package main

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"net/http"
	"strings"
	"time"

	"github.com/cosmos/cosmos-sdk/codec"
	crkeys "github.com/cosmos/cosmos-sdk/crypto/keys"
	sdk "github.com/cosmos/cosmos-sdk/types"
	sdkrest "github.com/cosmos/cosmos-sdk/types/rest"
	"github.com/cosmos/cosmos-sdk/version"
	"github.com/cosmos/cosmos-sdk/x/auth"
	authrest "github.com/cosmos/cosmos-sdk/x/auth/client/rest"
	authclient "github.com/cosmos/cosmos-sdk/x/auth/client/utils"
	authexported "github.com/cosmos/cosmos-sdk/x/auth/exported"
	"github.com/cosmos/cosmos-sdk/x/bank"
	"github.com/cosmos/cosmos-sdk/x/gov"
	"github.com/cosmos/cosmos-sdk/x/gov/types"
	"github.com/cosmos/cosmos-sdk/x/staking"

	tmtime "github.com/tendermint/tendermint/types/time"

	"github.com/kava-labs/kava/app"
	"github.com/kava-labs/kava/x/cdp"
	"github.com/kava-labs/kava/x/pricefeed"
)

func init() {
	version.Name = "kava"
	config := sdk.GetConfig()
	app.SetBech32AddressPrefixes(config)
	app.SetBip44CoinType(config)
	config.Seal()
	keybase = getKeybase()
}

var (
	keybase crkeys.Keybase
)

func main() {

	// setup messages send to blockchain so it is in the correct state for testing
	sendProposal()
	sendDeposit()
	sendVote()
	sendDelegation()
	sendUndelegation()
	sendCoins()

	// create an XRP cdp and send to blockchain
	sendXrpCdp()

	// create a BTC cdp and send to blockchain
	sendBtcCdp()

	// reduce the price of BTC to trigger an auction
	sendMsgPostPrice()
}

// lower the price of xrp to trigger an auction
func sendMsgPostPrice() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addr, err := sdk.AccAddressFromBech32(address) // validator address
	if err != nil {
		panic(err)
	}

	price, err := sdk.NewDecFromStr("1")
	if err != nil {
		panic(err)
	}
	// set the expiry time
	expiry := tmtime.Now().Add(time.Second * 100000)

	// create a cdp message to send to the blockchain
	// from, assetcode, price, expiry
	msg := pricefeed.NewMsgPostPrice(
		addr,
		"btc:usd",
		price,
		expiry,
	)

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// cast to the generic msg type
	msgToSend := []sdk.Msg{msg}

	// send the message to the blockchain
	sendMsgToBlockchain(cdc, address, keyname, password, msgToSend, keybase)

}

func sendBtcCdp() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addr, err := sdk.AccAddressFromBech32(address) // validator address
	if err != nil {
		panic(err)
	}

	// create a cdp message to send to the blockchain
	// sender, collateral, principal
	msg := cdp.NewMsgCreateCDP(
		addr,
		sdk.NewInt64Coin("btc", 200000000),
		sdk.NewInt64Coin("usdx", 10000000),
		"btc-a",
	)

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// cast to the generic msg type
	msgToSend := []sdk.Msg{msg}

	// send the message to the blockchain
	sendMsgToBlockchain(cdc, address, keyname, password, msgToSend, keybase)

}

func sendXrpCdp() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addr, err := sdk.AccAddressFromBech32(address) // validator address
	if err != nil {
		panic(err)
	}

	// create a cdp message to send to the blockchain
	// sender, collateral, principal
	msg := cdp.NewMsgCreateCDP(
		addr,
		sdk.NewInt64Coin("xrp", 200000000),
		sdk.NewInt64Coin("usdx", 10000000),
		"xrp-a",
	)

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// cast to the generic msg type
	msgToSend := []sdk.Msg{msg}

	// send the message to the blockchain
	sendMsgToBlockchain(cdc, address, keyname, password, msgToSend, keybase)

}

func sendProposal() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	proposalContent := gov.ContentFromProposalType("A Test Title", "A test description on this proposal.", gov.ProposalTypeText)
	addr, err := sdk.AccAddressFromBech32(address) // validator address
	if err != nil {
		panic(err)
	}

