<?php

namespace IQBall\Core\Gateway;

use IQBall\Core\Connection;
use IQBall\Core\Data\Account;
use IQBall\Core\Data\User;
use PDO;

class AccountGateway {
    private Connection $con;

    /**
     * @param Connection $con
     */
    public function __construct(Connection $con) {
        $this->con = $con;
    }

    public function insertAccount(string $name, string $email, string $token, string $hash, string $profilePicture): int {
        $this->con->exec("INSERT INTO Account(username, hash, email, token,profilePicture) VALUES (:username,:hash,:email,:token,:profilePic)", [
            ':username' => [$name, PDO::PARAM_STR],
            ':hash' => [$hash, PDO::PARAM_STR],
            ':email' => [$email, PDO::PARAM_STR],
            ':token' => [$token, PDO::PARAM_STR],
            ':profilePic' => [$profilePicture, PDO::PARAM_STR],
        ]);
        return intval($this->con->lastInsertId());
    }

    /**
     * @param string $email
     * @return array<string, mixed>|null
     */
    private function getRowsFromMail(string $email): ?array {
        return $this->con->fetch("SELECT * FROM Account WHERE email = :email", [':email' => [$email, PDO::PARAM_STR]])[0] ?? null;
    }

    /**
     * @param int $id
     * @return array<string, mixed>|null
     */
    private function getRowsFromId(int $id): ?array {
        return $this->con->fetch("SELECT * FROM Account WHERE id = :id", [':id' => [$id, PDO::PARAM_INT]])[0] ?? null;
    }

    /**
     * @param string $email
     * @return string|null the hashed user's password, or null if the given mail does not exist
     */
    public function getHash(string $email): ?string {
        $results = $this->getRowsFromMail($email);
        if ($results == null) {
            return null;
        }
        return $results['hash'];
    }

    /**
     * @param string $email
     * @return bool true if the given email exists in the database
     */
    public function exists(string $email): bool {
        return $this->getRowsFromMail($email) != null;
    }

    /**
     * @param string $email
     * @return Account|null
     */
    public function getAccountFromMail(string $email): ?Account {
        $acc = $this->getRowsFromMail($email);
        if (empty($acc)) {
            return null;
        }

        return new Account($acc["token"], new User($email, $acc["username"], $acc["id"], $acc["profilePicture"]));
    }

    /**
     * @param int $id
     * @return Account|null
     */
    public function getAccountFromId(int $id): ?Account {
        $acc = $this->getRowsFromId($id);
        if (empty($acc)) {
            return null;
        }

        return new Account($acc["token"], new User($acc["email"], $acc["username"], $id, $acc["profilePicture"]));
    }

    /**
     * @param string $token get an account from given token
     * @return Account|null
     */
    public function getAccountFromToken(string $token): ?Account {
        $acc = $this->con->fetch("SELECT * FROM Account WHERE token = :token", [':token' => [$token, PDO::PARAM_STR]])[0] ?? null;
        if (empty($acc)) {
            return null;
        }

        return new Account($acc["token"], new User($acc["email"], $acc["username"], $acc["id"], $acc["profilePicture"]));
    }

    public function updateProfile(string $name, string $email, int $id) : void {
        $this->con->exec("
            UPDATE Account 
            SET email = :email AND username = :username
            WHERE id = :id
        ", [
            ':username' => [$name, PDO::PARAM_STR],
            ':email' => [$email, PDO::PARAM_STR],
            ':id' => [$id, PDO::PARAM_INT]
        ]);
    }

    public function nameIsDifferent(int $id, string $name) : bool {
        $nameExist = $this->con->fetch("SELECT username FROM Account WHERE id = :id", [':id' => [$id, PDO::PARAM_STR]]) ?? null;
        
        if (!empty($nameExist)) {
            if ($name != $nameExist[0]["username"]) {
                return true;
            }
        } 
        return false;
    }

    public function emailIsDifferent(int $id, string $email) : bool {
        $emailExist = $this->con->fetch("SELECT email FROM Account WHERE id = :id", [':id' => [$id, PDO::PARAM_STR]]) ?? null;
        
        if (!empty($emailExist)) {
            if ($email != $emailExist[0]["email"]) {
                return true;
            }
        } 
        return false;
    }

    public function emailExist(string $email) {
        $res = $this->con->fetch("SELECT email FROM Account WHERE email = :email", [':email' => [$email, PDO::PARAM_STR]]) ?? null;        
        return $res != null;
    }

    public function changeName(int $id, string $newName) {
        $this->con->exec("
            UPDATE Account
            SET username  = :username
            WHERE id = :id
        ", [
            ':username' => [$newName, PDO::PARAM_STR],
            ':id' => [$id, PDO::PARAM_STR]
        ]);
    }

    public function changeEmail(int $id, string $newEmail) {
        $this->con->exec("
            UPDATE Account
            SET email  = :email
            WHERE id = :id
        ", [
            ':email' => [$newEmail, PDO::PARAM_STR],
            ':id' => [$id, PDO::PARAM_STR]
        ]);
    }

    public function changePicture(int $id, string $newLien) {
        error_log($newLien);
        $this->con->exec("
            UPDATE Account
            SET profilePicture  = :lien
            WHERE id = :id
        ", [
            ':lien' => [$newLien, PDO::PARAM_STR],
            ':id' => [$id, PDO::PARAM_STR]
        ]);
    }
}