#include "RegisterDialog.h"
#include "UiHelpers.h"
#include "AppConfig.h"
#include "ImClient.h"
#include "Protocol.h"

#include <QJsonObject>
#include <QLabel>
#include <QLineEdit>
#include <QPointer>
#include <QPushButton>
#include <QVBoxLayout>
#include <QHBoxLayout>

RegisterDialog::RegisterDialog(QWidget *parent)
    : QWidget(parent)
{
    auto *lay = new QVBoxLayout(this);
    lay->setContentsMargins(36, 22, 36, 24);
    lay->setSpacing(10);

    m_nickname = UiHelpers::lineEdit(QStringLiteral("昵称"), this);
    m_account = UiHelpers::lineEdit(QStringLiteral("账号"), this);
    m_phone = UiHelpers::lineEdit(QStringLiteral("手机号"), this);

    auto *codeRow = new QHBoxLayout();
    codeRow->setSpacing(8);
    m_code = UiHelpers::lineEdit(QStringLiteral("验证码"), this);
    m_getCode = UiHelpers::ghostButton(QStringLiteral("获取验证码"), this);
    m_getCode->setFixedWidth(108);
    m_getCode->setFixedHeight(36);
    codeRow->addWidget(m_code, 1);
    codeRow->addWidget(m_getCode);

    m_password = UiHelpers::passwordEdit(QStringLiteral("密码"), this);
    m_confirm = UiHelpers::passwordEdit(QStringLiteral("确认密码"), this);
    m_error = UiHelpers::errorLabel(this);

    m_submit = UiHelpers::primaryButton(QStringLiteral("注 册"), this);
    m_submit->setMinimumWidth(0);

    auto *back = UiHelpers::linkButton(QStringLiteral("已有账号，去登录"), this);

    lay->addWidget(m_nickname);
    lay->addWidget(m_account);
    lay->addWidget(m_phone);
    lay->addLayout(codeRow);
    lay->addWidget(m_password);
    lay->addWidget(m_confirm);
    lay->addWidget(m_error);
    lay->addSpacing(4);
    lay->addWidget(m_submit);
    lay->addWidget(back, 0, Qt::AlignHCenter);
    lay->addStretch();

    applyLimits();

    connect(m_getCode, &QPushButton::clicked, this, &RegisterDialog::onGetCode);
    connect(m_submit, &QPushButton::clicked, this, &RegisterDialog::onSubmit);
    connect(back, &QPushButton::clicked, this, &RegisterDialog::backRequested);
}

QString RegisterDialog::account() const
{
    return m_account->text().trimmed();
}

QString RegisterDialog::nickname() const
{
    return m_nickname->text().trimmed();
}

void RegisterDialog::applyLimits()
{
    const auto &cfg = AppConfig::instance();
    if (m_nickname)
        m_nickname->setMaxLength(cfg.nicknameMax());
    if (m_account)
    {
        m_account->setPlaceholderText(
            QStringLiteral("账号（%1-%2 位字母或数字）").arg(cfg.accountMin()).arg(cfg.accountMax()));
        m_account->setMaxLength(cfg.accountMax());
    }
    if (m_phone)
        m_phone->setMaxLength(cfg.phoneLen());
    if (m_code)
        m_code->setMaxLength(cfg.codeLen());
    if (m_password)
    {
        m_password->setPlaceholderText(
            QStringLiteral("密码（%1-%2 位）").arg(cfg.passwordMin()).arg(cfg.passwordMax()));
        m_password->setMaxLength(cfg.passwordMax());
    }
    if (m_confirm)
        m_confirm->setMaxLength(cfg.passwordMax());
}

void RegisterDialog::resetForm()
{
    m_uid = 0;
    m_nickname->clear();
    m_account->clear();
    m_phone->clear();
    m_code->clear();
    m_password->clear();
    m_confirm->clear();
    UiHelpers::setError(m_error, QString());
    setBusy(false);
    m_nickname->setFocus();
}

void RegisterDialog::setBusy(bool on)
{
    m_getCode->setEnabled(!on);
    m_submit->setEnabled(!on);
}

void RegisterDialog::onGetCode()
{
    const auto &cfg = AppConfig::instance();
    const QString phone = m_phone->text().trimmed();
    if (!cfg.validPhone(phone))
    {
        UiHelpers::setError(m_error, QStringLiteral("请填写正确的手机号"));
        return;
    }
    UiHelpers::setError(m_error, QString());
    setBusy(true);
    QPointer<RegisterDialog> self(this);
    ImClient::instance().sendCode(phone, QStringLiteral("register"), [self](const QJsonObject &reply) {
        if (!self)
            return;
        self->setBusy(false);
        if (!ImClient::ok(reply))
        {
            UiHelpers::setError(self->m_error, ImClient::messageOf(reply));
            return;
        }
        const QString sms = reply.value(QStringLiteral("sms_code")).toString();
        if (!sms.isEmpty())
            self->m_code->setText(sms);
        UiHelpers::setError(self->m_error, QString());
        UiHelpers::showToast(self->window(), QStringLiteral("验证码已发送"));
    });
}

void RegisterDialog::onSubmit()
{
    const auto &cfg = AppConfig::instance();
    const QString nickname = m_nickname->text().trimmed();
    const QString account = m_account->text().trimmed();
    const QString phone = m_phone->text().trimmed();
    const QString code = m_code->text().trimmed();
    const QString password = m_password->text();

    if (nickname.isEmpty() || account.isEmpty() || phone.isEmpty()
        || code.isEmpty() || password.isEmpty())
    {
        UiHelpers::setError(m_error, QStringLiteral("请完整填写注册信息"));
        return;
    }
    if (!cfg.validNickname(nickname))
    {
        UiHelpers::setError(m_error, QStringLiteral("昵称过长"));
        return;
    }
    if (!cfg.validAccount(account))
    {
        UiHelpers::setError(m_error,
            QStringLiteral("账号须为 %1-%2 位字母或数字").arg(cfg.accountMin()).arg(cfg.accountMax()));
        return;
    }
    if (!cfg.validPhone(phone))
    {
        UiHelpers::setError(m_error, QStringLiteral("请填写正确的手机号"));
        return;
    }
    if (!cfg.validPassword(password))
    {
        UiHelpers::setError(m_error,
            QStringLiteral("密码须为 %1-%2 位").arg(cfg.passwordMin()).arg(cfg.passwordMax()));
        return;
    }
    if (password != m_confirm->text())
    {
        UiHelpers::setError(m_error, QStringLiteral("两次输入的密码不一致"));
        return;
    }

    UiHelpers::setError(m_error, QString());
    setBusy(true);
    QPointer<RegisterDialog> self(this);
    ImClient::instance().registerUser(nickname, account, phone, code, password,
        [self](const QJsonObject &reply) {
            if (!self)
                return;
            self->setBusy(false);
            if (!ImClient::ok(reply))
            {
                UiHelpers::setError(self->m_error, ImClient::messageOf(reply));
                return;
            }
            self->m_uid = Proto::jsonI64(reply, QStringLiteral("uid"));
            emit self->submitted(self->m_uid);
        });
}