package handlers

import (
	"errors"
	"log/slog"

	"github.com/SamuelTariku/FortuneBet-Backend/internal/services/authentication"
	jwtutil "github.com/SamuelTariku/FortuneBet-Backend/internal/web_server/jwt"
	"github.com/SamuelTariku/FortuneBet-Backend/internal/web_server/response"
	customvalidator "github.com/SamuelTariku/FortuneBet-Backend/internal/web_server/validator"
	"github.com/gofiber/fiber/v2"
)

type loginCustomerReq struct {
	Email       string `json:"email" example:"john.doe@example.com"`
	PhoneNumber string `json:"phone_number" example:"1234567890"`
	Password    string `json:"password" example:"password123"`
}

type loginCustomerRes struct {
	AccessToken  string `json:"access_token"`
	RefreshToken string `json:"refresh_token"`
	Role         string `json:"role"`
}

// LoginCustomer godoc
// @Summary Login customer
// @Description Login customer
// @Tags auth
// @Accept json
// @Produce json
// @Param login body loginCustomerReq true "Login customer"
// @Success 200 {object} loginCustomerRes
// @Failure 400 {object} response.APIResponse
// @Failure 401 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /auth/login [post]
func LoginCustomer(
	logger *slog.Logger, authSvc *authentication.Service,
	validator *customvalidator.CustomValidator, JwtConfig jwtutil.JwtConfig) fiber.Handler {
	return func(c *fiber.Ctx) error {
		var req loginCustomerReq
		if err := c.BodyParser(&req); err != nil {
			logger.Error("Login failed", "error", err)
			response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", nil, nil)
		}
		valErrs, ok := validator.Validate(c, req)
		if !ok {

			response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", valErrs, nil)
			return nil
		}
		successRes, err := authSvc.Login(c.Context(), req.Email, req.PhoneNumber, req.Password)
		if err != nil {
			logger.Info("Login failed", "error", err)
			if errors.Is(err, authentication.ErrInvalidPassword) {
				response.WriteJSON(c, fiber.StatusUnauthorized, "Invalid password or not registered", nil, nil)
				return nil
			}
			if errors.Is(err, authentication.ErrUserNotFound) {
				response.WriteJSON(c, fiber.StatusUnauthorized, "Invalid password or not registered", nil, nil)
				return nil
			}
			logger.Error("Login failed", "error", err)
			response.WriteJSON(c, fiber.StatusInternalServerError, "Internal server error", nil, nil)
			return nil

		}
		accessToken, err := jwtutil.CreateJwt(successRes.UserId, successRes.Role, JwtConfig.JwtAccessKey, JwtConfig.JwtAccessExpiry)
		res := loginCustomerRes{
			AccessToken:  accessToken,
			RefreshToken: successRes.RfToken,
			Role:         string(successRes.Role),
		}
		return response.WriteJSON(c, fiber.StatusOK, "Login successful", res, nil)
	}
}

type refreshToken struct {
	AccessToken  string `json:"access_token"`
	RefreshToken string `json:"refresh_token"`
}

// RefreshToken godoc
// @Summary Refresh token
// @Description Refresh token
// @Tags auth
// @Accept json
// @Produce json
// @Param refresh body refreshToken true "tokens"
// @Success 200 {object} loginCustomerRes
// @Failure 400 {object} response.APIResponse
// @Failure 401 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /auth/refresh [post]
func RefreshToken(logger *slog.Logger, authSvc *authentication.Service,
	validator *customvalidator.CustomValidator, JwtConfig jwtutil.JwtConfig) fiber.Handler {
	return func(c *fiber.Ctx) error {
		var req refreshToken
		if err := c.BodyParser(&req); err != nil {
			response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", nil, nil)
		}
		valErrs, ok := validator.Validate(c, req)
		if !ok {
			response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", valErrs, nil)
			return nil
		}
		rf, err := authSvc.RefreshToken(c.Context(), req.RefreshToken)
		if err != nil {
			logger.Info("Refresh token failed", "error", err)
			if errors.Is(err, authentication.ErrExpiredToken) {
				response.WriteJSON(c, fiber.StatusUnauthorized, "The refresh token has expired", nil, nil)
				return nil
			}
			if errors.Is(err, authentication.ErrRefreshTokenNotFound) {
				response.WriteJSON(c, fiber.StatusUnauthorized, "Refresh token not found", nil, nil)
				return nil
			}
			logger.Error("Refresh token failed", "error", err)
			response.WriteJSON(c, fiber.StatusInternalServerError, "Internal server error", nil, nil)
			return nil
		}
		accessToken, err := jwtutil.CreateJwt(0, "", JwtConfig.JwtAccessKey, JwtConfig.JwtAccessExpiry)
		if err != nil {
			logger.Error("Create jwt failed", "error", err)
			response.WriteJSON(c, fiber.StatusInternalServerError, "Internal server error", nil, nil)
			return nil
		}

		res := loginCustomerRes{
			AccessToken:  accessToken,
			RefreshToken: rf,
		}
		return response.WriteJSON(c, fiber.StatusOK, "refresh successful", res, nil)
	}
}

type logoutReq struct {
	RefreshToken string `json:"refresh_token"`
}

// LogOutCustomer godoc
// @Summary Logout customer
// @Description Logout customer
// @Tags auth
// @Accept json
// @Produce json
// @Param logout body logoutReq true "Logout customer"
// @Success 200 {object} response.APIResponse
// @Failure 400 {object} response.APIResponse
// @Failure 401 {object} response.APIResponse
// @Failure 500 {object} response.APIResponse
// @Router /auth/logout [post]
func LogOutCustomer(
	logger *slog.Logger, authSvc *authentication.Service,
	validator *customvalidator.CustomValidator) fiber.Handler {
	return func(c *fiber.Ctx) error {
		var req logoutReq
		if err := c.BodyParser(&req); err != nil {
			response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", nil, nil)
		}
		valErrs, ok := validator.Validate(c, req)
		if !ok {
			response.WriteJSON(c, fiber.StatusBadRequest, "Invalid request", valErrs, nil)
			return nil
		}
		err := authSvc.Logout(c.Context(), req.RefreshToken)
		if err != nil {
			logger.Info("Logout failed", "error", err)
			if errors.Is(err, authentication.ErrExpiredToken) {
				response.WriteJSON(c, fiber.StatusUnauthorized, "The refresh token has expired", nil, nil)
				return nil
			}
			if errors.Is(err, authentication.ErrRefreshTokenNotFound) {
				response.WriteJSON(c, fiber.StatusUnauthorized, "Refresh token not found", nil, nil)
				return nil
			}
			logger.Error("Logout failed", "error", err)
			response.WriteJSON(c, fiber.StatusInternalServerError, "Internal server error", nil, nil)
			return nil
		}
		return response.WriteJSON(c, fiber.StatusOK, "Logout successful", nil, nil)
	}
}