from __future__ import annotations

import ast
import importlib.util
import io
import json
import sys
import urllib.error
from pathlib import Path
from typing import Sequence

import pytest
import tomllib

ROOT = Path(__file__).resolve().parents[1]


def _load_update_script_module():
    """Load the maintenance script as a module so tests exercise real helpers."""
    script_path = ROOT / "scripts" / "update_sdk_artifacts.py"
    spec = importlib.util.spec_from_file_location("update_sdk_artifacts", script_path)
    if spec is None or spec.loader is None:
        raise AssertionError(f"Failed to load script module: {script_path}")
    module = importlib.util.module_from_spec(spec)
    sys.modules[spec.name] = module
    spec.loader.exec_module(module)
    return module


def _load_runtime_setup_module():
    """Load runtime setup without importing the SDK package under test."""
    runtime_setup_path = ROOT / "_runtime_setup.py"
    spec = importlib.util.spec_from_file_location("_runtime_setup", runtime_setup_path)
    if spec is None or spec.loader is None:
        raise AssertionError(f"Failed to load runtime setup module: {runtime_setup_path}")
    module = importlib.util.module_from_spec(spec)
    sys.modules[spec.name] = module
    spec.loader.exec_module(module)
    return module


def test_generation_has_single_maintenance_entrypoint_script() -> None:
    """Keep artifact workflows routed through one script instead of side entrypoints."""
    scripts = sorted(p.name for p in (ROOT / "scripts").glob("*.py"))
    assert scripts == ["update_sdk_artifacts.py"]


def test_root_fmt_recipe_formats_rust_and_python_sdk() -> None:
    """The repo fmt command should work from Rust and Python SDK directories."""
    justfile = ROOT.parents[1] / "justfile"
    lines = justfile.read_text().splitlines()
    fmt_index = lines.index("fmt:")
    next_recipe_index = next(
        index
        for index in range(fmt_index + 1, len(lines))
        if lines[index] and not lines[index].startswith((" ", "\t", "#"))
    )
    fmt_recipe = lines[fmt_index:next_recipe_index]
    actual = {
        "working_directory": lines[0],
        "previous_attribute": lines[fmt_index - 1],
        "commands": [line.strip() for line in fmt_recipe[1:] if line.strip()],
    }
    expected = {
        "working_directory": 'set working-directory := "codex-rs"',
        "previous_attribute": "# Format Rust and Python SDK code.",
        "commands": [
            "cargo fmt -- --config imports_granularity=Item 2>/dev/null",
            "uv run --frozen --project ../sdk/python --extra dev ruff check --fix --fix-only ../sdk/python",
            "uv run --frozen --project ../sdk/python --extra dev ruff format ../sdk/python",
        ],
    }

    assert actual == expected, (
        "The root `just fmt` recipe must run Rust fmt and Python SDK Ruff. "
        "Fix the `fmt` recipe in `justfile`, then run `just fmt`.\n"
        f"Expected: {json.dumps(expected, indent=2)}\n"
        f"Actual: {json.dumps(actual, indent=2)}"
    )


def test_generate_types_wires_all_generation_steps() -> None:
    """The type generation command should refresh every schema-derived artifact."""
    source = (ROOT / "scripts" / "update_sdk_artifacts.py").read_text()
    tree = ast.parse(source)

    generate_types_fn = next(
        (
            node
            for node in tree.body
            if isinstance(node, ast.FunctionDef) and node.name == "generate_types_from_schema_dir"
        ),
        None,
    )
    assert generate_types_fn is not None

    calls: list[str] = []
    for node in generate_types_fn.body:
        if isinstance(node, ast.Expr) and isinstance(node.value, ast.Call):
            fn = node.value.func
            if isinstance(fn, ast.Name):
                calls.append(fn.id)

    assert calls == [
        "generate_v2_all",
        "generate_notification_registry",
        "generate_public_api_flat_methods",
    ]


def _load_runtime_schema_bundle(tmp_path: Path) -> dict:
    """Ask the pinned runtime package for a real schema bundle used by tests."""
    script = _load_update_script_module()
    schema_dir = script.generate_schema_from_pinned_runtime(tmp_path / "schema")
    return json.loads(script.schema_bundle_path(schema_dir).read_text())


