"""
slck: Slack Status CLI

Facilitates setting Slack status text/emojis via the
command-line.
"""

import datetime
import pathlib
import re

import click
import pydantic
import slack_sdk
import yaml


class ProfilePayload(pydantic.BaseModel):
    """Profile payload sent to Slack's API."""

    status_text: str = ""
    status_emoji: str | None = ""
    status_expiration: int | None = 0


class Preset(pydantic.BaseModel):
    """Represents a set of value used as a preset."""

    text: str
    emoji: str | None = ""
    duration: str | None = ""


class Configuration(pydantic.BaseModel):
    """Tool configuration."""

    token: str
    presets: dict[str, Preset] | None


def get_client(token: str) -> slack_sdk.WebClient:
    """Returns an authenticated API client."""
    return slack_sdk.WebClient(token=token)


def parse_duration(duration: str) -> int:
    """Parses duration descriptors of the form xdyhzm (x,y,z integers) into timestamps relative to present."""
    duration_pattern = re.compile(r"(?P<days>\d+d)?(?P<hours>\d+h)?(?P<minutes>\d+m)?")
    matches = duration_pattern.search(duration)

    delta = datetime.timedelta()

    if matches.group("days"):
        delta += datetime.timedelta(days=int(matches.group("days").rstrip("d")))
    if matches.group("hours"):
        delta += datetime.timedelta(hours=int(matches.group("hours").rstrip("h")))
    if matches.group("minutes"):
        delta += datetime.timedelta(minutes=int(matches.group("minutes").rstrip("m")))

    return (datetime.datetime.now() + delta).timestamp()


def get_configuration(path: str) -> Configuration:
    """Loads configuration from file."""
    conf_path = pathlib.Path(path)

    if not conf_path.exists():
        raise RuntimeError(f"Configuration file not found: {path}")

    with open(conf_path, "r", encoding="utf8") as conf_file:
        return Configuration(**yaml.safe_load(conf_file))


@click.command()
@click.option("--text", "-t", help="Status text.")
@click.option("--emoji", "-e", help="Emoji attached to the status.")
@click.option("--duration", "-d", help="Duration of the status.")
@click.option("--preset", "-p", help="Preset for text/emoji combinations.")
@click.option("--config", "-c", "config_path", help="Path to configuration.")
def cli(
    *,
    text: str = None,
    emoji: str = None,
    duration: str = None,
    preset: str = None,
    config_path: str = None,
):
    if text is None and preset is None:
        raise RuntimeError(
            "Must specify either status text via --text/-t or a preset via --preset/-p."
        )

    conf = get_configuration(config_path)

    status_text, status_emoji, status_exp = None, None, 0

    if preset is not None and preset in conf.presets:
        preset_data = conf.presets[preset]
        status_text = preset_data.text if preset_data.text else status_text
        status_emoji = preset_data.emoji if preset_data.emoji else status_emoji
        status_exp = (
            parse_duration(preset_data.duration) if preset_data.duration else status_exp
        )
    elif preset is not None:
        raise RuntimeError(f"Unknown preset: {preset}")

    if text is not None:
        status_text = text

    if emoji is not None:
        status_emoji = emoji

    if duration is not None:
        status_exp = parse_duration(duration)

    payload = ProfilePayload(
        status_text=status_text,
        status_emoji=status_emoji,
        status_expiration=int(status_exp),
    )
    client = get_client(conf.token)
    api_response = client.users_profile_set(profile=payload.model_dump())

    if not api_response.get("ok", False):
        raise RuntimeError("Failed to set status!")


def run():
    """Entrypoint."""
    try:
        cli()
    except Exception as e:
        click.echo(e)