// SPDX-License-Identifier: BUSL-1.1
//
// Copyright (C) 2025, Berachain Foundation. All rights reserved.
// Use of this software is governed by the Business Source License included
// in the LICENSE file of this repository and at www.mariadb.com/bsl11.
//
// ANY USE OF THE LICENSED WORK IN VIOLATION OF THIS LICENSE WILL AUTOMATICALLY
// TERMINATE YOUR RIGHTS UNDER THIS LICENSE FOR THE CURRENT AND ALL OTHER
// VERSIONS OF THE LICENSED WORK.
//
// THIS LICENSE DOES NOT GRANT YOU ANY RIGHT IN ANY TRADEMARK OR LOGO OF
// LICENSOR OR ITS AFFILIATES (PROVIDED THAT YOU MAY USE A TRADEMARK OR LOGO OF
// LICENSOR AS EXPRESSLY REQUIRED BY THIS LICENSE).
//
// TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE LICENSED WORK IS PROVIDED ON
// AN “AS IS” BASIS. LICENSOR HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS,
// EXPRESS OR IMPLIED, INCLUDING (WITHOUT LIMITATION) WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND
// TITLE.

package debug

import (
	"github.com/berachain/beacon-kit/node-api/handlers"
	beacontypes "github.com/berachain/beacon-kit/node-api/handlers/beacon/types"
	"github.com/berachain/beacon-kit/node-api/handlers/utils"
	"github.com/berachain/beacon-kit/primitives/version"
)

func (h *Handler) GetState(c handlers.Context) (any, error) {
	req, err := utils.BindAndValidate[beacontypes.GetStateRequest](
		c, h.Logger(),
	)
	if err != nil {
		return nil, err
	}
	height, err := utils.StateIDToHeight(req.StateID, h.backend)
	if err != nil {
		return nil, err
	}

	// Get the raw state at the given slot.
	state, _, err := h.backend.StateAndSlotFromHeight(height)
	if err != nil {
		return nil, err
	}
	beaconState, err := state.GetMarshallable()
	if err != nil {
		return nil, err
	}

	// Get the fork version from the state.
	fork, err := state.GetFork()
	if err != nil {
		return nil, err
	}

	return beacontypes.StateResponse{
		// All data is finalized in CometBFT since we only return data for slots up to head
		Finalized: true,
		// Never optimistic since we only return finalized data
		ExecutionOptimistic: false,

		Version: version.Name(fork.CurrentVersion),
		Data:    beaconState,
	}, nil
}
