eq2go/internal/transmute/packet_builder.go

package transmute

import (
	"fmt"
)

// PacketBuilderImpl provides a default implementation of the PacketBuilder interface
type PacketBuilderImpl struct {
	// Packet configuration or builder would go here
	// This is a placeholder implementation
}

// NewPacketBuilder creates a new packet builder implementation
func NewPacketBuilder() *PacketBuilderImpl {
	return &PacketBuilderImpl{}
}

// BuildItemRequestPacket builds a packet for transmutable item selection
func (pb *PacketBuilderImpl) BuildItemRequestPacket(requestID int32, items []int32, version int32) ([]byte, error) {
	// This is a placeholder implementation
	// In a real implementation, this would use the PacketStruct system:
	// PacketStruct* p = configReader.getStruct("WS_EqTargetItemCmd", version)
	// p->setDataByName("request_id", requestID)
	// p->setDataByName("request_type", REQUEST_TYPE_TRANSMUTE_ITEM)
	// p->setDataByName("unknownff", 0xff)
	// p->setArrayLengthByName("item_array_size", len(items))
	// for i, itemID := range items {
	//     p->setArrayDataByName("item_id", itemID, i)
	// }
	// return p->serialize()
	
	if len(items) == 0 {
		return nil, fmt.Errorf("no transmutable items found")
	}
	
	// TODO: Build actual packet using packet structure system
	// For now, return a placeholder packet
	packet := make([]byte, 0)
	return packet, nil
}

// BuildConfirmationPacket builds a confirmation dialog packet
func (pb *PacketBuilderImpl) BuildConfirmationPacket(requestID int32, item Item, version int32) ([]byte, error) {
	// This is a placeholder implementation
	// In a real implementation, this would use the PacketStruct system:
	// PacketStruct* p = configReader.getStruct("WS_ChoiceWindow", version)
	// message := fmt.Sprintf("Are you sure you want to transmute the %s?", item.GetName())
	// p->setMediumStringByName("text", message)
	// p->setMediumStringByName("accept_text", "OK")
	// acceptCommand := fmt.Sprintf("targetitem %d %d 1", requestID, item.GetUniqueID())
	// cancelCommand := fmt.Sprintf("targetitem %d %d", requestID, item.GetUniqueID())
	// p->setMediumStringByName("accept_command", acceptCommand)
	// p->setMediumStringByName("cancel_text", "Cancel")
	// p->setMediumStringByName("cancel_command", cancelCommand)
	// return p->serialize()
	
	if item == nil {
		return nil, fmt.Errorf("item cannot be nil")
	}
	
	// TODO: Build actual packet using packet structure system
	// For now, return a placeholder packet
	packet := make([]byte, 0)
	return packet, nil
}

// BuildRewardPacket builds a quest completion/reward packet
func (pb *PacketBuilderImpl) BuildRewardPacket(items []Item, version int32) ([]byte, error) {
	// This is a placeholder implementation
	// In a real implementation, this would use the PacketStruct system:
	// PacketStruct* packet = configReader.getStruct("WS_QuestComplete", version)
	// packet->setDataByName("title", "Item Transmuted!")
	// packet->setArrayLengthByName("num_rewards", len(items))
	// for i, item := range items {
	//     packet->setArrayDataByName("reward_id", item.GetID(), i)
	//     if version < 860 {
	//         packet->setItemArrayDataByName("item", item, player, i, 0, -1)
	//     } else if version < 1193 {
	//         packet->setItemArrayDataByName("item", item, player, i)
	//     } else {
	//         packet->setItemArrayDataByName("item", item, player, i, 0, 2)
	//     }
	// }
	// return packet->serialize()
	
	if len(items) == 0 {
		return nil, fmt.Errorf("no reward items provided")
	}
	
	// TODO: Build actual packet using packet structure system
	// For now, return a placeholder packet
	packet := make([]byte, 0)
	return packet, nil
}

// TODO: When integrating with the real packet system, these methods would look like:

/*
// Example of actual packet building using the EQ2 packet structure system
func (pb *PacketBuilderImpl) BuildItemRequestPacket(requestID int32, items []int32, version int32) ([]byte, error) {
	// Get the packet structure for this version
	packetStruct := pb.configReader.GetStruct("WS_EqTargetItemCmd", version)
	if packetStruct == nil {
		return nil, fmt.Errorf("could not find packet struct WS_EqTargetItemCmd for version %d", version)
	}
	
	// Set the basic fields
	packetStruct.SetDataByName("request_id", requestID)
	packetStruct.SetDataByName("request_type", REQUEST_TYPE_TRANSMUTE_ITEM)
	packetStruct.SetDataByName("unknownff", 0xff)
	
	// Set the item array
	packetStruct.SetArrayLengthByName("item_array_size", len(items))
	for i, itemID := range items {
		packetStruct.SetArrayDataByName("item_id", itemID, i)
	}
	
	// Serialize and return
	return packetStruct.Serialize()
}

func (pb *PacketBuilderImpl) BuildConfirmationPacket(requestID int32, item Item, version int32) ([]byte, error) {
	packetStruct := pb.configReader.GetStruct("WS_ChoiceWindow", version)
	if packetStruct == nil {
		return nil, fmt.Errorf("could not find packet struct WS_ChoiceWindow for version %d", version)
	}
	
	// Build the confirmation message
	message := fmt.Sprintf("Are you sure you want to transmute the %s?", item.GetName())
	packetStruct.SetMediumStringByName("text", message)
	packetStruct.SetMediumStringByName("accept_text", "OK")
	
	// Build the command strings
	acceptCommand := fmt.Sprintf("targetitem %d %d 1", requestID, item.GetUniqueID())
	cancelCommand := fmt.Sprintf("targetitem %d %d", requestID, item.GetUniqueID())
	
	packetStruct.SetMediumStringByName("accept_command", acceptCommand)
	packetStruct.SetMediumStringByName("cancel_text", "Cancel")
	packetStruct.SetMediumStringByName("cancel_command", cancelCommand)
	
	return packetStruct.Serialize()
}

func (pb *PacketBuilderImpl) BuildRewardPacket(items []Item, version int32) ([]byte, error) {
	packetStruct := pb.configReader.GetStruct("WS_QuestComplete", version)
	if packetStruct == nil {
		return nil, fmt.Errorf("could not find packet struct WS_QuestComplete for version %d", version)
	}
	
	packetStruct.SetDataByName("title", "Item Transmuted!")
	packetStruct.SetArrayLengthByName("num_rewards", len(items))
	
	for i, item := range items {
		packetStruct.SetArrayDataByName("reward_id", item.GetID(), i)
		
		// Version-specific item serialization
		if version < 860 {
			packetStruct.SetItemArrayDataByName("item", item, nil, i, 0, -1)
		} else if version < 1193 {
			packetStruct.SetItemArrayDataByName("item", item, nil, i)
		} else {
			packetStruct.SetItemArrayDataByName("item", item, nil, i, 0, 2)
		}
	}
	
	return packetStruct.Serialize()
}
*/