"""Telegram command handlers for JIGAIDO."""

import json
import re
import time
from functools import wraps

import dateparser
from telegram import Update
from telegram.ext import ContextTypes

import storage

TELEGRAM_BOT_USERNAME = "your_bot_username"

REMINDER_WINDOW_DAYS = 7


def extract_args(text: str) -> list[str]:
    if not text:
        return []
    tokens = text.strip().split()
    return tokens[1:] if len(tokens) > 1 else []


def parse_args(args: list[str]) -> tuple[str | None, str | None, int | None]:
    text = None
    link = None
    due_date_ts = None

    remaining = []
    for arg in args:
        if not link and (arg.startswith("http://") or arg.startswith("https://")):
            link = arg
        elif due_date_ts is None:
            parsed = dateparser.parse(arg)
            if parsed:
                due_date_ts = int(parsed.timestamp())
            else:
                remaining.append(arg)
        else:
            remaining.append(arg)

    text = " ".join(remaining) if remaining else None
    return text, link, due_date_ts


def format_bounty(b: dict, show_id: bool = True) -> str:
    parts = []
    if show_id:
        parts.append(f"[#{b['id']}]")
    if b["text"]:
        parts.append(b["text"])
    if b.get("link"):
        parts.append(f"🔗 {b['link']}")
    if b.get("due_date_ts"):
        due_str = time.strftime("%Y-%m-%d", time.localtime(b["due_date_ts"]))
        days_left = (b["due_date_ts"] - int(time.time())) // 86400
        if days_left < 0:
            parts.append(f"⏰ {due_str} (OVERDUE)")
        elif days_left == 0:
            parts.append(f"⏰ {due_str} (TODAY)")
        else:
            parts.append(f"⏰ {due_str} ({days_left}d)")
    parts.append(f"by @{b.get('informed_by_username', 'unknown')}")
    return " | ".join(parts)


def is_group(update: Update) -> bool:
    return update.effective_chat.type != "private"


def ensure_user(update: Update) -> dict:
    user = update.effective_user
    user_data = storage.load_user(user.id)
    user_data["username"] = user.username
    storage.save_user(user_data)
    return user_data


def get_user_by_username(username: str) -> dict | None:
    for path in storage.USERS_DIR.glob("*.json"):
        with open(path) as f:
            data = json.load(f)
            if data.get("username") == username:
                return data
    return None


def is_group_admin_or_creator(update: Update, group_id: int, user_data: dict) -> bool:
    return True


def is_group_creator(update: Update, group_id: int, user_data: dict) -> bool:
    return True


def get_all_group_bounties(group_id: int) -> list[dict]:
    all_bounties = []
    for path in storage.USERS_DIR.glob("*.json"):
        with open(path) as f:
            user_data = json.load(f)
        for bounty in user_data.get("personal_bounties", []):
            if bounty.get("group_id") == group_id:
                bounty["creator_username"] = user_data.get("username")
                all_bounties.append(bounty)
    return sorted(all_bounties, key=lambda b: b.get("created_at", 0), reverse=True)


def admin_only(func):
    @wraps(func)
    async def wrapper(update: Update, ctx: ContextTypes.DEFAULT_TYPE):
        if is_group(update):
            await update.message.reply_text("⛔ Admin only.")
            return
        return await func(update, ctx)

    return wrapper


def creator_only(func):
    @wraps(func)
    async def wrapper(update: Update, ctx: ContextTypes.DEFAULT_TYPE):
        if is_group(update):
            await update.message.reply_text("⛔ Group creator only.")
            return
        return await func(update, ctx)

    return wrapper


async def cmd_bounty(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    if is_group(update):
        bounties = get_all_group_bounties(update.effective_chat.id)
    else:
        user_data = ensure_user(update)
        bounties = user_data.get("personal_bounties", [])

    if not bounties:
        await update.message.reply_text("No bounties yet.")
        return

    lines = [format_bounty(dict(b), show_id=True) for b in bounties]
    await update.message.reply_text("\n".join(lines), disable_web_page_preview=True)


async def cmd_my(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    user_data = ensure_user(update)
    tracked = user_data.get("tracked_bounties", [])

    if not tracked:
        await update.message.reply_text("You are not tracking any bounties.")
        return

    bounty_lines = []
    for tracked_bounty in tracked:
        bounty_id = tracked_bounty.get("bounty_id")
        group_id = tracked_bounty.get("group_id")
        for path in storage.USERS_DIR.glob("*.json"):
            with open(path) as f:
                creator_data = json.load(f)
            for bounty in creator_data.get("personal_bounties", []):
                if bounty.get("id") == bounty_id and bounty.get("group_id") == group_id:
                    bounty["creator_username"] = creator_data.get("username")
                    bounty_lines.append(format_bounty(bounty, show_id=True))
                    break

    if not bounty_lines:
        await update.message.reply_text("You are not tracking any bounties.")
        return

    await update.message.reply_text(
        "\n".join(bounty_lines), disable_web_page_preview=True
    )


async def cmd_add(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    args = extract_args(update.message.text)
    if not args:
        await update.message.reply_text(
            "Usage: /add <text> [link] [due_date]\n"
            "Example: /add Fix the bug https://github.com/foo/bar tomorrow"
        )
        return

    text, link, due_date_ts = parse_args(args)
    if not text and not link:
        await update.message.reply_text("A bounty needs at least text or a link.")
        return

    user_data = ensure_user(update)
    group_id = None if is_group(update) else None

    if is_group(update):
        group_id = update.effective_chat.id

    informed_by = update.effective_user.username or str(update.effective_user.id)
    created_at = int(time.time())

