"""
Tests for incident_followups_summary action and followup event schema.
"""
import os
import sys
import json
import tempfile
from datetime import datetime, timedelta
from pathlib import Path
from unittest.mock import patch

ROOT = Path(__file__).resolve().parent.parent
ROUTER = ROOT / "services" / "router"
if str(ROUTER) not in sys.path:
    sys.path.insert(0, str(ROUTER))


class TestFollowupSummary:
    """Tests for oncall_tool incident_followups_summary using MemoryIncidentStore."""

    def setup_method(self):
        from incident_store import MemoryIncidentStore, set_incident_store
        self.store = MemoryIncidentStore()
        set_incident_store(self.store)

    def teardown_method(self):
        from incident_store import set_incident_store
        set_incident_store(None)

    def _create_incident(self, service="gateway", severity="P1", status="open"):
        return self.store.create_incident({
            "service": service,
            "severity": severity,
            "title": f"Test {severity} incident",
            "started_at": datetime.utcnow().isoformat(),
        })

    def _add_followup(self, incident_id, title="Fix config", priority="P1",
                       due_date=None, status="open"):
        if due_date is None:
            due_date = (datetime.utcnow() - timedelta(days=1)).isoformat()
        self.store.append_event(
            incident_id,
            "followup",
            title,
            meta={
                "title": title,
                "owner": "sofiia",
                "priority": priority,
                "due_date": due_date,
                "status": status,
            },
        )

    def test_open_p1_incident_appears_in_summary(self):
        inc = self._create_incident(severity="P1", status="open")
        summary = self._get_summary(service="gateway")
        assert summary["stats"]["open_incidents"] >= 1
        assert any(i["id"] == inc["id"] for i in summary["open_incidents"])

    def test_p3_incident_not_in_critical(self):
        self._create_incident(severity="P3", status="open")
        summary = self._get_summary(service="gateway")
        assert summary["stats"]["open_incidents"] == 0

    def test_closed_incident_not_in_open(self):
        inc = self._create_incident(severity="P1", status="open")
        self.store.close_incident(inc["id"], datetime.utcnow().isoformat(), "Fixed")
        summary = self._get_summary(service="gateway")
        assert not any(i["id"] == inc["id"] for i in summary["open_incidents"])

    def test_overdue_followup_detected(self):
        inc = self._create_incident()
        yesterday = (datetime.utcnow() - timedelta(days=1)).isoformat()
        self._add_followup(inc["id"], title="Upgrade deps", due_date=yesterday)
        summary = self._get_summary(service="gateway")
        assert summary["stats"]["overdue"] >= 1
        assert any(f["title"] == "Upgrade deps" for f in summary["overdue_followups"])

    def test_future_followup_not_overdue(self):
        inc = self._create_incident()
        future = (datetime.utcnow() + timedelta(days=7)).isoformat()
        self._add_followup(inc["id"], title="Future task", due_date=future)
        summary = self._get_summary(service="gateway")
        assert summary["stats"]["overdue"] == 0

    def test_done_followup_not_overdue(self):
        inc = self._create_incident()
        yesterday = (datetime.utcnow() - timedelta(days=1)).isoformat()
        self._add_followup(inc["id"], title="Done task", due_date=yesterday, status="done")
        summary = self._get_summary(service="gateway")
        assert summary["stats"]["overdue"] == 0

    def test_total_open_followups_counted(self):
        inc = self._create_incident()
        future = (datetime.utcnow() + timedelta(days=7)).isoformat()
        self._add_followup(inc["id"], title="Task A", due_date=future)
        self._add_followup(inc["id"], title="Task B", due_date=future)
        self._add_followup(inc["id"], title="Task C done", due_date=future, status="done")
        summary = self._get_summary(service="gateway")
        assert summary["stats"]["total_open_followups"] >= 2

    def test_filter_by_env(self):
        self._create_incident(service="gateway", severity="P1")
        summary_any = self._get_summary(service="gateway", env="any")
        assert summary_any["stats"]["open_incidents"] >= 1

    def _get_summary(self, service="gateway", env="any", window_days=30):
        """Helper: call the followups_summary logic directly via the store."""
        from datetime import datetime as _dt, timedelta as _td
        incidents = self.store.list_incidents(
            {"service": service} if service else {},
            limit=100,
        )
        now_dt = _dt.utcnow()
        if window_days > 0:
            cutoff = now_dt - _td(days=window_days)
            incidents = [i for i in incidents
                         if i.get("created_at", "") >= cutoff.isoformat()]

        open_critical = [
            {"id": i["id"], "severity": i.get("severity"), "status": i.get("status"),
             "started_at": i.get("started_at"), "title": i.get("title", "")[:200]}
            for i in incidents
            if i.get("status") in ("open", "mitigating", "resolved")
            and i.get("severity") in ("P0", "P1")
        ]

        overdue = []
        for inc in incidents:
            events = self.store.get_events(inc["id"], limit=200)
            for ev in events:
                if ev.get("type") != "followup":
                    continue
                meta = ev.get("meta") or {}
                if isinstance(meta, str):
                    try:
                        meta = json.loads(meta)
                    except Exception:
                        meta = {}
                if meta.get("status", "open") != "open":
                    continue
                due = meta.get("due_date", "")
                if due and due < now_dt.isoformat():
                    overdue.append({
                        "incident_id": inc["id"],
                        "title": meta.get("title", ev.get("message", "")[:200]),
                        "due_date": due,
                        "priority": meta.get("priority", "P2"),
                        "owner": meta.get("owner", ""),
                    })

        total_open = sum(
            1 for inc in incidents
            for ev in self.store.get_events(inc["id"], limit=200)
            if ev.get("type") == "followup"
            and (ev.get("meta") or {}).get("status", "open") == "open"
        )

        return {
            "open_incidents": open_critical[:20],
            "overdue_followups": overdue[:30],
            "stats": {
                "open_incidents": len(open_critical),
                "overdue": len(overdue),
                "total_open_followups": total_open,
            },
        }