from __future__ import annotations

import runpy
import subprocess
from pathlib import Path
from types import SimpleNamespace

import pytest


ROOT = Path(__file__).resolve().parents[3]
SMOKE = runpy.run_path(ROOT / "scripts" / "smoke-python-runtime.py")


@pytest.mark.parametrize(
    ("behavior", "error"),
    [
        ("read-current", None),
        ("no-verify-tool", "verify turn made no model-requested tool call"),
        ("no-create-tool", "create turn made no model-requested tool call"),
        ("create-error", "create turn ended with.*AUTH.*401"),
        ("stale-answer", "verify turn returned"),
        ("missing-create", "real-model tool turn did not create"),
        ("wrong-create", "real-model tool turn wrote unexpected text"),
        ("modify-verify", "real-model tool turn wrote unexpected text"),
    ],
)
def test_live_smoke_requires_fresh_file_observation(
    monkeypatch: pytest.MonkeyPatch, behavior: str, error: str | None,
) -> None:
    import deepseek_harness

    smoke_live = SMOKE["smoke_sdk_live"]
    sentinel = SMOKE["LIVE_API_SENTINEL"]
    prompts: list[str] = []
    session_ids: list[str] = []
    log_checks: list[Path] = []

    class ScriptedHarness:
        def __init__(self, *, cwd: str, **_kwargs: object) -> None:
            self.marker = Path(cwd) / "live-api-marker.txt"

        def __enter__(self) -> ScriptedHarness:
            return self

        def __exit__(self, *_args: object) -> None:
            pass

        def run(self, prompt: str, *, session_id: str) -> SimpleNamespace:
            prompts.append(prompt)
            session_ids.append(session_id)
            events = [{"type": "tool/call"}]
            if len(prompts) == 1:
                assert not self.marker.exists()
                if behavior == "create-error":
                    return SimpleNamespace(finish_reason="error", final_response="", events=[{
                        "type": "turn/end",
                        "data": {"turn": 1, "reason": {
                            "kind": "error", "error": {"code": "AUTH", "status": 401},
                        }},
                    }])
                if behavior == "no-create-tool":
                    events = []
                if behavior != "missing-create":
                    self.marker.write_text(
                        ("wrong" if behavior == "wrong-create" else sentinel) + "\n",
                        encoding="utf-8",
                    )
                response = sentinel
            else:
                current = self.marker.read_text(encoding="utf-8").strip()
                assert current != sentinel, "verification must require new world state"
                assert all(current not in text for text in prompts), "prompts must not reveal the answer"
                response = sentinel if behavior == "stale-answer" else current
                if behavior == "no-verify-tool":
                    events = []
                if behavior == "modify-verify":
                    self.marker.write_text("changed\n", encoding="utf-8")
            return SimpleNamespace(finish_reason="completed", final_response=response, events=events)

    monkeypatch.setenv("DEEPSEEK_API_KEY", "fixture-key")
    monkeypatch.setenv("DEEPSEEK_BASE_URL", "https://fixture.invalid")
    monkeypatch.setattr(deepseek_harness, "DeepSeekHarness", ScriptedHarness)
    monkeypatch.setitem(smoke_live.__globals__, "assert_zstd_session_log", log_checks.append)

    if error is None:
        smoke_live()
        assert len(prompts) == 2
        assert session_ids[0] == session_ids[1]
        assert len(log_checks) == 1
    else:
        with pytest.raises(AssertionError, match=error):
            smoke_live()
        assert not log_checks


@pytest.mark.parametrize(
    ("prompt_name", "expected"),
    [
        ("SNAPSHOT_DIRECT_CHILD_PROMPT", "DIRECT_CHILD_OK"),
        ("SNAPSHOT_WORKFLOW_CHILD_PROMPT", "WORKFLOW_CHILD_OK"),
    ],
)
def test_child_prompt_precedes_runtime_context(prompt_name: str, expected: str) -> None:
    chunks = SMOKE["completion_chunks"]({
        "messages": [
            {"role": "user", "content": SMOKE[prompt_name]},
            {"role": "user", "content": "Current runtime context"},
        ],
    })

    assert any(
        choice.get("delta", {}).get("content") == expected
        for chunk in chunks
        for choice in chunk.get("choices", [])
    )


