import glob
import hashlib

from .fep_file import FepFile


def title_to_slug(title):
    return hashlib.sha256(title.encode("utf-8")).hexdigest()[:4]


def get_fep_ids():
    for fep in glob.glob("fep/*"):
        yield fep.removeprefix("fep/")


def build_url_link(url):
    url_number = url.split("/")[-1]
    return f"[#{url_number}]({url})"


class Readme:
    @property
    def content(self):
        return self.frontmatter + self.table + self.backmatter

    @property
    def frontmatter(self):
        with open("scripts/frontmatter.md") as f:
            return f.readlines()

    @property
    def backmatter(self):
        with open("scripts/backmatter.md") as f:
            return f.readlines()

    @property
    def table(self):
        fep_files = [FepFile(fep) for fep in get_fep_ids()]
        fep_files = reversed(fep_files)
        fep_files = sorted(
            fep_files, key=lambda x: x.parsed_frontmatter["dateReceived"]
        )

        result = []

        for fep in fep_files:
            link = f"[FEP-{fep.fep}: {fep.title}](./src/branch/main/{fep.filename})"
            parsed = fep.parsed_frontmatter

            if "discussionsTo" in parsed:
                url = parsed["discussionsTo"]
                urls = url.split(", ")
                discussions = " ".join(build_url_link(url) for url in urls)
            else:
                discussions = ""

            if "dateFinalized" in parsed:
                date_final = parsed["dateFinalized"]
            elif "dateWithdrawn" in parsed:
                date_final = parsed["dateWithdrawn"]
            else:
                date_final = "-"
            result.append(
                f"""| {link} | `{parsed["status"]}` | {discussions} | {parsed["dateReceived"]} | {date_final} |\n"""
            )
        return result