import contextlib
import io
import tempfile
import unittest
from pathlib import Path

from ampg.cli import main
from ampg.config import load_config
from ampg.selection import parse_protocol_filters, select_protocols


def _write_config(root: Path) -> Path:
    source = root / "site"
    source.mkdir()
    (source / "index.html").write_text(
        '<html><body onload="boot()"><script src="app.js"></script><h1>Hello</h1></body></html>',
        encoding="utf-8",
    )
    (source / "app.js").write_text("boot()", encoding="utf-8")
    config_path = root / "gateway.toml"
    config_path.write_text(
        """
[[site]]
id = "example"
domain = "example.test"

[site.source]
kind = "static-html"
path = "./site"

[site.outputs]
root = "./out"
plan_root = "./plan"

[site.protocols.clearnet]
enabled = true
renderer = "clearnet"
daemon = "nginx"
daemon_policy = "adopt"

[site.protocols.tor]
enabled = true
renderer = "privacy-html"
daemon = "tor"
daemon_policy = "auto"

[site.protocols.i2p]
enabled = true
renderer = "privacy-html"
daemon = "i2pd"
daemon_policy = "auto"
""",
        encoding="utf-8",
    )
    return config_path


class ProtocolSelectionTest(unittest.TestCase):
    def test_parse_protocol_filters_supports_repeated_and_comma_values(self):
        self.assertEqual(
            ("tor", "i2p", "gemini"),
            parse_protocol_filters(["tor,i2p", "gemini", "tor"]),
        )

    def test_select_protocols_filters_sites(self):
        with tempfile.TemporaryDirectory() as tmp:
            config = load_config(_write_config(Path(tmp)))
            selected = select_protocols(config, ("i2p",))

        self.assertEqual(["i2p"], list(selected.sites[0].protocols))

    def test_select_protocols_rejects_unknown_protocol(self):
        with tempfile.TemporaryDirectory() as tmp:
            config = load_config(_write_config(Path(tmp)))

            with self.assertRaisesRegex(ValueError, "not declared"):
                select_protocols(config, ("gemini",))

    def test_build_protocol_filter_only_writes_selected_output(self):
        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            config_path = _write_config(root)

            stdout = io.StringIO()
            with contextlib.redirect_stdout(stdout):
                status = main(["--config", str(config_path), "build", "--protocol", "i2p"])

            self.assertEqual(0, status)
            self.assertTrue((root / "out/i2p/index.html").exists())
            self.assertFalse((root / "out/clearnet").exists())
            self.assertFalse((root / "out/tor").exists())
            self.assertIn("protocol=i2p", stdout.getvalue())
            self.assertNotIn("protocol=clearnet", stdout.getvalue())

    def test_apply_protocol_filter_avoids_unselected_clearnet_block(self):
        with tempfile.TemporaryDirectory() as tmp:
            root = Path(tmp)
            config_path = _write_config(root)
            output = root / "out/i2p"
            output.mkdir(parents=True)
            (output / ".ampg-output").write_text("generated by AMPG\n", encoding="utf-8")

            stdout = io.StringIO()
            with contextlib.redirect_stdout(stdout):
                status = main(
                    [
                        "--config",
                        str(config_path),
                        "apply",
                        "--dry-run",
                        "--protocol",
                        "i2p",
                        "--platform",
                        "android-termux",
                    ]
                )

            output_text = stdout.getvalue()

        self.assertEqual(0, status)
        self.assertIn("protocol=i2p", output_text)
        self.assertIn("blocked=0", output_text)
        self.assertNotIn("protocol=clearnet", output_text)

    def test_cli_rejects_unknown_protocol_filter(self):
        with tempfile.TemporaryDirectory() as tmp:
            config_path = _write_config(Path(tmp))

            stderr = io.StringIO()
            with contextlib.redirect_stderr(stderr):
                status = main(["--config", str(config_path), "status", "--protocol", "gemini"])

        self.assertEqual(1, status)
        self.assertIn("selected protocol(s) not declared", stderr.getvalue())


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