def test_mcp_smoke_requests_the_discovered_tool() -> None:
    chunks = SMOKE["completion_chunks"]({
        "messages": [{"role": "user", "content": SMOKE["MCP_PROMPT"]}],
        "tools": [{"type": "function", "function": {"name": "mcp__fixture__add"}}],
    })

    calls = [
        call
        for chunk in chunks
        for choice in chunk.get("choices", [])
        for call in choice.get("delta", {}).get("tool_calls", [])
    ]
    assert calls[0]["function"] == {
        "name": "mcp__fixture__add",
        "arguments": '{"a": 19, "b": 23}',
    }


def test_mcp_smoke_accepts_the_external_server_result() -> None:
    chunks = SMOKE["completion_chunks"]({
        "messages": [
            {"role": "user", "content": SMOKE["MCP_PROMPT"]},
            {
                "role": "assistant",
                "tool_calls": [{
                    "id": "mcp-add",
                    "type": "function",
                    "function": {"name": "mcp__fixture__add", "arguments": '{}'},
                }],
            },
            {"role": "tool", "tool_call_id": "mcp-add", "content": "42"},
        ],
    })

    assert any(
        choice.get("delta", {}).get("content") == SMOKE["MCP_TEXT"]
        for chunk in chunks
        for choice in chunk.get("choices", [])
    )


def test_snapshot_comparison_normalizes_only_session_generation_provenance() -> None:
    normalize = SMOKE["normalize_session_format_comparison"]
    expected = {
        "header": {"type": "session", "version": 0, "otherVersion": 7},
        "accepted": {
            "type": "session-log-deepseek/delivery-accepted",
            "data": {"sessionId": "s", "throughSeq": 4},
        },
        "source": {
            "kind": "session-reference",
            "references": [{"sessionId": "other", "capturedThroughSeq": 8}],
        },
    }
    actual = {
        "header": {"type": "session", "version": 1, "otherVersion": 7},
        "accepted": {
            "type": "session-log-deepseek/delivery-accepted",
            "data": {"sessionId": "s", "sessionFormatVersion": 1, "throughSeq": 4},
        },
        "source": {
            "kind": "session-reference",
            "references": [{
                "sessionId": "other",
                "capturedFormatVersion": 1,
                "capturedThroughSeq": 8,
            }],
        },
    }

    assert normalize(expected) == normalize(actual)
    assert normalize(expected)["header"]["otherVersion"] == 7


def test_snapshot_value_normalizes_embedded_assistant_stream_timing() -> None:
    normalize = SMOKE["normalize_snapshot_value"]
    event = {
        "type": "assistant/message",
        "seq": 4,
        "time": 100,
        "data": {
            "stream": [
                {"type": "chunk", "time": 101, "chunk": {"type": "finish"}},
                {"type": "text-chunks", "time0": 102, "dt": [1, 2], "texts": ["a", "b", "c"]},
            ],
        },
    }

    normalized = normalize(event, [])

    assert normalized["time"] == 0
    assert normalized["data"]["stream"] == [
        {"type": "chunk", "time": 0, "chunk": {"type": "finish"}},
        {"type": "text-chunks", "time0": 0, "dt": [0, 0], "texts": ["a", "b", "c"]},
    ]


def test_snapshot_comparison_expands_embedded_assistant_streams() -> None:
    normalize = SMOKE["normalize_session_format_comparison"]
    expected = [
        {
            "type": "assistant/chunk",
            "seq": 4,
            "time": 0,
            "data": {"turn": 1, "step": 1, "chunk": {
                "type": "text-delta", "index": 0, "text": "done",
            }},
        },
        {
            "type": "assistant/message",
            "seq": 5,
            "time": 0,
            "data": {"turn": 1, "step": 1, "message": {"role": "assistant"}},
            "sourceEventSeqs": [4],
            "surfaceOp": "append",
        },
    ]
    actual = [{
        "type": "assistant/message",
        "seq": 4,
        "time": 0,
        "data": {
            "turn": 1,
            "step": 1,
            "message": {"role": "assistant"},
            "stream": [{
                "type": "text-chunks", "time0": 0, "index": 0, "dt": [], "texts": ["done"],
            }],
        },
        "surfaceOp": "append",
    }]

    assert normalize(actual, 2) == normalize(expected, 1)

