package api

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

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

type createUserRequest struct {
	Username string `json:"username" binding:"required,alphanum"`
	Password string `json:"password" binding:"required,min=7"`
}

type createUserResponse struct {
	ID            int32        `json:"id"`
	Username      string       `json:"username"`
	AvatarPicture string       `json:"avatar_picture"` // avatar_url
	BannedAt      sql.NullTime `json:"banned_at"`
	BannedUntil   sql.NullTime `json:"banned_until"`
	BanReason     string       `json:"ban_reason"`
	IsPermaban    bool         `json:"is_permaban"`
	IsAdmin       bool         `json:"is_admin"`
	IsCritics     bool         `json:"is_critics"`
	IsVerified    bool         `json:"is_verified"`
	CreatedAt     time.Time    `json:"created_at"`
	UpdatedAt     time.Time    `json:"updated_at"`
}

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

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

	arg := db.CreateUserParams{
		Username: req.Username,
		Password: hashedPassword,
	}

	user, err := server.Store.CreateUser(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, "Username already used"))
				return
			}
		}

		ctx.JSON(http.StatusInternalServerError, ErrorResponse(err, "Something went wrong"))
		return
	}

	accessToken, _, err := server.TokenMaker.CreateToken(
		user.Username,
		int(user.ID),
		server.Config.TokenDuration,
	)

	if err != nil {
		ctx.JSON(http.StatusInternalServerError, ErrorResponse(err, "Something went wrong while creating token"))
		return
	}

	// refreshToken, refreshTokenPayload, err := server.TokenMaker.CreateToken(
	// 	user.Username,
	// 	int(user.ID),
	// 	server.Config.RefreshTokenDuration,
	// )

	_, err = server.Store.CreateSession(ctx, db.CreateSessionParams{
		Username: user.Username,
		// RefreshToken: refreshToken,
		UserAgent: ctx.Request.UserAgent(),
		ClientIp:  ctx.ClientIP(),
		IsBlocked: false,
		// ExpiresAt:    refreshTokenPayload.ExpiredAt,
	})

	if err != nil {
		ctx.JSON(http.StatusInternalServerError, ErrorResponse(err, "Something went wrong while saving sessions"))
		return
	}

	res := createUserResponse{
		ID:            user.ID,
		Username:      user.Username,
		AvatarPicture: user.AvatarPicture.String,
		BannedAt:      sql.NullTime{Valid: user.BannedAt.Valid, Time: user.BannedAt.Time},
		BannedUntil:   sql.NullTime{Valid: user.BannedUntil.Valid, Time: user.BannedUntil.Time},
		BanReason:     user.BanReason.String,
		IsPermaban:    user.IsPermaban.Bool,
		IsAdmin:       user.IsAdmin.Bool,
		IsCritics:     user.IsCritics.Bool,
		IsVerified:    user.IsVerified.Bool,
		CreatedAt:     user.CreatedAt.Time,
		UpdatedAt:     user.UpdatedAt.Time,
	}

	ctx.SetCookie(
		"paseto",
		accessToken,
		int(server.Config.CookieDuration),
		"/",
		"localhost",
		false,
		false,
	)

	ctx.JSON(http.StatusOK, res)
}

func (server *Server) login(ctx *gin.Context) {
	var req createUserRequest

	if err := ctx.ShouldBindJSON(&req); err != nil {
		ctx.JSON(http.StatusBadRequest, ValidationErrorResponse(err))
		return
	}

	user, err := server.Store.GetUser(ctx, req.Username)
	if err != nil {
		if err == sql.ErrNoRows {
			ctx.JSON(http.StatusNotFound, ErrorResponse(err, ""))
			return
		}
		ctx.JSON(http.StatusInternalServerError, ErrorResponse(err, "Something went wrong whlie try to get user"))
		return
	}

	err = util.CheckPassword(req.Password, user.Password)
	if err != nil {
		ctx.JSON(http.StatusUnauthorized, ErrorResponse(err, "Password not match"))
		return
	}

	accessToken, _, err := server.TokenMaker.CreateToken(user.Username, int(user.ID), server.Config.TokenDuration)

	if err != nil {
		ctx.JSON(http.StatusInternalServerError, "Something went wrong while try to create token")
		return
	}

	_, err = server.Store.CreateSession(ctx, db.CreateSessionParams{
		Username:  user.Username,
		UserAgent: ctx.Request.UserAgent(),
		ClientIp:  ctx.ClientIP(),
		IsBlocked: false,
	})

	if err != nil {
		ctx.JSON(http.StatusInternalServerError, ErrorResponse(err, "Something went wrong while try to create session"))
		return
	}

	ctx.SetCookie(
		"paseto",
		accessToken,
		int(server.Config.CookieDuration),
		"/",
		"localhost",
		false,
		false,
	)
	ctx.JSON(http.StatusOK, user)
}

func (server *Server) logout(ctx *gin.Context) {
	ctx.SetCookie(
		"paseto",
		"",
		-1,
		"/",
		"",
		false,
		true,
	)
	ctx.Writer.WriteHeader(http.StatusNoContent)
}