package com.qmth.ops.biz.service;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.qmth.boot.core.solar.model.AppLicense;
import com.qmth.boot.core.solar.model.OrgInfo;
import com.qmth.boot.tools.codec.CodecUtils;
import com.qmth.boot.tools.crypto.AES;
import com.qmth.boot.tools.crypto.RSA;
import com.qmth.boot.tools.crypto.RsaHelper;
import com.qmth.boot.tools.device.DeviceInfo;
import com.qmth.boot.tools.models.ByteArray;
import com.qmth.ops.biz.domain.Deploy;
import com.qmth.ops.biz.domain.Org;
import com.qmth.ops.biz.query.OrgQuery;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.validation.constraints.NotNull;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

@Service
public class LicenseService {

    private RsaHelper privateKey;

    @Resource
    private AppService appService;

    @Resource
    private OrgService orgService;

    @Resource
    private FileService fileService;

    public LicenseService(@Value("${admin.private-key}") String privateKeyFile) throws IOException {
        privateKey = RSA.getPrivateKey(ByteArray.fromFile(new File(privateKeyFile)).value());
    }

    public DeviceInfo parseDeviceInfo(MultipartFile file) throws Exception {
        return new ObjectMapper().readValue(privateKey.decrypt(file.getBytes()).value(), DeviceInfo.class);
    }

    public void buildLicense(@NotNull Deploy deploy, String deviceId, String version, @NotNull OutputStream ous)
            throws Exception {
        //build deploy info
        AppLicense license = new AppLicense();
        license.setId(deploy.getId());
        license.setName(deploy.getName());
        license.setControl(deploy.getControl());
        license.setOrgs(new ArrayList<>());
        //build org info list
        OrgQuery query = new OrgQuery();
        query.setDeployId(deploy.getId());
        query.setEnable(true);
        query.setPageNumber(1);
        query.setPageSize(100);
        while (true) {
            List<Org> orgs = orgService.listByQuery(query);
            if (orgs == null || orgs.isEmpty()) {
                break;
            }
            for (Org org : orgs) {
                OrgInfo info = org.buildOrgInfo(fileService.getServer());
                info.setLogo(fileService.getOrgLogo(org).toBase64());
                license.getOrgs().add(info);
            }
            query.setPageNumber(query.getPageNumber() + 1);
        }
        byte[] data = new ObjectMapper().writeValueAsBytes(license);
        ByteArrayOutputStream temp = new ByteArrayOutputStream();
        temp.write(CodecUtils.md5(data));
        temp.write(privateKey.encrypt(data).value());
        //不限设备与版本
        if (deviceId == null && version == null) {
            ous.write((byte) 0);
            ous.write(temp.toByteArray());
        }
        //限制设备，不限版本
        else if (deviceId != null && version == null) {
            ous.write((byte) 1);
            ous.write(AES.encrypt(temp.toByteArray(), deviceId.substring(0, 16), deviceId.substring(16)).value());
        }
        //不限设置，限制版本
        else if (deviceId == null && version != null) {
            String versionMd5 = ByteArray.md5(version).toHexString();
            ous.write((byte) 2);
            ous.write(AES.encrypt(temp.toByteArray(), versionMd5.substring(0, 16), versionMd5.substring(16)).value());
        }
        //限制设备与版本
        else {
            String versionMd5 = ByteArray.md5(version).toHexString();
            ous.write((byte) 3);
            ous.write(AES.encrypt(
                    AES.encrypt(temp.toByteArray(), deviceId.substring(0, 16), deviceId.substring(16)).value(),
                    versionMd5.substring(0, 16), versionMd5.substring(16)).value());
        }
        ous.close();
    }
}