    tool_result = {
        "type": "tool/result",
        "data": {"turn": 1, "step": 1},
        "sourceEventSeqs": [4],
    }
    assert normalize(tool_result, 1)["sourceEventSeqs"] == [4]
    assert normalize(tool_result, 2)["sourceEventSeqs"] == [4]


def test_snapshot_stream_expands_reasoning_and_tool_call_records() -> None:
    expand = SMOKE["expand_snapshot_stream_member"]

    assert expand({
        "type": "reasoning-chunks", "time0": 0, "index": 1,
        "dt": [], "texts": ["think"],
    }) == [{"type": "reasoning-delta", "index": 1, "text": "think"}]
    assert expand({
        "type": "tool-call-chunks", "time0": 0, "index": 2,
        "id": "call-1", "name": "read", "dt": [1], "args": ["{", "}"],
    }) == [
        {"type": "tool-call-delta", "index": 2, "id": "call-1", "name": "read", "argumentsDelta": "{"},
        {"type": "tool-call-delta", "index": 2, "id": "call-1", "name": "read", "argumentsDelta": "}"},
    ]


def test_snapshot_file_builder_order_is_checked_outside_update_mode(tmp_path: Path) -> None:
    compare = SMOKE["compare_snapshot_files"]

    with pytest.raises(AssertionError, match="snapshot builder produced"):
        compare({}, False, tmp_path, ("result.json",))


def test_snapshot_comparison_expands_sdk_wrapped_attempts() -> None:
    normalize = SMOKE["normalize_session_format_comparison"]
    actual = [{
        "method": "session.event",
        "payload": {
            "sessionId": "s",
            "event": {
                "type": "assistant/attempt",
                "seq": 7,
                "time": 0,
                "data": {
                    "turn": 1,
                    "step": 1,
                    "stream": [{"type": "chunk", "time": 0, "chunk": {"type": "finish"}}],
                },
            },
        },
    }]

    assert normalize(actual) == [{
        "method": "session.event",
        "payload": {
            "sessionId": "s",
            "event": {
                "type": "assistant/chunk",
                "data": {"turn": 1, "step": 1, "chunk": {"type": "finish"}},
            },
        },
    }]


def test_snapshot_generation_names_select_highest_role_without_double_counting(
    tmp_path: Path,
) -> None:
    render = SMOKE["snapshot_session_filename"]
    select = SMOKE["selected_snapshot_session_files"]
    assert render(0, 0) == "session.jsonl"
    assert render(0, 2) == "session.v2.jsonl"
    assert render(3, 0) == "session.3.jsonl"
    assert render(3, 2) == "session.3.v2.jsonl"

    (tmp_path / "session.jsonl").write_text(
        '{"type":"session","version":0}\n', encoding="utf-8",
    )
    (tmp_path / "session.v1.jsonl").write_text(
        '{"type":"session","version":1}\n', encoding="utf-8",
    )
    (tmp_path / "session.1.jsonl").write_text(
        '{"type":"session","version":0}\n', encoding="utf-8",
    )

    assert {index: path.name for index, path in select(tmp_path).items()} == {
        0: "session.v1.jsonl",
        1: "session.1.jsonl",
    }


def test_snapshot_generation_filename_must_match_header(tmp_path: Path) -> None:
    (tmp_path / "session.v1.jsonl").write_text(
        '{"type":"session","version":0}\n', encoding="utf-8",
    )

    with pytest.raises(AssertionError, match="filename declares Session format v1"):
        SMOKE["selected_snapshot_session_files"](tmp_path)


@pytest.mark.parametrize("returncode", [1, -1073741819, 3221225477])
def test_profile_plugin_failure_reports_native_exit_status(monkeypatch: pytest.MonkeyPatch, returncode: int) -> None:
    def failed_install(*args: object, **kwargs: object) -> subprocess.CompletedProcess[str]:
        return subprocess.CompletedProcess(args=[], returncode=returncode, stdout="", stderr="")

    monkeypatch.setattr(subprocess, "run", failed_install)
    with pytest.raises(AssertionError) as error:
        SMOKE["smoke_sdk_profile_plugin"]("http://127.0.0.1:1")
    message = str(error.value)
    assert f"returncode={returncode}" in message
    assert f"0x{returncode & 0xffffffff:08x}" in message
    assert "stdout='' stderr=''" in message