/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "drm_display.h"
#include <string>
#include <cerrno>
#include <memory>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "display_gralloc.h"
#include "display_common.h"
#include "drm_device.h"
#include "drm_vsync_worker.h"
#include "hdi_drm_composition.h"
#include "hdi_gfx_composition.h"

namespace OHOS {
    namespace HDI {
        namespace DISPLAY {
            DrmDisplay::DrmDisplay(std::shared_ptr<DrmConnector> connector, std::shared_ptr<DrmCrtc> crtc,
                                   std::shared_ptr<DrmDevice> drmDevice)
                : mDrmDevice(drmDevice), mConnector(connector), mCrtc(crtc)
            {
            }

            DrmDisplay::~DrmDisplay()
            {
                if (mCrtc != nullptr) {
                    mCrtc->UnBindDisplay(GetId());
                }
            }

            int32_t DrmDisplay::Init()
            {
                int ret;
                DISPLAY_CHK_RETURN((mCrtc == nullptr), DISPLAY_FAILURE, DISPLAY_LOGE("crtc is null"));
                DISPLAY_CHK_RETURN((mConnector == nullptr), DISPLAY_FAILURE, DISPLAY_LOGE("connector is null"));
                DISPLAY_CHK_RETURN((mDrmDevice == nullptr), DISPLAY_FAILURE, DISPLAY_LOGE("drmDevice is null"));

                ret = HdiDisplay::Init();
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE, DISPLAY_LOGE("init failed"));
                auto preComp = std::make_unique<HdiGfxComposition>();
                DISPLAY_CHK_RETURN((preComp == nullptr), DISPLAY_FAILURE,
                                   DISPLAY_LOGE("can not new HdiGfxComposition errno %{public}d", errno));
                ret = preComp->Init();
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE,
                                   DISPLAY_LOGE("can not init HdiGfxComposition"));

                auto postComp = std::make_unique<HdiDrmComposition>(mConnector, mCrtc, mDrmDevice);
                DISPLAY_CHK_RETURN((postComp == nullptr), DISPLAY_FAILURE,
                                   DISPLAY_LOGE("can not new HdiDrmComposition errno %{public}d", errno));
                ret = postComp->Init();
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE,
                                   DISPLAY_LOGE("can not init HdiDrmComposition"));
                mComposer = std::make_unique<HdiComposer>(std::move(preComp), std::move(postComp));
                ret = mCrtc->BindToDisplay(GetId());
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE, DISPLAY_LOGE("bind crtc failed"));

                ret = ChosePreferenceMode();
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE,
                                   DISPLAY_LOGE("choose preference mode fialed"));
                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::GetDisplayCapability(DisplayCapability *info)
            {
                mConnector->GetDisplayCap(*info);
                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::GetDisplaySupportedModes(uint32_t *num, DisplayModeInfo *modes)
            {
                mConnector->GetDisplaySupportedModes(num, modes);
                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::GetDisplayMode(uint32_t *modeId)
            {
                DISPLAY_CHK_RETURN((modeId == nullptr), DISPLAY_NULL_PTR, DISPLAY_LOGE("the in modeId is nullptr"));
                *modeId = mCrtc->GetActiveModeId();
                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::SetDisplayMode(uint32_t modeId)
            {
                return mCrtc->SetActivieMode(modeId);
            }

            int32_t DrmDisplay::GetDisplayPowerStatus(DispPowerStatus *status)
            {
                DISPLAY_CHK_RETURN((status == nullptr), DISPLAY_NULL_PTR, DISPLAY_LOGE("status is nullptr"));
                return ConvertToHdiPowerState(mConnector->GetDpmsState(), *status);
            }

            int32_t DrmDisplay::SetDisplayPowerStatus(DispPowerStatus status)
            {
                static int32_t fb_fd = -1;
                int32_t err = -1;
                const uint32_t FBIOBLANK = 0x4611;     /* arg: 0 or vesa level + 1 */
                const uint32_t FB_BLANK_UNBLANK = 0;   /* screen: unblanked, hsync: on,  vsync: on */
                const uint32_t FB_BLANK_POWERDOWN = 4; /* screen: blanked,   hsync: off, vsync: off */

