/*  Copyright (C) 2018-2024 Andreas Shimokawa, Daniel Dakhno

    This file is part of Gadgetbridge.

    Gadgetbridge is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Gadgetbridge is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>. */
package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband2;

import java.util.HashMap;
import java.util.Map;

import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiFirmwareInfo;
import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiFirmwareType;
import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;

public class Mi2FirmwareInfo extends HuamiFirmwareInfo {
    private static final byte[] FW_HEADER = new byte[]{
            (byte) 0xa3,
            (byte) 0x68,
            (byte) 0x04,
            (byte) 0x3b,
            (byte) 0x02,
            (byte) 0xdb,
            (byte) 0xc8,
            (byte) 0x58,
            (byte) 0xd0,
            (byte) 0x50,
            (byte) 0xfa,
            (byte) 0xe7,
            (byte) 0x0c,
            (byte) 0x34,
            (byte) 0xf3,
            (byte) 0xe7,
    };

    private static final int FW_HEADER_OFFSET = 0x150;

    private static final byte FW_MAGIC = (byte) 0xf8;
    private static final int FW_MAGIC_OFFSET = 0x17d;

    private static Map<Integer, String> crcToVersion = new HashMap<>();

    static {
        // firmware
        crcToVersion.put(41899, "1.0.0.39");
        crcToVersion.put(49197, "1.0.0.53");
        crcToVersion.put(32450, "1.0.1.28");
        crcToVersion.put(51770, "1.0.1.34");
        crcToVersion.put(3929,  "1.0.1.39");
        crcToVersion.put(47364, "1.0.1.54");
        crcToVersion.put(44776, "1.0.1.59");
        crcToVersion.put(27318, "1.0.1.67");
        crcToVersion.put(54702, "1.0.1.69");
        crcToVersion.put(31698, "1.0.1.81");
        crcToVersion.put(53474, "1.0.1.81 (tph)");
        crcToVersion.put(46048, "1.0.1.81 (tph as7000)");
        crcToVersion.put(19930, "1.0.1.81 (tph india)");
        // fonts
        crcToVersion.put(45624, "Font");
        crcToVersion.put(6377,  "Font (En)");
    }

    public Mi2FirmwareInfo(byte[] bytes) {
        super(bytes);
    }

    protected HuamiFirmwareType determineFirmwareType(byte[] bytes) {
        if (ArrayUtils.startsWith(bytes, FT_HEADER)) {
            if (bytes[FONT_TYPE_OFFSET] == 0x00 || bytes[FONT_TYPE_OFFSET] == (byte) 0xff) {
                return HuamiFirmwareType.FONT;
            }
            return HuamiFirmwareType.INVALID;
        }
        if (ArrayUtils.equals(bytes, FW_HEADER, FW_HEADER_OFFSET)
                && (bytes[FW_MAGIC_OFFSET] == FW_MAGIC)) {
            // TODO: this is certainly not a correct validation, but it works for now
            return HuamiFirmwareType.FIRMWARE;
        }
        return HuamiFirmwareType.INVALID;
    }

    public boolean isGenerallyCompatibleWith(GBDevice device) {
        return isHeaderValid() && (device.getType() == DeviceType.MIBAND2 || device.getType() == DeviceType.MIBAND2_HRX);
    }

    protected Map<Integer, String> getCrcMap() {
        return crcToVersion;
    }

    @Override
    protected String searchFirmwareVersion(byte[] fwbytes) {
        // does not work for Mi Band 2
        return null;
    }
}