"""Completion-manifest guard for research.sqlite breadth runs."""

from __future__ import annotations

import sys
from pathlib import Path

import pytest
from sqlalchemy import create_engine, text

ROOT = Path(__file__).resolve().parents[2]
SCRIPTS = ROOT / "scripts"
if str(SCRIPTS) not in sys.path:
    sys.path.insert(0, str(SCRIPTS))

from research_snapshot_manifest import (  # noqa: E402
    assert_research_snapshot_complete,
    clear_manifest,
    load_manifest,
    manifest_path_for,
    write_completion_manifest,
)


def _tiny_research_db(path: Path, *, tickers: int = 3, bars_each: int = 5) -> None:
    engine = create_engine(f"sqlite:///{path.resolve().as_posix()}", future=True)
    with engine.begin() as conn:
        conn.execute(
            text(
                "CREATE TABLE tickers ("
                "id INTEGER PRIMARY KEY, symbol TEXT NOT NULL UNIQUE, "
                "name TEXT, created_at TEXT)"
            )
        )
        conn.execute(
            text(
                "CREATE TABLE ohlcv_records ("
                "id INTEGER PRIMARY KEY, ticker_id INTEGER, date TEXT, "
                "open REAL, high REAL, low REAL, close REAL, volume INTEGER, "
                "created_at TEXT)"
            )
        )
        conn.execute(
            text(
                "CREATE TABLE research_rank_only ("
                "ticker_id INTEGER PRIMARY KEY, symbol TEXT NOT NULL UNIQUE)"
            )
        )
        for i in range(tickers):
            sym = f"T{i}"
            conn.execute(
                text(
                    "INSERT INTO tickers (id, symbol, name, created_at) "
                    "VALUES (:id, :sym, NULL, '2026-01-01')"
                ),
                {"id": i + 1, "sym": sym},
            )
            if i > 0:
                conn.execute(
                    text(
                        "INSERT INTO research_rank_only (ticker_id, symbol) "
                        "VALUES (:id, :sym)"
                    ),
                    {"id": i + 1, "sym": sym},
                )
            for d in range(bars_each):
                conn.execute(
                    text(
                        "INSERT INTO ohlcv_records "
                        "(ticker_id, date, open, high, low, close, volume, created_at) "
                        "VALUES (:tid, :date, 1,1,1,1,100, '2026-01-01')"
                    ),
                    {"tid": i + 1, "date": f"2026-01-{d+1:02d}"},
                )
    engine.dispose()


def test_write_and_assert_complete(tmp_path: Path) -> None:
    snap = tmp_path / "research.sqlite"
    _tiny_research_db(snap)
    path = write_completion_manifest(snap, complete=True, sources={"t": "unit"})
    assert path == manifest_path_for(snap)
    assert path.exists()

    m = assert_research_snapshot_complete(snap)
    assert m["complete"] is True
    assert m["ticker_count"] == 3
    assert m["ohlcv_row_count"] == 15
    assert m["rank_only_count"] == 2
    assert m["live_counts"]["ticker_count"] == 3


def test_refuse_missing_manifest(tmp_path: Path) -> None:
    snap = tmp_path / "research.sqlite"
    _tiny_research_db(snap)
    with pytest.raises(SystemExit, match="manifest missing"):
        assert_research_snapshot_complete(snap)


def test_refuse_incomplete_flag(tmp_path: Path) -> None:
    snap = tmp_path / "research.sqlite"
    _tiny_research_db(snap)
    write_completion_manifest(snap, complete=False, limit=50)
    with pytest.raises(SystemExit, match="marked incomplete"):
        assert_research_snapshot_complete(snap)


def test_refuse_count_mismatch(tmp_path: Path) -> None:
    snap = tmp_path / "research.sqlite"
    _tiny_research_db(snap)
    write_completion_manifest(snap, complete=True)
    # Tamper: change live DB after manifest written
    engine = create_engine(f"sqlite:///{snap.resolve().as_posix()}", future=True)
    with engine.begin() as conn:
        conn.execute(
            text(
                "INSERT INTO tickers (id, symbol, name, created_at) "
                "VALUES (99, 'EXTRA', NULL, '2026-01-01')"
            )
        )
    engine.dispose()
    with pytest.raises(SystemExit, match="does not match"):
        assert_research_snapshot_complete(snap)


def test_clear_manifest(tmp_path: Path) -> None:
    snap = tmp_path / "research.sqlite"
    _tiny_research_db(snap)
    write_completion_manifest(snap, complete=True)
    assert load_manifest(snap) is not None
    clear_manifest(snap)
    assert load_manifest(snap) is None