"""Regression coverage for SQLite initialization from production DDL."""

import json
import sqlite3

import pytest


def test_schema_initialization_and_power_meter_json(sqlite_schema):
    with sqlite3.connect(":memory:") as database:
        database.executescript(sqlite_schema)
        database.executescript(sqlite_schema)
        tables = {
            row[0] for row in database.execute("SELECT name FROM sqlite_master WHERE type='table'")
        }
        assert {
            "material_consumption_snapshots",
            "material_efficiency_snapshots",
            "material_application_snapshots",
            "channel_material_consumption_snapshots",
            "production_downtime_events",
            "production_order_attribution_state",
            "power_meter_readings",
            "power_meter_monthly_reports",
        } <= tables

        insert = """INSERT INTO power_meter_readings
            (meter, timestamp, energy_total_kwh, energy_delta_kwh,
             active_power_total_kw, grid_frequency_hz)
            VALUES (?, ?, 100, 1, 4, 50)"""
        database.execute(insert, ("B2", "2026-09-01T00:00:00Z"))
        phases = {"L1": 1.25, "L2": 2.75}
        database.execute(insert, ("B2", "2026-09-01T00:01:00Z"))
        database.execute(
            "UPDATE power_meter_readings SET phase_active_power_kw=? WHERE timestamp=?",
            (json.dumps(phases), "2026-09-01T00:01:00Z"),
        )
        rows = database.execute(
            "SELECT phase_active_power_kw FROM power_meter_readings ORDER BY timestamp"
        ).fetchall()
        assert [json.loads(row[0]) for row in rows] == [{}, phases]
        with pytest.raises(sqlite3.IntegrityError):
            database.execute(insert, ("B2", "2026-09-01T00:00:00Z"))

        summary = {"consumption_kwh": 42.5, "first_timestamp": None, "outages": 0}
        database.execute(
            """INSERT INTO power_meter_monthly_reports (meter, month, report_path, summary)
               VALUES (?, ?, ?, ?)""",
            ("B2", "2026-09", "/reports/B2.pdf", json.dumps(summary)),
        )
        path, stored_summary, generated_at = database.execute(
            "SELECT report_path, summary, generated_at FROM power_meter_monthly_reports"
        ).fetchone()
        assert path == "/reports/B2.pdf"
        assert json.loads(stored_summary) == summary
        assert generated_at is not None
        with pytest.raises(sqlite3.IntegrityError):
            database.execute(
                """INSERT INTO power_meter_monthly_reports (meter, month, report_path, summary)
                   VALUES ('B2', '2026-10', '/reports/B2.pdf', NULL)"""
            )