package user

import (
	"context"
	"errors"
	"fmt"
	"log/slog"
	"net/mail"
	"strings"

	"gitserver.in/patialtech/rano/db"
	"gitserver.in/patialtech/rano/mailer"
	"gitserver.in/patialtech/rano/mailer/message"
	"gitserver.in/patialtech/rano/util/crypto"
	"gitserver.in/patialtech/rano/util/logger"
	"gitserver.in/patialtech/rano/util/validate"
)

type CreateInput struct {
	Email      string `validate:"email"`
	Phone      string
	Pwd        string `validate:"required"`
	ConfirmPwd string `validate:"required"`
	FirstName  string `validate:"required"`
	MiddleName string
	LastName   string
	RoleID     uint8 `validate:"required"`
}

var (
	ErrCreateInpNil    = errors.New("user: create input is nil")
	ErrWrongConfirmPwd = errors.New("user: confirm password does not match")
)

// Create user record in DB
//
// will return created userID on success
func Create(ctx context.Context, inp *CreateInput) (int64, error) {
	// check for nil inp
	if inp == nil {
		return 0, ErrCreateInpNil
	}

	// validate
	if err := validate.Struct(inp); err != nil {
		return 0, err
	}

	// compare pwd and comparePwd
	if inp.Pwd != inp.ConfirmPwd {
		return 0, ErrWrongConfirmPwd
	}

	h, salt, err := crypto.PasswordHash(inp.Pwd)
	if err != nil {
		return 0, err
	}

	// save record to DB
	client := db.Client()
	u, err := client.User.Create().
		SetEmail(inp.Email).
		SetPwdHash(h).
		SetPwdSalt(salt).
		SetFirstName(inp.FirstName).
		SetMiddleName(inp.MiddleName).
		SetLastName(inp.LastName).
		Save(ctx)
	if err != nil {
		logger.Error(err, slog.String("ref", "user: create error"))
		return 0, errors.New("failed to create user")
	}

	// email
	err = mailer.Send(
		[]mail.Address{
			{Name: inp.FullName(), Address: inp.Email},
		},
		&message.Welcome{
			Name: inp.FullName(),
		},
	)
	if err != nil {
		logger.Error(err, slog.String("ref", "user: send welcome email"))
	}

	return u.ID, nil
}

func (inp *CreateInput) FullName() string {
	if inp == nil {
		return ""
	}

	name := fmt.Sprintf("%s %s %s", inp.FirstName, inp.MiddleName, inp.LastName)
	return strings.Join(strings.Fields(name), " ")
}