def test_schema_normalization_only_flattens_string_literal_oneofs(
    tmp_path: Path,
) -> None:
    """Schema normalization should only flatten the enum-shaped oneOf variants."""
    script = _load_update_script_module()
    schema = _load_runtime_schema_bundle(tmp_path)
    definitions = schema["definitions"]
    flattened = [
        name
        for name, definition in definitions.items()
        if isinstance(definition, dict) and script._flatten_string_enum_one_of(definition.copy())
    ]

    assert flattened == [
        "MessagePhase",
        "TurnItemsView",
        "PluginAvailability",
        "AuthMode",
        "InputModality",
        "ExperimentalFeatureStage",
        "CommandExecOutputStream",
        "ProcessOutputStream",
    ]


def test_python_codegen_schema_annotation_adds_stable_variant_titles(
    tmp_path: Path,
) -> None:
    """Schema annotations should give generated protocol classes stable names."""
    script = _load_update_script_module()
    schema = _load_runtime_schema_bundle(tmp_path)
    script._annotate_schema(schema)
    definitions = schema["definitions"]

    server_notification_titles = {
        variant.get("title")
        for variant in definitions["ServerNotification"]["oneOf"]
        if isinstance(variant, dict)
    }
    assert "ErrorServerNotification" in server_notification_titles
    assert "ThreadStartedServerNotification" in server_notification_titles
    assert "ErrorNotification" not in server_notification_titles
    assert "Thread/startedNotification" not in server_notification_titles

    ask_for_approval_titles = [
        variant.get("title") for variant in definitions["AskForApproval"]["oneOf"]
    ]
    assert ask_for_approval_titles == [
        "AskForApprovalValue",
        "GranularAskForApproval",
    ]

    reasoning_summary_titles = [
        variant.get("title") for variant in definitions["ReasoningSummary"]["oneOf"]
    ]
    assert reasoning_summary_titles == [
        "ReasoningSummaryValue",
        "NoneReasoningSummary",
    ]


def test_generate_v2_all_uses_titles_for_generated_names() -> None:
    source = (ROOT / "scripts" / "update_sdk_artifacts.py").read_text()
    assert "--use-title-as-name" in source
    assert "--use-annotated" in source
    assert "--formatters" in source
    assert "ruff-format" in source


def test_runtime_package_template_has_no_checked_in_binaries() -> None:
    runtime_root = ROOT.parent / "python-runtime" / "src" / "codex_cli_bin"
    assert sorted(
        path.name
        for path in runtime_root.rglob("*")
        if path.is_file() and "__pycache__" not in path.parts
    ) == ["__init__.py"]


def test_examples_readme_points_to_runtime_version_source_of_truth() -> None:
    """Document that examples should point at the dependency pin, not release lore."""
    readme = (ROOT / "examples" / "README.md").read_text()
    assert "The pinned runtime version comes from the SDK package dependency." in readme


def test_runtime_distribution_name_is_consistent() -> None:
    script = _load_update_script_module()
    runtime_setup = _load_runtime_setup_module()
    from openai_codex import _version, client as client_module

    assert script.SDK_DISTRIBUTION_NAME == "openai-codex"
    assert runtime_setup.SDK_PACKAGE_NAME == "openai-codex"
    assert _version.DISTRIBUTION_NAME == "openai-codex"
    assert script.RUNTIME_DISTRIBUTION_NAME == "openai-codex-cli-bin"
    assert runtime_setup.PACKAGE_NAME == "openai-codex-cli-bin"
    assert client_module.RUNTIME_PKG_NAME == "openai-codex-cli-bin"
    assert (
        "importlib.metadata.version('codex-cli-bin')"
        not in (ROOT / "_runtime_setup.py").read_text()
    )


def test_source_sdk_package_pins_published_runtime() -> None:
    """The source package metadata should pin the runtime wheel that ships schemas."""
    script = _load_update_script_module()
    pyproject = tomllib.loads((ROOT / "pyproject.toml").read_text())

    assert {
        "sdk_version": pyproject["project"]["version"],
        "runtime_pin": script.pinned_runtime_version(),
        "dependencies": pyproject["project"]["dependencies"],
    } == {
        "sdk_version": "0.131.0a4",
        "runtime_pin": "0.131.0a4",
        "dependencies": [
            "pydantic>=2.12",
            "openai-codex-cli-bin==0.131.0a4",
        ],
    }


