"""Tests for ban_service.list_bans()."""

from __future__ import annotations

import json
import time
from pathlib import Path
from typing import Any
from unittest.mock import AsyncMock, patch

import aiosqlite
import pytest

from app.services import ban_service

# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------

_NOW: int = int(time.time())
_ONE_HOUR_AGO: int = _NOW - 3600
_TWO_DAYS_AGO: int = _NOW - 2 * 24 * 3600


async def _create_f2b_db(path: str, rows: list[dict[str, Any]]) -> None:
    """Create a minimal fail2ban SQLite database with the given ban rows.

    Args:
        path: Filesystem path for the new SQLite file.
        rows: Sequence of dicts with keys ``jail``, ``ip``, ``timeofban``,
            ``bantime``, ``bancount``, and optionally ``data``.
    """
    async with aiosqlite.connect(path) as db:
        await db.execute(
            "CREATE TABLE jails ("
            "name TEXT NOT NULL UNIQUE, "
            "enabled INTEGER NOT NULL DEFAULT 1"
            ")"
        )
        await db.execute(
            "CREATE TABLE bans ("
            "jail TEXT NOT NULL, "
            "ip TEXT, "
            "timeofban INTEGER NOT NULL, "
            "bantime INTEGER NOT NULL, "
            "bancount INTEGER NOT NULL DEFAULT 1, "
            "data JSON"
            ")"
        )
        for row in rows:
            await db.execute(
                "INSERT INTO bans (jail, ip, timeofban, bantime, bancount, data) "
                "VALUES (?, ?, ?, ?, ?, ?)",
                (
                    row["jail"],
                    row["ip"],
                    row["timeofban"],
                    row.get("bantime", 3600),
                    row.get("bancount", 1),
                    json.dumps(row["data"]) if "data" in row else None,
                ),
            )
        await db.commit()


@pytest.fixture
async def f2b_db_path(tmp_path: Path) -> str:  # type: ignore[misc]
    """Return the path to a test fail2ban SQLite database with several bans."""
    path = str(tmp_path / "fail2ban_test.sqlite3")
    await _create_f2b_db(
        path,
        [
            {
                "jail": "sshd",
                "ip": "1.2.3.4",
                "timeofban": _ONE_HOUR_AGO,
                "bantime": 3600,
                "bancount": 2,
                "data": {
                    "matches": ["Nov 10 10:00 sshd[123]: Failed password for root"],
                    "failures": 5,
                },
            },
            {
                "jail": "nginx",
                "ip": "5.6.7.8",
                "timeofban": _ONE_HOUR_AGO,
                "bantime": 7200,
                "bancount": 1,
                "data": {"matches": ["GET /admin HTTP/1.1"], "failures": 3},
            },
            {
                "jail": "sshd",
                "ip": "9.10.11.12",
                "timeofban": _TWO_DAYS_AGO,
                "bantime": 3600,
                "bancount": 1,
                "data": {"failures": 6},  # no matches
            },
        ],
    )
    return path


@pytest.fixture
async def empty_f2b_db_path(tmp_path: Path) -> str:  # type: ignore[misc]
    """Return the path to a fail2ban SQLite database with no ban records."""
    path = str(tmp_path / "fail2ban_empty.sqlite3")
    await _create_f2b_db(path, [])
    return path


# ---------------------------------------------------------------------------
# list_bans — happy path
# ---------------------------------------------------------------------------


class TestListBansHappyPath:
    """Verify ban_service.list_bans() under normal conditions."""

    async def test_returns_bans_in_range(self, f2b_db_path: str) -> None:
        """Only bans within the selected range are returned."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "24h")

