import gradio as gr
import json as js
import util
from fastapi.staticfiles import StaticFiles
from fileservice import app
from pose import infer, draw


def image_changed(image):
  if image == None:
    return "estimation", {}

  if 'openpose' in image.info:
    print("pose found")
    jsonText = image.info['openpose']
    jsonObj = js.loads(jsonText)
    subset = jsonObj['subset']
    return f"""{image.width}px x {image.height}px, {len(subset)} indivisual(s)""", jsonText
  else:
    print("pose not found")
    pose_result, returned_outputs = infer(util.pil2cv(image))

    candidate = []
    subset = []
    for d in pose_result:
        n = len(candidate)
        if d['bbox'][4] < 0.9: 
            continue
        keypoints = d['keypoints'][:, :2].tolist()
        midpoint = [(keypoints[5][0] + keypoints[6][0]) / 2, (keypoints[5][1] + keypoints[6][1]) / 2]
        keypoints.append(midpoint)
        candidate.extend(util.convert_keypoints(keypoints))
        m = len(candidate)
        subset.append([j for j in range(n, m)])

    jsonText = "{ \"candidate\": " + util.candidate_to_json_string(candidate) + ", \"subset\": " + util.subset_to_json_string(subset) + " }"
    return f"""{image.width}px x {image.height}px, {len(subset)} indivisual(s)""", jsonText

html_text = f"""
    <canvas id="canvas" width="512" height="512"></canvas><img id="canvas-background" style="display:none;"/>
"""

with gr.Blocks(css="""button { min-width: 80px; }""") as demo:
  with gr.Row():
    with gr.Column(scale=1):
      width = gr.Slider(label="Width", minimum=512, maximum=1024, step=64, value=512, interactive=True)
      height = gr.Slider(label="Height", minimum=512, maximum=1024, step=64, value=512, interactive=True)
      with gr.Accordion(label="Pose estimation", open=False):
        source = gr.Image(type="pil")
        estimationResult = gr.Markdown("""estimation""")
        with gr.Row():
          with gr.Column(min_width=80):
            applySizeBtn = gr.Button(value="Apply size")
          with gr.Column(min_width=80):
            replaceBtn = gr.Button(value="Replace")
          with gr.Column(min_width=80):
            importBtn = gr.Button(value="Import")
          with gr.Column(min_width=80):
            bgBtn = gr.Button(value="Background")
      with gr.Accordion(label="Json", open=False):
        with gr.Row():
          with gr.Column(min_width=80):
            replaceWithJsonBtn = gr.Button(value="Replace")
          with gr.Column(min_width=80):
            importJsonBtn = gr.Button(value="Import")
        gr.Markdown("""
| inout            | how to                                                                               |
| -----------------| ----------------------------------------------------------------------------------------- |
| Import | Paste json to "Json source" and click "Read", edit the width/height, then click "Replace" or "Import". |
| Export | click "Save" and "Copy to clipboard" of "Json" section.                                             |
""")
        json = gr.JSON(label="Json")
        jsonSource = gr.Textbox(label="Json source", lines=10)
      with gr.Accordion(label="Notes", open=False):
        gr.Markdown("""
#### How to bring pose to ControlNet
1. Press **Save** button
2. **Drag** the file placed at the bottom left corder of browser
3. **Drop** the file into ControlNet

#### Reuse pose image
Pose image generated by this tool has pose data in the image itself. You can reuse pose information by loading it as the image source instead of a regular image.

#### Points to note for pseudo-3D rotation
When performing pseudo-3D rotation on the X and Y axes, the projection is converted to 2D and Z-axis information is lost when the mouse button is released. This means that if you finish dragging while the shape is collapsed, you may not be able to restore it to its original state. In such a case, please use the "undo" function.

#### Pose estimation
In this project, MMPose is used for pose estimation.
""")
    with gr.Column(scale=2):
      html = gr.HTML(html_text)
      with gr.Row():
        with gr.Column(scale=1, min_width=60):
          saveBtn = gr.Button(value="Save")
        with gr.Column(scale=7):
          gr.Markdown("""
- "ctrl + drag" to **scale**
- "alt + drag" to **move**
- "shift + drag" to **rotate** (move right first, release shift, then up or down)
- "space + drag" to **range-move**
- "[", "]" or "Alt + wheel" or "Space + wheel" to shrink or expand **range**
- "ctrl + Z", "shift + ctrl + Z" to **undo**, **redo**
- "ctrl + E" **add** new person
- "D + click" to **delete** person
- "Q + click" to **cut off** limb
- "X + drag" to **x-axis** pseudo-3D rotation
- "C + drag" to **y-axis** pseudo-3D rotation
- "R + click" to **repair**

When using Q, X, C, R, pressing and dont release until the operation is complete.

[Contact us for feature requests or bug reports (anonymous)](https://t.co/UC3jJOJJtS)
""")

  width.change(fn=None, inputs=[width], _js="(w) => { resizeCanvas(w,null); }")
  height.change(fn=None, inputs=[height], _js="(h) => { resizeCanvas(null,h); }")

  source.change(
    fn = image_changed,
    inputs = [source],
    outputs = [estimationResult, json])
  applySizeBtn.click(
    fn = lambda x: (x.width, x.height),
    inputs = [source], 
    outputs = [width, height])
  replaceBtn.click(
    fn = None,
    inputs = [json],
    outputs = [],
    _js="(json) => { initializeEditor(); importPose(json); return []; }")
  importBtn.click(
    fn = None,
    inputs = [json],
    outputs = [],
    _js="(json) => { importPose(json); return []; }")
  bgBtn.click(
    fn = None,
    inputs = [source],
    outputs = [],
    _js="(image) => { importBackground(image); return []; }"
  )

  saveBtn.click(
    fn = None,
    inputs = [], outputs = [json],
    _js="() => { return savePose(); }")
  jsonSource.change(
    fn = lambda x: x,
    inputs = [jsonSource], outputs = [json])
  replaceWithJsonBtn.click(
    fn = None,
    inputs = [json],
    outputs = [],
    _js="(json) => { initializeEditor(); importPose(json); return []; }")
  importJsonBtn.click(
    fn = None,
    inputs = [json],
    outputs = [],
    _js="(json) => { importPose(json); return []; }")
  demo.load(fn=None, inputs=[], outputs=[], _js="() => { initializeEditor(); importPose(); return []; }")

print("mount")
app.mount("/js", StaticFiles(directory="js"), name="js")
gr.mount_gradio_app(app, demo, path="/")