package api

import (
	"database/sql"
	"net/http"
	"time"

	db "git.nochill.in/nochill/naice_pos/db/sqlc"
	"git.nochill.in/nochill/naice_pos/util"
	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
	"github.com/lib/pq"
)

type createUserMerchantRequest struct {
	Email      string `json:"email" binding:"required,email"`
	Fullname   string `json:"fullname" binding:"required,alphanum"`
	Password   string `json:"password" binding:"required"`
	OutletName string `json:"outlet_name" binding:"required"`
}

type userMerchantResponse struct {
	ID            uuid.UUID    `json:"id"`
	IndexID       int64        `json:"index_id"`
	Email         string       `json:"email"`
	Fullname      string       `json:"fullname"`
	CreatedAt     sql.NullTime `json:"created_at"`
	UpdatedAt     sql.NullTime `json:"updated_at"`
	OutletID      uuid.UUID    `json:"outlet_id"`
	OutletIndexID int64        `json:"outlet_index_id"`
	OutletName    string       `json:"outlet_name"`
	OutletOwnerID uuid.UUID    `json:"outlet_owner_id"`
}

func newUserMerchantResponse(user db.GetUserByEmailRow) userMerchantResponse {
	return userMerchantResponse{
		ID:            user.ID,
		IndexID:       user.IndexID,
		Email:         user.Email,
		Fullname:      user.Fullname,
		CreatedAt:     sql.NullTime{Valid: true, Time: user.CreatedAt.Time},
		UpdatedAt:     sql.NullTime{Valid: true, Time: user.UpdatedAt.Time},
		OutletID:      user.ID_2,
		OutletIndexID: user.IndexID_2,
		OutletName:    user.Name,
		OutletOwnerID: user.OwnerID,
	}
}

func (server *Server) createUserMerchant(ctx *gin.Context) {
	var req createUserMerchantRequest
	if err := ctx.ShouldBindJSON(&req); err != nil {
		ctx.JSON(http.StatusBadRequest, errorResponse(err, ""))
		return
	}

	hashedPassword, err := util.HashPassword(req.Password)
	if err != nil {
		ctx.JSON(http.StatusInternalServerError, errorResponse(err, ""))
		return
	}

	arg := db.UserMerchantTxParams{
		Email:      req.Email,
		Fullname:   req.Fullname,
		Password:   hashedPassword,
		OutletName: req.OutletName,
	}

	user, err := server.store.CreateUserMerchantTx(ctx, arg)
	if err != nil {
		if pqErr, ok := err.(*pq.Error); ok {
			switch pqErr.Code.Name() {
			case "foreign_key_violation", "unique_violation":
				ctx.JSON(http.StatusConflict, errorResponse(err, ""))
				return
			}
		}
		ctx.JSON(http.StatusInternalServerError, errorResponse(err, ""))
		return
	}

	res := userMerchantResponse{
		ID:            user.OwnerProfile.ID,
		IndexID:       user.OwnerProfile.IndexID,
		Email:         user.OwnerProfile.Email,
		Fullname:      user.OwnerProfile.Fullname,
		CreatedAt:     sql.NullTime{Valid: true, Time: user.OwnerProfile.CreatedAt.Time},
		UpdatedAt:     sql.NullTime{Valid: true, Time: user.OwnerProfile.UpdatedAt.Time},
		OutletID:      user.OutletProfile.ID,
		OutletIndexID: user.OutletProfile.IndexID,
		OutletName:    user.OutletProfile.Name,
		OutletOwnerID: user.OutletProfile.OwnerID,
	}

	ctx.JSON(http.StatusOK, res)
}

type userLoginRequest struct {
	Email    string `json:"email" binding:"required,email"`
	Password string `json:"password" binding:"required"`
}

type userTokenResponse struct {
	SessionID             uuid.UUID `json:"session_id"`
	AccesToken            string    `json:"access_token"`
	AccessTokenExpiresAt  time.Time `json:"access_token_expires_at"`
	RefreshToken          string    `json:"refresh_token"`
	RefreshTokenExpiresAt time.Time `json:"refresh_token_expires_at"`
}

type userLoginResponse struct {
	UserTokenResponse    userTokenResponse    `json:"user_token"`
	UserMerchantResponse userMerchantResponse `json:"user"`
}

func (server *Server) loginUser(ctx *gin.Context) {
	var req userLoginRequest
	if err := ctx.ShouldBindJSON(&req); err != nil {
		ctx.JSON(http.StatusBadRequest, errorResponse(err, ""))
		return
	}

	user, err := server.store.GetUserByEmail(ctx, req.Email)
	if err != nil {
		if err == sql.ErrNoRows {
			ctx.JSON(http.StatusNotFound, errorResponse(err, ""))
			return
		}
		ctx.JSON(http.StatusInternalServerError, errorResponse(err, ""))
		return
	}

	err = util.CheckPassword(req.Password, user.Password)
	if err != nil {
		ctx.JSON(http.StatusUnauthorized, errorResponse(err, ""))
		return
	}

	accessToken, accessPayload, err := server.tokenMaker.CreateToken(
		user.Email,
		user.ID_2.String(),
		server.config.TokenDuration,
	)

	if err != nil {
		ctx.JSON(http.StatusInternalServerError, errorResponse(err, ""))
		return
	}

	refreshToken, refreshTokenPayload, err := server.tokenMaker.CreateToken(
		user.Email,
		user.ID_2.String(),
		server.config.RefreshTokenDuration,
	)

	session, err := server.store.CreateSession(ctx, db.CreateSessionParams{
		ID:           refreshTokenPayload.ID,
		Email:        user.Email,
		RefreshToken: refreshToken,
		UserAgent:    ctx.Request.UserAgent(),
		ClientIp:     ctx.ClientIP(),
		IsBlocked:    false,
		ExpiresAt:    refreshTokenPayload.ExpiredAt,
	})

	if err != nil {
		ctx.JSON(http.StatusInternalServerError, errorResponse(err, ""))
		return
	}

	tokenResponse := userTokenResponse{
		SessionID:             session.ID,
		AccesToken:            accessToken,
		AccessTokenExpiresAt:  accessPayload.ExpiredAt,
		RefreshToken:          refreshToken,
		RefreshTokenExpiresAt: refreshTokenPayload.ExpiredAt,
	}

	res := BaseApiRespond("succes", userLoginResponse{
		UserTokenResponse:    tokenResponse,
		UserMerchantResponse: newUserMerchantResponse(user),
	})

	ctx.JSON(http.StatusOK, res)
}