Meshtastic-Android/app/src/main/java/com/geeksville/mesh/database/Converters.kt

/*
 * Copyright (c) 2025 Meshtastic LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package com.geeksville.mesh.database

import androidx.room.TypeConverter
import com.geeksville.mesh.MeshProtos
import com.geeksville.mesh.PaxcountProtos
import com.geeksville.mesh.TelemetryProtos
import com.geeksville.mesh.android.Logging
import com.google.protobuf.ByteString
import com.google.protobuf.InvalidProtocolBufferException
import kotlinx.serialization.json.Json
import org.meshtastic.core.model.DataPacket

@Suppress("TooManyFunctions")
class Converters : Logging {
    @TypeConverter
    fun dataFromString(value: String): DataPacket {
        val json = Json { isLenient = true }
        return json.decodeFromString(DataPacket.serializer(), value)
    }

    @TypeConverter
    fun dataToString(value: DataPacket): String {
        val json = Json { isLenient = true }
        return json.encodeToString(DataPacket.serializer(), value)
    }

    @TypeConverter
    fun bytesToFromRadio(bytes: ByteArray): MeshProtos.FromRadio = try {
        MeshProtos.FromRadio.parseFrom(bytes)
    } catch (ex: InvalidProtocolBufferException) {
        errormsg("bytesToFromRadio TypeConverter error:", ex)
        MeshProtos.FromRadio.getDefaultInstance()
    }

    @TypeConverter fun fromRadioToBytes(value: MeshProtos.FromRadio): ByteArray? = value.toByteArray()

    @TypeConverter
    fun bytesToUser(bytes: ByteArray): MeshProtos.User = try {
        MeshProtos.User.parseFrom(bytes)
    } catch (ex: InvalidProtocolBufferException) {
        errormsg("bytesToUser TypeConverter error:", ex)
        MeshProtos.User.getDefaultInstance()
    }

    @TypeConverter fun userToBytes(value: MeshProtos.User): ByteArray? = value.toByteArray()

    @TypeConverter
    fun bytesToPosition(bytes: ByteArray): MeshProtos.Position = try {
        MeshProtos.Position.parseFrom(bytes)
    } catch (ex: InvalidProtocolBufferException) {
        errormsg("bytesToPosition TypeConverter error:", ex)
        MeshProtos.Position.getDefaultInstance()
    }

    @TypeConverter fun positionToBytes(value: MeshProtos.Position): ByteArray? = value.toByteArray()

    @TypeConverter
    fun bytesToTelemetry(bytes: ByteArray): TelemetryProtos.Telemetry = try {
        TelemetryProtos.Telemetry.parseFrom(bytes)
    } catch (ex: InvalidProtocolBufferException) {
        errormsg("bytesToTelemetry TypeConverter error:", ex)
        TelemetryProtos.Telemetry.newBuilder().build() // Return an empty Telemetry object
    }

    @TypeConverter fun telemetryToBytes(value: TelemetryProtos.Telemetry): ByteArray? = value.toByteArray()

    @TypeConverter
    fun bytesToPaxcounter(bytes: ByteArray): PaxcountProtos.Paxcount = try {
        PaxcountProtos.Paxcount.parseFrom(bytes)
    } catch (ex: InvalidProtocolBufferException) {
        errormsg("bytesToPaxcounter TypeConverter error:", ex)
        PaxcountProtos.Paxcount.getDefaultInstance()
    }

    @TypeConverter fun paxCounterToBytes(value: PaxcountProtos.Paxcount): ByteArray? = value.toByteArray()

    @TypeConverter
    fun bytesToMetadata(bytes: ByteArray): MeshProtos.DeviceMetadata = try {
        MeshProtos.DeviceMetadata.parseFrom(bytes)
    } catch (ex: InvalidProtocolBufferException) {
        errormsg("bytesToMetadata TypeConverter error:", ex)
        MeshProtos.DeviceMetadata.getDefaultInstance()
    }

    @TypeConverter fun metadataToBytes(value: MeshProtos.DeviceMetadata): ByteArray? = value.toByteArray()

    @TypeConverter
    fun fromStringList(value: String?): List<String>? {
        if (value == null) {
            return null
        }
        return Json.decodeFromString<List<String>>(value)
    }

    @TypeConverter
    fun toStringList(list: List<String>?): String? {
        if (list == null) {
            return null
        }
        return Json.encodeToString(list)
    }

    @TypeConverter
    fun bytesToByteString(bytes: ByteArray?): ByteString? = if (bytes == null) null else ByteString.copyFrom(bytes)

    @TypeConverter fun byteStringToBytes(value: ByteString?): ByteArray? = value?.toByteArray()
}