseIceHockey(ctx context.Context, res json.RawMessage) error {
	var iceHockeyRes domain.IceHockeyOddsResponse
	if err := json.Unmarshal(res, &iceHockeyRes); err != nil {
		s.logger.Error("Failed to unmarshal ice hockey result", "error", err)
		return err
	}
	if iceHockeyRes.EventID == "" && iceHockeyRes.FI == "" {
		s.logger.Error("Skipping result with no valid Event ID")
		return fmt.Errorf("Skipping result with no valid Event ID")
	}
	sections := map[string]domain.OddsSection{
		"main":       iceHockeyRes.Main,
		"main_2":     iceHockeyRes.Main2,
		"1st_period": iceHockeyRes.FirstPeriod,
	}

	var errs []error

	for oddCategory, section := range sections {
		if err := s.storeSection(ctx, iceHockeyRes.EventID, iceHockeyRes.FI, oddCategory, section); err != nil {
			s.logger.Error("Skipping result with no valid Event ID")
			errs = append(errs, err)
			continue
		}
	}

	for _, section := range iceHockeyRes.Others {
		if err := s.storeSection(ctx, iceHockeyRes.EventID, iceHockeyRes.FI, "others", section); err != nil {
			s.logger.Error("Skipping result with no valid Event ID")
			errs = append(errs, err)
			continue
		}
	}

	if len(errs) > 0 {
		return errors.Join(errs...)
	}

	return nil
}

func (s *ServiceImpl) storeSection(ctx context.Context, eventID, fi, sectionName string, section domain.OddsSection) error {
	if len(section.Sp) == 0 {
		return nil
	}

	updatedAtUnix, _ := strconv.ParseInt(section.UpdatedAt, 10, 64)
	updatedAt := time.Unix(updatedAtUnix, 0)

	var errs []error
	for marketType, market := range section.Sp {
		if len(market.Odds) == 0 {
			continue
		}

		// Check if the market id is a string
		var marketIDstr string
		err := json.Unmarshal(market.ID, &marketIDstr)
		if err != nil {
			// check if its int
			var marketIDint int
			err := json.Unmarshal(market.ID, &marketIDint)
			if err != nil {
				s.logger.Error("Invalid market id", "marketID", marketIDstr, "marketName", market.Name)
				errs = append(errs, err)
			}
		}

		marketIDint, err := strconv.ParseInt(marketIDstr, 10, 64)
		if err != nil {
			s.logger.Error("Invalid market id", "marketID", marketIDstr, "marketName", market.Name)
			errs = append(errs, err)
			continue
		}

		isSupported, ok := domain.SupportedMarkets[marketIDint]

		if !ok || !isSupported {
			// s.logger.Info("Unsupported market_id", "marketID", marketIDint, "marketName", market.Name)
			continue
		}

		marketRecord := domain.Market{
			EventID:        eventID,
			FI:             fi,
			MarketCategory: sectionName,
			MarketType:     marketType,
			MarketName:     market.Name,
			MarketID:       marketIDstr,
			UpdatedAt:      updatedAt,
			Odds:           market.Odds,
		}

		err = s.store.SaveNonLiveMarket(ctx, marketRecord)
		if err != nil {
			s.logger.Error("failed to save market", "market_id", market.ID, "error", err)
			errs = append(errs, fmt.Errorf("market %s: %w", market.ID, err))
			continue
		}
	}

	if len(errs) > 0 {
		return errors.Join(errs...)
	}
	return nil
}

func (s *ServiceImpl) GetPrematchOdds(ctx context.Context, eventID string) ([]domain.Odd, error) {
	return s.store.GetPrematchOdds(ctx, eventID)
}

func (s *ServiceImpl) GetALLPrematchOdds(ctx context.Context) ([]domain.Odd, error) {
	return s.store.GetALLPrematchOdds(ctx)
}

func (s *ServiceImpl) GetRawOddsByMarketID(ctx context.Context, marketID string, upcomingID string) (domain.RawOddsByMarketID, error) {
	rows, err := s.store.GetRawOddsByMarketID(ctx, marketID, upcomingID)
	if err != nil {
		return domain.RawOddsByMarketID{}, err
	}

	return rows, nil
}

func (s *ServiceImpl) GetPrematchOddsByUpcomingID(ctx context.Context, upcomingID string) ([]domain.Odd, error) {
	return s.store.GetPrematchOddsByUpcomingID(ctx, upcomingID)
}

func (s *ServiceImpl) GetPaginatedPrematchOddsByUpcomingID(ctx context.Context, upcomingID string, limit, offset domain.ValidInt64) ([]domain.Odd, error) {
	return s.store.GetPaginatedPrematchOddsByUpcomingID(ctx, upcomingID, limit, offset)
}