from __future__ import annotations

from typing import Any, Literal

from telegram import Bot, InlineKeyboardButton, InlineKeyboardMarkup

ButtonStyle = Literal["default", "primary", "danger"]
ButtonScope = Literal["off", "dm", "group", "all", "allowlist"]


def _style_to_flag_url(style: ButtonStyle) -> str | None:
    if style == "primary":
        return "tg://btn_primary"
    if style == "danger":
        return "tg://btn_danger"
    return None


def build_inline_keyboard(
    buttons: list[dict[str, Any]] | None,
    scope: ButtonScope = "all",
    chat_type: str = "direct",
    allowlist_chats: set[str] | None = None,
    chat_id: str = "",
) -> InlineKeyboardMarkup | None:
    if not buttons:
        return None

    match scope:
        case "off":
            return None
        case "dm":
            if chat_type != "direct":
                return None
        case "group":
            if chat_type == "direct":
                return None
        case "allowlist":
            allowlist_chats = allowlist_chats or set()
            if chat_id not in allowlist_chats:
                return None

    rows = []
    for row in buttons:
        if isinstance(row, list):
            row_buttons = []
            for btn in row:
                if isinstance(btn, dict):
                    ib = InlineKeyboardButton(
                        text=btn.get("text", ""),
                        callback_data=btn.get("callback_data", ""),
                        url=btn.get("url"),
                    )
                    row_buttons.append(ib)
            if row_buttons:
                rows.append(row_buttons)
        elif isinstance(row, dict):
            btn = row
            ib = InlineKeyboardButton(
                text=btn.get("text", ""),
                callback_data=btn.get("callback_data", ""),
                url=btn.get("url"),
            )
            rows.append([ib])

    return InlineKeyboardMarkup(rows) if rows else None


async def send_inline_buttons(
    bot: Bot,
    chat_id: str,
    text: str,
    buttons: list[dict[str, Any]] | None = None,
    scope: ButtonScope = "all",
    chat_type: str = "direct",
    allowlist_chats: set[str] | None = None,
    **kwargs,
) -> Any:
    payload = {"chat_id": chat_id, "text": text}
    payload.update(kwargs)

    markup = build_inline_keyboard(
        buttons,
        scope=scope,
        chat_type=chat_type,
        allowlist_chats=allowlist_chats,
        chat_id=chat_id,
    )
    if markup:
        payload["reply_markup"] = markup

    return await bot.send_message(**payload)


def build_model_selector_buttons(models: list[str], current_model: str = "") -> list[dict[str, Any]]:
    buttons = []
    for model in models:
        prefix = "\u2705 " if model == current_model else ""
        buttons.append(
            {
                "text": f"{prefix}{model}",
                "callback_data": f"model:{model}",
            }
        )
    return buttons


def build_exec_approval_buttons(approval_id: str) -> list[dict[str, Any]]:
    return [
        [
            {"text": "\u2705 \u6279\u51c6", "callback_data": f"exec:approve:{approval_id}"},
            {"text": "\u274c \u62d2\u7edd", "callback_data": f"exec:reject:{approval_id}"},
        ]
    ]


def build_provider_browse_keyboard(
    providers: list[str],
    current_provider: str = "",
    prefix: str = "provider",
) -> list[list[dict[str, Any]]]:
    rows = []
    for provider in providers:
        label = f"\u2705 {provider}" if provider == current_provider else provider
        rows.append([{"text": label, "callback_data": f"{prefix}:{provider}"}])
    return rows


def build_paginated_command_keyboard(
    commands: list[dict[str, Any]],
    page: int = 0,
    page_size: int = 8,
    prefix: str = "cmd",
) -> list[list[dict[str, Any]]]:
    total_pages = (len(commands) + page_size - 1) // page_size if page_size > 0 else 1
    start = page * page_size
    end = min(start + page_size, len(commands))
    page_commands = commands[start:end]

    rows = []
    row_count = max(2, min(4, len(page_commands)))
    cmds_per_row = (len(page_commands) + row_count - 1) // row_count
    for i in range(row_count):
        row = []
        for j in range(cmds_per_row):
            idx = i * cmds_per_row + j
            if idx < len(page_commands):
                cmd = page_commands[idx]
                row.append(
                    {
                        "text": cmd.get("label", cmd.get("command", "")),
                        "callback_data": f"{prefix}:{cmd.get('command', '')}",
                    }
                )
        if row:
            rows.append(row)

    if total_pages > 1:
        nav = []
        if page > 0:
            nav.append({"text": "\u25c0 \u4e0a\u4e00\u9875", "callback_data": f"{prefix}:page:{page - 1}"})
        nav.append({"text": f"{page + 1}/{total_pages}", "callback_data": f"{prefix}:page:info"})
        if page < total_pages - 1:
            nav.append({"text": "\u4e0b\u4e00\u9875 \u25b6", "callback_data": f"{prefix}:page:{page + 1}"})
        rows.append(nav)

    return rows