"""
GUI smoke tests — headless PySide6 (QT_QPA_PLATFORM=offscreen).
Verifies that all modules import and core widgets instantiate without crashing.
No network calls, no DB, no real data.

Run automatically via PostToolUse hook on every edit to screener_gui.py.
"""

import os
import sys
import subprocess
from pathlib import Path

PROJECT_ROOT = Path(__file__).parent.parent
DIST_DIR = PROJECT_ROOT / "dist"
PYTHON = sys.executable


def _run(code: str) -> subprocess.CompletedProcess:
    """Run Python code in a subprocess with offscreen Qt platform."""
    env = os.environ.copy()
    env["QT_QPA_PLATFORM"] = "offscreen"
    return subprocess.run(
        [PYTHON, "-c", code],
        capture_output=True,
        text=True,
        cwd=str(DIST_DIR),
        env=env,
        timeout=30,
    )


def test_stock_screener_imports():
    """stock_screener.py imports and exposes expected symbols."""
    result = _run("""
import stock_screener as ss
required = [
    'compute_value_score', 'compute_quality_score',
    'compute_growth_score', 'compute_profitability_score',
    'compute_sentiment_score', 'score_stocks',
    'STRATEGY_PRESETS', 'WEIGHTS',
]
missing = [s for s in required if not hasattr(ss, s)]
assert not missing, f"Missing symbols: {missing}"
print("SCREENER_OK")
""")
    assert "SCREENER_OK" in result.stdout, f"stock_screener import failed:\n{result.stderr}"


def test_screener_gui_imports():
    """screener_gui.py imports without error (PySide6, matplotlib, etc.)."""
    result = _run("""
from PySide6.QtWidgets import QApplication
import sys
app = QApplication(sys.argv)
import screener_gui
print("GUI_IMPORT_OK")
""")
    assert "GUI_IMPORT_OK" in result.stdout, (
        f"screener_gui import failed:\n{result.stderr[-2000:]}"
    )


def test_stock_table_model():
    """StockTableModel can be created and populated via set_data."""
    result = _run("""
import sys
from PySide6.QtWidgets import QApplication
app = QApplication(sys.argv)
from screener_gui import StockTableModel
model = StockTableModel()
assert model.rowCount() == 0
model.set_data([("AAPL", "Apple Inc", 82.5, "Technology")])
assert model.rowCount() == 1
assert model.columnCount() == 5
print("TABLE_MODEL_OK")
""")
    assert "TABLE_MODEL_OK" in result.stdout, (
        f"StockTableModel test failed:\n{result.stderr[-2000:]}"
    )


def test_screener_app_instantiates():
    """ScreenerApp (main window) instantiates without crashing."""
    result = _run("""
import sys
from PySide6.QtWidgets import QApplication
app = QApplication(sys.argv)
from screener_gui import ScreenerApp
win = ScreenerApp()
# Verify expected attributes exist
assert hasattr(win, '_screener_page')
assert hasattr(win, '_search_page')
assert hasattr(win, '_sidebar')
print("APP_OK")
""")
    assert "APP_OK" in result.stdout, (
        f"ScreenerApp instantiation failed:\n{result.stderr[-2000:]}"
    )