        # Two bans within last 24 h; one is 2 days old and excluded.
        assert result.total == 2
        assert len(result.items) == 2

    async def test_results_sorted_newest_first(self, f2b_db_path: str) -> None:
        """Items are ordered by ``banned_at`` descending (newest first)."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "24h")

        timestamps = [item.banned_at for item in result.items]
        assert timestamps == sorted(timestamps, reverse=True)

    async def test_ban_fields_present(self, f2b_db_path: str) -> None:
        """Each item contains ip, jail, banned_at, ban_count."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "24h")

        for item in result.items:
            assert item.ip
            assert item.jail
            assert item.banned_at
            assert item.ban_count >= 1

    async def test_service_extracted_from_first_match(self, f2b_db_path: str) -> None:
        """``service`` field is the first element of ``data.matches``."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "24h")

        sshd_item = next(i for i in result.items if i.jail == "sshd")
        assert sshd_item.service is not None
        assert "Failed password" in sshd_item.service

    async def test_service_is_none_when_no_matches(self, f2b_db_path: str) -> None:
        """``service`` is ``None`` when the ban has no stored matches."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            # Use 7d to include the older ban with no matches.
            result = await ban_service.list_bans("/fake/sock", "7d")

        no_match = next(i for i in result.items if i.ip == "9.10.11.12")
        assert no_match.service is None

    async def test_empty_db_returns_zero(self, empty_f2b_db_path: str) -> None:
        """When no bans exist the result has total=0 and no items."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=empty_f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "24h")

        assert result.total == 0
        assert result.items == []

    async def test_365d_range_includes_old_bans(self, f2b_db_path: str) -> None:
        """The ``365d`` range includes bans that are 2 days old."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "365d")

        assert result.total == 3


# ---------------------------------------------------------------------------
# list_bans — geo enrichment
# ---------------------------------------------------------------------------


class TestListBansGeoEnrichment:
    """Verify geo enrichment integration in ban_service.list_bans()."""

    async def test_geo_data_applied_when_enricher_provided(
        self, f2b_db_path: str
    ) -> None:
        """Geo fields are populated when an enricher returns data."""
        from app.services.geo_service import GeoInfo

        async def fake_enricher(ip: str) -> GeoInfo:
            return GeoInfo(
                country_code="DE",
                country_name="Germany",
                asn="AS3320",
                org="Deutsche Telekom",
            )

        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans(
                "/fake/sock", "24h", geo_enricher=fake_enricher
            )

        for item in result.items:
            assert item.country_code == "DE"
            assert item.country_name == "Germany"
            assert item.asn == "AS3320"

    async def test_geo_failure_does_not_break_results(
        self, f2b_db_path: str
    ) -> None:
        """A geo enricher that raises still returns ban items (geo fields null)."""

        async def failing_enricher(ip: str) -> None:
            raise RuntimeError("geo service down")

        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans(
                "/fake/sock", "24h", geo_enricher=failing_enricher
            )

        assert result.total == 2
        for item in result.items:
            assert item.country_code is None


# ---------------------------------------------------------------------------
# list_bans — pagination
# ---------------------------------------------------------------------------


class TestListBansPagination:
    """Verify pagination parameters in list_bans()."""

    async def test_page_size_respected(self, f2b_db_path: str) -> None:
        """``page_size=1`` returns at most one item."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "7d", page_size=1)

        assert len(result.items) == 1
        assert result.page_size == 1

    async def test_page_2_returns_remaining_items(self, f2b_db_path: str) -> None:
        """The second page returns items not on the first page."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            page1 = await ban_service.list_bans("/fake/sock", "7d", page=1, page_size=1)
            page2 = await ban_service.list_bans("/fake/sock", "7d", page=2, page_size=1)

        # Different IPs should appear on different pages.
        assert page1.items[0].ip != page2.items[0].ip

    async def test_total_reflects_full_count_not_page_count(
        self, f2b_db_path: str
    ) -> None:
        """``total`` reports all matching records regardless of pagination."""
        with patch(
            "app.services.ban_service._get_fail2ban_db_path",
            new=AsyncMock(return_value=f2b_db_path),
        ):
            result = await ban_service.list_bans("/fake/sock", "7d", page_size=1)

        assert result.total == 3  # All three bans are within 7d.