	// create a message to send to the blockchain
	msg := gov.NewMsgSubmitProposal(
		proposalContent,
		sdk.NewCoins(sdk.NewInt64Coin("stake", 1000)),
		addr,
	)

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// SEND THE PROPOSAL
	// cast to the generic msg type
	msgToSend := []sdk.Msg{msg}

	// send the PROPOSAL message to the blockchain
	sendMsgToBlockchain(cdc, address, keyname, password, msgToSend, keybase)

}

func sendDeposit() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addr, err := sdk.AccAddressFromBech32(address) // validator
	if err != nil {
		panic(err)
	}

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// NOW SEND THE DEPOSIT

	// create a deposit transaction to send to the proposal
	amount := sdk.NewCoins(sdk.NewInt64Coin(sdk.DefaultBondDenom, 10000000))
	deposit := gov.NewMsgDeposit(addr, 1, amount) // Note: '1' must match 'x-example' in swagger.yaml
	depositToSend := []sdk.Msg{deposit}

	sendMsgToBlockchain(cdc, address, keyname, password, depositToSend, keybase)

}

func sendVote() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addr, err := sdk.AccAddressFromBech32(address) // validator
	if err != nil {
		panic(err)
	}

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// NOW SEND THE VOTE

	// create a vote on a proposal to send to the blockchain
	vote := gov.NewMsgVote(addr, uint64(1), types.OptionYes) // Note: '1' must match 'x-example' in swagger.yaml

	// send a vote to the blockchain
	voteToSend := []sdk.Msg{vote}
	sendMsgToBlockchain(cdc, address, keyname, password, voteToSend, keybase)

}

// this should send coins from one address to another
func sendCoins() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addrFrom, err := sdk.AccAddressFromBech32(address) // validator
	if err != nil {
		panic(err)
	}

	addrTo, err := sdk.AccAddressFromBech32("kava1ls82zzghsx0exkpr52m8vht5jqs3un0ceysshz") // Note: must match the faucet address
	if err != nil {
		panic(err)
	}

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// create coins
	amount := sdk.NewCoins(sdk.NewInt64Coin(sdk.DefaultBondDenom, 2000000))

	coins := bank.NewMsgSend(addrFrom, addrTo, amount) // Note: '1' must match 'x-example' in swagger.yaml
	coinsToSend := []sdk.Msg{coins}

	// NOW SEND THE COINS

	// send the coin message to the blockchain
	sendMsgToBlockchain(cdc, address, keyname, password, coinsToSend, keybase)

}

func getTestAddress() (address string) {
	// the test address - Note: this must match with startchain.sh
	address = "kava1ffv7nhd3z6sych2qpqkk03ec6hzkmufy0r2s4c"
	return address
}

func getKeynameAndPassword() (keyname string, password string) {
	keyname = "vlad" // Note: this must match the keys in the startchain.sh script
	password = ""    // Note: this must match the keys in the startchain.sh script
	return keyname, password
}

// this should send a delegation
func sendDelegation() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addrFrom, err := sdk.AccAddressFromBech32(address) // validator
	if err != nil {
		panic(err)
	}

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// get the validator address for delegation
	valAddr, err := sdk.ValAddressFromBech32("kavavaloper1ffv7nhd3z6sych2qpqkk03ec6hzkmufyz4scd0") // **FAUCET**
	if err != nil {
		panic(err)
	}

	// create delegation amount
	delAmount := sdk.NewInt64Coin(sdk.DefaultBondDenom, 1000000)
	delegation := staking.NewMsgDelegate(addrFrom, valAddr, delAmount)
	delegationToSend := []sdk.Msg{delegation}

	// send the delegation to the blockchain
	sendMsgToBlockchain(cdc, address, keyname, password, delegationToSend, keybase)
}

// this should send a MsgUndelegate
func sendUndelegation() {
	// get the address
	address := getTestAddress()
	// get the keyname and password
	keyname, password := getKeynameAndPassword()

	addrFrom, err := sdk.AccAddressFromBech32(address) // validator
	if err != nil {
		panic(err)
	}

	// helper methods for transactions
	cdc := app.MakeCodec() // make codec for the app

