_base_ = [
    'mmdet3d::_base_/datasets/nus-3d.py', 'mmdet3d::_base_/default_runtime.py',
    'mmdet3d::_base_/schedules/cyclic-20e.py'
]
backbone_norm_cfg = dict(type='LN', requires_grad=True)
custom_imports = dict(imports=['projects.PETR.petr'])

randomness = dict(seed=1, deterministic=False, diff_rank_seed=False)
# If point cloud range is changed, the models should also change their point
# cloud range accordingly
point_cloud_range = [-51.2, -51.2, -5.0, 51.2, 51.2, 3.0]
voxel_size = [0.2, 0.2, 8]
img_norm_cfg = dict(
    mean=[103.530, 116.280, 123.675],
    std=[57.375, 57.120, 58.395],
    to_rgb=False)
# For nuScenes we usually do 10-class detection
class_names = [
    'car', 'truck', 'construction_vehicle', 'bus', 'trailer', 'barrier',
    'motorcycle', 'bicycle', 'pedestrian', 'traffic_cone'
]
metainfo = dict(classes=class_names)

input_modality = dict(use_camera=True)
model = dict(
    type='PETR',
    data_preprocessor=dict(
        type='Det3DDataPreprocessor',
        mean=[103.530, 116.280, 123.675],
        std=[57.375, 57.120, 58.395],
        bgr_to_rgb=False,
        pad_size_divisor=32),
    use_grid_mask=True,
    img_backbone=dict(
        type='VoVNetCP',
        spec_name='V-99-eSE',
        norm_eval=True,
        frozen_stages=-1,
        input_ch=3,
        out_features=(
            'stage4',
            'stage5',
        )),
    img_neck=dict(
        type='CPFPN', in_channels=[768, 1024], out_channels=256, num_outs=2),
    pts_bbox_head=dict(
        type='PETRHead',
        num_classes=10,
        in_channels=256,
        num_query=900,
        LID=True,
        with_position=True,
        with_multiview=True,
        position_range=[-61.2, -61.2, -10.0, 61.2, 61.2, 10.0],
        normedlinear=False,
        transformer=dict(
            type='PETRTransformer',
            decoder=dict(
                type='PETRTransformerDecoder',
                return_intermediate=True,
                num_layers=6,
                transformerlayers=dict(
                    type='PETRTransformerDecoderLayer',
                    attn_cfgs=[
                        dict(
                            type='MultiheadAttention',
                            embed_dims=256,
                            num_heads=8,
                            attn_drop=0.1,
                            dropout_layer=dict(type='Dropout', drop_prob=0.1)),
                        dict(
                            type='PETRMultiheadAttention',
                            embed_dims=256,
                            num_heads=8,
                            attn_drop=0.1,
                            dropout_layer=dict(type='Dropout', drop_prob=0.1)),
                    ],
                    feedforward_channels=2048,
                    ffn_dropout=0.1,
                    operation_order=('self_attn', 'norm', 'cross_attn', 'norm',
                                     'ffn', 'norm')),
            )),
        bbox_coder=dict(
            type='NMSFreeCoder',
            post_center_range=[-61.2, -61.2, -10.0, 61.2, 61.2, 10.0],
            pc_range=point_cloud_range,
            max_num=300,
            voxel_size=voxel_size,
            num_classes=10),
        positional_encoding=dict(
            type='SinePositionalEncoding3D', num_feats=128, normalize=True),
        loss_cls=dict(
            type='mmdet.FocalLoss',
            use_sigmoid=True,
            gamma=2.0,
            alpha=0.25,
            loss_weight=2.0),
        loss_bbox=dict(type='mmdet.L1Loss', loss_weight=0.25),
        loss_iou=dict(type='mmdet.GIoULoss', loss_weight=0.0)),
    # model training and testing settings
    train_cfg=dict(
        pts=dict(
            grid_size=[512, 512, 1],
            voxel_size=voxel_size,
            point_cloud_range=point_cloud_range,
            out_size_factor=4,
            assigner=dict(
                type='HungarianAssigner3D',
                cls_cost=dict(type='FocalLossCost', weight=2.0),
                reg_cost=dict(type='BBox3DL1Cost', weight=0.25),
                iou_cost=dict(
                    type='IoUCost', weight=0.0
                ),  # Fake cost. Just to be compatible with DETR head.
                pc_range=point_cloud_range))))

dataset_type = 'NuScenesDataset'
data_root = 'data/nuscenes/'
file_client_args = dict(backend='disk')

