// 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 (
	"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 login
// @description Login to 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 | InvalidUsername | InvalidPassword"
// @failure 500 {object} models.Error "InternalServerError"
// @router /v1/account/login [post]
func Login(ctx *context.Context) {
	// Store body
	var body *v1.Register

	// Bind JSON
	err := ctx.BindJSON(&body)
	if err != nil {
		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
	}

	// Compare username
	if account.Username != body.Username {
		ctx.JSON(400, ctx.Error("InvalidUsername"))
		return
	}

	// Compare password
	err = bcrypt.CompareHashAndPassword([]byte(account.Password), []byte(body.Password))
	if err != nil {
		ctx.JSON(400, ctx.Error("InvalidPassword"))
		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))
}