import 'package:drift/drift.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import 'connection/unsupported.dart'
    if (dart.library.ffi) 'connection/native.dart'
    if (dart.library.js_interop) 'connection/web.dart';

part 'app_database.g.dart';

/// Immutable log of GLP-1 injections and scheduled doses.
///
/// [injectionSite] stores the anatomical rotation quadrant as a stable string
/// value (the `InjectionQuadrant.name` identifier of the medication domain
/// enum) so the persistence schema stays decoupled from domain types and the
/// `core` layer never imports feature code.
@DataClassName('MedicationDoseRecord')
class MedicationDosesTable extends Table {
  IntColumn get id => integer().autoIncrement()();

  /// Commercial or compounded name of the GLP-1/GIP agonist (e.g. Tirzepatide).
  TextColumn get compoundName => text().withLength(min: 1, max: 128)();

  /// Total injected quantity in milligrams.
  RealColumn get doseMg => real()();

  /// When the dose was prescribed to be taken (titration schedule anchor).
  DateTimeColumn get scheduledTime => dateTime()();

  /// When the dose was actually administered; `null` while still pending.
  DateTimeColumn get administeredTime => dateTime().nullable()();

  /// Rotation quadrant identifier (e.g. `abdomenLeftLower`).
  TextColumn get injectionSite => text().nullable()();

  TextColumn get notes => text().nullable()();
}

/// Root drift database for the GLP-1 Companion.
///
/// On native platforms the connection is backed by SQLCipher: the 256-bit AES
/// master key provisioned by `CryptoManager` is applied via `PRAGMA key`
/// immediately after the database opens (see `connection/native.dart`). Web
/// builds transparently fall back to a WASM SQLite database, since SQLCipher
/// cannot run inside the browser.
@DriftDatabase(tables: [MedicationDosesTable])
class AppDatabase extends _$AppDatabase {
  /// Opens the platform-appropriate (encrypted on native) database connection.
  AppDatabase() : super(openDatabaseConnection());

  /// Injects a custom executor; used by unit tests with an in-memory database.
  AppDatabase.forTesting(super.executor);

  @override
  int get schemaVersion => 1;
}

/// Application-wide database instance; closed when the container is disposed.
final appDatabaseProvider = Provider<AppDatabase>((ref) {
  final database = AppDatabase();
  ref.onDispose(database.close);
  return database;
});