import {
  ExecuteInstruction,
  ExecuteResult,
  SigningCosmWasmClient,
} from '@cosmjs/cosmwasm-stargate'
import { fromBech32, toBase64, toBech32 } from '@cosmjs/encoding'
import { Coin, DeliverTxResponse, isDeliverTxFailure } from '@cosmjs/stargate'
import { parseRawLog } from '@cosmjs/stargate/build/logs'
import { toUtf8 } from 'secretjs'

import { HugeDecimal } from '@dao-dao/math'
import { ContractVersion, GenericToken, TokenType } from '@dao-dao/types'
import {
  MsgExecuteContract,
  MsgInstantiateContract,
  MsgInstantiateContract2,
} from '@dao-dao/types/protobuf/codegen/cosmwasm/wasm/v1/tx'

import { getChainForChainId } from './chain'
import { findEventsAttributeValue } from './client'
import { CHAIN_GAS_MULTIPLIER } from './constants'
import { encodeJsonToBase64 } from './messages'
import { SecretSigningCosmWasmClient } from './secret'

const CONTRACT_VERSIONS = Object.values(ContractVersion)

// If version is defined, returns it. Otherwise, returns
// ContractVersion.Unknown.
export const parseContractVersion = (version: string): ContractVersion =>
  CONTRACT_VERSIONS.find((v) => v === version) || ContractVersion.Unknown

export const indexToProposalModulePrefix = (index: number) => {
  index += 1
  let prefix = ''
  while (index > 0) {
    const letterIndex = (index - 1) % 26
    // capital A = 65, Z = 90
    prefix = String.fromCharCode('A'.charCodeAt(0) + letterIndex) + prefix
    index = ((index - letterIndex) / 26) | 0
  }

  return prefix
}

export type SupportedSigningCosmWasmClient =
  | SigningCosmWasmClient
  | SecretSigningCosmWasmClient

/**
 * Instantiate a smart contract from any supported client.
 *
 * This uses our custom instantiate encoder since CosmJS is unreliable due to
 * the SDK version (47+) change that improperly handles the optional admin field
 * as an empty string. The normal signing client `instantiate` function is thus
 * no longer reliable.
 *
 * If `salt` is passed, instantiate2 will be used instead of instantiate.
 */
export const instantiateSmartContract = async (
  client:
    | SupportedSigningCosmWasmClient
    | (() => Promise<SupportedSigningCosmWasmClient>),
  sender: string,
  codeId: number,
  label: string,
  msg: object,
  funds?: Coin[],
  admin?: string | null,
  fee = CHAIN_GAS_MULTIPLIER,
  memo: string | undefined = undefined,
  /**
   * If passed, will use instantiate2 instead of instantiate.
   */
  salt: Uint8Array | undefined = undefined
): Promise<string> => {
  client = typeof client === 'function' ? await client() : client

  if (client instanceof SecretSigningCosmWasmClient) {
    if (salt) {
      throw new Error('Secret Network does not support instantiate2')
    }

    const { contractAddress } = await client.instantiate(
      sender,
      codeId,
      msg,
      label,
      fee,
      {
        funds,
        admin: typeof admin === 'string' ? admin : undefined,
        memo,
      }
    )

    return contractAddress
  } else {
    const result = await client.signAndBroadcast(
      sender,
      [
        salt
          ? {
              typeUrl: MsgInstantiateContract2.typeUrl,
              value: MsgInstantiateContract2.fromPartial({
                sender,
                admin: admin ?? undefined,
                codeId: BigInt(codeId),
                label,
                msg: toUtf8(JSON.stringify(msg)),
                funds,
                salt,
                fixMsg: false,
              }),
            }
          : {
              typeUrl: MsgInstantiateContract.typeUrl,
              value: MsgInstantiateContract.fromPartial({
                sender,
                admin: admin ?? undefined,
                codeId: BigInt(codeId),
                label,
                msg: toUtf8(JSON.stringify(msg)),
                funds,
              }),
            },
      ],
      fee,
      memo
    )

    if (isDeliverTxFailure(result)) {
      throw new Error(createDeliverTxResponseErrorMessage(result))
    }

