package handlers

import (
	"encoding/json"
	"strconv"
	"time"

	"github.com/SamuelTariku/FortuneBet-Backend/internal/domain"
	"github.com/SamuelTariku/FortuneBet-Backend/internal/web_server/response"
	"github.com/gofiber/fiber/v2"
	"github.com/google/uuid"
)

type CreateBetOutcomeReq struct {
	EventID  int64 `json:"event_id" example:"1"`
	OddID    int64 `json:"odd_id" example:"1"`
	MarketID int64 `json:"market_id" example:"1"`
}

type CreateBetReq struct {
	Outcomes    []CreateBetOutcomeReq `json:"outcomes"`
	Amount      float32               `json:"amount" example:"100.0"`
	TotalOdds   float32               `json:"total_odds" example:"4.22"`
	Status      domain.OutcomeStatus  `json:"status" example:"1"`
	FullName    string                `json:"full_name" example:"John"`
	PhoneNumber string                `json:"phone_number" example:"1234567890"`
	IsShopBet   bool                  `json:"is_shop_bet" example:"false"`
}

type CreateBetRes struct {
	ID            int64                `json:"id" example:"1"`
	Amount        float32              `json:"amount" example:"100.0"`
	TotalOdds     float32              `json:"total_odds" example:"4.22"`
	Status        domain.OutcomeStatus `json:"status" example:"1"`
	FullName      string               `json:"full_name" example:"John"`
	PhoneNumber   string               `json:"phone_number" example:"1234567890"`
	BranchID      int64                `json:"branch_id" example:"2"`
	UserID        int64                `json:"user_id" example:"2"`
	IsShopBet     bool                 `json:"is_shop_bet" example:"false"`
	CreatedNumber int64                `json:"created_number" example:"2"`
	CashedID      string               `json:"cashed_id" example:"21234"`
}
type BetRes struct {
	ID          int64                `json:"id" example:"1"`
	Outcomes    []domain.BetOutcome  `json:"outcomes"`
	Amount      float32              `json:"amount" example:"100.0"`
	TotalOdds   float32              `json:"total_odds" example:"4.22"`
	Status      domain.OutcomeStatus `json:"status" example:"1"`
	FullName    string               `json:"full_name" example:"John"`
	PhoneNumber string               `json:"phone_number" example:"1234567890"`
	BranchID    int64                `json:"branch_id" example:"2"`
	UserID      int64                `json:"user_id" example:"2"`
	IsShopBet   bool                 `json:"is_shop_bet" example:"false"`
	CashedOut   bool                 `json:"cashed_out" example:"false"`
	CashedID    string               `json:"cashed_id" example:"21234"`
}

func convertCreateBet(bet domain.Bet, createdNumber int64) CreateBetRes {
	return CreateBetRes{
		ID:            bet.ID,
		Amount:        bet.Amount.Float64(),
		TotalOdds:     bet.TotalOdds,
		Status:        bet.Status,
		FullName:      bet.FullName,
		PhoneNumber:   bet.PhoneNumber,
		BranchID:      bet.BranchID.Value,
		UserID:        bet.UserID.Value,
		CreatedNumber: createdNumber,
		CashedID:      bet.CashoutID,
	}
}

func convertBet(bet domain.GetBet) BetRes {
	return BetRes{
		ID:          bet.ID,
		Amount:      bet.Amount.Float64(),
		TotalOdds:   bet.TotalOdds,
		Status:      bet.Status,
		FullName:    bet.FullName,
		PhoneNumber: bet.PhoneNumber,
		BranchID:    bet.BranchID.Value,
		UserID:      bet.UserID.Value,
		Outcomes:    bet.Outcomes,
		IsShopBet:   bet.IsShopBet,
		CashedOut:   bet.CashedOut,
		CashedID:    bet.CashoutID,
	}
}

