import os
import torch
import sys
import spaces #fixme

import random
import gradio as gr
import random
from configs.infer_config import get_parser
from huggingface_hub import hf_hub_download

traj_examples = [
    ['0 -35; 0 0; 0 -0.1'],
    ['0 -3 -15 -20 -17 -5 0; 0 -2 -5 -10 -8 -5 0 2 5 3 0; 0 0'],
    ['0 3 10 20 17 10 0; 0 -2 -8 -6 0 2 5 3 0; 0 -0.02 -0.09 -0.16 -0.09 0'],
    ['0 30; 0 -1 -5 -4 0 1 5 4 0; 0 -0.2'],
]


img_examples = [
    ['test/images/boy.png',0,1],
    ['test/images/car.jpeg',5,1],
    ['test/images/fruit.jpg',5,1],
    ['test/images/room.png',10,1],
    ['test/images/castle.png',-4,1],
]

max_seed = 2 ** 31

def download_model():
    REPO_ID = 'Drexubery/ViewCrafter_25'
    filename_list = ['model.ckpt']
    for filename in filename_list:
        local_file = os.path.join('./checkpoints/', filename)
        if not os.path.exists(local_file):
            hf_hub_download(repo_id=REPO_ID, filename=filename, local_dir='./checkpoints/', force_download=True)
    
download_model() #fixme
parser = get_parser() # infer_config.py
opts = parser.parse_args() # default device: 'cuda:0'
tmp = str(random.randint(10**(5-1), 10**5 - 1))
opts.save_dir = f'./{tmp}'
os.makedirs(opts.save_dir,exist_ok=True)
test_tensor = torch.Tensor([0]).cuda()
opts.device = str(test_tensor.device)
opts.config = './configs/inference_pvd_1024_gradio.yaml' #fixme
# opts.config = './configs/inference_pvd_1024_local.yaml' #fixme

# install pytorch3d # fixme
pyt_version_str=torch.__version__.split("+")[0].replace(".", "")
version_str="".join([
    f"py3{sys.version_info.minor}_cu",
    torch.version.cuda.replace(".",""),
    f"_pyt{pyt_version_str}"
])
print(version_str)
os.system(f"{sys.executable} -m pip install --no-index --no-cache-dir pytorch3d -f https://dl.fbaipublicfiles.com/pytorch3d/packaging/wheels/{version_str}/download.html")
os.system("mkdir -p checkpoints/ && wget https://download.europe.naverlabs.com/ComputerVision/DUSt3R/DUSt3R_ViTLarge_BaseDecoder_512_dpt.pth -P checkpoints/")
print(f'>>> System info: {version_str}')


from viewcrafter import ViewCrafter


CAMERA_MOTION_MODE = ["Basic Camera Trajectory", "Custom Camera Trajectory"]


def show_traj(mode):
    if mode == 'Left':
        return gr.update(value='0 -35; 0 0; 0 0',visible=True),gr.update(visible=False)
    elif mode == 'Right':
        return gr.update(value='0 35; 0 0; 0 0',visible=True),gr.update(visible=False)
    elif mode == 'Up':
        return gr.update(value='0 0; 0 -30; 0 0',visible=True),gr.update(visible=False)
    elif mode == 'Down':
        return gr.update(value='0 0; 0 20; 0 0',visible=True), gr.update(visible=False)
    elif mode == 'Zoom in':
        return gr.update(value='0 0; 0 0; 0 -0.4',visible=True), gr.update(visible=False)
    elif mode == 'Zoom out':
        return gr.update(value='0 0; 0 0; 0 0.4',visible=True), gr.update(visible=False)
    elif mode == 'Customize':
        return gr.update(value='0 0; 0 0; 0 0',visible=True), gr.update(visible=True)
    elif mode == 'Reset':
        return gr.update(value='0 0; 0 0; 0 0',visible=False), gr.update(visible=False)

def viewcrafter_demo(opts):
    css = """#input_img {max-width: 1024px !important} #output_vid {max-width: 1024px; max-height:576px} #random_button {max-width: 100px !important}"""
    image2video = ViewCrafter(opts, gradio = True)
    image2video.run_both = spaces.GPU(image2video.run_both, duration=290) # fixme
    with gr.Blocks(analytics_enabled=False, css=css) as viewcrafter_iface:
        gr.Markdown("<div align='center'> <h1> ViewCrafter: Taming Video Diffusion Models for High-fidelity Novel View Synthesis </span> </h1> \
                      <h2 style='font-weight: 450; font-size: 1rem; margin: 0rem'>\
                        <a href='https://scholar.google.com/citations?user=UOE8-qsAAAAJ&hl=zh-CN'>Wangbo Yu</a>, \
                        <a href='https://doubiiu.github.io/'>Jinbo Xing</a>, <a href=''>Li Yuan</a>, \
                        <a href='https://wbhu.github.io/'>Wenbo Hu</a>, <a href='https://xiaoyu258.github.io/'>Xiaoyu Li</a>,\
                        <a href=''>Zhipeng Huang</a>, <a href='https://scholar.google.com/citations?user=qgdesEcAAAAJ&hl=en/'>Xiangjun Gao</a>,\
                        <a href='https://www.cse.cuhk.edu.hk/~ttwong/myself.html/'>Tien-Tsin Wong</a>,\
                        <a href='https://scholar.google.com/citations?hl=en&user=4oXBp9UAAAAJ&view_op=list_works&sortby=pubdate/'>Ying Shan</a>\
                        <a href=''>Yonghong Tian</a>\
                    </h2> \
                     <a style='font-size:18px;color: #000000' href='https://arxiv.org/abs/2409.02048'> [ArXiv] </a>\
                     <a style='font-size:18px;color: #000000' href='https://drexubery.github.io/ViewCrafter/'> [Project Page] </a>\
                     <a style='font-size:18px;color: #FF5DB0' href='https://github.com/Drexubery/ViewCrafter'> [Github] </a>\
                     <a style='font-size:18px;color: #000000' href='https://www.youtube.com/watch?v=WGIEmu9eXmU'> [Video] </a> </div>")


