// Copyright 2024 perp (supernets)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package account

import (
	"fmt"

	"git.supernets.org/perp/gopay/internal/context"
	"git.supernets.org/perp/gopay/internal/jwt"
	v1 "git.supernets.org/perp/gopay/internal/models/v1"
	"golang.org/x/crypto/bcrypt"
)

// @summary Account registration
// @description Register an account
// @tags account
// @accept json
// @produce json
// @param register body v1.Register true "alice" "supersecretpassword"
// @success 200 {object} models.Token
// @failure 400 {object} models.Error "MissingBody | UsernameTaken"
// @failure 403 {object} models.Error "RegistrationDisabled"
// @failure 500 {object} models.Error "InternalServerError"
// @router /v1/account/register [post]
func Register(ctx *context.Context) {
	// Check if registration is disabled
	if ctx.Config.Auth.Disabled {
		ctx.JSON(403, ctx.Error("RegistrationDisabled"))
		return
	}

	// Store body
	var body *v1.Register

	// Bind JSON
	err := ctx.BindJSON(&body)
	if err != nil {
		fmt.Println(err)
		ctx.JSON(400, ctx.Error("MissingBody"))
		return
	}

	// Select account by username
	account, err := ctx.Db.Account.SelectByUsername(body.Username)
	if err != nil {
		ctx.JSON(500, ctx.Error("InternalServerError"))
		return
	}

	// Account exists
	if account.Username != "" {
		ctx.JSON(400, ctx.Error("UsernameTaken"))
		return
	}

	// Hash password
	password, err := bcrypt.GenerateFromPassword([]byte(body.Password), ctx.Config.Auth.Cost)
	if err != nil {
		ctx.JSON(500, ctx.Error("InternalServerError"))
		return
	}

	// Insert account
	err = ctx.Db.Account.Insert(body.Username, string(password))
	if err != nil {
		ctx.JSON(500, ctx.Error("InternalServerError"))
		return
	}

	// Select account by username
	account, err = ctx.Db.Account.SelectByUsername(body.Username)
	if err != nil {
		ctx.JSON(500, ctx.Error("InternalServerError"))
		return
	}

	// Generate token
	token, err := jwt.Encode(account.ID)
	if err != nil {
		ctx.JSON(500, ctx.Error("InternalServerError"))
		return
	}

	ctx.JSON(200, ctx.Token(token))
}