// CreateBet godoc
// @Summary Create a bet
// @Description Creates a bet
// @Tags bet
// @Accept json
// @Produce json
// @Param createBet body CreateBetReq true "Creates bet"
// @Success 200 {object} BetRes
// @Failure 400 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /bet [post]
func (h *Handler) CreateBet(c *fiber.Ctx) error {

	// Get user_id from middleware
	userID := c.Locals("user_id").(int64)

	var req CreateBetReq
	if err := c.BodyParser(&req); err != nil {
		h.logger.Error("Failed to parse CreateBet request", "error", err)
		return fiber.NewError(fiber.StatusBadRequest, "Invalid request body")
	}

	valErrs, ok := h.validator.Validate(c, req)
	if !ok {
		return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", valErrs, nil)
	}

	// Validating user by role
	// Differentiating between offline and online bets
	user, err := h.userSvc.GetUserByID(c.Context(), userID)
	cashoutUUID := uuid.New()
	var bet domain.Bet
	if user.Role == domain.RoleCashier {

		// Get the branch from the branch ID
		branch, err := h.branchSvc.GetBranchByCashier(c.Context(), user.ID)
		if err != nil {
			h.logger.Error("CreateBetReq failed, branch id invalid")
			return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", err, nil)
		}

		// Deduct a percentage of the amount
		// TODO move to service layer. Make it fetch dynamically from company
		var deductedAmount = req.Amount / 10
		err = h.walletSvc.DeductFromWallet(c.Context(), branch.WalletID, domain.ToCurrency(deductedAmount))

		if err != nil {
			h.logger.Error("CreateBetReq failed, unable to deduct from WalletID")
			return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", err, nil)
		}

		bet, err = h.betSvc.CreateBet(c.Context(), domain.CreateBet{
			Amount:      domain.ToCurrency(req.Amount),
			TotalOdds:   req.TotalOdds,
			Status:      req.Status,
			FullName:    req.FullName,
			PhoneNumber: req.PhoneNumber,

			BranchID: domain.ValidInt64{
				Value: branch.ID,
				Valid: true,
			},
			UserID: domain.ValidInt64{
				Value: userID,
				Valid: false,
			},
			IsShopBet: req.IsShopBet,
			CashoutID: cashoutUUID.String(),
		})
	} else {
		//  TODO if user is customer, get id from the token then get the wallet id from there and reduce the amount
		bet, err = h.betSvc.CreateBet(c.Context(), domain.CreateBet{
			Amount:      domain.ToCurrency(req.Amount),
			TotalOdds:   req.TotalOdds,
			Status:      req.Status,
			FullName:    req.FullName,
			PhoneNumber: req.PhoneNumber,

			BranchID: domain.ValidInt64{
				Value: 0,
				Valid: false,
			},
			UserID: domain.ValidInt64{
				Value: userID,
				Valid: true,
			},
			IsShopBet: req.IsShopBet,
			CashoutID: cashoutUUID.String(),
		})
	}

	if err != nil {
		h.logger.Error("CreateBetReq failed", "error", err)
		return response.WriteJSON(c, fiber.StatusInternalServerError, "Internal Server Error", err, nil)
	}

	//
	// TODO Validate Outcomes Here and make sure they didn't expire
	// Validation for creating tickets
	if len(req.Outcomes) > 30 {
		return response.WriteJSON(c, fiber.StatusBadRequest, "Too many odds/outcomes selected", nil, nil)
	}
	var outcomes []domain.CreateBetOutcome = make([]domain.CreateBetOutcome, 0, len(req.Outcomes))
	for _, outcome := range req.Outcomes {
		eventIDStr := strconv.FormatInt(outcome.EventID, 10)
		marketIDStr := strconv.FormatInt(outcome.MarketID, 10)
		oddIDStr := strconv.FormatInt(outcome.OddID, 10)
		event, err := h.eventSvc.GetUpcomingEventByID(c.Context(), eventIDStr)
		if err != nil {
			return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid event id", err, nil)
		}