	// get the keybase
	keybase := getKeybase()

	// get the validator address for delegation
	valAddr, err := sdk.ValAddressFromBech32("kavavaloper1ffv7nhd3z6sych2qpqkk03ec6hzkmufyz4scd0") // **FAUCET**
	if err != nil {
		panic(err)
	}

	// create delegation amount
	undelAmount := sdk.NewInt64Coin(sdk.DefaultBondDenom, 1000000)
	undelegation := staking.NewMsgUndelegate(addrFrom, valAddr, undelAmount)
	delegationToSend := []sdk.Msg{undelegation}

	// send the delegation to the blockchain
	sendMsgToBlockchain(cdc, address, keyname, password, delegationToSend, keybase)

}

func getKeybase() crkeys.Keybase {

	if keybase != nil {
		return keybase
	}

	// create a keybase
	// IMPORTANT - TAKE THIS FROM COMMAND LINE PARAMETER and does NOT work with tilde i.e. ~/ does NOT work
	// myKeybase, err := keys.NewKeyBaseFromDir("/tmp/kvcliHome")

	inBuf := strings.NewReader("")
	keybase, err := crkeys.NewKeyring(sdk.KeyringServiceName(),
		"test", "/tmp/kvcliHome", inBuf)

	if err != nil {
		panic(err)
	}
	return keybase
}

// sendMsgToBlockchain sends a message to the blockchain via the rest api
func sendMsgToBlockchain(cdc *codec.Codec, address string, keyname string,
	password string, msg []sdk.Msg, keybase crkeys.Keybase) {

	// get the account number and sequence number
	accountNumber, sequenceNumber := getAccountNumberAndSequenceNumber(cdc, address)

	txBldr := auth.NewTxBuilder(
		authclient.GetTxEncoder(cdc), accountNumber, sequenceNumber, 500000, 0,
		true, "testing", "memo", sdk.NewCoins(), sdk.NewDecCoins(),
	).WithTxEncoder(authclient.GetTxEncoder(cdc)).WithChainID("testing").
		WithKeybase(keybase).WithAccountNumber(accountNumber).
		WithSequence(sequenceNumber).WithGas(500000)

	// build and sign the transaction
	// this is the *Amino* encoded version of the transaction
	txBytes, err := txBldr.BuildAndSign("vlad", "", msg)
	if err != nil {
		panic(err)
	}
	// fmt.Printf("txBytes: %s", txBytes)

	// need to convert the Amino encoded version back to an actual go struct
	var tx auth.StdTx
	cdc.UnmarshalBinaryLengthPrefixed(txBytes, &tx) // might be unmarshal binary bare

	// now we re-marshall it again into json
	jsonBytes, err := cdc.MarshalJSON(
		authrest.BroadcastReq{
			Tx:   tx,
			Mode: "block",
		},
	)

	fmt.Printf("%s", bytes.NewBuffer(jsonBytes))

	if err != nil {
		panic(err)
	}
	fmt.Println()
	fmt.Println("post body: ", string(jsonBytes))
	fmt.Println()

	resp, err := http.Post("http://localhost:1317/txs", "application/json", bytes.NewBuffer(jsonBytes))
	if err != nil {
		panic(err)
	}

	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		panic(err)
	}

	fmt.Printf("\n\nBody:\n\n")
	fmt.Println(string(body))

}

// getAccountNumberAndSequenceNumber gets an account number and sequence number from the blockchain
func getAccountNumberAndSequenceNumber(cdc *codec.Codec, address string) (accountNumber uint64, sequenceNumber uint64) {

	// we need to setup the account number and sequence in order to have a valid transaction
	resp, err := http.Get("http://localhost:1317/auth/accounts/" + address)
	if err != nil {
		panic(err)
	}

	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		panic(err)
	}

	var bodyUnmarshalled sdkrest.ResponseWithHeight
	err = cdc.UnmarshalJSON(body, &bodyUnmarshalled)
	if err != nil {
		panic(err)
	}

	var account authexported.Account
	err = cdc.UnmarshalJSON(bodyUnmarshalled.Result, &account)
	if err != nil {
		panic(err)
	}

	return account.GetAccountNumber(), account.GetSequence()

}