/**
 * @file mvgal_vkd3d.cpp
 * @brief VKD3D-Proton integration bridge for DirectX 12 to Vulkan translation
 *
 * MVGAL - Multi-Vendor GPU Aggregation Layer for Linux
 *
 * SPDX-License-Identifier: MIT
 */

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cstdint>
#include <dlfcn.h>

#include "mvgal_vkd3d.h"

/* VKD3D bridge state */
static bool g_vkd3d_initialized = false;
static uint32_t g_vkd3d_version = 0;

/**
 * @brief Initialize VKD3D-Proton bridge
 * @return 0 on success, -1 on failure
 */
int vkd3d_bridge_init(void) {
    if (g_vkd3d_initialized) {
        return 0;
    }
    
    /* Check for VKD3D library */
    void *handle = dlopen("libvkd3d-proton.so", RTLD_LAZY);
    if (!handle) {
        fprintf(stderr, "MVGAL: VKD3D bridge: VKD3D-Proton library not found\n");
        /* Non-fatal */
    }
    
    g_vkd3d_initialized = true;
    g_vkd3d_version = 200;  /* Assume VKD3D 2.0+ */
    
    return 0;
}

/**
 * @brief Get VKD3D-Proton version
 * @return VKD3D version (major * 100 + minor)
 */
uint32_t vkd3d_bridge_get_version(void) {
    return g_vkd3d_version;
}

/**
 * @brief Check if VKD3D bridge is available
 * @return Non-zero if available, 0 if not
 */
int vkd3d_bridge_is_available(void) {
    return g_vkd3d_initialized ? 1 : 0;
}

/**
 * @brief Submit VKD3D command buffer through MVGAL
 * @param cmd_buf Command buffer to submit
 * @param wait_semaphore Wait semaphore
 * @param signal_semaphore Signal semaphore
 * @return 0 on success, -1 on failure
 */
int vkd3d_bridge_submit_command_buffer(
    void *cmd_buf,
    uint64_t wait_semaphore,
    uint64_t signal_semaphore
) {
    if (!g_vkd3d_initialized) {
        return -1;
    }
    
    /* Pass through to MVGAL scheduler */
    /* In a real implementation, this would translate VKD3D's internal
     * command buffer format to MVGAL's workload structure */
    
    return 0;
}

/**
 * @brief Get ray tracing pipeline statistics
 * @param pipeline Pipeline handle
 * @param stats Output statistics
 * @return 0 on success, -1 on failure
 */
int vkd3d_bridge_get_rt_stats(void *pipeline, VKD3DRayTracingStats *stats) {
    if (!g_vkd3d_initialized || !stats) {
        return -1;
    }
    
    memset(stats, 0, sizeof(*stats));
    return 0;
}