"""Schema tests — each MCP tool must mirror its CLI subcommand exactly."""

from __future__ import annotations

import argparse

import pytest

from metin_release.commands import (
    build_manifest,
    diff_remote,
    inspect,
    m2pack_build,
    m2pack_diff,
    m2pack_export_runtime_key,
    m2pack_verify,
    promote,
    publish,
    sign,
    upload_blobs,
    verify_public,
)
from metin_release_mcp.errors import UnknownToolError
from metin_release_mcp.server import dispatch
from metin_release_mcp.tool_defs import (
    TOOL_SPECS,
    TOOLS_BY_NAME,
    build_cli_args,
    json_schema,
)


EXPECTED_TOOL_NAMES = {
    "release_inspect",
    "release_build_manifest",
    "release_sign",
    "release_diff_remote",
    "release_upload_blobs",
    "release_promote",
    "release_verify_public",
    "release_publish",
    "m2pack_build",
    "m2pack_verify",
    "m2pack_diff",
    "m2pack_export_runtime_key",
}


def test_tool_catalogue_is_exactly_the_phase_one_plus_four_set():
    assert {t.name for t in TOOL_SPECS} == EXPECTED_TOOL_NAMES
    assert len(TOOL_SPECS) == 12


def test_every_tool_has_known_group_and_description():
    for spec in TOOL_SPECS:
        assert spec.subcommand[0] in {"release", "m2pack"}
        assert spec.description.strip()
        schema = json_schema(spec)
        assert schema["type"] == "object"
        assert schema["additionalProperties"] is False


def _argparse_flags_for(add_parser_fn) -> dict[str, dict]:
    """Introspect a command's argparse signature.

    Returns a mapping from flag name (e.g. ``--source``) to a dict with
    ``required`` and ``kind`` ("boolean" for store_true, else "value").
    """
    parser = argparse.ArgumentParser()
    sub = parser.add_subparsers()
    sp = add_parser_fn(sub)
    out: dict[str, dict] = {}
    for action in sp._actions:
        if not action.option_strings:
            continue
        if action.dest in ("help",):
            continue
        flag = action.option_strings[0]
        is_bool = isinstance(action, argparse._StoreTrueAction)
        out[flag] = {"required": action.required, "kind": "boolean" if is_bool else "value"}
    return out


_COMMAND_MODULES = {
    "release_inspect": inspect,
    "release_build_manifest": build_manifest,
    "release_sign": sign,
    "release_diff_remote": diff_remote,
    "release_upload_blobs": upload_blobs,
    "release_promote": promote,
    "release_verify_public": verify_public,
    "release_publish": publish,
    "m2pack_build": m2pack_build,
    "m2pack_verify": m2pack_verify,
    "m2pack_diff": m2pack_diff,
    "m2pack_export_runtime_key": m2pack_export_runtime_key,
}


@pytest.mark.parametrize("tool_name", sorted(EXPECTED_TOOL_NAMES))
def test_schema_mirrors_argparse(tool_name):
    spec = TOOLS_BY_NAME[tool_name]
    mod = _COMMAND_MODULES[tool_name]
    argparse_flags = _argparse_flags_for(mod.add_parser)

    spec_flags = {f.cli_flag: f for f in spec.fields}
    assert set(spec_flags) == set(argparse_flags), (
        f"{tool_name}: spec flags {set(spec_flags)} != argparse flags {set(argparse_flags)}"
    )
    for flag, info in argparse_flags.items():
        field = spec_flags[flag]
        assert field.required == info["required"], f"{tool_name} {flag} required mismatch"
        if info["kind"] == "boolean":
            assert field.kind == "boolean", f"{tool_name} {flag} expected boolean"
        else:
            assert field.kind != "boolean", f"{tool_name} {flag} should not be boolean"


@pytest.mark.parametrize("tool_name", sorted(EXPECTED_TOOL_NAMES))
def test_required_fields_in_json_schema(tool_name):
    spec = TOOLS_BY_NAME[tool_name]
    schema = json_schema(spec)
    required_in_spec = {f.name for f in spec.fields if f.required}
    required_in_schema = set(schema.get("required", []))
    assert required_in_schema == required_in_spec


def test_unknown_tool_rejected_by_dispatch():
    with pytest.raises(UnknownToolError):
        dispatch("nope_not_a_tool", {})


def test_unknown_tool_name_not_in_catalogue():
    assert "release_rollback" not in TOOLS_BY_NAME
    assert "erp_reserve" not in TOOLS_BY_NAME
    assert "launcher_publish" not in TOOLS_BY_NAME


def test_build_cli_args_rejects_missing_required():
    from metin_release_mcp.errors import InvalidToolInputError

    spec = TOOLS_BY_NAME["release_inspect"]
    with pytest.raises(InvalidToolInputError):
        build_cli_args(spec, {})


def test_build_cli_args_rejects_unknown_fields():
    from metin_release_mcp.errors import InvalidToolInputError

    spec = TOOLS_BY_NAME["release_inspect"]
    with pytest.raises(InvalidToolInputError):
        build_cli_args(spec, {"source": "/x", "nonsense": 1})