db_sampler = dict(
    data_root=data_root,
    info_path=data_root + 'nuscenes_dbinfos_train.pkl',
    rate=1.0,
    prepare=dict(
        filter_by_difficulty=[-1],
        filter_by_min_points=dict(
            car=5,
            truck=5,
            bus=5,
            trailer=5,
            construction_vehicle=5,
            traffic_cone=5,
            barrier=5,
            motorcycle=5,
            bicycle=5,
            pedestrian=5)),
    classes=class_names,
    sample_groups=dict(
        car=2,
        truck=3,
        construction_vehicle=7,
        bus=4,
        trailer=6,
        barrier=2,
        motorcycle=6,
        bicycle=6,
        pedestrian=2,
        traffic_cone=2),
    points_loader=dict(
        type='LoadPointsFromFile',
        coord_type='LIDAR',
        load_dim=5,
        use_dim=[0, 1, 2, 3, 4]))
ida_aug_conf = {
    'resize_lim': (0.47, 0.625),
    'final_dim': (320, 800),
    'bot_pct_lim': (0.0, 0.0),
    'rot_lim': (0.0, 0.0),
    'H': 900,
    'W': 1600,
    'rand_flip': True,
}

train_pipeline = [
    dict(type='LoadMultiViewImageFromFiles', to_float32=True),
    dict(
        type='LoadAnnotations3D',
        with_bbox_3d=True,
        with_label_3d=True,
        with_attr_label=False),
    dict(type='ObjectRangeFilter', point_cloud_range=point_cloud_range),
    dict(type='ObjectNameFilter', classes=class_names),
    dict(
        type='ResizeCropFlipImage', data_aug_conf=ida_aug_conf, training=True),
    dict(
        type='GlobalRotScaleTransImage',
        rot_range=[-0.3925, 0.3925],
        translation_std=[0, 0, 0],
        scale_ratio_range=[0.95, 1.05],
        reverse_angle=False,
        training=True),
    dict(
        type='Pack3DDetInputs',
        keys=[
            'img', 'gt_bboxes', 'gt_bboxes_labels', 'attr_labels',
            'gt_bboxes_3d', 'gt_labels_3d', 'centers_2d', 'depths'
        ])
]
test_pipeline = [
    dict(type='LoadMultiViewImageFromFiles', to_float32=True),
    dict(
        type='ResizeCropFlipImage', data_aug_conf=ida_aug_conf,
        training=False),
    dict(type='Pack3DDetInputs', keys=['img'])
]

train_dataloader = dict(
    batch_size=1,
    num_workers=4,
    dataset=dict(
        type=dataset_type,
        data_prefix=dict(
            pts='samples/LIDAR_TOP',
            CAM_FRONT='samples/CAM_FRONT',
            CAM_FRONT_LEFT='samples/CAM_FRONT_LEFT',
            CAM_FRONT_RIGHT='samples/CAM_FRONT_RIGHT',
            CAM_BACK='samples/CAM_BACK',
            CAM_BACK_RIGHT='samples/CAM_BACK_RIGHT',
            CAM_BACK_LEFT='samples/CAM_BACK_LEFT'),
        pipeline=train_pipeline,
        box_type_3d='LiDAR',
        metainfo=metainfo,
        test_mode=False,
        modality=input_modality,
        use_valid_flag=True))
test_dataloader = dict(
    dataset=dict(
        type=dataset_type,
        data_prefix=dict(
            pts='samples/LIDAR_TOP',
            CAM_FRONT='samples/CAM_FRONT',
            CAM_FRONT_LEFT='samples/CAM_FRONT_LEFT',
            CAM_FRONT_RIGHT='samples/CAM_FRONT_RIGHT',
            CAM_BACK='samples/CAM_BACK',
            CAM_BACK_RIGHT='samples/CAM_BACK_RIGHT',
            CAM_BACK_LEFT='samples/CAM_BACK_LEFT'),
        pipeline=test_pipeline,
        box_type_3d='LiDAR',
        metainfo=metainfo,
        test_mode=True,
        modality=input_modality,
        use_valid_flag=True))
val_dataloader = dict(
    dataset=dict(
        type=dataset_type,
        data_prefix=dict(
            pts='samples/LIDAR_TOP',
            CAM_FRONT='samples/CAM_FRONT',
            CAM_FRONT_LEFT='samples/CAM_FRONT_LEFT',
            CAM_FRONT_RIGHT='samples/CAM_FRONT_RIGHT',
            CAM_BACK='samples/CAM_BACK',
            CAM_BACK_RIGHT='samples/CAM_BACK_RIGHT',
            CAM_BACK_LEFT='samples/CAM_BACK_LEFT'),
        pipeline=test_pipeline,
        box_type_3d='LiDAR',
        metainfo=metainfo,
        test_mode=True,
        modality=input_modality,
        use_valid_flag=True))