		// Checking to make sure the event hasn't already started
		currentTime := time.Now()
		if event.StartTime.Before(currentTime) {
			return response.WriteJSON(c, fiber.StatusBadRequest, "The event has already expired", nil, nil)
		}

		odds, err := h.prematchSvc.GetRawOddsByMarketID(c.Context(), marketIDStr, eventIDStr)

		if err != nil {
			return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid market id", err, nil)
		}
		type rawOddType struct {
			ID       string
			Name     string
			Odds     string
			Header   string
			Handicap string
		}
		var selectedOdd rawOddType
		var isOddFound bool = false
		for _, raw := range odds.RawOdds {
			var rawOdd rawOddType
			rawBytes, err := json.Marshal(raw)
			err = json.Unmarshal(rawBytes, &rawOdd)
			if err != nil {
				h.logger.Error("Failed to unmarshal raw odd:", err)
				continue
			}
			if rawOdd.ID == oddIDStr {
				selectedOdd = rawOdd
				isOddFound = true
			}
		}

		if !isOddFound {
			return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid odd id", nil, nil)
		}

		parsedOdd, err := strconv.ParseFloat(selectedOdd.Odds, 32)

		outcomes = append(outcomes, domain.CreateBetOutcome{
			BetID:        bet.ID,
			EventID:      outcome.EventID,
			OddID:        outcome.OddID,
			MarketID:     outcome.MarketID,
			HomeTeamName: event.HomeTeam,
			AwayTeamName: event.AwayTeam,
			MarketName:   odds.MarketName,
			Odd:          float32(parsedOdd),
			OddName:      selectedOdd.Name,
			OddHeader:    selectedOdd.Header,
			OddHandicap:  selectedOdd.Handicap,
			Expires:      event.StartTime,
		})
	}

	rows, err := h.betSvc.CreateBetOutcome(c.Context(), outcomes)

	if err != nil {
		h.logger.Error("CreateBetReq failed to create outcomes", "error", err)
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Internal server error",
		})
	}

	res := convertCreateBet(bet, rows)

	return response.WriteJSON(c, fiber.StatusOK, "Bet Created", res, nil)

}

// GetAllBet godoc
// @Summary Gets all bets
// @Description Gets all the bets
// @Tags bet
// @Accept json
// @Produce json
// @Success 200 {array} BetRes
// @Failure 400 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /bet [get]
func (h *Handler) GetAllBet(c *fiber.Ctx) error {
	bets, err := h.betSvc.GetAllBets(c.Context())
	if err != nil {
		h.logger.Error("Failed to get bets", "error", err)
		return fiber.NewError(fiber.StatusInternalServerError, "Failed to retrieve bets")
	}

	res := make([]BetRes, len(bets))
	for i, bet := range bets {
		res[i] = convertBet(bet)
	}

	return response.WriteJSON(c, fiber.StatusOK, "All bets retrieved successfully", res, nil)
}

// GetBetByID godoc
// @Summary Gets bet by id
// @Description Gets a single bet by id
// @Tags bet
// @Accept json
// @Produce json
// @Param id path int true "Bet ID"
// @Success 200 {object} BetRes
// @Failure 400 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /bet/{id} [get]
func (h *Handler) GetBetByID(c *fiber.Ctx) error {
	betID := c.Params("id")
	id, err := strconv.ParseInt(betID, 10, 64)
	if err != nil {
		h.logger.Error("Invalid bet ID", "betID", betID, "error", err)
		return fiber.NewError(fiber.StatusBadRequest, "Invalid bet ID")
	}

	bet, err := h.betSvc.GetBetByID(c.Context(), id)
	if err != nil {
		h.logger.Error("Failed to get bet by ID", "betID", id, "error", err)
		return fiber.NewError(fiber.StatusInternalServerError, "Failed to retrieve bet")
	}

	res := convertBet(bet)

	return response.WriteJSON(c, fiber.StatusOK, "Bet retrieved successfully", res, nil)

