#!/usr/bin/env python3
"""Exercise the real GUI's default ~/.xtc.conf lifecycle in an isolated child HOME."""
import configparser
import os
from pathlib import Path
import subprocess
import sys
import tempfile
import time

binary = str(Path(sys.argv[1]).resolve())
with tempfile.TemporaryDirectory(prefix="xtc-config-startup-") as directory:
    configuration = Path(directory) / ".xtc.conf"
    environment = dict(os.environ)
    environment["HOME"] = directory  # Child only; never reads/writes the user's config.

    def run_window(expected_width):
        process = subprocess.Popen([binary], env=environment, stdout=subprocess.PIPE,
                                   stderr=subprocess.PIPE, text=True)
        try:
            window = None
            deadline = time.monotonic() + 15
            while time.monotonic() < deadline:
                if process.poll() is not None:
                    raise AssertionError(f"GUI exited early: {process.communicate()}")
                found = subprocess.run(["xdotool", "search", "--onlyvisible", "--pid",
                                        str(process.pid), "--name", "xtc"],
                                       capture_output=True, text=True)
                if found.returncode == 0:
                    window = found.stdout.splitlines()[0]
                    geometry = subprocess.check_output(
                        ["xdotool", "getwindowgeometry", "--shell", window], text=True)
                    if f"WIDTH={expected_width}\n" in geometry:
                        break
                time.sleep(.05)
            else:
                raise AssertionError(f"Expected startup width {expected_width}; window={window}")
            subprocess.run(["xdotool", "windowfocus", window], check=True)
            subprocess.run(["xdotool", "key", "--window", window, "ctrl+q"], check=True)
            output, error = process.communicate(timeout=15)
            assert process.returncode == 0, (output, error)
        finally:
            if process.poll() is None:
                process.kill()
                process.communicate()

    run_window(1280)
    assert configuration.exists() and configuration.stat().st_mode & 0o777 == 0o600
    saved = configparser.ConfigParser()
    saved.read(configuration)
    assert saved["midi"]["midi_input_channel"] == "-1"
    assert saved["editing"]["note_velocity"] == "100"
    configuration.write_text("[interface]\nwidth=1360\nheight=860\n"
                             "[midi]\nmidi_input_channel=5\nmidi_output_channel=7\n"
                             "[project_defaults]\ntempo=137000\n")
    run_window(1360)
    saved.read(configuration)
    assert saved["midi"]["midi_input_channel"] == "5"
    assert saved["midi"]["midi_output_channel"] == "7"
    assert saved["project_defaults"]["tempo"] == "137000"
    invalid = "[unknown]\nkeep_this_file=1\n"
    configuration.write_text(invalid)
    run_window(1280)
    assert configuration.read_text() == invalid
print("Real startup ~/.xtc.conf creation, defaults, reload and malformed-file preservation passed.")