from __future__ import annotations

import io
import json
import subprocess
import tempfile
import unittest
import unittest.mock
from pathlib import Path
from typing import Any

from cli.administration.deploy.dedicated import runner
from cli.administration.inventory.provision.services.disabler import (
    ServicesDisabledConflictError,
)

_ANSIBLE_PLAYBOOK = "/venv/bin/ansible-playbook"


class TestRunAnsiblePlaybook(unittest.TestCase):
    def setUp(self) -> None:
        patcher = unittest.mock.patch(
            "cli.administration.deploy.dedicated.runner.deploy_ansible_playbook",
            return_value=_ANSIBLE_PLAYBOOK,
        )
        patcher.start()
        self.addCleanup(patcher.stop)

    def _fake_run_side_effect(
        self,
        calls_store: list[tuple[list[str], dict[str, Any]]],
        ansible_rc: int = 0,
    ):
        """
        Side effect for subprocess.run that:
        - records all commands + kwargs to calls_store
        - returns a CompletedProcess with ansible_rc for ansible-playbook
        - returns success (rc=0) for all other commands
        """

        def _side_effect(cmd, *args, **kwargs):
            norm_cmd = cmd if isinstance(cmd, list) else [cmd]

            calls_store.append((norm_cmd, dict(kwargs)))

            if norm_cmd and norm_cmd[0] == _ANSIBLE_PLAYBOOK:
                return subprocess.CompletedProcess(
                    norm_cmd,
                    ansible_rc,
                    stdout="ANSIBLE_STDOUT\n",
                    stderr="ANSIBLE_STDERR\n",
                )

            return subprocess.CompletedProcess(norm_cmd, 0, stdout="", stderr="")

        return _side_effect

    @unittest.mock.patch("subprocess.run")
    def test_run_ansible_playbook_builds_correct_command_and_uses_repo_root_cwd(
        self, mock_run
    ):
        calls: list[tuple[list[str], dict[str, Any]]] = []
        mock_run.side_effect = self._fake_run_side_effect(calls, ansible_rc=0)

        repo_root = "/repo"
        playbook_path = "/repo/playbook.yml"
        inventory_validator_path = (
            "/repo/cli/administration/inventory/validate/__main__.py"
        )

        modes: dict[str, Any] = {
            "MODE_CLEANUP": True,
            "MODE_ASSERT": True,
            "MODE_DEBUG": True,
        }

        inventory_path = "/etc/inventories/github-ci/devices.yml"
        limit = "localhost"
        allowed_apps = ["web-app-foo", "web-app-bar"]
        password_file = "/etc/inventories/github-ci/.password"

        with unittest.mock.patch(
            "cli.administration.deploy.dedicated.runner.assert_services_disabled_inventory_consistency_from_env"
        ) as mock_services_disabled_guard:
            runner.run_ansible_playbook(
                repo_root=repo_root,
                playbook_path=playbook_path,
                inventory_validator_path=inventory_validator_path,
                inventory=inventory_path,
                modes=modes,
                limit=limit,
                allowed_applications=allowed_apps,
                password_file=password_file,
                verbose=1,
                skip_build=False,
                diff=True,
                ansible_args=None,
            )

        mock_services_disabled_guard.assert_called_once()

        def was_called(cmd: list[str]) -> bool:
            return any(call_cmd == cmd for call_cmd, _kw in calls)

        self.assertFalse(
            was_called(["make", "clean"]),
            "MODE_CLEANUP tidies the deployed system, so it must not git-clean "
            "the control checkout and delete the inventory being deployed",
        )
        self.assertTrue(was_called(["make", "setup"]), "Expected 'make setup'")

        for call_cmd, kw in calls:
            if call_cmd and call_cmd[0] == "make":
                self.assertEqual(
                    kw.get("cwd"),
                    repo_root,
                    f"Expected make call to use cwd={repo_root}, got {kw.get('cwd')}",
                )

        inv_calls = [
            (call_cmd, kw)
            for call_cmd, kw in calls
            if isinstance(call_cmd, list)
            and any("validate/__main__.py" in part for part in call_cmd)
        ]
        self.assertTrue(
            inv_calls,
            "Expected inventory validation call (... validate/__main__.py ...)",
        )
        for _call_cmd, kw in inv_calls:
            self.assertEqual(kw.get("cwd"), repo_root)

        self.assertGreaterEqual(len(calls), 1)
        last_cmd, last_kw = calls[-1]
        self.assertEqual(last_cmd[0], _ANSIBLE_PLAYBOOK)
        self.assertEqual(last_kw.get("cwd"), repo_root)

        self.assertIn("-i", last_cmd)
        self.assertIn(inventory_path, last_cmd)
        idx_inv = last_cmd.index(inventory_path)
        self.assertGreater(len(last_cmd), idx_inv + 1)
        self.assertEqual(last_cmd[idx_inv + 1], playbook_path)

