from __future__ import annotations
import os, sys, sqlite3
from pathlib import Path
import pytest

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from sfm.database import SeismoDb

ZC_COLS = ["tran_zc_freq", "vert_zc_freq", "long_zc_freq", "mic_zc_freq",
           "tran_zc_above_range", "vert_zc_above_range",
           "long_zc_above_range", "mic_zc_above_range"]


def test_fresh_db_has_zc_freq_columns(tmp_path: Path):
    db = SeismoDb(tmp_path / "seismo_relay.db")
    with sqlite3.connect(str(tmp_path / "seismo_relay.db")) as conn:
        cols = {r[1] for r in conn.execute("PRAGMA table_info(events)").fetchall()}
    for c in ZC_COLS:
        assert c in cols, f"missing column {c}"


def test_migration_adds_zc_freq_columns_to_legacy_db(tmp_path: Path):
    db_path = tmp_path / "old.db"
    # A "modern-minus-zc" events table (has blastware_* but not the zc columns).
    with sqlite3.connect(str(db_path)) as conn:
        conn.executescript("""
            CREATE TABLE events (
                id TEXT PRIMARY KEY, serial TEXT NOT NULL, waveform_key TEXT NOT NULL,
                session_id TEXT, timestamp TEXT,
                tran_ppv REAL, vert_ppv REAL, long_ppv REAL, peak_vector_sum REAL, mic_ppv REAL,
                project TEXT, client TEXT, operator TEXT, sensor_location TEXT,
                sample_rate INTEGER, record_type TEXT,
                false_trigger INTEGER NOT NULL DEFAULT 0,
                created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
                UNIQUE(serial, timestamp)
            );
            INSERT INTO events (id, serial, waveform_key, timestamp)
              VALUES ('legacy-id', 'BE11529', '01110000', '2026-04-01T12:00:00');
        """)
    db = SeismoDb(db_path)              # triggers _migrate
    rows = db.query_events(serial="BE11529")
    assert len(rows) == 1
    for c in ZC_COLS:
        assert c in rows[0]            # present
        assert rows[0][c] is None      # NULL for the legacy row