from functools import partial

from PIL import Image
import numpy as np
import gradio as gr
import torch
import os
import fire
from omegaconf import OmegaConf
from rembg import remove

from ldm.util import add_margin, instantiate_from_config
from sam_utils import sam_init, sam_out_nosave

import torch
print(f"Is CUDA available: {torch.cuda.is_available()}")
# True
print(f"CUDA device: {torch.cuda.get_device_name(torch.cuda.current_device())}")
# Tesla T4

_TITLE = '''SyncDreamer: Generating Multiview-consistent Images from a Single-view Image'''
_DESCRIPTION = '''
<div>
<a style="display:inline-block" href="https://liuyuan-pal.github.io/SyncDreamer/"><img src="https://img.shields.io/badge/SyncDremer-Homepage-blue"></a>
<a style="display:inline-block; margin-left: .5em" href="https://arxiv.org/abs/2309.03453"><img src="https://img.shields.io/badge/2309.03453-f9f7f7?logo=data:image/png;base64,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"></a>
<a style="display:inline-block; margin-left: .5em" href='https://github.com/liuyuan-pal/SyncDreamer'><img src='https://img.shields.io/github/stars/liuyuan-pal/SyncDreamer?style=social' /></a>
</div>
Given a single-view image, SyncDreamer is able to generate multiview-consistent images, which enables direct 3D reconstruction with NeuS or NeRF without SDS loss

1. Upload the image.
2. Predict the mask for the foreground object.
3. Crop the foreground object.
4. Generate multiview images.
'''
_USER_GUIDE0 = "Step0: Please upload an image in the block above (or choose an example above). We use alpha values as object masks if given."
_USER_GUIDE1 = "Step1: Please select a crop size using the glider."
_USER_GUIDE2 = "Step2: Please choose a suitable elevation angle and then click the Generate button."
_USER_GUIDE3 = "Generated multiview images are shown below!"

deployed = True

def resize_inputs(image_input, crop_size):
    alpha_np = np.asarray(image_input)[:, :, 3]
    coords = np.stack(np.nonzero(alpha_np), 1)[:, (1, 0)]
    min_x, min_y = np.min(coords, 0)
    max_x, max_y = np.max(coords, 0)
    ref_img_ = image_input.crop((min_x, min_y, max_x, max_y))
    h, w = ref_img_.height, ref_img_.width
    scale = crop_size / max(h, w)
    h_, w_ = int(scale * h), int(scale * w)
    ref_img_ = ref_img_.resize((w_, h_), resample=Image.BICUBIC)
    results = add_margin(ref_img_, size=256)
    return results

def generate(model, batch_view_num, sample_num, cfg_scale, seed, image_input, elevation_input):
    seed=int(seed)
    torch.random.manual_seed(seed)
    np.random.seed(seed)

    # prepare data
    image_input = np.asarray(image_input)
    image_input = image_input.astype(np.float32) / 255.0
    alpha_values = image_input[:,:, 3:]
    image_input[:, :, :3] = alpha_values * image_input[:,:, :3] + 1 - alpha_values # white background
    image_input = image_input[:, :, :3] * 2.0 - 1.0
    image_input = torch.from_numpy(image_input.astype(np.float32))
    elevation_input = torch.from_numpy(np.asarray([np.deg2rad(elevation_input)], np.float32))
    data = {"input_image": image_input, "input_elevation": elevation_input}
    for k, v in data.items():
        if deployed:
            data[k] = v.unsqueeze(0).cuda()
        else:
            data[k] = v.unsqueeze(0)
        data[k] = torch.repeat_interleave(data[k], sample_num, dim=0)

    if deployed:
        x_sample = model.sample(data, cfg_scale, batch_view_num)
    else:
        x_sample = torch.zeros(sample_num, 16, 3, 256, 256)

    B, N, _, H, W = x_sample.shape
    x_sample = (torch.clamp(x_sample,max=1.0,min=-1.0) + 1) * 0.5
    x_sample = x_sample.permute(0,1,3,4,2).cpu().numpy() * 255
    x_sample = x_sample.astype(np.uint8)

    results = []
    for bi in range(B):
        results.append(np.concatenate([x_sample[bi,ni] for ni in range(N)], 1))
    results = np.concatenate(results, 0)
    return Image.fromarray(results)

def white_background(img):
    img = np.asarray(img,np.float32)/255
    rgb = img[:,:,3:] * img[:,:,:3] + 1 - img[:,:,3:]
    rgb = (rgb*255).astype(np.uint8)
    return Image.fromarray(rgb)

def sam_predict(predictor, raw_im):
    raw_im.thumbnail([512, 512], Image.Resampling.LANCZOS)
    image_nobg = remove(raw_im.convert('RGBA'), alpha_matting=True)
    arr = np.asarray(image_nobg)[:, :, -1]
    x_nonzero = np.nonzero(arr.sum(axis=0))
    y_nonzero = np.nonzero(arr.sum(axis=1))
    x_min = int(x_nonzero[0].min())
    y_min = int(y_nonzero[0].min())
    x_max = int(x_nonzero[0].max())
    y_max = int(y_nonzero[0].max())
    # image_nobg.save('./nobg.png')

    image_nobg.thumbnail([512, 512], Image.Resampling.LANCZOS)
    image_sam = sam_out_nosave(predictor, image_nobg.convert("RGB"), (x_min, y_min, x_max, y_max))