def test_release_metadata_retries_without_invalid_auth(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    runtime_setup = _load_runtime_setup_module()
    authorizations: list[str | None] = []

    def fake_urlopen(request):
        authorization = request.headers.get("Authorization")
        authorizations.append(authorization)
        if authorization is not None:
            raise urllib.error.HTTPError(
                request.full_url,
                401,
                "Unauthorized",
                hdrs=None,
                fp=None,
            )
        return io.StringIO('{"assets": []}')

    monkeypatch.setenv("GH_TOKEN", "invalid-token")
    monkeypatch.setattr(runtime_setup.urllib.request, "urlopen", fake_urlopen)

    assert runtime_setup._release_metadata("1.2.3") == {"assets": []}
    assert authorizations == ["Bearer invalid-token", None]


def test_runtime_setup_uses_pep440_package_version_and_codex_release_tags() -> None:
    """The SDK uses PEP 440 package pins and converts only when fetching releases."""
    runtime_setup = _load_runtime_setup_module()
    pyproject = tomllib.loads((ROOT / "pyproject.toml").read_text())

    assert runtime_setup.PACKAGE_NAME == "openai-codex-cli-bin"
    assert runtime_setup.pinned_runtime_version() == pyproject["project"]["version"]
    assert (
        f"{runtime_setup.PACKAGE_NAME}=={pyproject['project']['version']}"
        in pyproject["project"]["dependencies"]
    )
    assert runtime_setup._normalized_package_version("rust-v0.116.0-alpha.1") == "0.116.0a1"
    assert runtime_setup._release_tag("0.116.0a1") == "rust-v0.116.0-alpha.1"


def test_runtime_package_is_wheel_only_and_builds_platform_specific_wheels() -> None:
    pyproject = tomllib.loads((ROOT.parent / "python-runtime" / "pyproject.toml").read_text())
    hook_source = (ROOT.parent / "python-runtime" / "hatch_build.py").read_text()
    hook_tree = ast.parse(hook_source)
    initialize_fn = next(
        node
        for node in ast.walk(hook_tree)
        if isinstance(node, ast.FunctionDef) and node.name == "initialize"
    )

    sdist_guard = next(
        (
            node
            for node in initialize_fn.body
            if isinstance(node, ast.If)
            and isinstance(node.test, ast.Compare)
            and isinstance(node.test.left, ast.Attribute)
            and isinstance(node.test.left.value, ast.Name)
            and node.test.left.value.id == "self"
            and node.test.left.attr == "target_name"
            and len(node.test.ops) == 1
            and isinstance(node.test.ops[0], ast.Eq)
            and len(node.test.comparators) == 1
            and isinstance(node.test.comparators[0], ast.Constant)
            and node.test.comparators[0].value == "sdist"
        ),
        None,
    )
    build_data_assignments = {}
    for node in initialize_fn.body:
        if (
            not isinstance(node, ast.Assign)
            or len(node.targets) != 1
            or not isinstance(node.targets[0], ast.Subscript)
            or not isinstance(node.targets[0].value, ast.Name)
            or node.targets[0].value.id != "build_data"
            or not isinstance(node.targets[0].slice, ast.Constant)
            or not isinstance(node.targets[0].slice.value, str)
        ):
            continue
        if isinstance(node.value, ast.Constant):
            build_data_assignments[node.targets[0].slice.value] = node.value.value
        elif isinstance(node.value, ast.JoinedStr):
            build_data_assignments[node.targets[0].slice.value] = "joined-string"

    assert pyproject["project"]["name"] == "openai-codex-cli-bin"
    assert pyproject["tool"]["hatch"]["build"]["targets"]["wheel"] == {
        "packages": ["src/codex_cli_bin"],
        "include": ["src/codex_cli_bin/bin/**"],
        "hooks": {"custom": {}},
    }
    assert pyproject["tool"]["hatch"]["build"]["targets"]["sdist"] == {
        "hooks": {"custom": {}},
    }
    assert sdist_guard is not None
    assert build_data_assignments == {
        "pure_python": False,
        "infer_tag": False,
        "tag": "joined-string",
    }


