package main

import (
	"fmt"
	"github.com/filecoin-project/specs-actors/actors/builtin"
	"github.com/libp2p/go-libp2p-core/peer"
	"golang.org/x/xerrors"

	ma "github.com/multiformats/go-multiaddr"
	"github.com/urfave/cli/v2"

	"github.com/filecoin-project/specs-actors/actors/abi"
	"github.com/filecoin-project/specs-actors/actors/builtin/miner"

	"github.com/filecoin-project/lotus/chain/actors"
	"github.com/filecoin-project/lotus/chain/types"
	lcli "github.com/filecoin-project/lotus/cli"
)

var actorCmd = &cli.Command{
	Name:  "actor",
	Usage: "manipulate the miner actor",
	Subcommands: []*cli.Command{
		actorSetAddrsCmd,
		actorWithdrawCmd,
		actorSetPeeridCmd,
	},
}

var actorSetAddrsCmd = &cli.Command{
	Name:  "set-addrs",
	Usage: "set addresses that your miner can be publicly dialed on",
	Flags: []cli.Flag{
		&cli.Int64Flag{
			Name:  "gas-limit",
			Usage: "set gas limit",
			Value: 0,
		},
	},
	Action: func(cctx *cli.Context) error {
		nodeAPI, closer, err := lcli.GetStorageMinerAPI(cctx)
		if err != nil {
			return err
		}
		defer closer()

		api, acloser, err := lcli.GetFullNodeAPI(cctx)
		if err != nil {
			return err
		}
		defer acloser()

		ctx := lcli.ReqContext(cctx)

		var addrs []abi.Multiaddrs
		for _, a := range cctx.Args().Slice() {
			maddr, err := ma.NewMultiaddr(a)
			if err != nil {
				return fmt.Errorf("failed to parse %q as a multiaddr: %w", a, err)
			}

			addrs = append(addrs, maddr.Bytes())
		}

		maddr, err := nodeAPI.ActorAddress(ctx)
		if err != nil {
			return err
		}

		minfo, err := api.StateMinerInfo(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}

		params, err := actors.SerializeParams(&miner.ChangeMultiaddrsParams{NewMultiaddrs: addrs})
		if err != nil {
			return err
		}

		gasLimit := cctx.Int64("gas-limit")

		smsg, err := api.MpoolPushMessage(ctx, &types.Message{
			To:       maddr,
			From:     minfo.Worker,
			Value:    types.NewInt(0),
			GasLimit: gasLimit,
			Method:   builtin.MethodsMiner.ChangeMultiaddrs,
			Params:   params,
		}, nil)
		if err != nil {
			return err
		}

		fmt.Printf("Requested multiaddrs change in message %s\n", smsg.Cid())
		return nil

	},
}

var actorSetPeeridCmd = &cli.Command{
	Name:  "set-peer-id",
	Usage: "set the peer id of your miner",
	Flags: []cli.Flag{
		&cli.Int64Flag{
			Name:  "gas-limit",
			Usage: "set gas limit",
			Value: 0,
		},
	},
	Action: func(cctx *cli.Context) error {
		nodeAPI, closer, err := lcli.GetStorageMinerAPI(cctx)
		if err != nil {
			return err
		}
		defer closer()

		api, acloser, err := lcli.GetFullNodeAPI(cctx)
		if err != nil {
			return err
		}
		defer acloser()

		ctx := lcli.ReqContext(cctx)

		pid, err := peer.IDFromString(cctx.Args().Get(0))
		if err != nil {
			return fmt.Errorf("failed to parse input as a peerId: %w", err)
		}

		maddr, err := nodeAPI.ActorAddress(ctx)
		if err != nil {
			return err
		}

		minfo, err := api.StateMinerInfo(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}

		params, err := actors.SerializeParams(&miner.ChangePeerIDParams{NewID: abi.PeerID(pid)})
		if err != nil {
			return err
		}

		gasLimit := cctx.Int64("gas-limit")

		smsg, err := api.MpoolPushMessage(ctx, &types.Message{
			To:       maddr,
			From:     minfo.Worker,
			Value:    types.NewInt(0),
			GasLimit: gasLimit,
			Method:   builtin.MethodsMiner.ChangePeerID,
			Params:   params,
		}, nil)
		if err != nil {
			return err
		}

		fmt.Printf("Requested peerid change in message %s\n", smsg.Cid())
		return nil

	},
}

var actorWithdrawCmd = &cli.Command{
	Name:      "withdraw",
	Usage:     "withdraw available balance",
	ArgsUsage: "[amount (FIL)]",
	Action: func(cctx *cli.Context) error {
		nodeApi, closer, err := lcli.GetStorageMinerAPI(cctx)
		if err != nil {
			return err
		}
		defer closer()

		api, acloser, err := lcli.GetFullNodeAPI(cctx)
		if err != nil {
			return err
		}
		defer acloser()

		ctx := lcli.ReqContext(cctx)

		maddr, err := nodeApi.ActorAddress(ctx)
		if err != nil {
			return err
		}

		mi, err := api.StateMinerInfo(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}

		available, err := api.StateMinerAvailableBalance(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}

		amount := available
		if cctx.Args().Present() {
			f, err := types.ParseFIL(cctx.Args().First())
			if err != nil {
				return xerrors.Errorf("parsing 'amount' argument: %w", err)
			}

			amount = abi.TokenAmount(f)

			if amount.GreaterThan(available) {
				return xerrors.Errorf("can't withdraw more funds than available; requested: %s; available: %s", amount, available)
			}
		}

		params, err := actors.SerializeParams(&miner.WithdrawBalanceParams{
			AmountRequested: amount, // Default to attempting to withdraw all the extra funds in the miner actor
		})
		if err != nil {
			return err
		}

		smsg, err := api.MpoolPushMessage(ctx, &types.Message{
			To:     maddr,
			From:   mi.Owner,
			Value:  types.NewInt(0),
			Method: builtin.MethodsMiner.WithdrawBalance,
			Params: params,
		}, nil)
		if err != nil {
			return err
		}

		fmt.Printf("Requested rewards withdrawal in message %s\n", smsg.Cid())

		return nil
	},
}