from __future__ import annotations

from unittest.mock import patch

from ameba_control_panel.config import Direction
from ameba_control_panel.services.log_buffer import LogBuffer, LogLine


class TestLogBuffer:
    def test_append_returns_logline(self):
        buf = LogBuffer(max_tail=10)
        line = buf.append("hello", Direction.RX)
        assert isinstance(line, LogLine)
        assert line.text == "hello"
        assert line.direction == Direction.RX

    def test_tail_bounded(self):
        buf = LogBuffer(max_tail=5)
        for i in range(10):
            buf.append(f"line {i}", Direction.RX)
        assert len(buf.tail()) == 5
        assert buf.tail()[0].text == "line 5"

    def test_archive_bounded(self):
        with patch("ameba_control_panel.services.log_buffer.config.LOG_ARCHIVE_MAX", 3):
            buf = LogBuffer(max_tail=10)
            for i in range(5):
                buf.append(f"line {i}", Direction.RX)
            assert len(buf.archive()) == 3
            assert buf.archive()[0].text == "line 2"

    def test_clear(self):
        buf = LogBuffer(max_tail=10)
        buf.append("test", Direction.INFO)
        buf.clear()
        assert len(buf.tail()) == 0
        assert len(buf.archive()) == 0

    def test_as_text(self):
        buf = LogBuffer(max_tail=10)
        buf.append("hello", Direction.RX)
        buf.append("world", Direction.TX)
        text = buf.as_text()
        assert "hello" in text
        assert "world" in text

    def test_direction_preserved(self):
        buf = LogBuffer(max_tail=10)
        buf.append("rx data", Direction.RX)
        buf.append("tx data", Direction.TX)
        buf.append("info msg", Direction.INFO)
        lines = list(buf.tail())
        assert lines[0].direction == Direction.RX
        assert lines[1].direction == Direction.TX
        assert lines[2].direction == Direction.INFO

    def test_newline_stripped(self):
        buf = LogBuffer(max_tail=10)
        line = buf.append("with newline\n", Direction.RX)
        assert line.text == "with newline"