def test_stage_runtime_release_copies_binary_and_sets_version(tmp_path: Path) -> None:
    script = _load_update_script_module()
    fake_binary = tmp_path / script.runtime_binary_name()
    fake_binary.write_text("fake codex\n")

    staged = script.stage_python_runtime_package(
        tmp_path / "runtime-stage",
        "1.2.3",
        fake_binary,
    )

    assert staged == tmp_path / "runtime-stage"
    assert script.staged_runtime_bin_path(staged).read_text() == "fake codex\n"
    assert 'name = "openai-codex-cli-bin"' in (staged / "pyproject.toml").read_text()
    assert 'version = "1.2.3"' in (staged / "pyproject.toml").read_text()


def test_normalize_codex_version_accepts_release_tags_and_pep440_versions() -> None:
    script = _load_update_script_module()

    assert script.normalize_codex_version("rust-v0.116.0-alpha.1") == "0.116.0a1"
    assert script.normalize_codex_version("v0.116.0-beta.2") == "0.116.0b2"
    assert script.normalize_codex_version("0.116.0rc3") == "0.116.0rc3"
    assert script.normalize_codex_version("0.116.0") == "0.116.0"


def test_stage_runtime_release_replaces_existing_staging_dir(tmp_path: Path) -> None:
    script = _load_update_script_module()
    staging_dir = tmp_path / "runtime-stage"
    old_file = staging_dir / "stale.txt"
    old_file.parent.mkdir(parents=True)
    old_file.write_text("stale")

    fake_binary = tmp_path / script.runtime_binary_name()
    fake_binary.write_text("fake codex\n")

    staged = script.stage_python_runtime_package(
        staging_dir,
        "1.2.3",
        fake_binary,
    )

    assert staged == staging_dir
    assert not old_file.exists()
    assert script.staged_runtime_bin_path(staged).read_text() == "fake codex\n"


def test_stage_runtime_release_can_pin_wheel_platform_tag(tmp_path: Path) -> None:
    script = _load_update_script_module()
    fake_binary = tmp_path / script.runtime_binary_name()
    fake_binary.write_text("fake codex\n")

    staged = script.stage_python_runtime_package(
        tmp_path / "runtime-stage",
        "0.116.0a1",
        fake_binary,
        platform_tag="musllinux_1_1_x86_64",
    )

    pyproject = (staged / "pyproject.toml").read_text()
    assert 'platform-tag = "musllinux_1_1_x86_64"' in pyproject


def test_stage_runtime_release_copies_resource_binaries(tmp_path: Path) -> None:
    """Runtime staging should copy every helper binary into the wheel bin dir."""
    script = _load_update_script_module()
    fake_binary = tmp_path / script.runtime_binary_name()
    helper = tmp_path / "helper"
    fallback = tmp_path / "fallback-helper"
    fake_binary.write_text("fake codex\n")
    helper.write_text("fake helper\n")
    fallback.write_text("fake fallback\n")

    staged = script.stage_python_runtime_package(
        tmp_path / "runtime-stage",
        "1.2.3",
        fake_binary,
        resource_binaries=(helper, fallback),
    )

    assert {
        path.relative_to(staged / "src" / "codex_cli_bin" / "bin").as_posix(): path.read_text()
        for path in (staged / "src" / "codex_cli_bin" / "bin").iterdir()
    } == {
        script.runtime_binary_name(): "fake codex\n",
        "fallback-helper": "fake fallback\n",
        "helper": "fake helper\n",
    }


def test_runtime_resource_binaries_are_included_by_wheel_config(
    tmp_path: Path,
) -> None:
    """The runtime wheel config should include helper binaries beside Codex."""
    script = _load_update_script_module()
    fake_binary = tmp_path / script.runtime_binary_name()
    helper = tmp_path / "helper"
    fake_binary.write_text("fake codex\n")
    helper.write_text("fake helper\n")

    staged = script.stage_python_runtime_package(
        tmp_path / "runtime-stage",
        "1.2.3",
        fake_binary,
        resource_binaries=(helper,),
    )

    pyproject = tomllib.loads((staged / "pyproject.toml").read_text())
    assert {
        "include": pyproject["tool"]["hatch"]["build"]["targets"]["wheel"]["include"],
        "helper": (staged / "src" / "codex_cli_bin" / "bin" / "helper").read_text(),
    } == {
        "include": ["src/codex_cli_bin/bin/**"],
        "helper": "fake helper\n",
    }


