import streamlit as st
from PIL import Image
import numpy as np
import pubchempy as pcp
from rdkit import Chem
from rdkit.Chem import Draw
import time
import os
import random

@st.dialog("Select From Library")
def lib_modal():
    files = os.listdir("lib")
    files = random.choices(files, k=50)
    cols = st.columns(2)
    for i, file in enumerate(files):
        with cols[i % 2]:
            st.image("lib/{}".format(file), use_container_width=True)
            if st.button("Select", key=i):
                st.session_state.uploaded_file = file
                st.rerun()
            st.markdown("---")

st.title("3D2SMILES")
st.markdown("""
This app generates SMILES strings from images of molecules ball-and-stick models. 

[Version 1 Paper](https://chemrxiv.org/engage/chemrxiv/article-details/673a9d62f9980725cf89abe1) | 
[Version 2 Paper]() |
[Synthetic Dataset](https://huggingface.co/datasets/weathon/3d2smiles_synthetic) | 
[Real Dataset](https://huggingface.co/datasets/weathon/3d2smiles_real) |
[Author Github](https://github.com/weathon) |
[Feedback](mailto:wguo6358@gmail.com) | 
[Deploy](https://huggingface.co/spaces/weathon/3d2smiles?docker=true)
""")
col1, col2 = st.columns(2)
gen_strategy = col1.selectbox("Select a generative strategy", ("Beam Search", "Sampling", "Greedy Search"))
temp = col2.slider("Temperature", 0.0, 2.0, 1.0)
uploaded_file = st.file_uploader("Upload an image", type=["png", "jpg", "jpeg", "webp", "heic"])

lib = st.columns(2)
lib[0].markdown("Do not have an image? You can select a molecule from the library below.")
from_library = lib[1].button("Select from Library")
if from_library:
    lib_modal()

col1, col2 = st.columns(2)
if not "uploaded_file" in st.session_state:
    col1.checkbox("Contribute To Public Library", value=True, help="If checked, images will be included in the PUBLIC library, and the image will be reviewed by our team and used for model training. When checked, do not upload any sensitive or personal data.")
else:
    col1.checkbox("Contribute To Public Library", value=False, disabled=True, help="When using the library, this option is disabled. If you want to contribute to the library, please upload an image.")


button = col2.button("Submit")
if button:
    if uploaded_file:
        start_time = time.time()
        image = Image.open(uploaded_file)

        options = ["CC(=O)OC1=CC=CC=C1C(=C)C(=O)O", "CC(=O)", "CC(=O)O", "CC(=O)C", "CC(=O)C1=CC=CC=C1"]
        grid = [st.columns(2) for _ in range(len(options) // 3 + 1)]
        cols = [col for row in grid for col in row]

        for i, (smiles, col) in enumerate(zip(options, cols)):
            cid = pcp.get_compounds(smiles, 'smiles')
            name = cid[0].synonyms[0]
            col.markdown(name)
            m = Chem.MolFromSmiles(smiles)
            img = Draw.MolToImage(m)
            col.image(img, use_container_width=False)
            pubchem_url = "https://pubchem.ncbi.nlm.nih.gov/compound/{}".format(cid[0].cid)
            col.markdown("[PubChem]({})".format(pubchem_url))     

        st.markdown("---")
        st.markdown("Taken {} seconds".format(round(time.time() - start_time, 2)))