"""
ANSI terminal display backend.
"""

import time


class TerminalDisplay:
    """ANSI terminal display backend."""

    width: int = 80
    height: int = 24

    def init(self, width: int, height: int) -> None:
        from engine.terminal import CURSOR_OFF

        self.width = width
        self.height = height
        print(CURSOR_OFF, end="", flush=True)

    def show(self, buffer: list[str]) -> None:
        import sys

        t0 = time.perf_counter()
        sys.stdout.buffer.write("".join(buffer).encode())
        sys.stdout.flush()
        elapsed_ms = (time.perf_counter() - t0) * 1000

        from engine.display import get_monitor

        monitor = get_monitor()
        if monitor:
            chars_in = sum(len(line) for line in buffer)
            monitor.record_effect("terminal_display", elapsed_ms, chars_in, chars_in)

    def clear(self) -> None:
        from engine.terminal import CLR

        print(CLR, end="", flush=True)

    def cleanup(self) -> None:
        from engine.terminal import CURSOR_ON

        print(CURSOR_ON, end="", flush=True)