#include "UpdateLogic.h"
#include "ConfigHelper.h"
#include <QDebug>
#include <QJsonArray>
#include <QApplication>
#include "PolicyHelper.h"
#include "LocalStateHelper.h"

UpdateLogic::UpdateLogic(QObject* parent)
    : QObject(parent)
{
    ConfigHelper& cfg = ConfigHelper::instance();
    m_serverAddr = cfg.getValue("Server", "api_base_url");
    m_appId = cfg.getValue("App", "app_id");
    m_curVer = cfg.getValue("App", "current_version");
    m_channel = cfg.getValue("App", "channel");

    // Debug print config
    qDebug() << "Read server addr:" << m_serverAddr;
    qDebug() << "Read app id:" << m_appId;
}

void UpdateLogic::checkUpdate()
{
    if (m_serverAddr.isEmpty() || m_appId.isEmpty() || m_curVer.isEmpty() || m_channel.isEmpty())
    {
        qDebug() << "Config incomplete, abort update check";
        m_needUpdate = false;
        return;
    }
    QString url = m_serverAddr + "/api/v1/update/check";
    QJsonObject body;
    body["app_id"] = m_appId;
    body["current_version"] = m_curVer;
    body["channel"] = m_channel;

    m_http.postRequest(url, body, [this](int code, const QJsonObject& resp)
        {
            qDebug() << "Check update HTTP code:" << code;
            m_lastStatusCode = code;
            m_checkResp = resp;
            m_networkOk = (code == 200);
            if (code == 200)
            {
                const QString appDir = QApplication::applicationDirPath();
                PolicyHelper onlinePolicy(appDir);
                LocalStateHelper state(appDir);
                const bool stateLoaded = state.loadState();
                const bool policyValid = onlinePolicy.loadPolicyObject(
                    resp.value("policy").toObject(), resp.value("policy_text").toString());
                if (!policyValid || !stateLoaded
                    || state.isPolicySeqRolledBack(onlinePolicy.policySeq())
                    || !onlinePolicy.savePolicy())
                {
                    qDebug() << "Online policy rejected:" << onlinePolicy.errorString();
                    m_networkOk = false;
                    m_needUpdate = false;
                    return;
                }
                state.updateOnlineVerified(onlinePolicy.policySeq());
                if (!state.saveState())
                {
                    qDebug() << "Cannot persist online policy state";
                    m_networkOk = false;
                    m_needUpdate = false;
                    return;
                }
                m_needUpdate = resp["need_update"].toBool();
                m_latestVer = resp["latest_version"].toString();
                qDebug() << "Need update:" << m_needUpdate;
                qDebug() << "Latest version:" << m_latestVer;
                qDebug() << "Policy seq:" << onlinePolicy.policySeq();
            }
            else
            {
                m_needUpdate = false;
                qDebug() << "Check update api failed";
            }
        });
}

void UpdateLogic::getDownloadUrl(const QString& appId, const QString& channel, const QString& ver, int verId)
{
    QString url = m_serverAddr + "/api/v1/update/download-url";
    QJsonObject body;
    body["app_id"] = appId;
    body["channel"] = channel;
    body["version"] = ver;
    body["version_id"] = verId;
    QJsonArray files;
    body["files"] = files;

    m_http.postRequest(url, body, [](int code, const QJsonObject& resp)
        {
            qDebug() << "\n========== File Download Url ==========";
            qDebug() << resp["files"].toArray();
        });
}

void UpdateLogic::reportUpdateResult(const QString& deviceId, const QString& fromVer, const QString& toVer, bool success)
{
    QString url = m_serverAddr + "/api/v1/update/report";
    QJsonObject body;
    body["device_id"] = deviceId;
    body["from_version"] = fromVer;
    body["to_version"] = toVer;
    body["result"] = success ? "success" : "fail";

    m_http.postRequest(url, body, [](int code, const QJsonObject& resp)
        {
            qDebug() << "\n========== Update Report Result ==========";
            qDebug() << resp;
        });
}