        self.assertIn("-l", last_cmd)
        self.assertIn(limit, last_cmd)

        last_cmd_str = " ".join(last_cmd)
        self.assertIn("APPLICATIONS_WHITELIST=web-app-foo,web-app-bar", last_cmd_str)

        modes_index = len(last_cmd) - 1 - last_cmd[::-1].index("-e")
        self.assertEqual(
            json.loads(last_cmd[modes_index + 1]),
            {"MODE_CLEANUP": True, "MODE_ASSERT": True, "MODE_DEBUG": True},
        )

        self.assertIn("--vault-password-file", last_cmd)
        self.assertIn(password_file, last_cmd)

        self.assertIn("--diff", last_cmd)

        self.assertTrue(
            any(arg.startswith("-vvv") for arg in last_cmd),
            "Expected at least -vvv because MODE_DEBUG=True",
        )

        self.assertNotIn("text", last_kw)
        self.assertNotIn("capture_output", last_kw)

    @unittest.mock.patch("subprocess.run")
    def test_run_ansible_playbook_appends_passthrough_args_last_for_overrides(
        self, mock_run
    ):
        calls: list[tuple[list[str], dict[str, Any]]] = []
        mock_run.side_effect = self._fake_run_side_effect(calls, ansible_rc=0)

        repo_root = "/repo"
        playbook_path = "/repo/playbook.yml"
        inventory_validator_path = (
            "/repo/cli/administration/inventory/validate/__main__.py"
        )

        modes: dict[str, Any] = {
            "MODE_CLEANUP": False,
            "MODE_ASSERT": False,
            "MODE_DEBUG": False,
        }

        inventory_path = "/etc/inventories/github-ci/devices.yml"

        passthrough = [
            "--tags",
            "deploy",
            "-e",
            "APPLICATIONS_WHITELIST=override-app",
            "-e",
            "MODE_DEBUG=true",
        ]

        with unittest.mock.patch(
            "cli.administration.deploy.dedicated.runner.assert_services_disabled_inventory_consistency_from_env"
        ):
            runner.run_ansible_playbook(
                repo_root=repo_root,
                playbook_path=playbook_path,
                inventory_validator_path=inventory_validator_path,
                inventory=inventory_path,
                modes=modes,
                limit=None,
                allowed_applications=["web-app-foo"],
                password_file=None,
                verbose=0,
                skip_build=True,
                diff=False,
                ansible_args=passthrough,
            )

        last_cmd, _last_kw = calls[-1]
        self.assertEqual(last_cmd[0], _ANSIBLE_PLAYBOOK)

        self.assertGreaterEqual(len(last_cmd), len(passthrough))
        self.assertEqual(last_cmd[-len(passthrough) :], passthrough)

        cmd_str = " ".join(last_cmd)
        self.assertIn("APPLICATIONS_WHITELIST=web-app-foo", cmd_str)
        self.assertIn("APPLICATIONS_WHITELIST=override-app", cmd_str)

    @unittest.mock.patch("subprocess.run")
    def test_run_ansible_playbook_failure_exits_with_code_and_skips_phases(
        self, mock_run
    ):
        calls: list[tuple[list[str], dict[str, Any]]] = []
        mock_run.side_effect = self._fake_run_side_effect(calls, ansible_rc=4)

        repo_root = "/repo"
        playbook_path = "/repo/playbook.yml"
        inventory_validator_path = (
            "/repo/cli/administration/inventory/validate/__main__.py"
        )

        modes: dict[str, Any] = {
            "MODE_CLEANUP": False,
            "MODE_ASSERT": False,
            "MODE_DEBUG": False,
        }

        with (
            unittest.mock.patch(
                "cli.administration.deploy.dedicated.runner.assert_services_disabled_inventory_consistency_from_env"
            ),
            self.assertRaises(SystemExit) as ctx,
        ):
            runner.run_ansible_playbook(
                repo_root=repo_root,
                playbook_path=playbook_path,
                inventory_validator_path=inventory_validator_path,
                inventory="/etc/inventories/github-ci/devices.yml",
                modes=modes,
                limit=None,
                allowed_applications=None,
                password_file=None,
                verbose=0,
                skip_build=True,
                diff=False,
                ansible_args=None,
            )

        self.assertEqual(ctx.exception.code, 4)

        self.assertTrue(
            any(
                call_cmd and call_cmd[0] == _ANSIBLE_PLAYBOOK for call_cmd, _kw in calls
            ),
            "ansible-playbook should have been invoked once in the error path",
        )

        self.assertFalse(any(call_cmd == ["make", "clean"] for call_cmd, _kw in calls))
        self.assertFalse(any(call_cmd == ["make", "setup"] for call_cmd, _kw in calls))
        self.assertFalse(
            any(
                any("validate/__main__.py" in part for part in call_cmd)
                for call_cmd, _kw in calls
            ),
            "Inventory validation should be skipped when MODE_ASSERT is False",
        )

