import json
import os
import discord
from typing import Optional

CONFIG_DIR = os.path.join(os.path.dirname(__file__), "..", "data", "guilds")

DEFAULT_CONFIG = {
    "roles": {
        "banquier": None,
        "gouvernement": None,
        "citoyen": None,
        "staff": None,
        "team_staff": None,
        "attente_oral": None,
        "candidature_a_faire": None,
        "ems": None,
        "visite_medicale": None,
        "permis": None,
        "auto_ecole": None,
        "session_reminders": None,
    },
    "channels": {
        "welcome": None,
        "candidature": None,
        "candidature_2": None,
        "questions": None,
        "mp_reception": None,
    },
    "categories": {
        "ticket": None,
    },
}

ROLE_LABELS = {
    "banquier": "Banquier",
    "gouvernement": "Gouvernement",
    "citoyen": "Citoyen",
    "staff": "Staff",
    "team_staff": "Team Staff",
    "attente_oral": "Attente Oral",
    "candidature_a_faire": "Candidature A Faire",
    "ems": "EMS",
    "visite_medicale": "Visite Médicale",
    "permis": "Permis",
    "auto_ecole": "Auto-École",
    "session_reminders": "Session Reminders",
}

CHANNEL_LABELS = {
    "welcome": "Bienvenue",
    "candidature": "Candidature",
    "candidature_2": "Candidature 2",
    "questions": "Questions",
    "mp_reception": "Réception MP",
}

CATEGORY_LABELS = {
    "ticket": "Tickets",
}


def _config_path(guild_id: int) -> str:
    return os.path.join(CONFIG_DIR, f"{guild_id}.json")


def load_guild_config(guild_id: int) -> dict:
    path = _config_path(guild_id)
    if not os.path.exists(path):
        return {"roles": {}, "channels": {}, "categories": {}}
    try:
        with open(path, "r", encoding="utf-8") as f:
            return json.load(f)
    except (json.JSONDecodeError, IOError):
        return {"roles": {}, "channels": {}, "categories": {}}


def save_guild_config(guild_id: int, config: dict):
    os.makedirs(CONFIG_DIR, exist_ok=True)
    path = _config_path(guild_id)
    with open(path, "w", encoding="utf-8") as f:
        json.dump(config, f, ensure_ascii=False, indent=4)


def get_role_id(guild_id: int, key: str) -> Optional[int]:
    config = load_guild_config(guild_id)
    val = config.get("roles", {}).get(key)
    return int(val) if val else None


def get_channel_id(guild_id: int, key: str) -> Optional[int]:
    config = load_guild_config(guild_id)
    val = config.get("channels", {}).get(key)
    return int(val) if val else None


def get_category_id(guild_id: int, key: str) -> Optional[int]:
    config = load_guild_config(guild_id)
    val = config.get("categories", {}).get(key)
    return int(val) if val else None


def get_guild_role(guild: discord.Guild, key: str) -> Optional[discord.Role]:
    role_id = get_role_id(guild.id, key)
    if not role_id:
        return None
    return guild.get_role(role_id)


def get_guild_channel(guild: discord.Guild, key: str) -> Optional[discord.abc.Messageable]:
    channel_id = get_channel_id(guild.id, key)
    if not channel_id:
        return None
    return guild.get_channel(channel_id)


def get_guild_category(guild: discord.Guild, key: str) -> Optional[discord.CategoryChannel]:
    cat_id = get_category_id(guild.id, key)
    if not cat_id:
        return None
    return guild.get_channel(cat_id)


def has_role(member: discord.Member, key: str) -> bool:
    role = get_guild_role(member.guild, key)
    if not role:
        return False
    return role in member.roles


def set_config_value(guild_id: int, section: str, key: str, value):
    config = load_guild_config(guild_id)
    if section not in config:
        config[section] = {}
    config[section][key] = value
    save_guild_config(guild_id, config)


def is_configured(guild_id: int) -> dict:
    config = load_guild_config(guild_id)
    missing = {"roles": [], "channels": [], "categories": []}
    for key in DEFAULT_CONFIG["roles"]:
        if not config.get("roles", {}).get(key):
            missing["roles"].append(key)
    for key in DEFAULT_CONFIG["channels"]:
        if not config.get("channels", {}).get(key):
            missing["channels"].append(key)
    for key in DEFAULT_CONFIG["categories"]:
        if not config.get("categories", {}).get(key):
            missing["categories"].append(key)
    return missing