import os
import pdfplumber
from pdfminer.pdfparser import PDFSyntaxError
import re
import json
from pathlib import Path
from datetime import datetime, timedelta


def current_date_test(base_dir: str):
    today = datetime.now()
    yesterday = today - timedelta(days=1)
    current_date = [
        today.strftime("%d.%m.%Y"),
        today.strftime("%d/%m/%Y"),
        yesterday.strftime("%d.%m.%Y"),
        yesterday.strftime("%d/%m/%Y"),
    ]
    errors = {"empty": [], "outdated": []}

    files = [f for f in Path(base_dir).glob("*.pdf")]
    files_count = len(files)

    for i, f in enumerate(files):
        print(f"({i}/{files_count}) {f.name}                 ", end="\r")
        with pdfplumber.open(str(f)) as pdf:
            text = pdf.pages[0].extract_text()
            if re.search(r"\d+ von \d+$", text):
                errors["empty"].append(f.name)
            report_date = re.search(r"\d{2}[\./]\d{2}[\./]\d{4}", text.split("\n")[0])
            if report_date is not None and report_date.group() not in current_date:
                errors["outdated"].append([f.name, report_date.group()])

    print()
    print(json.dumps(errors, indent=2))


def missing_data(base_dir: str):
    for f in Path(base_dir).iterdir():
        if f.is_dir() and f.name not in [".", "..", "leer"]:
            missing_data(str(f))
    print(base_dir)
    os.makedirs(base_dir + "/leer", exist_ok=True)

    errors = []
    for f in Path(base_dir).glob("*.pdf"):
        try:
            with pdfplumber.open(str(f)) as pdf:
                pages = len(pdf.pages)
                text = pdf.pages[0].extract_text()
        except PDFSyntaxError:
            pages = 0
            text = ""

        # print(text)
        if pages < 2 and any(
            [
                re.search(r"Daten nicht verf", text),
                text.endswith("unprod.abw."),
                (len(text) < 650 and text.count("\n") < 8),
            ]
        ):
            errors.append(f.name)
            target = Path(base_dir + "/leer/" + f.name)
            target.unlink(missing_ok=True)
            f.rename(target)

    return errors


if __name__ == "__main__":
    missing_data("C:\\GlobalCube\\ReportOutput")