# Copyright Sage Vaillancourt 2021

import os
import subprocess
from dataclasses import dataclass

from flask import send_from_directory


# latex /home/sage/Documents/latex/coverLetter/temp.tex'
# dvipdf /home/sage/Documents/latex/coverLetter/temp.dvi ~/Documents/SageVaillancourt_CoverLetter.pdf'
# rm -r /home/sage/Documents/latex/coverLetter/temp*'

@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 generate(data: CLData, unique):
    import threading
    proj_dir = os.path.dirname(os.getcwd()) + '/undercover/'
    output_dir = proj_dir + 'outputs/'
    unique_file = output_dir + unique + ".tex"
    f = open(unique_file, "w")
    define(f, "username", data.username)
    define(f, "thecompany", data.company)
    define(f, "jobandpronoun", data.jobandpronoun, " ")
    define(f, "skilltypes", data.skilltypes, " ")
    define(f, "myskills", data.myskills, " ")
    define(f, "closingtext", data.closingtext)
    define(f, "body", data.body)
    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 + "'")
    #TODO: If error, don't try to return the pdf
    subprocess.run(['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
    )

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