                DISPLAY_DEBUGLOG("SetDisplayPowerStatus power state %{public}u", status);
                if (fb_fd < 0) {
                    fb_fd = open("/dev/graphics/fb0", O_RDWR);
                    if (fb_fd < 0) {
                        DISPLAY_LOGE("oepn fb0 file failed\n");
                        return DISPLAY_NOT_SUPPORT;
                    }
                }
                switch (status) {
                    case POWER_STATUS_OFF:
                    case POWER_STATUS_STANDBY:
                    case POWER_STATUS_SUSPEND:
                        err = ioctl(fb_fd, FBIOBLANK, FB_BLANK_POWERDOWN);
                        break;
                    case POWER_STATUS_ON:
                        err = ioctl(fb_fd, FBIOBLANK, FB_BLANK_UNBLANK);
                        break;
                    default:
                        err = DISPLAY_FAILURE;
                        break;
                }
                if (err < 0) {
                    DISPLAY_LOGE("ioctl fb0 failed\n");
                    return DISPLAY_FAILURE;
                }

                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::ConvertToHdiPowerState(uint32_t drmPowerState, DispPowerStatus &hdiPowerState)
            {
                int32_t ret = DISPLAY_SUCCESS;
                switch (drmPowerState) {
                    case DRM_MODE_DPMS_OFF:
                        hdiPowerState = POWER_STATUS_OFF;
                        break;
                    case DRM_MODE_DPMS_ON:
                        hdiPowerState = POWER_STATUS_ON;
                        break;
                    case DRM_MODE_DPMS_STANDBY:
                        hdiPowerState = POWER_STATUS_STANDBY;
                        break;
                    case DRM_MODE_DPMS_SUSPEND:
                        hdiPowerState = POWER_STATUS_SUSPEND;
                        break;
                    default:
                        hdiPowerState = POWER_STATUS_BUTT;
                        ret = DISPLAY_FAILURE;
                        break;
                }
                DISPLAY_DEBUGLOG("hdi power state %{public}u", hdiPowerState);
                return ret;
            }

            int32_t DrmDisplay::ConvertToDrmPowerState(DispPowerStatus hdiPowerState, uint32_t &drmPowerState)
            {
                int32_t ret = DISPLAY_SUCCESS;
                switch (hdiPowerState) {
                    case POWER_STATUS_OFF:
                        drmPowerState = DRM_MODE_DPMS_OFF;
                        break;
                    case POWER_STATUS_ON:
                        drmPowerState = DRM_MODE_DPMS_ON;
                        break;
                    case POWER_STATUS_STANDBY:
                        drmPowerState = DRM_MODE_DPMS_STANDBY;
                        break;
                    case POWER_STATUS_SUSPEND:
                        drmPowerState = DRM_MODE_DPMS_SUSPEND;
                        break;
                    default:
                        ret = DISPLAY_FAILURE;
                        break;
                }
                return ret;
            }

            std::unique_ptr<HdiLayer> DrmDisplay::CreateHdiLayer(LayerType type)
            {
                DISPLAY_DEBUGLOG();
                return std::make_unique<HdiDrmLayer>(type);
            }

            int32_t DrmDisplay::WaitForVBlank(uint64_t *ns)
            {
                int ret;
                constexpr uint64_t nPerS = 1000000000;
                constexpr uint64_t nPerUS = 1000;
                drmVBlank vbl = {
                    .request.type = DRM_VBLANK_RELATIVE,
                    .request.sequence = 0,
                    .request.signal = 0,
                };
                DISPLAY_CHK_RETURN((ns == nullptr), DISPLAY_NULL_PTR, DISPLAY_LOGE("in ns is nullptr"));
                ret = drmWaitVBlank(mDrmDevice->GetDrmFd(), &vbl);
                DISPLAY_CHK_RETURN((ret != 0), DISPLAY_FAILURE,
                                   DISPLAY_LOGE("wait vblank failed errno %{public}d", errno));
                *ns = static_cast<uint64_t>(vbl.reply.tval_sec * nPerS + vbl.reply.tval_usec * nPerUS);
                return DISPLAY_SUCCESS;
            }

