# Copyright Sage Vaillancourt 2021

import os
import subprocess
from dataclasses import dataclass
from flask import send_from_directory


@dataclass
class CLData():
    username: str
    company: str
    jobandpronoun: str
    skilltypes: str
    myskills: str
    closingtext: str
    body: str

    def get_pairs(self):
        return [
            ("username", self.username),
            ("company", self.company),
            ("jobandpronoun", self.jobandpronoun),
            ("skilltypes", self.skilltypes),
            ("myskills", self.myskills),
            ("closingtext", self.closingtext),
            ("body", self.body),
        ]

def define(file, name, data, whitespace=""):
    file.write("\\def \\" + name + "{" + data + whitespace + "}\n")

def get_unique():
    import uuid
    unique = str(uuid.uuid1().hex)
    print("Unique ID: " + unique)
    return unique

def generate(data: CLData):
    import threading
    unique = get_unique()
    proj_dir = os.path.dirname(os.getcwd()) + '/undercover/'
    output_dir = proj_dir + 'outputs/'
    unique_file = output_dir + unique + ".tex"
    f = open(unique_file, "w")
    for pair in data.get_pairs():
        file.write("\\def \\" + pair[0] + "{" + pair[0] + "}\n")
    f.write(open(proj_dir + "/writing_templates/base.tex", "r").read())
    f.close()

    base_tex = output_dir + unique + ".tex"
    com = "pdflatex -halt-on-error -jobname=outputs/" + unique + " " + base_tex
    print("COM: '" + com + "'")
    try:
        subprocess.check_call(['bash', '-c', com])

        root_dir = os.path.dirname(os.getcwd())
        download = root_dir + '/undercover/outputs/'

        threading.Timer(60 * 30, cleanup, [output_dir + unique]).start()
        return send_from_directory(
            download,
            unique + ".pdf",
            attachment_filename=data.username.replace(" ", "") + "_CoverLetter.pdf",
            as_attachment=True
        )
    except subprocess.CalledProcessError:
        return None

def cleanup(unique):
    print(unique)
    subprocess.run(['bash', '-c', "rm " + unique + ".*"])