import {
    plainToInstance 
} from "class-transformer";
import {
    validate 
} from "class-validator";
import {
    User 
} from "../../../models/User";
import {
    RegisterInput, RegisterResult 
} from "./types";

/* const isStrongPassword = (password: string): { valid: boolean; message: string } => {
    if (password.length < 8) return { message: "Password must be at least 8 characters", valid: false };
    if (!/[A-Z]/.test(password)) return { message: "Password must contain at least 1 uppercase letter", valid: false };
    if (!/[a-z]/.test(password)) return { message: "Password must contain at least 1 lowercase letter", valid: false };
    if (!/[0-9]/.test(password)) return { message: "Password must contain at least 1 number", valid: false };
    if (!/[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]/.test(password)) return { message: "Password must contain at least 1 special character", valid: false };
    return { message: "", valid: true };
}; */

export const register = async (input: RegisterInput): Promise<RegisterResult> => {
    const dto = plainToInstance(RegisterInput, input);
    const errors = await validate(dto);

    if (errors.length > 0) {
        const message = Object.values(errors[0].constraints!)[0];
        return {
            code: 400,
            message, 
        };
    }

    const {
        companyName,
        phoneNumber,
        firstName, 
        lastName, 
        password, 
        mail 
    } = input;

    const existingUser = await User.findOne({
        mail 
    });

    if (existingUser) {
        return {
            message: "Email already in use", 
            code: 409 
        };
    }

    const existingPhone = await User.findOne({
        phoneNumber 
    });
    
    if (existingPhone) {
        return {
            message: "Phone number already in use", 
            code: 409 
        };
    }

    await User.create({
        fullName: `${firstName} ${lastName}`,
        phoneNumber,
        companyName,
        firstName,
        lastName,
        password,
        mail
    });

    return {
        message: "Registration successful",
        code: 201 
    };
};

export default register;