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from collections.abc import Sequence
import random

import gradio as gr
import immutabledict
import spaces
import torch


#### Version 1: Baseline
# Step 1: Select and load your model
# Step 2: Load the test dataset (4-5 examples)
# Step 3: Run generation with and wihtout watermarking, display the outputs
# Step 4: User clicks the reveal button to see the watermarked vs not gens

#### Version 2: Gamification
# Stesp 1-3 the same
# Step 4: User marks specific generations as watermarked
# Step 5: User clicks the reveal button to see the watermarked vs not gens

# If the watewrmark is not detected, consider the use case. Could be because of
# the nature of the task (e.g., fatcual responses are lower entropy) or it could
# be another

GEMMA_2B = 'google/gemma-2b'

PROMPTS: tuple[str] = (
    'prompt 1',
    'prompt 2',
    'prompt 3',
    'prompt 4',
)

WATERMARKING_CONFIG = immutabledict.immutabledict({
    "ngram_len": 5,
    "keys": [
        654,
        400,
        836,
        123,
        340,
        443,
        597,
        160,
        57,
        29,
        590,
        639,
        13,
        715,
        468,
        990,
        966,
        226,
        324,
        585,
        118,
        504,
        421,
        521,
        129,
        669,
        732,
        225,
        90,
        960,
    ],
    "sampling_table_size": 2**16,
    "sampling_table_seed": 0,
    "context_history_size": 1024,
    "device": (
        torch.device("cuda:0")
        if torch.cuda.is_available()
        else torch.device("cpu")
    ),
})

_CORRECT_ANSWERS: dict[str, bool] = {}

with gr.Blocks() as demo:
  prompt_inputs = [
      gr.Textbox(value=prompt, lines=4, label='Prompt')
      for prompt in PROMPTS
  ]
  generate_btn = gr.Button('Generate')

  with gr.Column(visible=False) as generations_col:
    generations_grp = gr.CheckboxGroup(
        label='All generations, in random order',
        info='Select the generations you think are watermarked!',
    )
    reveal_btn = gr.Button('Reveal', visible=False)

  with gr.Column(visible=False) as detections_col:
    revealed_grp = gr.CheckboxGroup(
        label='Ground truth for all generations',
        info=(
            'Watermarked generations are checked, and your selection are '
            'marked as correct or incorrect in the text.'
        ),
    )
    detect_btn = gr.Button('Detect', visible=False)

  def generate(*prompts) -> Sequence[str]:
    standard = [f'{prompt} response' for prompt in prompts]
    watermarked = [f'{prompt} watermarked response' for prompt in prompts]
    responses = standard + watermarked
    random.shuffle(responses)

    _CORRECT_ANSWERS.update({
      response: response in watermarked
      for response in responses
    })

    # Load model
    return {
        generate_btn: gr.Button(visible=False),
        generations_col: gr.Column(visible=True),
        generations_grp: gr.CheckboxGroup(
            responses,
        ),
        reveal_btn: gr.Button(visible=True),
    }

  generate_btn.click(
     generate,
     inputs=prompt_inputs,
     outputs=[generate_btn, generations_col, generations_grp, reveal_btn]
  )

  def reveal(user_selections: list[str]):
    choices: list[str] = []
    value: list[str] = []

    for response, is_watermarked in _CORRECT_ANSWERS.items():
      if is_watermarked and response in user_selections:
        choice = f'Correct! {response}'
      elif not is_watermarked and response not in user_selections:
        choice = f'Correct! {response}'
      else:
        choice = f'Incorrect. {response}'

      choices.append(choice)
      if is_watermarked:
        value.append(choice)

    return {
      reveal_btn: gr.Button(visible=False),
      detections_col: gr.Column(visible=True),
      revealed_grp: gr.CheckboxGroup(choices=choices, value=value),
      detect_btn: gr.Button(visible=True),
    }

  reveal_btn.click(
    reveal,
    inputs=generations_grp,
    outputs=[
        reveal_btn,
        detections_col,
        revealed_grp,
        detect_btn
    ],
  )

if __name__ == '__main__':
  demo.launch()