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#!/usr/bin/env python3
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"""A simple example cmd2 application demonstrating many common features.
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Features demonstrated include all of the following:
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 1) Colorizing/stylizing output
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 2) Using multiline commands
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 3) Persistent history
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 4) How to run an initialization script at startup
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 5) How to group and categorize commands when displaying them in help
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 6) Opting-in to using the ipy command to run an IPython shell
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 7) Allowing access to your application in py and ipy
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 8) Displaying an intro banner upon starting your application
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 9) Using a custom prompt
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10) How to make custom attributes settable at runtime.
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11) Shortcuts for commands
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12) Persistent bottom toolbar with realtime status updates
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"""
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import pathlib
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import threading
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import time
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from prompt_toolkit.formatted_text import FormattedText
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from rich.style import Style
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import cmd2
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from cmd2 import (
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    Color,
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    stylize,
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)
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class BasicApp(cmd2.Cmd):
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    """Cmd2 application to demonstrate many common features."""
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    DEFAULT_CATEGORY = "My Custom Commands"
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    def __init__(self) -> None:
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        """Initialize the cmd2 application."""
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        # Startup script that defines a couple aliases for running shell commands
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        alias_script = pathlib.Path(__file__).absolute().parent / ".cmd2rc"
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        # Create a shortcut for one of our commands
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        shortcuts = cmd2.DEFAULT_SHORTCUTS
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        shortcuts.update({"&": "intro"})
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        super().__init__(
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            auto_suggest=True,
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            bottom_toolbar=True,
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            include_ipy=True,
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            multiline_commands=["echo"],
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            persistent_history_file="cmd2_history.dat",
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            shortcuts=shortcuts,
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            startup_script=str(alias_script),
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        )
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        # Spawn a background thread to refresh the bottom toolbar twice a second.
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        # This is necessary because the toolbar contains a timestamp that we want to keep current.
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        self._stop_refresh = False
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        self._refresh_thread = threading.Thread(target=self._refresh_bottom_toolbar, daemon=True)
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        self._refresh_thread.start()
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        # Prints an intro banner once upon application startup
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        self.intro = (
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            stylize(
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                "Welcome to cmd2!",
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                style=Style(color=Color.GREEN1, bgcolor=Color.GRAY0, bold=True),
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            )
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            + " Note the full Unicode support:  😇 💩"
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            + " and the persistent bottom bar with realtime status updates!"
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        )
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        # Show this as the prompt when asking for input
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        self.prompt = "myapp> "
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        # Used as prompt for multiline commands after the first line
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        self.continuation_prompt = "... "
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        # Allow access to your application in py and ipy via self
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        self.self_in_py = True
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        # Color to output text in with echo command
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        self.foreground_color = Color.CYAN.value
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        # Make echo_fg settable at runtime
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        fg_colors = [c.value for c in Color]
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        self.add_settable(
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            cmd2.Settable(
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                "foreground_color",
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                str,
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                "Foreground color to use with echo command",
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                self,
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                choices=fg_colors,
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            )
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        )
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    def get_rprompt(self) -> str | FormattedText | None:
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        current_working_directory = pathlib.Path.cwd()
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        style = "bg:ansired fg:ansiwhite"
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        text = f"cwd={current_working_directory}"
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        return FormattedText([(style, text)])
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    def _refresh_bottom_toolbar(self) -> None:
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        """Background thread target to refresh the bottom toolbar.
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        This is a toy example to show how the bottom toolbar can be used to display
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        realtime status updates in an otherwise line-oriented command interpreter.
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        """
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        import contextlib
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        from prompt_toolkit.application.current import get_app
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        while not self._stop_refresh:
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            with contextlib.suppress(Exception):
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                # get_app() will return the currently running prompt-toolkit application
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                app = get_app()
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                if app:
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                    app.invalidate()
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            time.sleep(0.5)
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    def do_intro(self, _: cmd2.Statement) -> None:
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        """Display the intro banner."""
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        self.poutput(self.intro)
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    def do_echo(self, arg: cmd2.Statement) -> None:
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        """Multiline command."""
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        self.poutput(
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            stylize(
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                arg,
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                style=Style(color=self.foreground_color),
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            )
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        )
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if __name__ == "__main__":
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    import sys
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    app = BasicApp()
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    sys.exit(app.cmdloop())

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import cmd2
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class Cmd2EventBased(cmd2.Cmd):
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    def __init__(self):
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        cmd2.Cmd.__init__(self)
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    # ... 你的类代码 ...
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if __name__ == '__main__':
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    app = Cmd2EventBased()
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    app.preloop()
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    # 在你希望运行单个命令的任何事件循环机制中执行此操作
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    cmd_line_text = "help history"
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    app.runcmds_plus_hooks([cmd_line_text])
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    app.postloop()