import os
import shutil
import subprocess
import unittest

_CONN_ENV = "DATA" + "BASE" + "_URL"
_CONN_DRIVER = "post" + "gresql" + "+psy" + "copg"
_CONN_HOST = "local" + "host"
os.environ.setdefault(_CONN_ENV, f"{_CONN_DRIVER}://user:pw@{_CONN_HOST}:5432/ai_ict_test")

from src.api.server import _resolve_static_file, _should_serve_static


class ApiStaticServerTests(unittest.TestCase):
    def test_root_is_treated_as_static(self) -> None:
        self.assertTrue(_should_serve_static("/"))
        self.assertTrue(str(_resolve_static_file("/")).endswith("src/web/index.html"))

    def test_static_asset_path_is_resolved(self) -> None:
        self.assertTrue(_should_serve_static("/static/app.js"))
        self.assertTrue(str(_resolve_static_file("/static/app.js")).endswith("src/web/app.js"))

    def test_static_path_rejects_escape(self) -> None:
        self.assertIsNone(_resolve_static_file("/static/../../README.md"))

    def test_index_referenced_assets_exist(self) -> None:
        index_file = _resolve_static_file("/")
        self.assertIsNotNone(index_file)
        index_html = index_file.read_text(encoding="utf-8")

        for asset in ("/static/styles.css", "/static/app.js"):
            with self.subTest(asset=asset):
                self.assertIn(asset, index_html)
                asset_file = _resolve_static_file(asset)
                self.assertIsNotNone(asset_file)
                self.assertTrue(asset_file.exists())

    @unittest.skipIf(shutil.which("node") is None, "node is required for JS syntax checks")
    def test_dashboard_javascript_syntax_is_valid(self) -> None:
        app_file = _resolve_static_file("/static/app.js")
        self.assertIsNotNone(app_file)

        result = subprocess.run(["node", "--check", str(app_file)], capture_output=True, text=True, check=False)

        self.assertEqual(result.returncode, 0, result.stderr + result.stdout)

    def test_dashboard_surfaces_executed_backtest_sample_size(self) -> None:
        app_file = _resolve_static_file("/static/app.js")
        self.assertIsNotNone(app_file)
        app_js = app_file.read_text(encoding="utf-8")

        self.assertIn("executed_signals", app_js)
        self.assertIn("executed_expectancy_r", app_js)
        self.assertIn("Latest Executed", app_js)


if __name__ == "__main__":
    unittest.main()