from fastapi import FastAPI, HTTPException
from models import CVExtracted, EvaModul, JobAndCV, ClassificationResult, InsertedLink, EvalResult
import os
from io import BytesIO
# import extractor
import extractor_llm
from datetime import datetime
from pypdf import PdfReader
import requests
import classificator
import evaluator
import extractor_helper

os.environ['TRANSFORMERS_CACHE'] = '/transformers_cache'
os.environ['HF_HOME'] = '/transformers_cache'



app =  FastAPI()
@app.get("/", response_model=dict[str, str])
def getall():
    return {"hello":"world"}


# @app.post("/ext", response_model=CVExtracted)
# async def extract(text: InsertedText):
#     dictresult = extractor.predict(text.text)
#     return CVExtracted(**dictresult)


@app.post("/classify", response_model=ClassificationResult)
async def classify(body:JobAndCV):
    mininmal_start = 0
    maximal_end = 0
    positions = []
    userMajors = []
    yoe = 0
    if len(body.cv.experiences) > 0:
        mininmal_start = datetime.strptime(body.cv.experiences[0]['start'], "%Y-%m-%d").date() if body.cv.experiences[0].get('start') != None else datetime.today().date()
        maximal_end = datetime.strptime(body.cv.experiences[0]['end'], "%Y-%m-%d").date() if body.cv.experiences[0].get('end') != None else datetime.today().date()
        for exp in body.cv.experiences:
            positions.append(exp['position'])
            if exp.get('end') == None:
                exp['end'] = datetime.today().strftime("%Y-%m-%d")
            if datetime.strptime(exp['start'], "%Y-%m-%d").date() < mininmal_start:
                mininmal_start = datetime.strptime(exp['start'], "%Y-%m-%d").date()
            if datetime.strptime(exp['end'], "%Y-%m-%d").date() > maximal_end:
                maximal_end = datetime.strptime(exp['end'], "%Y-%m-%d").date()
        yoe = (maximal_end - mininmal_start).days//365  
    
    for edu in body.cv.educations:
        userMajors.append(edu['major'])
    
    cv = {
        "experiences": str(body.cv.experiences), 
        "positions": str(positions), 
        "userMajors": str(userMajors), 
        "skills": str(body.cv.skills), 
        "yoe": yoe,
        "location": str(body.cv.location)
    }
    job = {
        "jobDesc": body.job.jobDesc, 
        "role": body.job.role, 
        "majors": str(body.job.majors), 
        "skills": str(body.job.skills), 
        "minYoE": body.job.minYoE,
        "location": str(body.job.location)
    }
    weight = body.weight.dict()
    results = classificator.predict(cv, job, weight)
    return ClassificationResult(**results)

@app.post("/cv", response_model=CVExtracted)
async def extract(link: InsertedLink):
    response = requests.get(link.link)
    if response.status_code == 200:
        # Open the PDF from bytes in memory
        pdf_reader = PdfReader(BytesIO(response.content))
        number_of_pages = len(pdf_reader.pages)
        # Optionally, read text from the first page
        page = pdf_reader.pages[0]
        text = page.extract_text()
        for i in range(1, number_of_pages):
            text+= '\n' + pdf_reader.pages[i].extract_text()
    else:
        #return error, make 500 because file server error
        raise HTTPException(status_code=response.status_code, detail="File server error")

    dictresult = extractor_llm.predict(text)
    return dictresult



@app.post("/eval", response_model=EvalResult)
async def eval(eva: EvaModul):
    transcript = extractor_helper.extract_technical(eva.competences, eva.transcript)
    return evaluator.evaluate_interview(competences=eva.competences, transcript=transcript, lang=eva.lang)