            bool DrmDisplay::IsConnected()
            {
                DISPLAY_DEBUGLOG("conneted %{public}d", mConnector->IsConnected());
                return mConnector->IsConnected();
            }

            int32_t DrmDisplay::PushFirstFrame()
            {
                GrallocFuncs *grallocFucs = nullptr;
                int ret = GrallocInitialize(&grallocFucs);
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE, DISPLAY_LOGE("Gralloc init failed"));
                DrmMode mode;
                ret = mConnector->GetModeFromId(mCrtc->GetActiveModeId(), mode);
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE,
                                   DISPLAY_LOGE("can not get the mode from id %{public}d", mCrtc->GetActiveModeId()));
                AllocInfo info = {.width = mode.GetModeInfoPtr()->hdisplay,
                                  .height = mode.GetModeInfoPtr()->vdisplay,
                                  .usage = HBM_USE_MEM_DMA | HBM_USE_CPU_READ | HBM_USE_CPU_WRITE,
                                  .format = PIXEL_FMT_BGRA_8888};

                BufferHandle *buffer = nullptr;
                ret = grallocFucs->AllocMem(&info, &buffer);
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE, DISPLAY_LOGE("can not alloc memory"));
                mClientLayer->SetLayerBuffer(buffer, -1);

                std::vector<HdiLayer *> layers;
                HdiDrmComposition *drmComp = static_cast<HdiDrmComposition *>(mComposer->GetPostCompostion());
                drmComp->SetLayers(layers, *mClientLayer);
                drmComp->Apply(true);
                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::ChosePreferenceMode()
            {
                int32_t ret;
                int32_t modeId = mConnector->GetPreferenceId();
                if (modeId == INVALID_MODE_ID) {
                    uint32_t num = 0;
                    ret = GetDisplaySupportedModes(&num, nullptr);
                    DISPLAY_CHK_RETURN((num == 0) && (ret != DISPLAY_SUCCESS), DISPLAY_FAILURE,
                                       DISPLAY_LOGE("can not get modes"));
                    modeId = 0;
                }
                ret = SetDisplayMode(modeId);
                // Push first frame to the drm, for that the vblank must init all the componet.
                DISPLAY_CHK_RETURN((ret != DISPLAY_SUCCESS), DISPLAY_FAILURE, DISPLAY_LOGE("set display mode failed"));
                return PushFirstFrame();
            }

            int32_t DrmDisplay::RegDisplayVBlankCallback(VBlankCallback cb, void *data)
            {
                DISPLAY_DEBUGLOG("the VBlankCallback %{public}p ", cb);
                (void)data;
                std::shared_ptr<VsyncCallBack> vsyncCb = std::make_shared<VsyncCallBack>(cb, nullptr, mCrtc->GetPipe());
                DrmVsyncWorker::GetInstance().ReqesterVBlankCb(vsyncCb);
                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::SetDisplayVsyncEnabled(bool enabled)
            {
                DISPLAY_DEBUGLOG("enable %{public}d", enabled);
                DrmVsyncWorker::GetInstance().EnableVsync(enabled);
                return DISPLAY_SUCCESS;
            }

            int32_t DrmDisplay::GetDisplayBacklight(uint32_t *value)
            {
                DISPLAY_CHK_RETURN((value == nullptr), DISPLAY_NULL_PTR, DISPLAY_LOGE("value is nullptr"));
                return mConnector->GetBrightness(*value);
            }

            int32_t DrmDisplay::SetDisplayBacklight(uint32_t value)
            {
                return mConnector->SetBrightness(value);
            }
        } // namespace OHOS
    }     // namespace HDI
} // namespace DISPLAY