from fastapi import FastAPI, Request, Form, File, UploadFile
from fastapi.templating import Jinja2Templates
from fastapi.staticfiles import StaticFiles
from fastapi.responses import HTMLResponse
import pandas as pd
import requests
from bs4 import BeautifulSoup
from cleantext import clean
from docx import Document
import os
import ssl
import cohere
from cohere import CohereError
import string
import numpy as np
from numpy.linalg import norm
from nltk.tokenize import SpaceTokenizer
import nltk
from transformers import pipeline, AutoTokenizer, AutoModelForSequenceClassification
from dotenv import load_dotenv
load_dotenv()

try:
    _create_unverified_https_context = ssl._create_unverified_context
except AttributeError:
    pass
else:
    ssl._create_default_https_context = _create_unverified_https_context
if os.path.isdir('nltk_data')==False:
    nltk.download('stopwords', quiet=True)

app = FastAPI()
app.mount("/static", StaticFiles(directory='static'), name="static")
templates = Jinja2Templates(directory="templates/")

onet = pd.read_csv('static/ONET_JobTitles.csv')
simdat = pd.read_csv('static/cohere_embeddings.csv')
coheredat = pd.read_csv("static/cohere_tSNE_dat.csv")

model = AutoModelForSequenceClassification.from_pretrained('static/model_shards', low_cpu_mem_usage=True)
tokenizer = AutoTokenizer.from_pretrained('static/tokenizer_shards', low_cpu_mem_usage=True)
classifier = pipeline('text-classification', model = model, tokenizer = tokenizer)

### job information center ###
# get
@app.get("/")
def render_job_list(request: Request):
    joblist = onet['JobTitle']
    return templates.TemplateResponse('job_list.html', context={'request': request, 'joblist': joblist})

# post
@app.post("/")
def render_job_info(request: Request, jobtitle: str = Form(enum=[x for x in onet['JobTitle']])):
    
    def remove_new_line(value):
        return ''.join(value.splitlines())

    joblist = onet['JobTitle']

    if jobtitle: 
        onetCode = onet.loc[onet['JobTitle'] == jobtitle, 'onetCode']
        onetCode = onetCode.reindex().tolist()[0]
        headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Safari/605.1.15'}
        url = "https://www.onetonline.org/link/summary/" + onetCode
        response = requests.get(url, headers=headers)
        soup = BeautifulSoup(response.text, 'html.parser')
        jobdescription = soup.p.get_text()
                
        url = "https://www.onetonline.org/link/result/" + onetCode + "?c=tk&n_tk=0&s_tk=IM&c_tk=0"
        response = requests.get(url, headers=headers)
        soup = BeautifulSoup(response.text, 'html.parser')
        tasks = str(soup.get_text('reportsubdesc')).replace("reportsubdesc", " ").replace("ImportanceCategoryTask ", "")
        tasks = clean(tasks)
        tasks = tasks.split('show all show top 10')[1]
        tasks = tasks.split('occupations related to multiple tasks')[0]
        tasks = remove_new_line(tasks).replace("related occupations", " ").replace("core", " - ").replace(" )importance category task", "").replace(" find ", "")
        tasks = tasks.split(". ")
        tasks = [''.join(map(lambda c: '' if c in '0123456789-' else c, task)) for task in tasks]
        return templates.TemplateResponse('job_list.html', context={
            'request': request, 
            'joblist': joblist, 
            'jobtitle': jobtitle, 
            'jobdescription': jobdescription, 
            'tasks': tasks})

### job neighborhoods ###
@app.get("/explore-job-neighborhoods/", response_class=HTMLResponse)
def render_job_neighborhoods(request: Request):
    return templates.TemplateResponse('job_neighborhoods.html', context={'request': request})

### find my match ###
# get
@app.get("/find-my-match/", response_class=HTMLResponse)
async def match_page(request: Request):
    return templates.TemplateResponse('find_my_match.html', context={'request': request})

# post
@app.post('/find-my-match/', response_class=HTMLResponse)
def get_resume(request: Request, resume: UploadFile = File(...)):
    path = f"static/{resume.filename}"
    with open(path, 'wb') as buffer:
        buffer.write(resume.file.read())
    file = Document(path)
    text = []
    for para in file.paragraphs:
        text.append(para.text)
    resume = "\n".join(text)

    def clean_my_text(text):
        clean_text = ' '.join(text.splitlines())
        clean_text = clean_text.replace('-', " ").replace("/"," ")
        clean_text = clean(clean_text.translate(str.maketrans('', '', string.punctuation)))
        return clean_text

    def coSkillEmbed(text):
        try:
            co = cohere.Client(os.getenv("COHERE_TOKEN"))
            response = co.embed(
                model='large',
                texts=[text])
            return response.embeddings
        except CohereError as e:
            return e
    
    def cosine(A, B):
        return np.dot(A,B)/(norm(A)*norm(B))

    # GET RESUME EMBEDDINGS AND JOB SIMILARITY SCORES
    embeds = coSkillEmbed(resume)
    simResults = []

    for i in range(len(simdat)):
        simResults.append(cosine(np.array(embeds), np.array(simdat.iloc[i,1:])))
    simResults = pd.DataFrame(simResults)
    simResults['JobTitle'] = simdat['Title']

    simResults = simResults.iloc[:,[1,0]]
    simResults.columns = ['JobTitle', 'Similarity']
    simResults = simResults.sort_values(by = "Similarity", ascending = False)
    simResults = simResults.iloc[:13,:]
    simResults = simResults.iloc[1:,:]
    simResults.reset_index(drop=True, inplace=True)
    for x in range(len(simResults)):
        simResults.iloc[x,1] = "{:0.2f}".format(simResults.iloc[x,1])
        
    # EXTRACT SKILLS FROM RESUME 
    def skillNER(resume):
        resume = clean_my_text(resume)
        stops = set(nltk.corpus.stopwords.words('english'))
        stops = stops.union({'eg', 'ie', 'etc', 'experience', 'experiences', 'experienced', 'experiencing', 'knowledge', 
        'ability', 'abilities', 'skill', 'skills', 'skilled', 'including', 'includes', 'included', 'include'
        'education', 'follow', 'following', 'follows', 'followed', 'make', 'made', 'makes', 'making', 'maker',
        'available', 'large', 'larger', 'largescale', 'client', 'clients', 'responsible', 'x', 'many', 'team', 'teams'})
        resume = [word for word in SpaceTokenizer().tokenize(resume) if word not in stops]
        resume = [word for word in resume if ")" not in word]
        resume = [word for word in resume if "(" not in word]
            
        labels = []
        for i in range(len(resume)):
            classification = classifier(resume[i])[0]['label']
            if classification == 'LABEL_1':
                labels.append("Skill")
            else:
                labels.append("Not Skill")
            labels_dict = dict(zip(resume, labels))
        return labels_dict
    skills = skillNER(resume)
    return templates.TemplateResponse('find_my_match.html', context={'request': request, 'resume': resume, 'skills': skills, 'simResults': simResults})