    @unittest.mock.patch("subprocess.run")
    def test_run_ansible_playbook_fails_early_on_services_disabled_conflict(
        self, mock_run
    ):
        calls: list[tuple[list[str], dict[str, Any]]] = []
        mock_run.side_effect = self._fake_run_side_effect(calls, ansible_rc=0)

        with (
            unittest.mock.patch(
                "cli.administration.deploy.dedicated.runner.assert_services_disabled_inventory_consistency_from_env",
                side_effect=ServicesDisabledConflictError("boom"),
            ),
            self.assertRaises(SystemExit) as ctx,
        ):
            runner.run_ansible_playbook(
                repo_root="/repo",
                playbook_path="/repo/playbook.yml",
                inventory_validator_path="/repo/cli/administration/inventory/validate/__main__.py",
                inventory="/etc/inventories/github-ci/devices.yml",
                modes={
                    "MODE_CLEANUP": False,
                    "MODE_ASSERT": True,
                    "MODE_DEBUG": False,
                },
                limit=None,
                allowed_applications=None,
                password_file=None,
                verbose=0,
                skip_build=True,
                diff=False,
                ansible_args=None,
            )

        self.assertEqual(ctx.exception.code, 1)
        self.assertFalse(
            any(call_cmd and call_cmd[0] == _ANSIBLE_PLAYBOOK for call_cmd, _ in calls)
        )


class TestDeployAnsiblePlaybook(unittest.TestCase):
    def _checkout(self, deploy: list[str], with_playbook: bool) -> tuple[str, Path]:
        tmp = tempfile.TemporaryDirectory(prefix="deploy-extra-")
        self.addCleanup(tmp.cleanup)
        root = Path(tmp.name)
        entries = ", ".join(json.dumps(requirement) for requirement in deploy)
        (root / "pyproject.toml").write_text(
            f"[project.optional-dependencies]\ndeploy = [{entries}]\n",
            encoding="utf-8",
        )
        bindir = root / "venv" / "bin"
        bindir.mkdir(parents=True)
        if with_playbook:
            (bindir / "ansible-playbook").write_text("", encoding="utf-8")
        return str(root), bindir

    def _resolve(self, repo_root: str, bindir: Path) -> str:
        with unittest.mock.patch.object(
            runner.sys, "executable", str(bindir / "python")
        ):
            return runner.deploy_ansible_playbook(repo_root)

    def test_returns_the_playbook_beside_an_interpreter_with_the_deploy_extra(self):
        repo_root, bindir = self._checkout(
            ["PyYAML>=6", "ruamel.yaml", "humanfriendly"], with_playbook=True
        )
        self.assertEqual(
            self._resolve(repo_root, bindir), str(bindir / "ansible-playbook")
        )

    def test_exits_naming_a_deploy_distribution_the_interpreter_lacks(self):
        absent = "no-such-deploy-dist @ https://example.invalid/x.zip"
        repo_root, bindir = self._checkout(["PyYAML", absent], with_playbook=True)
        stderr = io.StringIO()
        with (
            unittest.mock.patch.object(runner.sys, "stderr", stderr),
            self.assertRaises(SystemExit) as ctx,
        ):
            self._resolve(repo_root, bindir)
        self.assertEqual(ctx.exception.code, 1)
        self.assertIn(absent, stderr.getvalue())
        self.assertNotIn("PyYAML", stderr.getvalue())

    def test_exits_when_no_ansible_playbook_sits_beside_the_interpreter(self):
        repo_root, bindir = self._checkout(["PyYAML"], with_playbook=False)
        with (
            unittest.mock.patch.object(runner.sys, "stderr", io.StringIO()),
            self.assertRaises(SystemExit) as ctx,
        ):
            self._resolve(repo_root, bindir)
        self.assertEqual(ctx.exception.code, 1)

    @unittest.mock.patch("subprocess.run")
    def test_missing_deploy_distribution_stops_the_run_before_any_phase(self, mock_run):
        repo_root, bindir = self._checkout(
            ["no-such-deploy-dist>=1"], with_playbook=True
        )
        with (
            unittest.mock.patch.object(
                runner.sys, "executable", str(bindir / "python")
            ),
            unittest.mock.patch.object(runner.sys, "stderr", io.StringIO()),
            self.assertRaises(SystemExit) as ctx,
        ):
            runner.run_ansible_playbook(
                repo_root=repo_root,
                playbook_path=f"{repo_root}/playbook.yml",
                inventory_validator_path=f"{repo_root}/validate/__main__.py",
                inventory=f"{repo_root}/devices.yml",
                modes={"MODE_ASSERT": True},
                skip_build=False,
            )
        self.assertEqual(ctx.exception.code, 1)
        mock_run.assert_not_called()


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