package keeper

import (
	"fmt"
	"time"

	"cosmossdk.io/math"
	sdk "github.com/cosmos/cosmos-sdk/types"
	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"

	"github.com/sonr-io/sonr/x/dex/types"
)

// ProvideLiquidity handles liquidity provision through ICA
func (k Keeper) ProvideLiquidity(
	ctx sdk.Context,
	did string,
	connectionID string,
	poolID uint64,
	tokenA sdk.Coin,
	tokenB sdk.Coin,
	minShares math.Int,
) (uint64, error) {
	// Get the DEX account
	account, err := k.GetDEXAccount(ctx, did, connectionID)
	if err != nil {
		return 0, fmt.Errorf("DEX account not found: %w", err)
	}

	// Verify account is active
	if account.Status != types.ACCOUNT_STATUS_ACTIVE {
		return 0, fmt.Errorf("DEX account is not active")
	}

	// Create liquidity provision message for remote chain
	// This is a placeholder - actual implementation would use chain-specific messages
	lpMsg := &banktypes.MsgSend{
		FromAddress: account.AccountAddress,
		ToAddress:   account.AccountAddress, // Placeholder
		Amount:      sdk.NewCoins(tokenA, tokenB),
	}

	// Send the liquidity transaction via ICA
	sequence, err := k.SendDEXTransaction(
		ctx,
		did,
		connectionID,
		[]sdk.Msg{lpMsg},
		fmt.Sprintf("provide_liquidity_pool_%d", poolID),
		30*time.Second,
	)
	if err != nil {
		return 0, fmt.Errorf("failed to send liquidity transaction: %w", err)
	}

	// Emit liquidity event
	ctx.EventManager().EmitEvent(
		sdk.NewEvent(
			types.EventTypeLiquidityProvided,
			sdk.NewAttribute("did", did),
			sdk.NewAttribute("connection", connectionID),
			sdk.NewAttribute("pool_id", fmt.Sprintf("%d", poolID)),
			sdk.NewAttribute("token_a", tokenA.String()),
			sdk.NewAttribute("token_b", tokenB.String()),
			sdk.NewAttribute("sequence", fmt.Sprintf("%d", sequence)),
		),
	)

	return sequence, nil
}

// RemoveLiquidity handles liquidity removal through ICA
func (k Keeper) RemoveLiquidity(
	ctx sdk.Context,
	did string,
	connectionID string,
	poolID uint64,
	shares math.Int,
	minAmountA math.Int,
	minAmountB math.Int,
) (uint64, error) {
	// Get the DEX account
	account, err := k.GetDEXAccount(ctx, did, connectionID)
	if err != nil {
		return 0, fmt.Errorf("DEX account not found: %w", err)
	}

	// Verify account is active
	if account.Status != types.ACCOUNT_STATUS_ACTIVE {
		return 0, fmt.Errorf("DEX account is not active")
	}

	// Create liquidity removal message for remote chain
	// This is a placeholder - actual implementation would use chain-specific messages
	removeMsg := &banktypes.MsgSend{
		FromAddress: account.AccountAddress,
		ToAddress:   account.AccountAddress, // Placeholder
		Amount:      sdk.NewCoins(sdk.NewCoin("shares", shares)),
	}

	// Send the removal transaction via ICA
	sequence, err := k.SendDEXTransaction(
		ctx,
		did,
		connectionID,
		[]sdk.Msg{removeMsg},
		fmt.Sprintf("remove_liquidity_pool_%d", poolID),
		30*time.Second,
	)
	if err != nil {
		return 0, fmt.Errorf("failed to send liquidity removal transaction: %w", err)
	}

	// Emit removal event
	ctx.EventManager().EmitEvent(
		sdk.NewEvent(
			types.EventTypeLiquidityRemoved,
			sdk.NewAttribute("did", did),
			sdk.NewAttribute("connection", connectionID),
			sdk.NewAttribute("pool_id", fmt.Sprintf("%d", poolID)),
			sdk.NewAttribute("shares", shares.String()),
			sdk.NewAttribute("sequence", fmt.Sprintf("%d", sequence)),
		),
	)

	return sequence, nil
}

// EstimateLPShares estimates the LP shares for given liquidity
func (k Keeper) EstimateLPShares(
	ctx sdk.Context,
	connectionID string,
	poolID uint64,
	tokenA sdk.Coin,
	tokenB sdk.Coin,
) (math.Int, error) {
	// This would query the remote chain for LP share estimation
	// For now, return a placeholder value
	totalValue := tokenA.Amount.Add(tokenB.Amount)
	return totalValue.QuoRaw(2), nil // Simple average as placeholder
}

// GetPoolInfo retrieves pool information from remote chain
func (k Keeper) GetPoolInfo(
	ctx sdk.Context,
	connectionID string,
	poolID uint64,
) (*PoolInfo, error) {
	// This would query the remote chain for pool info
	// For now, return placeholder data
	return &PoolInfo{
		PoolID:      poolID,
		TokenA:      "uatom",
		TokenB:      "uosmo",
		TotalShares: math.NewInt(1000000),
		TotalLiquidity: sdk.NewCoins(
			sdk.NewCoin("uatom", math.NewInt(500000)),
			sdk.NewCoin("uosmo", math.NewInt(500000)),
		),
	}, nil
}

// PoolInfo represents pool information
type PoolInfo struct {
	PoolID         uint64
	TokenA         string
	TokenB         string
	TotalShares    math.Int
	TotalLiquidity sdk.Coins
}

// ValidateLiquidityParameters validates liquidity parameters
func (k Keeper) ValidateLiquidityParameters(
	tokenA sdk.Coin,
	tokenB sdk.Coin,
	minShares math.Int,
) error {
	if tokenA.IsZero() || tokenB.IsZero() {
		return fmt.Errorf("token amounts cannot be zero")
	}

	if tokenA.Denom == tokenB.Denom {
		return fmt.Errorf("cannot provide liquidity with same token")
	}

	if minShares.IsNegative() {
		return fmt.Errorf("minimum shares cannot be negative")
	}

	return nil
}