# Different from original PETR:
# We don't use special lr for image_backbone
# This seems won't affect model performance
optim_wrapper = dict(
    # TODO Add Amp
    # type='AmpOptimWrapper',
    # loss_scale='dynamic',
    optimizer=dict(type='AdamW', lr=2e-4, weight_decay=0.01),
    paramwise_cfg=dict(custom_keys={
        'img_backbone': dict(lr_mult=0.1),
    }),
    clip_grad=dict(max_norm=35, norm_type=2))

num_epochs = 24

param_scheduler = [
    dict(
        type='LinearLR',
        start_factor=1.0 / 3,
        begin=0,
        end=500,
        by_epoch=False),
    dict(
        type='CosineAnnealingLR',
        # TODO Figure out what T_max
        T_max=num_epochs,
        by_epoch=True,
    )
]

train_cfg = dict(max_epochs=num_epochs, val_interval=num_epochs)

find_unused_parameters = False

# pretrain_path can be found here:
# https://drive.google.com/file/d/1ABI5BoQCkCkP4B0pO5KBJ3Ni0tei0gZi/view
load_from = '/mnt/d/fcos3d_vovnet_imgbackbone-remapped.pth'
resume = False

# --------------Original---------------
# mAP: 0.3778
# mATE: 0.7463
# mASE: 0.2718
# mAOE: 0.4883
# mAVE: 0.9062
# mAAE: 0.2123
# NDS: 0.4264
# Eval time: 242.1s

# Per-class results:
# Object Class    AP      ATE     ASE     AOE     AVE     AAE
# car     0.556   0.555   0.153   0.091   0.917   0.216
# truck   0.330   0.805   0.218   0.119   0.859   0.250
# bus     0.412   0.789   0.205   0.162   2.067   0.337
# trailer 0.221   0.976   0.233   0.663   0.797   0.146
# construction_vehicle    0.094   1.096   0.493   1.145   0.190   0.349
# pedestrian      0.453   0.688   0.289   0.636   0.549   0.235
# motorcycle      0.368   0.690   0.256   0.622   1.417   0.149
# bicycle 0.341   0.609   0.270   0.812   0.455   0.017
# traffic_cone    0.531   0.582   0.320   nan     nan     nan
# barrier 0.472   0.673   0.281   0.145   nan     nan

# --------------Refactored in mmdet3d v1.0---------------
# mAP: 0.3827
# mATE: 0.7375
# mASE: 0.2703
# mAOE: 0.4799
# mAVE: 0.8699
# mAAE: 0.2038
# NDS: 0.4352
# Eval time: 124.8s

# Per-class results:
# Object Class	  AP	  ATE	  ASE	  AOE	  AVE	  AAE
# car	  0.574	  0.519	  0.150	  0.087	  0.865	  0.206
# truck	  0.349	  0.773	  0.213	  0.117	  0.855	  0.220
# bus	  0.423	  0.781	  0.204	  0.122	  1.902	  0.319
# trailer 0.219	  1.034	  0.231	  0.608	  0.830	  0.149
# construction_vehicle	  0.084	  1.062	  0.486	  1.245	  0.172	  0.360
# pedestrian	  0.452	  0.681	  0.293	  0.646	  0.529	  0.231
# motorcycle	  0.378	  0.670	  0.250	  0.567	  1.334	  0.130
# bicycle	      0.347	  0.639	  0.264	  0.788	  0.472	  0.016
# traffic_cone	  0.538	  0.553	  0.325	  nan	  nan	  nan
# barrier	      0.464	  0.662	 0.287	  0.137	  nan	  nan

# --------------Refactored in mmdet3d v1.1---------------
# mAP: 0.3830
# mATE: 0.7547
# mASE: 0.2683
# mAOE: 0.4948
# mAVE: 0.8331
# mAAE: 0.2056
# NDS: 0.4358
# Eval time: 118.7s

# Per-class results:
# Object Class	  AP	  ATE	  ASE	  AOE	  AVE	  AAE
# car	  0.567	  0.538	  0.151	  0.086	  0.873	  0.212
# truck	  0.341	  0.785	  0.213	  0.113	  0.821	  0.234
# bus	  0.426	  0.766	  0.201	  0.128	  1.813	  0.343
# trailer 0.216	  1.116	  0.227	  0.649	  0.640	  0.122
# construction_vehicle	  0.093	  1.118	  0.483	  1.292	  0.217	  0.330
# pedestrian	  0.453	  0.685	  0.293	  0.644	  0.535	  0.238
# motorcycle	  0.374	  0.700	  0.253	  0.624	  1.291	  0.154
# bicycle	      0.345	  0.622	  0.262	  0.775	  0.475	  0.011
# traffic_cone	  0.539	  0.557	  0.319	  nan	  nan	  nan
# barrier	      0.476	  0.661	  0.279	  0.142	  nan	  nan
