"""Integration (#5836): the MCP's backup tools against real Postgres.

The history Steward keeps in its settings, read back through list_backups;
make_backup refused with no bucket, then started (the run itself stubbed, as
in test_backup_job.py) and audited; the overview names a failing backup.
"""
from __future__ import annotations

import asyncio
import os
import uuid
from datetime import datetime, timedelta, timezone

import pytest

pytestmark = pytest.mark.integration


@pytest.fixture
def app():
    if not os.environ.get("STEWARD_DATABASE_URL"):
        pytest.skip("needs Postgres")
    from steward.app import create_app
    return create_app(testing=False)


async def _configure(app, **over):
    from steward.core.settings import set_setting
    values = {"backup.enabled": True, "backup.s3_endpoint": "http://user:pw@archives:8081",
              "backup.s3_bucket": "steward", "backup.s3_access_key": "AK",
              "backup.s3_secret_key": "SK", "backup.schedule_hour": 3, "backup.schedule_tz": "UTC",
              "backup.history": [], "backup.last_success_at": "", "backup.last_attempt_at": "", **over}
    async with app.db_sessionmaker() as db:
        async with db.begin():
            for k, v in values.items():
                await set_setting(db, k, v)


def test_backups_read_made_and_reported_through_mcp(app, monkeypatch):
    from sqlalchemy import select
    from steward.backup import job
    from steward.core.api_tokens import Caller
    from steward.mcp import _context
    from steward.mcp.tools import backups, overview
    from steward.models.audit import AuditEvent
    from steward.models.users import User, UserRole

    tag = uuid.uuid4().hex[:8]
    now = datetime.now(timezone.utc)
    good_at, failed_at = now - timedelta(days=1), now - timedelta(minutes=10)
    history = [
        {"at": failed_at.isoformat(), "ok": False, "by": "schedule", "name": "", "size": 0,
         "secs": 1.0, "error": "Upload of steward-x.tar refused: 503"},
        {"at": good_at.isoformat(), "ok": True, "by": f"bk-{tag}", "name": "steward-20261014T030000Z.tar",
         "size": 52000, "secs": 4.2, "error": "",
         "check": {"ok": True, "changes": 0, "rows": 310, "summary": "Matches what is in place."}},
    ]
    made = []

    async def _fake_run(app_, by="schedule", user_id=None):
        made.append((by, user_id))
        return {}

    monkeypatch.setattr(job, "run_backup", _fake_run)

    async def _go():
        async with app.db_sessionmaker() as s:
            async with s.begin():
                user = User(username=f"bk-{tag}", email=f"bk-{tag}@test", password_hash="x",
                            role=UserRole.admin)
                s.add(user)
                await s.flush()
                user_id = user.id
        _context._app_ctx.set(app)
        _context._caller_ctx.set(Caller(user_id=user_id, username=f"bk-{tag}",
                                        role=UserRole.admin, token_id=9))

        await _configure(app, **{"backup.s3_bucket": ""})
        with pytest.raises(ValueError, match="bucket isn't set up.*Nothing was started"):
            await backups.make_backup()

        await _configure(app, **{"backup.history": history,
                                 "backup.last_success_at": good_at.isoformat(),
                                 "backup.last_attempt_at": failed_at.isoformat()})
        listed = await backups.list_backups()
        assert listed["enabled"] is True and listed["running"] is False
        assert listed["bucket"] == {"endpoint": "http://user:***@archives:8081", "bucket": "steward",
                                    "region": "us-east-1"}
        assert listed["verdict"]["tone"] == "bad" and "503" in listed["verdict"]["error"]
        assert listed["schedule"]["next_at"] is not None
        failed, good = listed["runs"]
        assert failed["ok"] is False and failed["by"] == "schedule" and failed["name"] is None
        assert good["name"] == "steward-20261014T030000Z.tar" and good["size_bytes"] == 52000
        assert good["check"]["rows"] == 310 and listed["last_success_age_s"] >= 86000
        assert (await backups.list_backups(limit=1))["truncated"] is True

        started = await backups.make_backup()
        assert started["started"] is True
        await asyncio.sleep(0)          # the background task runs the stub
        assert made == [(f"bk-{tag} via MCP", user_id)]

        async with app.db_sessionmaker() as s:
            rows = list((await s.execute(select(AuditEvent).where(
                AuditEvent.user_id == user_id, AuditEvent.action == "backup.started"))).scalars())
        assert len(rows) == 1 and rows[0].username == f"bk-{tag} via MCP"

        ov = await overview.get_overview()
        mine = [f for f in ov["findings"] if f["kind"] == "backup_failed"]
        assert len(mine) == 1 and "refused: 503" in mine[0]["summary"]

        await _configure(app, **{"backup.enabled": False})

    asyncio.run(_go())