    const contractAddress = findEventsAttributeValue(
      result.events,
      'instantiate',
      '_contract_address'
    )

    if (!contractAddress) {
      throw new Error(
        `Contract address not found for TX: ${result.transactionHash}`
      )
    }

    return contractAddress
  }
}

/**
 * Execute a smart contract message from any supported client.
 */
export const executeSmartContract = async (
  client:
    | SupportedSigningCosmWasmClient
    | (() => Promise<SupportedSigningCosmWasmClient>),
  sender: string,
  contractAddress: string,
  msg: object,
  funds?: Coin[],
  fee = CHAIN_GAS_MULTIPLIER,
  memo: string | undefined = undefined
): Promise<ExecuteResult> =>
  executeSmartContracts({
    client,
    sender,
    instructions: [{ contractAddress, msg, funds }],
    fee,
    memo,
  })

/**
 * Execute a smart contract message with tokens from any supported client.
 */
export const executeSmartContractWithToken = async ({
  client,
  sender,
  contractAddress,
  msg,
  token,
  amount,
  fee = CHAIN_GAS_MULTIPLIER,
  memo = undefined,
}: {
  client:
    | SupportedSigningCosmWasmClient
    | (() => Promise<SupportedSigningCosmWasmClient>)
  sender: string
  contractAddress: string
  msg: object
  token: GenericToken
  amount: HugeDecimal
  fee?: number
  memo?: string
}): Promise<ExecuteResult> => {
  return executeSmartContracts({
    client,
    sender,
    instructions: [
      // Wrap in CW20 send if necessary.
      token.type === TokenType.Cw20
        ? {
            contractAddress: token.denomOrAddress,
            msg: {
              send: {
                amount,
                contract: contractAddress,
                msg: encodeJsonToBase64(msg),
              },
            },
          }
        : {
            contractAddress,
            msg,
            funds: amount.toCoins(token.denomOrAddress),
          },
    ],
    fee,
    memo,
  })
}

/**
 * Execute one or more smart contract messages from any supported client.
 */
export const executeSmartContracts = async ({
  client,
  sender,
  instructions,
  fee = CHAIN_GAS_MULTIPLIER,
  memo = undefined,
}: {
  client:
    | SupportedSigningCosmWasmClient
    | (() => Promise<SupportedSigningCosmWasmClient>)
  sender: string
  instructions: ExecuteInstruction[]
  fee?: number
  memo?: string
}): Promise<ExecuteResult> => {
  client = typeof client === 'function' ? await client() : client

  if (client instanceof SecretSigningCosmWasmClient) {
    return await client.executeMultiple(sender, instructions, fee, memo)
  } else {
    const result = await client.signAndBroadcast(
      sender,
      instructions.map(({ contractAddress, msg, funds }) => ({
        typeUrl: MsgExecuteContract.typeUrl,
        value: MsgExecuteContract.fromPartial({
          sender,
          contract: contractAddress,
          msg: toUtf8(JSON.stringify(msg)),
          funds: [...(funds || [])],
        }),
      })),
      fee,
      memo
    )

    if (isDeliverTxFailure(result)) {
      throw new Error(createDeliverTxResponseErrorMessage(result))
    }

    return {
      logs: parseRawLog(result.rawLog),
      height: result.height,
      transactionHash: result.transactionHash,
      events: result.events,
      gasWanted: result.gasWanted,
      gasUsed: result.gasUsed,
    }
  }
}

const createDeliverTxResponseErrorMessage = (result: DeliverTxResponse) =>
  `Error when broadcasting tx ${result.transactionHash} at height ${result.height}. Code: ${result.code}; Raw log: ${result.rawLog}`

/**
 * Convert bech32 address data to address string for the given chain.
 */
export const bech32DataToAddress = (
  chainId: string,
  bech32Bytes: Uint8Array
): string => toBech32(getChainForChainId(chainId).bech32Prefix, bech32Bytes)

/**
 * Convert bech32 address string to base64 string with bech32 data.
 */
export const bech32AddressToBase64 = (bech32Address: string): string =>
  toBase64(fromBech32(bech32Address).data)