"""Tests for the SQLite review cache (stdlib sqlite3, temp DB per test)."""

from __future__ import annotations

import json
import sqlite3

import pytest

from app.store import ReviewStore

# The schema as it shipped before pr_created_at / pr_node_id were added.
_OLD_SCHEMA = """
CREATE TABLE reviews (
    owner TEXT NOT NULL, repo TEXT NOT NULL, number INTEGER NOT NULL,
    status TEXT NOT NULL, diff_hash TEXT, review_json TEXT, error TEXT,
    attempts INTEGER NOT NULL DEFAULT 0, pr_title TEXT, pr_author TEXT,
    pr_url TEXT, pr_updated_at TEXT, cached_at REAL NOT NULL, closed_at REAL,
    PRIMARY KEY (owner, repo, number)
);
"""


@pytest.fixture
def store(tmp_path) -> ReviewStore:
    return ReviewStore(str(tmp_path / "cache.db"))


def test_upsert_insert_then_get(store: ReviewStore) -> None:
    store.upsert(
        "o",
        "r",
        1,
        status="ready",
        diff_hash="abc",
        review_json=json.dumps({"summary": "hi"}),
        pr_title="Title",
        pr_author="octocat",
        pr_url="https://x/1",
        pr_updated_at="2026-01-01",
    )
    row = store.get("o", "r", 1)
    assert row is not None
    assert row["status"] == "ready"
    assert row["diff_hash"] == "abc"
    assert row["pr_title"] == "Title"
    assert json.loads(row["review_json"])["summary"] == "hi"
    assert row["cached_at"] > 0


def test_get_missing_returns_none(store: ReviewStore) -> None:
    assert store.get("o", "r", 999) is None


def test_update_preserves_unspecified_columns(store: ReviewStore) -> None:
    store.upsert("o", "r", 1, status="ready", diff_hash="h1", review_json="{}")
    # Update only status; diff_hash and review_json must survive.
    store.upsert("o", "r", 1, status="reviewing")
    row = store.get("o", "r", 1)
    assert row["status"] == "reviewing"
    assert row["diff_hash"] == "h1"
    assert row["review_json"] == "{}"


def test_unknown_column_raises(store: ReviewStore) -> None:
    with pytest.raises(ValueError, match="unknown review columns"):
        store.upsert("o", "r", 1, status="ready", bogus="x")


def test_list_orders_and_filters_closed(store: ReviewStore) -> None:
    store.upsert("o", "r", 1, status="ready", pr_updated_at="2026-01-01")
    store.upsert(
        "o", "r", 2, status="closed", pr_updated_at="2026-02-02", closed_at=1.0
    )
    all_rows = store.list()
    assert [r["number"] for r in all_rows] == [2, 1]  # updated_at desc
    open_rows = store.list(include_closed=False)
    assert [r["number"] for r in open_rows] == [1]


def test_reset_stale_reviewing(store: ReviewStore) -> None:
    store.upsert("o", "r", 1, status="reviewing")
    store.upsert("o", "r", 2, status="ready")
    n = store.reset_stale_reviewing()
    assert n == 1
    assert store.get("o", "r", 1)["status"] == "error"
    assert store.get("o", "r", 1)["error"] == "interrupted"
    assert store.get("o", "r", 2)["status"] == "ready"


def test_migration_adds_columns_to_old_schema(tmp_path) -> None:
    db = str(tmp_path / "old.db")
    con = sqlite3.connect(db)
    con.executescript(_OLD_SCHEMA)
    con.execute(
        "INSERT INTO reviews (owner, repo, number, status, cached_at) "
        "VALUES ('o', 'r', 1, 'ready', 1.0)"
    )
    con.commit()
    con.close()

    store = ReviewStore(db)  # __init__ migrates

    con = sqlite3.connect(db)
    cols = {row[1] for row in con.execute("PRAGMA table_info(reviews)")}
    con.close()
    assert "pr_created_at" in cols
    assert "pr_node_id" in cols

    # Existing row survived, and the new columns are writable.
    assert store.get("o", "r", 1)["status"] == "ready"
    store.upsert(
        "o", "r", 1, status="ready", pr_created_at="2026-06-01", pr_node_id="PR_x"
    )
    row = store.get("o", "r", 1)
    assert row["pr_created_at"] == "2026-06-01"
    assert row["pr_node_id"] == "PR_x"


def test_migration_is_idempotent(tmp_path) -> None:
    db = str(tmp_path / "c.db")
    ReviewStore(db)
    ReviewStore(db)  # second open must not fail on already-present columns
    con = sqlite3.connect(db)
    cols = {row[1] for row in con.execute("PRAGMA table_info(reviews)")}
    con.close()
    assert {"pr_created_at", "pr_node_id"} <= cols


def test_mark_missing_closed_and_purge(store: ReviewStore) -> None:
    store.upsert("o", "r", 1, status="ready")
    store.upsert("o", "r", 2, status="ready")
    # Only PR 1 is still live; PR 2 should be closed.
    store.mark_missing_closed({("o", "r", 1)})
    assert store.get("o", "r", 1)["status"] == "ready"
    closed = store.get("o", "r", 2)
    assert closed["status"] == "closed"
    assert closed["closed_at"] is not None

    # A long grace keeps it; a zero grace purges it.
    assert store.purge_closed(older_than_seconds=10_000) == 0
    assert store.get("o", "r", 2) is not None
    assert store.purge_closed(older_than_seconds=0) == 1
    assert store.get("o", "r", 2) is None