"""Contract tests for the CLI dispatcher (the second face of the same tools)."""

import json

import httpx
import respx

from server.gitea_mcp import TOOLS, dispatch, main

BASE = "https://gitea.test/api/v1"


# ── Registry parity ─────────────────────────────────────────────────────────────

def test_tools_registry_matches_count():
    # Same number the smoke test asserts for MCP registration.
    assert len(TOOLS) == 66


def test_every_tool_is_callable():
    assert all(callable(fn) for fn in TOOLS.values())


# ── serve vs CLI routing ────────────────────────────────────────────────────────

def test_no_args_means_serve():
    assert dispatch([]) is None


def test_serve_subcommand_means_serve():
    assert dispatch(["serve"]) is None


# ── Discovery ───────────────────────────────────────────────────────────────────

def test_list_tools_payload():
    env = dispatch(["list-tools"])
    assert env["success"] is True
    assert env["data"]["count"] == 66
    names = {t["name"] for t in env["data"]["tools"]}
    assert "get_repo" in names
    # parameter spec carries name/type/required
    get_repo = next(t for t in env["data"]["tools"] if t["name"] == "get_repo")
    owner = next(p for p in get_repo["params"] if p["name"] == "owner")
    assert owner["required"] is True
    assert owner["type"] == "str"


# ── Happy path: flags map to a correct REST call ────────────────────────────────

@respx.mock
def test_dispatch_happy_path():
    route = respx.get(f"{BASE}/repos/andrey/infra").mock(
        return_value=httpx.Response(200, json={"name": "infra", "id": 7})
    )
    env = dispatch(["get_repo", "--owner", "andrey", "--repo", "infra"])
    assert route.called
    assert env["success"] is True
    assert env["data"]["name"] == "infra"


@respx.mock
def test_int_flag_is_typed():
    route = respx.get(f"{BASE}/user/repos").mock(return_value=httpx.Response(200, json=[]))
    dispatch(["list_my_repos", "--limit", "5", "--page", "2"])
    params = dict(route.calls[0].request.url.params)
    assert params["limit"] == "5"
    assert params["page"] == "2"


@respx.mock
def test_bool_no_flag_sends_false():
    route = respx.post(f"{BASE}/user/repos").mock(
        return_value=httpx.Response(201, json={"name": "x"})
    )
    dispatch(["create_repo", "--name", "x", "--no-private", "--no-auto-init"])
    body = json.loads(route.calls[0].request.content)
    assert body["private"] is False
    assert body["auto_init"] is False


@respx.mock
def test_list_flag_takes_multiple_values():
    route = respx.put(f"{BASE}/repos/o/r/topics").mock(return_value=httpx.Response(204))
    dispatch(["set_repo_topics", "--owner", "o", "--repo", "r", "--topics", "ci", "backend"])
    body = json.loads(route.calls[0].request.content)
    assert body["topics"] == ["ci", "backend"]


# ── Error handling ──────────────────────────────────────────────────────────────

def test_unknown_command():
    env = dispatch(["no_such_tool"])
    assert env["success"] is False
    assert env["type"] == "UnknownCommand"


def test_missing_required_flag_is_usage_error():
    env = dispatch(["get_repo", "--owner", "andrey"])  # no --repo
    assert env["success"] is False
    assert env["type"] == "UsageError"


@respx.mock
def test_api_error_is_propagated_as_envelope():
    respx.get(f"{BASE}/repos/o/missing").mock(
        return_value=httpx.Response(404, json={"message": "not found"})
    )
    env = dispatch(["get_repo", "--owner", "o", "--repo", "missing"])
    assert env["success"] is False
    assert "404" in env["error"]


# ── main() prints exactly one JSON object and exits 0 ───────────────────────────

@respx.mock
def test_main_prints_single_json_and_exits_zero(capsys, monkeypatch):
    respx.get(f"{BASE}/repos/o/r").mock(return_value=httpx.Response(200, json={"name": "r"}))
    monkeypatch.setattr("sys.argv", ["gitea_mcp.py", "get_repo", "--owner", "o", "--repo", "r"])
    try:
        main()
    except SystemExit as e:
        assert e.code == 0
    out = capsys.readouterr().out.strip()
    parsed = json.loads(out)  # exactly one JSON object
    assert parsed["success"] is True