/*
ScheduleTogether Backend
Copyright (C) 2024, Zervó Zadachin

DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License version 3 for more details.

This program incorporates external libraries for certain functionalities.
These libraries are covered by their respective licenses, and their usage
agreements are as outlined in their respective documentation or source
code.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package accounts

import (
	"github.com/kataras/iris/v12"

	db "git.zervo.org/scheduletogether/backend/internal/database"
	"git.zervo.org/scheduletogether/backend/pkg/types"
)

// AccountVerify_Service verifies an account
func AccountVerify_Service(ctx iris.Context, req types.AccountVerifyRequest) {
	// Start a transaction
	tx := db.Db.Begin()

	// Search for UUID in pending register verification table
	var registerVerificationRecord db.RegisterVerification
	err := tx.Model(&db.RegisterVerification{}).Where("uuid = ?", req.Uuid).First(&registerVerificationRecord).Error

	if err != nil {
		tx.Rollback()
		ctx.StatusCode(iris.StatusBadRequest)
		ctx.JSON(types.CommonErrorResponse{
			Error: "Invalid UUID or verification token",
		})
		return
	}

	// Check if provided token matches token in DB
	if registerVerificationRecord.Token != req.Token {
		ctx.StatusCode(iris.StatusBadRequest)
		ctx.JSON(types.CommonErrorResponse{
			Error: "Invalid verification token",
		})
		return
	}

	// Delete the record once verified
	err = tx.Delete(&registerVerificationRecord).Error
	if err != nil {
		tx.Rollback()
		ctx.StatusCode(iris.StatusInternalServerError)
		ctx.JSON(types.CommonErrorResponse{
			Error: "Something went wrong, please try again",
		})
		logboi.Warn("Failed to delete register verification record: " + err.Error())
		return
	}

	// Update user record in database
	var userRecord db.User
	err = tx.Model(&db.User{}).Where("uuid = ?", req.Uuid).Update("verified", true).First(&userRecord).Error
	if err != nil {
		tx.Rollback()
		ctx.StatusCode(iris.StatusInternalServerError)
		ctx.JSON(types.CommonErrorResponse{
			Error: "Something went wrong, please try again",
		})
		logboi.Warn("Failed to update user record: " + err.Error())
		return
	}

	// Commit the transaction if everything is successful
	err = tx.Commit().Error
	if err != nil {
		ctx.StatusCode(iris.StatusInternalServerError)
		ctx.JSON(types.CommonErrorResponse{
			Error: "Something went wrong, please try again",
		})
		logboi.Err("Failed to commit transaction: " + err.Error())
		return
	}

	logboi.Info("Verified user with UUID: " + req.Uuid)
	ctx.JSON(types.CommonMessageResponse{
		Message: "Account verified",
	})
}