// FCSR - File/Resource Chunk (reversed "RSCF")
// Contains embedded file data with path and type information
// Primary chunk type for storing assets in Asura archives

type fcsr_chunk [display="FCSR Resource"] byteorder BE
{
    // Save chunk start position
    chunk_start = pos();

    // Standard 16-byte Asura chunk header
    chunk_id = ascii(read(4));
    u32 chunk_size;
    u32 version;
    u32 flags;

    chunk_id = chunk_id [ui, readonly, display="Chunk ID"];
    chunk_size = chunk_size [ui, readonly, display="Chunk Size"];
    version = version [ui, readonly, display="Version"];
    flags = flags [ui, readonly, display="Flags"];

    // Resource metadata
    u32 resource_type;
    u32 unknown1;
    u32 resource_size;

    resource_type = resource_type [ui, readonly, display="Resource Type"];
    unknown1 = unknown1 [ui, readonly, display="Unknown"];
    resource_size = resource_size [ui, readonly, display="Resource Size"];

    // Resource file path (null-terminated)
    resource_path = cstring();
    resource_path = resource_path [ui, readonly, display="Resource Path"];

    // Get filename from path and set as chunk name for tree display
    export_name = basename(resource_path);
    _name = export_name;

    // Calculate where resource data starts
    resource_offset = chunk_start + chunk_size - resource_size;

    // Export resource if size > 0
    if (resource_size > 0 && resource_offset >= pos()) {
        // Seek to resource data
        seek(resource_offset);

        // Read resource data
        resource_data = read(resource_size);

        // Export the file
        write_file(export_name, resource_data);

        // Preview all resources (C++ handles routing to image/audio/hex viewer)
        preview(export_name, resource_data);
    }
}