package cash.z.wallet.sdk.sample.demoapp

import androidx.test.platform.app.InstrumentationRegistry
import cash.z.ecc.android.sdk.Synchronizer
import cash.z.ecc.android.sdk.demoapp.type.fromResources
import cash.z.ecc.android.sdk.ext.convertZecToZatoshi
import cash.z.ecc.android.sdk.ext.toHex
import cash.z.ecc.android.sdk.internal.TroubleshootingTwig
import cash.z.ecc.android.sdk.internal.Twig
import cash.z.ecc.android.sdk.internal.service.LightWalletGrpcService
import cash.z.ecc.android.sdk.internal.twig
import cash.z.ecc.android.sdk.model.Account
import cash.z.ecc.android.sdk.model.BlockHeight
import cash.z.ecc.android.sdk.model.LightWalletEndpoint
import cash.z.ecc.android.sdk.model.Mainnet
import cash.z.ecc.android.sdk.model.ZcashNetwork
import cash.z.ecc.android.sdk.model.defaultForNetwork
import cash.z.ecc.android.sdk.model.isFailure
import cash.z.ecc.android.sdk.tool.DerivationTool
import kotlinx.coroutines.runBlocking
import org.junit.Assert.assertEquals
import org.junit.Assert.assertFalse
import org.junit.Assert.assertTrue
import org.junit.BeforeClass
import org.junit.Ignore
import org.junit.Test

/**
 * Sample code to demonstrate key functionality without UI, inspired by:
 * https://github.com/EdgeApp/eosjs-node-cli/blob/paul/cleanup/app.js
 */
class SampleCodeTest {

    // ///////////////////////////////////////////////////
    // Seed derivation
    @Ignore("This test is not implemented")
    @Test
    fun createBip39Seed_fromSeedPhrase() {
        // TODO: log(seedPhrase.asRawEntropy().asBip39seed())
    }

    @Ignore("This test is not implemented")
    @Test
    fun createRawEntropy() {
        // TODO: call: Mnemonic::from_phrase(seed_phrase, Language::English).unwrap().entropy()
        // log(seedPhrase.asRawEntropy())
    }

    @Ignore("This test is not implemented")
    @Test
    fun createBip39Seed_fromRawEntropy() {
        // get the 64 byte bip39 entropy
        // TODO: call: bip39::Seed::new(&Mnemonic::from_entropy(&seed_bytes, Language::English).unwrap(), "")
        // log(rawEntropy.asBip39Seed())
    }

    @Ignore("This test is not implemented")
    @Test
    fun deriveSeedPhraseFrom() {
        // TODO: let mnemonic = Mnemonic::from_entropy(entropy, Language::English).unwrap();
        // log(entropy.asSeedPhrase())
    }

    // ///////////////////////////////////////////////////
    // Get Address
    @Test fun getAddress() = runBlocking {
        val address = synchronizer.getUnifiedAddress()
        assertFalse(address.isBlank())
        log("Address: $address")
    }

    // ///////////////////////////////////////////////////
    // Derive address from Extended Full Viewing Key
    @Test fun getAddressFromViewingKey() {
    }

    // ///////////////////////////////////////////////////
    // Query latest block height
    @Test fun getLatestBlockHeightTest() {
        val lightwalletService = LightWalletGrpcService.new(context, lightwalletdHost)
        log("Latest Block: ${lightwalletService.getLatestBlockHeight()}")
    }

    // ///////////////////////////////////////////////////
    // Download compact block range
    @Test fun getBlockRange() {
        val blockRange = BlockHeight.new(ZcashNetwork.Mainnet, 500_000)..BlockHeight.new(
            ZcashNetwork.Mainnet,
            500_009
        )
        val lightwalletService = LightWalletGrpcService.new(context, lightwalletdHost)
        val blocks = lightwalletService.getBlockRange(blockRange)
        assertEquals(blockRange.endInclusive.value - blockRange.start.value, blocks.count())

        blocks.forEachIndexed { i, block ->
            log("Block #$i:    height:${block.height}   hash:${block.hash.toByteArray().toHex()}")
        }
    }

    // ///////////////////////////////////////////////////
    // Query account outgoing transactions
    @Test fun queryOutgoingTransactions() {
    }

    // ///////////////////////////////////////////////////
    // Query account incoming transactions
    @Test fun queryIncomingTransactions() {
    }

//    // ///////////////////////////////////////////////////
//    // Create a signed transaction (with memo)
//    @Test fun createTransaction() = runBlocking {
//        val rustBackend = RustBackend.init(context)
//        val repository = PagedTransactionRepository(context)
//        val encoder = WalletTransactionEncoder(rustBackend, repository)
//        val spendingKey = DerivationTool.deriveSpendingKeys(seed, ZcashNetwork.Mainnet)[0]
//
//        val amount = 0.123.convertZecToZatoshi()
//        val address = "ztestsapling1tklsjr0wyw0d58f3p7wufvrj2cyfv6q6caumyueadq8qvqt8lda6v6tpx474rfru9y6u75u7qnw"
//        val memo = "Test Transaction".toByteArray()
//
//        val encodedTx = encoder.createTransaction(spendingKey, amount, address, memo)
//        assertTrue(encodedTx.raw.isNotEmpty())
//        log("Transaction ID: ${encodedTx.txId.toHex()}")
//    }

    // ///////////////////////////////////////////////////
    // Create a signed transaction (with memo) and broadcast
    @Test fun submitTransaction() = runBlocking {
        val amount = 0.123.convertZecToZatoshi()
        val address = "ztestsapling1tklsjr0wyw0d58f3p7wufvrj2cyfv6q6caumyueadq8qvqt8lda6v6tpx474rfru9y6u75u7qnw"
        val memo = "Test Transaction"
        val spendingKey = DerivationTool.deriveUnifiedSpendingKey(seed, ZcashNetwork.Mainnet, Account.DEFAULT)
        val transactionFlow = synchronizer.sendToAddress(spendingKey, amount, address, memo)
        transactionFlow.collect {
            log("pending transaction updated $it")
            assertTrue("Failed to send funds. See log for details.", !it.isFailure())
        }
    }

    // /////////////////////////////////////////////////////
    // Utility Functions
    // ////////////////////////////////////////////////////

    companion object {
        private val seed = "Insert seed for testing".toByteArray()
        private val lightwalletdHost = LightWalletEndpoint.Mainnet

        private val context = InstrumentationRegistry.getInstrumentation().targetContext
        private val synchronizer: Synchronizer = run {
            val network = ZcashNetwork.fromResources(context)
            Synchronizer.newBlocking(
                context,
                network,
                lightWalletEndpoint = LightWalletEndpoint.defaultForNetwork(network),
                seed = seed,
                birthday = null
            )
        }

        @BeforeClass
        @JvmStatic
        fun init() {
            Twig.plant(TroubleshootingTwig())
        }

        fun log(message: String?) = twig(message ?: "null")
    }
}