import os.path
from datetime import datetime
import locale

from markdown.preprocessors import Preprocessor
from pelican import signals
from pelican.readers import Markdown, MarkdownReader, pelican_open
from pelican.utils import get_date, slugify
import re

locale.setlocale(locale.LC_TIME, "fr_FR")


class WorklogPreprocessor(Preprocessor):
    pattern = re.compile(
        r"""
        (\w+)\s+                      # Day name
        (\d{1,2})\s+                  # Day number
        ([\wéû]+)\s+                  # Month name
        (\d{4})\s+                    # Year
        \(
        (\d{1,2})h                    # Hours (mandatory)
        (?:\s+facturées)?             # Optionally 'facturées', if not present, assume hours are 'facturées'
        (?:,\s*(\d{1,2})h\s*bénévoles)? # Optionally 'volunteer hours 'bénévoles'
        ,?                            # An optional comma
        \s*                           # Optional whitespace
        (?:plaisir\s+)?               # Optionally 'plaisir' (text) followed by whitespace
        (\d)/5                        # Happiness rating (mandatory, always present)
        \)                            # Closing parenthesis
        """,
        re.VERBOSE | re.UNICODE,
    )

    def __init__(self, *args, **kwargs):
        self.data = {}
        super().__init__(*args, **kwargs)

    def run(self, lines):
        new_lines = []
        for line in lines:
            if line.startswith("##"):
                match = re.search(self.pattern, line)
                print(match)
                if match:
                    (
                        day_of_week,
                        day,
                        month,
                        year,
                        payed_hours,
                        volonteer_hours,
                        happiness,
                    ) = match.groups()

                    volonteer_hours = int(volonteer_hours) if volonteer_hours else 0
                    payed_hours = int(payed_hours)
                    happiness = int(happiness)

                    date = datetime.strptime(f"{day} {month} {year}", "%d %B %Y")
                    self.data[date.strftime("%Y-%m-%d")] = {
                        "payed_hours": payed_hours,
                        "volonteer_hours": volonteer_hours,
                        "happyness": happiness,
                    }

                    # Replace the line with just the date
                    new_lines.append(f"## 🗓️ {day_of_week} {day} {month} {year}")
                else:
                    new_lines.append(line)
            else:
                new_lines.append(line)
        return new_lines


class SimpleReader(MarkdownReader):
    enabled = True

    file_extensions = ["md"]

    def __init__(self, *args, **kwargs):
        super(SimpleReader, self).__init__(*args, **kwargs)
        self.settings["MARKDOWN"]["extensions"].append("markdown.extensions.toc")

    def read(self, source_path):
        self._source_path = source_path
        self._md = Markdown(**self.settings["MARKDOWN"])

        worklog = WorklogPreprocessor(self._md)
        if "worklog" in source_path:
            self._md.preprocessors.register(worklog, "worklog", 20)

        with pelican_open(source_path) as text:
            content = self._md.convert(text)

        if hasattr(self._md, "Meta"):
            metadata = self._parse_metadata(self._md.Meta)
        else:
            metadata = {}

        # Add the worklog info to the metadata
        if "worklog" in source_path:
            done_hours = sum([item["payed_hours"] for item in worklog.data.values()])
            total_hours = int(metadata["total_days"]) * 8
            metadata["worklog"] = {
                "data": worklog.data,
                "total_hours": total_hours,
                "done_hours": done_hours,
                "percentage": round(done_hours / total_hours * 100),
            }
            print(metadata)

        # Add the TOC to the metadata.
        if len(self._md.toc) > 300:
            metadata["table_of_contents"] = self._md.toc

        # Get the title from the first title
        if "title" not in metadata and len(self._md.toc_tokens):
            first_title = self._md.toc_tokens[0]
            metadata["title"] = first_title["name"]
            content = content.replace(
                '<h1 id="{id}">{name}</h1>'.format(**first_title), ""
            )

        # Get the date from the filename, if possible.
        parts = os.path.splitext(os.path.basename(source_path))[0].split("-")
        if len(parts) > 3:
            metadata["date"] = get_date("-".join(parts[:3]))

        if "slug" not in metadata:
            metadata["slug"] = slugify(
                metadata["title"], self.settings.get("SLUG_REGEX_SUBSTITUTIONS", [])
            )

        category = os.path.basename(
            os.path.abspath(os.path.join(source_path, os.pardir))
        )
        metadata["category"] = self.process_metadata("category", category)
        return content, metadata


def add_reader(readers):
    readers.reader_classes["md"] = SimpleReader


# This is how pelican works.
def register():
    signals.readers_init.connect(add_reader)