package types

import (
	sdk "github.com/cosmos/cosmos-sdk/types"
	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
	host "github.com/cosmos/cosmos-sdk/x/ibc/24-host"
)

// msg types
const (
	TypeMsgTransfer = "transfer"
)

// NewMsgTransfer creates a new MsgTransfer instance
func NewMsgTransfer(
	sourcePort, sourceChannel string,
	amount sdk.Coins, sender sdk.AccAddress, receiver string,
	timeoutHeight, timeoutTimestamp uint64,
) *MsgTransfer {
	return &MsgTransfer{
		SourcePort:       sourcePort,
		SourceChannel:    sourceChannel,
		Amount:           amount,
		Sender:           sender,
		Receiver:         receiver,
		TimeoutHeight:    timeoutHeight,
		TimeoutTimestamp: timeoutTimestamp,
	}
}

// Route implements sdk.Msg
func (MsgTransfer) Route() string {
	return RouterKey
}

// Type implements sdk.Msg
func (MsgTransfer) Type() string {
	return TypeMsgTransfer
}

// ValidateBasic performs a basic check of the MsgTransfer fields.
// NOTE: timeout height and timestamp values can be 0 to disable the timeout.
func (msg MsgTransfer) ValidateBasic() error {
	if err := host.PortIdentifierValidator(msg.SourcePort); err != nil {
		return sdkerrors.Wrap(err, "invalid source port ID")
	}
	if err := host.ChannelIdentifierValidator(msg.SourceChannel); err != nil {
		return sdkerrors.Wrap(err, "invalid source channel ID")
	}
	if !msg.Amount.IsAllPositive() {
		return sdkerrors.Wrap(sdkerrors.ErrInsufficientFunds, msg.Amount.String())
	}
	if !msg.Amount.IsValid() {
		return sdkerrors.Wrap(sdkerrors.ErrInvalidCoins, msg.Amount.String())
	}
	if msg.Sender.Empty() {
		return sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, "missing sender address")
	}
	if msg.Receiver == "" {
		return sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, "missing recipient address")
	}
	return nil
}

// GetSignBytes implements sdk.Msg
func (msg MsgTransfer) GetSignBytes() []byte {
	return sdk.MustSortJSON(ModuleCdc.MustMarshalJSON(msg))
}

// GetSigners implements sdk.Msg
func (msg MsgTransfer) GetSigners() []sdk.AccAddress {
	return []sdk.AccAddress{msg.Sender}
}