}

// GetBetByCashoutID godoc
// @Summary Gets bet by cashout id
// @Description Gets a single bet by cashout id
// @Tags bet
// @Accept json
// @Produce json
// @Param id path string true "cashout ID"
// @Success 200 {object} BetRes
// @Failure 400 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /bet/cashout/{id} [get]
func (h *Handler) GetBetByCashoutID(c *fiber.Ctx) error {
	cashoutID := c.Params("id")
	// id, err := strconv.ParseInt(cashoutID, 10, 64)

	// if err != nil {
	// 	logger.Error("Invalid cashout ID", "cashoutID", cashoutID, "error", err)
	// 	return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid cashout ID", err, nil)
	// }

	bet, err := h.betSvc.GetBetByCashoutID(c.Context(), cashoutID)
	if err != nil {
		h.logger.Error("Failed to get bet by ID", "cashoutID", cashoutID, "error", err)
		return response.WriteJSON(c, fiber.StatusInternalServerError, "Failed to retrieve bet", err, nil)
	}

	res := convertBet(bet)

	return response.WriteJSON(c, fiber.StatusOK, "Bet retrieved successfully", res, nil)

}

type UpdateCashOutReq struct {
	CashedOut bool
}

// UpdateCashOut godoc
// @Summary Updates the cashed out field
// @Description Updates the cashed out field
// @Tags bet
// @Accept json
// @Produce json
// @Param id path int true "Bet ID"
// @Param updateCashOut body UpdateCashOutReq true "Updates Cashed Out"
// @Success 200 {object} response.APIResponse
// @Failure 400 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /bet/{id} [patch]
func (h *Handler) UpdateCashOut(c *fiber.Ctx) error {
	type UpdateCashOutReq struct {
		CashedOut bool `json:"cashed_out" validate:"required" example:"true"`
	}

	betID := c.Params("id")
	id, err := strconv.ParseInt(betID, 10, 64)
	if err != nil {
		h.logger.Error("Invalid bet ID", "betID", betID, "error", err)
		return fiber.NewError(fiber.StatusBadRequest, "Invalid bet ID")
	}

	var req UpdateCashOutReq
	if err := c.BodyParser(&req); err != nil {
		h.logger.Error("Failed to parse UpdateCashOut request", "error", err)
		return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request body", err, nil)
	}

	if valErrs, ok := h.validator.Validate(c, req); !ok {
		return response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", valErrs, nil)
	}

	err = h.betSvc.UpdateCashOut(c.Context(), id, req.CashedOut)
	if err != nil {
		h.logger.Error("Failed to update cash out bet", "betID", id, "error", err)
		return fiber.NewError(fiber.StatusInternalServerError, "Failed to update cash out bet")
	}

	return response.WriteJSON(c, fiber.StatusOK, "Bet updated successfully", nil, nil)
}

// DeleteBet godoc
// @Summary Deletes bet by id
// @Description Deletes bet by id
// @Tags bet
// @Accept json
// @Produce json
// @Param id path int true "Bet ID"
// @Success 200 {object} response.APIResponse
// @Failure 400 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /bet/{id} [delete]
func (h *Handler) DeleteBet(c *fiber.Ctx) error {
	betID := c.Params("id")
	id, err := strconv.ParseInt(betID, 10, 64)
	if err != nil {
		h.logger.Error("Invalid bet ID", "betID", betID, "error", err)
		return fiber.NewError(fiber.StatusBadRequest, "Invalid bet ID")
	}

	err = h.betSvc.DeleteBet(c.Context(), id)
	if err != nil {
		h.logger.Error("Failed to delete bet by ID", "betID", id, "error", err)
		return fiber.NewError(fiber.StatusInternalServerError, "Failed to delete bet")
	}

	return response.WriteJSON(c, fiber.StatusOK, "Bet removed successfully", nil, nil)
}