    bounty = {
        "id": storage.next_bounty_id(user_data),
        "text": text,
        "link": link,
        "due_date_ts": due_date_ts,
        "group_id": group_id,
        "informed_by_username": informed_by,
        "created_at": created_at,
    }

    user_data.setdefault("personal_bounties", []).append(bounty)
    storage.save_user(user_data)

    due_str = ""
    if due_date_ts:
        due_str = f" | Due: {time.strftime('%Y-%m-%d', time.localtime(due_date_ts))}"

    await update.message.reply_text(
        f"✅ Bounty added (#{bounty['id']}){due_str}",
        disable_web_page_preview=True,
    )


async def cmd_update(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    args = extract_args(update.message.text)
    if len(args) < 1:
        await update.message.reply_text(
            "Usage: /update <bounty_id> [text] [link] [due_date]"
        )
        return

    try:
        bounty_id = int(args[0])
    except ValueError:
        await update.message.reply_text("Invalid bounty ID.")
        return

    text, link, due_date_ts = parse_args(args[1:])
    if not text and not link and due_date_ts is None:
        await update.message.reply_text("Nothing to update.")
        return

    user_data = ensure_user(update)
    group_id = None if is_group(update) else None

    if is_group(update):
        group_id = update.effective_chat.id

    for bounty in user_data.get("personal_bounties", []):
        if bounty.get("id") == bounty_id and bounty.get("group_id") == group_id:
            if text:
                bounty["text"] = text
            if link:
                bounty["link"] = link
            if due_date_ts is not None:
                bounty["due_date_ts"] = due_date_ts
            storage.save_user(user_data)
            await update.message.reply_text(f"✅ Bounty #{bounty_id} updated.")
            return

    await update.message.reply_text("Bounty not found.")


async def cmd_delete(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    args = extract_args(update.message.text)
    if not args:
        await update.message.reply_text("Usage: /delete <bounty_id>")
        return

    try:
        bounty_id = int(args[0])
    except ValueError:
        await update.message.reply_text("Invalid bounty ID.")
        return

    user_data = ensure_user(update)
    group_id = None if is_group(update) else None

    if is_group(update):
        group_id = update.effective_chat.id

    for i, bounty in enumerate(user_data.get("personal_bounties", [])):
        if bounty.get("id") == bounty_id and bounty.get("group_id") == group_id:
            user_data["personal_bounties"].pop(i)
            storage.save_user(user_data)
            await update.message.reply_text(f"✅ Bounty #{bounty_id} deleted.")
            return

    await update.message.reply_text("Bounty not found.")


async def cmd_track(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    args = extract_args(update.message.text)
    if not args:
        await update.message.reply_text("Usage: /track <bounty_id>")
        return

    try:
        bounty_id = int(args[0])
    except ValueError:
        await update.message.reply_text("Invalid bounty ID.")
        return

    group_id = None
    if is_group(update):
        group_id = update.effective_chat.id

    user_data = ensure_user(update)

    for tracked in user_data.get("tracked_bounties", []):
        if (
            tracked.get("bounty_id") == bounty_id
            and tracked.get("group_id") == group_id
        ):
            await update.message.reply_text(f"Already tracking bounty #{bounty_id}.")
            return

    user_data.setdefault("tracked_bounties", []).append(
        {
            "bounty_id": bounty_id,
            "group_id": group_id,
            "created_at": int(time.time()),
        }
    )
    storage.save_user(user_data)
    await update.message.reply_text(f"✅ Now tracking bounty #{bounty_id}.")


async def cmd_untrack(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    args = extract_args(update.message.text)
    if not args:
        await update.message.reply_text("Usage: /untrack <bounty_id>")
        return

    try:
        bounty_id = int(args[0])
    except ValueError:
        await update.message.reply_text("Invalid bounty ID.")
        return

    user_data = ensure_user(update)
    group_id = None if is_group(update) else None

    tracked = user_data.get("tracked_bounties", [])
    for i, t in enumerate(tracked):
        if t.get("bounty_id") == bounty_id and t.get("group_id") == group_id:
            tracked.pop(i)
            storage.save_user(user_data)
            await update.message.reply_text(f"✅ Untracked bounty #{bounty_id}.")
            return

    await update.message.reply_text(f"Not tracking bounty #{bounty_id}.")


async def cmd_admin_add(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    await update.message.reply_text(
        "Admin management has been removed in this version."
    )


async def cmd_admin_remove(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    await update.message.reply_text(
        "Admin management has been removed in this version."
    )


async def cmd_start(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    ensure_user(update)
    if is_group(update):
        await update.message.reply_text(
            "👻 JIGAIDO is watching.\n\n"
            "This group's bounty list is now active.\n"
            "/bounty — list bounties\n"
            "/add — create a bounty\n"
            "/track — track a bounty\n"
            "/my — your tracked bounties"
        )
    else:
        await update.message.reply_text(
            "👻 JIGAIDO activated.\n\n"
            "Personal bounty list ready.\n"
            "/bounty — list your bounties\n"
            "/add — create a bounty\n"
            "/my — your tracked bounties"
        )


async def cmd_help(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
    await update.message.reply_text(
        "👻 JIGAIDO Commands:\n\n"
        "/bounty — list all bounties\n"
        "/my — bounties you're tracking\n"
        "/add <text> [link] [due] — add bounty\n"
        "/update <id> [text] [link] [due] — update bounty\n"
        "/delete <id> — delete bounty\n"
        "/track <id> — track a bounty\n"
        "/untrack <id> — stop tracking\n"
        "/start — re-initialize\n"
        "/help — this message",
        disable_web_page_preview=True,
    )