/**
 * @module index
 */
import {IInvokeExpressionParams, WithId, WithProofs, WithSender} from '../transactions'
import {base58Encode, blake2b, signBytes,} from '@waves/ts-lib-crypto'
import {
    addProof,
    base64Prefix,
    convertToPairs,
    fee,
    getSenderPublicKey,
    networkByte,
    normalizeAssetId
} from '../generic'
import {TSeedTypes} from '../types'
import {validate} from '../validators'
import {txToProtoBytes} from '../proto-serialize'
import {DEFAULT_VERSIONS} from '../defaultVersions'
import {InvokeExpressionTransaction, TRANSACTION_TYPE} from '@waves/ts-types'

/* @echo DOCS */
export function invokeExpression(params: IInvokeExpressionParams, seed: TSeedTypes): InvokeExpressionTransaction & WithId & WithProofs
export function invokeExpression(paramsOrTx: IInvokeExpressionParams & WithSender | InvokeExpressionTransaction, seed?: TSeedTypes): InvokeExpressionTransaction & WithId & WithProofs
export function invokeExpression(paramsOrTx: any, seed?: TSeedTypes): InvokeExpressionTransaction & WithId & WithProofs{
    const type = TRANSACTION_TYPE.INVOKE_EXPRESSION
    const version = paramsOrTx.version || DEFAULT_VERSIONS.INVOKE_EXPRESSION
    const seedsAndIndexes = convertToPairs(seed)
    const senderPublicKey = getSenderPublicKey(seedsAndIndexes, paramsOrTx)

    const tx: InvokeExpressionTransaction & WithId & WithProofs = {
        type,
        version,
        senderPublicKey,
        expression: base64Prefix(paramsOrTx.expression),
        fee: fee(paramsOrTx, 1000000),
        feeAssetId: normalizeAssetId(paramsOrTx.feeAssetId),
        timestamp: paramsOrTx.timestamp || Date.now(),
        chainId: networkByte(paramsOrTx.chainId, 87),
        proofs: paramsOrTx.proofs || [],
        id: '',
    }

    validate.invokeExpression(tx)
    const bytes = txToProtoBytes(tx)

    seedsAndIndexes.forEach(([s, i]) => addProof(tx, signBytes(s, bytes), i))
    tx.id = base58Encode(base58Encode(blake2b(bytes)))

    return tx
}