def test_stage_sdk_release_injects_exact_runtime_pin(tmp_path: Path) -> None:
    script = _load_update_script_module()
    staged = script.stage_python_sdk_package(
        tmp_path / "sdk-stage",
        "rust-v0.116.0-alpha.1",
    )

    pyproject = (staged / "pyproject.toml").read_text()
    assert 'name = "openai-codex"' in pyproject
    assert 'version = "0.116.0a1"' in pyproject
    assert '"openai-codex-cli-bin==0.116.0a1"' in pyproject
    assert (
        '__version__ = "0.116.0a1"'
        not in (staged / "src" / "openai_codex" / "__init__.py").read_text()
    )
    assert (
        'client_version: str = "0.116.0a1"'
        not in (staged / "src" / "openai_codex" / "client.py").read_text()
    )
    assert not any((staged / "src" / "openai_codex").glob("bin/**"))


def test_stage_sdk_release_replaces_existing_staging_dir(tmp_path: Path) -> None:
    script = _load_update_script_module()
    staging_dir = tmp_path / "sdk-stage"
    old_file = staging_dir / "stale.txt"
    old_file.parent.mkdir(parents=True)
    old_file.write_text("stale")

    staged = script.stage_python_sdk_package(staging_dir, "0.116.0a1")

    assert staged == staging_dir
    assert not old_file.exists()


def test_staged_sdk_and_runtime_versions_match(tmp_path: Path) -> None:
    script = _load_update_script_module()
    fake_binary = tmp_path / script.runtime_binary_name()
    fake_binary.write_text("fake codex\n")

    sdk_stage = script.stage_python_sdk_package(
        tmp_path / "sdk-stage",
        "rust-v0.116.0-alpha.1",
    )
    runtime_stage = script.stage_python_runtime_package(
        tmp_path / "runtime-stage",
        "rust-v0.116.0-alpha.1",
        fake_binary,
    )

    sdk_pyproject = tomllib.loads((sdk_stage / "pyproject.toml").read_text())
    runtime_pyproject = tomllib.loads((runtime_stage / "pyproject.toml").read_text())

    assert sdk_pyproject["project"]["version"] == runtime_pyproject["project"]["version"]
    assert sdk_pyproject["project"]["dependencies"] == [
        "pydantic>=2.12",
        "openai-codex-cli-bin==0.116.0a1",
    ]


def test_stage_sdk_runs_type_generation_before_staging(tmp_path: Path) -> None:
    script = _load_update_script_module()
    calls: list[str] = []
    args = script.parse_args(
        [
            "stage-sdk",
            str(tmp_path / "sdk-stage"),
            "--codex-version",
            "rust-v0.116.0-alpha.1",
        ]
    )

    def fake_generate_types() -> None:
        calls.append("generate_types")

    def fake_stage_sdk_package(_staging_dir: Path, codex_version: str) -> Path:
        calls.append(f"stage_sdk:{codex_version}")
        return tmp_path / "sdk-stage"

    def fake_stage_runtime_package(
        _staging_dir: Path,
        _runtime_version: str,
        _runtime_binary: Path,
        _platform_tag: str | None,
        _resource_binaries: Sequence[Path],
    ) -> Path:
        raise AssertionError("runtime staging should not run for stage-sdk")

    def fake_current_sdk_version() -> str:
        return "0.116.0a1"

    ops = script.CliOps(
        generate_types=fake_generate_types,
        stage_python_sdk_package=fake_stage_sdk_package,
        stage_python_runtime_package=fake_stage_runtime_package,
        current_sdk_version=fake_current_sdk_version,
    )

    script.run_command(args, ops)

    assert calls == ["generate_types", "stage_sdk:0.116.0a1"]


def test_stage_sdk_rejects_mismatched_legacy_versions(tmp_path: Path) -> None:
    script = _load_update_script_module()
    args = script.parse_args(
        [
            "stage-sdk",
            str(tmp_path / "sdk-stage"),
            "--codex-version",
            "0.116.0a1",
            "--runtime-version",
            "0.116.0a1",
            "--sdk-version",
            "0.115.0",
        ]
    )

    with pytest.raises(RuntimeError, match="versions must match"):
        script.run_command(args, script.default_cli_ops())