    # imsave('./mask.png', np.asarray(image_sam)[:,:,3]*255)
    image_sam = np.asarray(image_sam, np.float32) / 255
    out_mask = image_sam[:, :, 3:]
    out_rgb = image_sam[:, :, :3] * out_mask + 1 - out_mask
    out_img = (np.concatenate([out_rgb, out_mask], 2) * 255).astype(np.uint8)

    image_sam = Image.fromarray(out_img, mode='RGBA')
    # image_sam.save('./output.png')
    torch.cuda.empty_cache()
    return image_sam

def run_demo():
    # device = f"cuda:0" if torch.cuda.is_available() else "cpu"
    # models = None # init_model(device, os.path.join(code_dir, ckpt))
    cfg = 'configs/syncdreamer.yaml'
    ckpt = 'ckpt/syncdreamer-pretrain.ckpt'
    config = OmegaConf.load(cfg)
    # model = None
    if deployed:
        model = instantiate_from_config(config.model)
        print(f'loading model from {ckpt} ...')
        ckpt = torch.load(ckpt,map_location='cpu')
        model.load_state_dict(ckpt['state_dict'], strict=True)
        model = model.cuda().eval()
        del ckpt
    else:
        model = None

    # init sam model
    mask_predictor = sam_init()

    # with open('instructions_12345.md', 'r') as f:
    #     article = f.read()

    # NOTE: Examples must match inputs
    example_folder = os.path.join(os.path.dirname(__file__), 'hf_demo', 'examples')
    example_fns = os.listdir(example_folder)
    example_fns.sort()
    examples_full = [os.path.join(example_folder, x) for x in example_fns if x.endswith('.png')]

    # Compose demo layout & data flow.
    with gr.Blocks(title=_TITLE, css="hf_demo/style.css") as demo:
        with gr.Row():
            with gr.Column(scale=1):
                gr.Markdown('# ' + _TITLE)
            # with gr.Column(scale=0):
            #     gr.DuplicateButton(value='Duplicate Space for private use', elem_id='duplicate-button')
        gr.Markdown(_DESCRIPTION)

        with gr.Row(variant='panel'):
            with gr.Column(scale=1):
                image_block = gr.Image(type='pil', image_mode='RGBA', height=256, label='Input image', tool=None, interactive=True)
                guide_text = gr.Markdown(_USER_GUIDE0, visible=True)
                gr.Examples(
                    examples=examples_full,  # NOTE: elements must match inputs list!
                    inputs=[image_block],
                    outputs=[image_block],
                    cache_examples=False,
                    label='Examples (click one of the images below to start)',
                    examples_per_page=40
                )


            with gr.Column(scale=1):
                sam_block = gr.Image(type='pil', image_mode='RGBA', label="SAM output", height=256, interactive=False)
                crop_size_slider = gr.Slider(120, 240, 200, step=10, label='Crop size', interactive=True)
                crop_btn = gr.Button('Crop the image', variant='primary', interactive=True)
                fig0 = gr.Image(value=Image.open('assets/crop_size.jpg'), type='pil', image_mode='RGB', height=256, show_label=False, tool=None, interactive=False)

            with gr.Column(scale=1):
                input_block = gr.Image(type='pil', image_mode='RGBA', label="Input to SyncDreamer", height=256, interactive=False)
                elevation = gr.Slider(-10, 40, 30, step=5, label='Elevation angle', interactive=True)
                cfg_scale = gr.Slider(1.0, 5.0, 2.0, step=0.1, label='Classifier free guidance', interactive=True)
                sample_num = gr.Slider(1, 2, 1, step=1, label='Sample num', interactive=True, info='How many instance (16 images per instance)')
                batch_view_num = gr.Slider(1, 16, 16, step=1, label='Batch num', interactive=True)
                seed = gr.Number(6033, label='Random seed', interactive=True)
                run_btn = gr.Button('Run Generation', variant='primary', interactive=True)
                fig1 = gr.Image(value=Image.open('assets/elevation.jpg'), type='pil', image_mode='RGB', height=256, show_label=False, tool=None, interactive=False)

        output_block = gr.Image(type='pil', image_mode='RGB', label="Outputs of SyncDreamer", height=256, interactive=False)

        update_guide = lambda GUIDE_TEXT: gr.update(value=GUIDE_TEXT)
        image_block.change(fn=partial(sam_predict, mask_predictor), inputs=[image_block], outputs=[sam_block], queue=False)\
                   .success(fn=partial(update_guide, _USER_GUIDE1), outputs=[guide_text], queue=False)

        crop_size_slider.change(fn=resize_inputs, inputs=[sam_block, crop_size_slider], outputs=[input_block], queue=False)\
                        .success(fn=partial(update_guide, _USER_GUIDE2), outputs=[guide_text], queue=False)
        crop_btn.click(fn=resize_inputs, inputs=[sam_block, crop_size_slider], outputs=[input_block], queue=False)\
                       .success(fn=partial(update_guide, _USER_GUIDE2), outputs=[guide_text], queue=False)

        run_btn.click(partial(generate, model), inputs=[batch_view_num, sample_num, cfg_scale, seed, input_block, elevation], outputs=[output_block], queue=False)\
               .success(fn=partial(update_guide, _USER_GUIDE3), outputs=[guide_text], queue=False)

    demo.queue().launch(share=False, max_threads=80)  # auth=("admin", os.environ['PASSWD'])

if __name__=="__main__":
    fire.Fire(run_demo)