"""
Regression tests for State Hub MCP write tools.

These call the registered FastMCP tools in-process and monkeypatch only the
thin HTTP helpers. That exercises FastMCP argument validation and the MCP
wrapper logic without depending on a running State Hub API.
"""
from __future__ import annotations

import json
from typing import Any

import mcp_server.server as server


async def _call_tool(name: str, arguments: dict[str, Any]) -> dict[str, Any]:
    result = await server.mcp.call_tool(name, arguments)
    return json.loads(result.content[0].text)


class TestMCPWriteTools:
    async def test_create_workstream_returns_rest_shape_and_emits_progress(self, monkeypatch):
        calls: list[tuple[str, dict[str, Any]]] = []

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            calls.append((path, body))
            if path == "/workstreams":
                return {
                    "id": "ws-1",
                    "topic_id": body["topic_id"],
                    "title": body["title"],
                    "slug": body["slug"],
                    "status": body["status"],
                }
            if path == "/progress":
                return {"id": "event-1", **body}
            raise AssertionError(f"unexpected POST {path}")

        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "create_workstream",
            {"topic_id": "topic-1", "title": "MCP Reliable Write"},
        )

        assert body == {
            "id": "ws-1",
            "topic_id": "topic-1",
            "title": "MCP Reliable Write",
            "slug": "mcp-reliable-write",
            "status": "active",
        }
        assert [path for path, _ in calls] == ["/workstreams", "/progress"]
        assert calls[1][1]["workstream_id"] == "ws-1"
        assert calls[1][1]["event_type"] == "workstream_created"

    async def test_create_task_returns_rest_shape_and_emits_progress(self, monkeypatch):
        calls: list[tuple[str, dict[str, Any]]] = []

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            calls.append((path, body))
            if path == "/tasks":
                return {
                    "id": "task-1",
                    "workstream_id": body["workstream_id"],
                    "title": body["title"],
                    "priority": body["priority"],
                    "status": "todo",
                }
            if path == "/progress":
                return {"id": "event-1", **body}
            raise AssertionError(f"unexpected POST {path}")

        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "create_task",
            {"workstream_id": "ws-1", "title": "MCP task", "priority": "high"},
        )

        assert body == {
            "id": "task-1",
            "workstream_id": "ws-1",
            "title": "MCP task",
            "priority": "high",
            "status": "todo",
        }
        assert [path for path, _ in calls] == ["/tasks", "/progress"]
        assert calls[1][1]["task_id"] == "task-1"
        assert calls[1][1]["event_type"] == "task_created"

    async def test_update_task_status_api_error_is_clear_and_skips_progress(self, monkeypatch):
        post_calls: list[tuple[str, dict[str, Any]]] = []

        def fake_patch(path: str, body: dict[str, Any]) -> dict[str, Any]:
            assert path == "/tasks/task-1"
            assert body["status"] == "done"
            return {"error": "API 404: task not found"}

        monkeypatch.setattr(server, "_patch", fake_patch)
        monkeypatch.setattr(server, "_post", lambda path, body: post_calls.append((path, body)))

        body = await _call_tool(
            "update_task_status",
            {"task_id": "task-1", "status": "done"},
        )

        assert body["tool"] == "update_task_status"
        assert body["error"] == "API 404: task not found"
        assert post_calls == []

    async def test_update_task_status_returns_rest_shape_and_emits_progress(self, monkeypatch):
        post_calls: list[tuple[str, dict[str, Any]]] = []

        def fake_patch(path: str, body: dict[str, Any]) -> dict[str, Any]:
            assert path == "/tasks/task-1"
            assert body["status"] == "done"
            return {
                "id": "task-1",
                "workstream_id": "ws-1",
                "title": "Finish MCP reliability",
                "status": "done",
            }

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            post_calls.append((path, body))
            return {"id": "event-1", **body}

        monkeypatch.setattr(server, "_patch", fake_patch)
        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "update_task_status",
            {"task_id": "task-1", "status": "done"},
        )

        assert body == {
            "id": "task-1",
            "workstream_id": "ws-1",
            "title": "Finish MCP reliability",
            "status": "done",
        }
        assert [path for path, _ in post_calls] == ["/progress"]
        assert post_calls[0][1]["task_id"] == "task-1"
        assert post_calls[0][1]["event_type"] == "task_status_changed"

    async def test_add_progress_event_accepts_json_string_detail(self, monkeypatch):
        calls: list[tuple[str, dict[str, Any]]] = []