def test_stage_runtime_stages_binary_without_type_generation(tmp_path: Path) -> None:
    script = _load_update_script_module()
    fake_binary = tmp_path / script.runtime_binary_name()
    helper = tmp_path / "helper"
    fallback = tmp_path / "fallback-helper"
    fake_binary.write_text("fake codex\n")
    helper.write_text("fake helper\n")
    fallback.write_text("fake fallback\n")
    calls: list[str] = []
    args = script.parse_args(
        [
            "stage-runtime",
            str(tmp_path / "runtime-stage"),
            str(fake_binary),
            "--codex-version",
            "rust-v0.116.0-alpha.1",
            "--platform-tag",
            "musllinux_1_1_x86_64",
            "--resource-binary",
            str(helper),
            "--resource-binary",
            str(fallback),
        ]
    )

    def fake_generate_types() -> None:
        calls.append("generate_types")

    def fake_stage_sdk_package(_staging_dir: Path, _codex_version: str) -> Path:
        raise AssertionError("sdk staging should not run for stage-runtime")

    def fake_stage_runtime_package(
        _staging_dir: Path,
        codex_version: str,
        _runtime_binary: Path,
        platform_tag: str | None,
        resource_binaries: Sequence[Path],
    ) -> Path:
        calls.append(
            f"stage_runtime:{codex_version}:{platform_tag}:"
            f"{','.join(path.name for path in resource_binaries)}"
        )
        return tmp_path / "runtime-stage"

    def fake_current_sdk_version() -> str:
        return "0.116.0a1"

    ops = script.CliOps(
        generate_types=fake_generate_types,
        stage_python_sdk_package=fake_stage_sdk_package,
        stage_python_runtime_package=fake_stage_runtime_package,
        current_sdk_version=fake_current_sdk_version,
    )

    script.run_command(args, ops)

    assert calls == ["stage_runtime:0.116.0a1:musllinux_1_1_x86_64:helper,fallback-helper"]


def test_default_runtime_is_resolved_from_installed_runtime_package(
    tmp_path: Path,
) -> None:
    from openai_codex import client as client_module

    fake_binary = tmp_path / ("codex.exe" if client_module.os.name == "nt" else "codex")
    fake_binary.write_text("")
    ops = client_module.CodexBinResolverOps(
        installed_codex_path=lambda: fake_binary,
        path_exists=lambda path: path == fake_binary,
    )

    config = client_module.AppServerConfig()
    assert config.codex_bin is None
    assert client_module.resolve_codex_bin(config, ops) == fake_binary


def test_explicit_codex_bin_override_takes_priority(tmp_path: Path) -> None:
    from openai_codex import client as client_module

    explicit_binary = tmp_path / (
        "custom-codex.exe" if client_module.os.name == "nt" else "custom-codex"
    )
    explicit_binary.write_text("")
    ops = client_module.CodexBinResolverOps(
        installed_codex_path=lambda: (_ for _ in ()).throw(
            AssertionError("packaged runtime should not be used")
        ),
        path_exists=lambda path: path == explicit_binary,
    )

    config = client_module.AppServerConfig(codex_bin=str(explicit_binary))
    assert client_module.resolve_codex_bin(config, ops) == explicit_binary


def test_missing_runtime_package_requires_explicit_codex_bin() -> None:
    from openai_codex import client as client_module

    ops = client_module.CodexBinResolverOps(
        installed_codex_path=lambda: (_ for _ in ()).throw(
            FileNotFoundError("missing packaged runtime")
        ),
        path_exists=lambda _path: False,
    )

    with pytest.raises(FileNotFoundError, match="missing packaged runtime"):
        client_module.resolve_codex_bin(client_module.AppServerConfig(), ops)


def test_broken_runtime_package_does_not_fall_back() -> None:
    from openai_codex import client as client_module

    ops = client_module.CodexBinResolverOps(
        installed_codex_path=lambda: (_ for _ in ()).throw(
            FileNotFoundError("missing packaged binary")
        ),
        path_exists=lambda _path: False,
    )

    with pytest.raises(FileNotFoundError) as exc_info:
        client_module.resolve_codex_bin(client_module.AppServerConfig(), ops)

    assert str(exc_info.value) == ("missing packaged binary")