        with gr.Row():
            with gr.Column():
                # # step 1: input an image
                # gr.Markdown("---\n## Step 1: Input an Image, selet an elevation angle and a center_scale factor", show_label=False, visible=True)
                # gr.Markdown("<div align='left' style='font-size:18px;color: #000000'>1. Estimate an elevation angle  that represents the angle at which the image was taken; a value bigger than 0 indicates a top-down view, and it doesn't need to be precise. <br>2. The origin of the world coordinate system is by default defined at the point cloud corresponding to the center pixel of the input image. You can adjust the position of the origin by modifying center_scale; a value smaller than 1 brings the origin closer to you.</div>")

                with gr.Column():
                    i2v_input_image = gr.Image(label="Input Image",elem_id="input_img")
                    with gr.Row():
                        i2v_elevation = gr.Slider(minimum=-45, maximum=45, step=1, elem_id="elevation", label="elevation", value=5)
                        i2v_center_scale = gr.Slider(minimum=0.1, maximum=2, step=0.1, elem_id="i2v_center_scale", label="center_scale", value=1)
                with  gr.Column():
                    with gr.Row():
                        left = gr.Button(value = "Left")
                        right = gr.Button(value = "Right")
                        up = gr.Button(value = "Up")
                    with gr.Row(): 
                        down = gr.Button(value = "Down")                              
                        zin = gr.Button(value = "Zoom in")
                        zout = gr.Button(value = "Zoom out")
                    with gr.Row(): 
                        custom = gr.Button(value = "Customize")
                        reset = gr.Button(value = "Reset")

                with gr.Column():
                     with gr.Row():
                        with gr.Column():
                            i2v_pose = gr.Text(value = '0 0; 0 0; 0 0', label="Camera trajectory (d_phi sequence; d_theta sequence; d_r sequence)",visible=False)
                            with gr.Column(visible=False) as i2v_egs:
                                gr.Markdown("<div align='left' style='font-size:18px;color: #000000'>Please refer to the <a href='https://github.com/Drexubery/ViewCrafter/blob/main/docs/gradio_tutorial.md' target='_blank'>tutorial</a> for customizing camera trajectory.</div>")
                                gr.Examples(examples=traj_examples,
                                        inputs=[i2v_pose],
                                    )     


            # step 3 - Generate video
            with gr.Column():
                # gr.Markdown("---\n## Step 3: Generate video", show_label=False, visible=True)
                # gr.Markdown("<div align='left' style='font-size:18px;color: #000000'> You can reduce the sampling steps for faster inference; try different random seed if the result is not satisfying. </div>")
                i2v_output_video = gr.Video(label="Generated Video",elem_id="output_vid",autoplay=True,show_share_button=True)
                with gr.Row():
                    i2v_steps = gr.Slider(minimum=1, maximum=50, step=1, elem_id="i2v_steps", label="Sampling steps", value=50)
                    i2v_seed = gr.Slider(label='Random seed', minimum=0, maximum=max_seed, step=1, value=0)
                i2v_end_btn = gr.Button("Generate video")                    
                i2v_traj_video = gr.Video(label="Camera Trajectory",elem_id="traj_vid",autoplay=True,show_share_button=True)

                
        gr.Examples(examples=img_examples,
            inputs=[i2v_input_image,i2v_elevation, i2v_center_scale,],
            # examples_per_page=6
        )            



        i2v_end_btn.click(inputs=[i2v_input_image, i2v_elevation, i2v_center_scale, i2v_pose, i2v_steps, i2v_seed],
                        outputs=[i2v_output_video,i2v_traj_video],
                        fn = image2video.run_both
        )

        left.click(inputs=[left],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )
        right.click(inputs=[right],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )
        up.click(inputs=[up],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )
        down.click(inputs=[down],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )
        zin.click(inputs=[zin],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )
        zout.click(inputs=[zout],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )
        custom.click(inputs=[custom],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )
        reset.click(inputs=[reset],
                      outputs=[i2v_pose,i2v_egs],
                      fn = show_traj
                      )

    return viewcrafter_iface


viewcrafter_iface = viewcrafter_demo(opts)
viewcrafter_iface.queue(max_size=10)
viewcrafter_iface.launch() #fixme
# viewcrafter_iface.launch(server_name='11.220.92.96', server_port=80, max_threads=10,debug=True)