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            calls.append((path, body))
            return {"id": "event-1", **body}

        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "add_progress_event",
            {
                "summary": "MCP progress",
                "event_type": "note",
                "workstream_id": "ws-1",
                "detail": '{"files_changed": 3}',
            },
        )

        assert body["id"] == "event-1"
        assert body["detail"] == {"files_changed": 3}
        assert calls == [
            (
                "/progress",
                {
                    "topic_id": None,
                    "workstream_id": "ws-1",
                    "task_id": None,
                    "event_type": "note",
                    "summary": "MCP progress",
                    "author": "custodian",
                    "detail": {"files_changed": 3},
                },
            )
        ]

    async def test_bulk_update_task_statuses_returns_rest_shape(self, monkeypatch):
        calls: list[tuple[str, dict[str, Any]]] = []

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            calls.append((path, body))
            assert path == "/tasks/bulk-status-sync"
            return {
                "updated": [
                    {"id": "task-1", "title": "First", "status": "done"},
                    {"id": "task-2", "title": "Second", "status": "wait"},
                ],
                "progress_event_ids": ["event-1", "event-2"],
            }

        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "bulk_update_task_statuses",
            {
                "author": "codex",
                "session_id": "session-1",
                "updates": [
                    {"task_id": "task-1", "status": "done"},
                    {"task_id": "task-2", "status": "wait", "blocking_reason": "needs input"},
                ],
            },
        )

        assert body["progress_event_ids"] == ["event-1", "event-2"]
        assert [task["status"] for task in body["updated"]] == ["done", "wait"]
        assert calls == [
            (
                "/tasks/bulk-status-sync",
                {
                    "updates": [
                        {"task_id": "task-1", "status": "done"},
                        {"task_id": "task-2", "status": "wait", "blocking_reason": "needs input"},
                    ],
                    "author": "codex",
                    "session_id": "session-1",
                },
            )
        ]

    async def test_record_decision_returns_rest_shape_and_emits_progress(self, monkeypatch):
        calls: list[tuple[str, dict[str, Any]]] = []

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            calls.append((path, body))
            if path == "/decisions":
                return {
                    "id": "decision-1",
                    "title": body["title"],
                    "decision_type": body["decision_type"],
                    "topic_id": body["topic_id"],
                    "workstream_id": body["workstream_id"],
                    "status": "open",
                    "escalation_note": None,
                }
            if path == "/progress":
                return {"id": "event-1", **body}
            raise AssertionError(f"unexpected POST {path}")

        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "record_decision",
            {
                "title": "Keep MCP stateless",
                "decision_type": "made",
                "topic_id": "topic-1",
                "workstream_id": "ws-1",
            },
        )

        assert body["id"] == "decision-1"
        assert body["title"] == "Keep MCP stateless"
        assert [path for path, _ in calls] == ["/decisions", "/progress"]
        assert calls[1][1]["decision_id"] == "decision-1"
        assert calls[1][1]["event_type"] == "decision_recorded"

    async def test_create_workstream_api_error_skips_progress(self, monkeypatch):
        calls: list[tuple[str, dict[str, Any]]] = []

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            calls.append((path, body))
            return {"error": "API 422: invalid topic"}

        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "create_workstream",
            {"topic_id": "bad-topic", "title": "No progress on failure"},
        )

        assert body["tool"] == "create_workstream"
        assert body["error"] == "API 422: invalid topic"
        assert [path for path, _ in calls] == ["/workstreams"]

    async def test_record_decision_missing_id_is_clear_and_skips_progress(self, monkeypatch):
        calls: list[tuple[str, dict[str, Any]]] = []

        def fake_post(path: str, body: dict[str, Any]) -> dict[str, Any]:
            calls.append((path, body))
            return {"title": body["title"], "status": "open"}

        monkeypatch.setattr(server, "_post", fake_post)

        body = await _call_tool(
            "record_decision",
            {"title": "Malformed API response", "topic_id": "topic-1"},
        )

        assert body["tool"] == "record_decision"
        assert body["error"] == "API response missing required field(s): id"
        assert [path for path, _ in calls] == ["/decisions"]