// @ts-nocheck
/**
 * metona-sqlark Vue Integration (v0.2.5)
 * @module integrations/vue
 *
 * 轻量 Vue composables，需要 vue 作为 peer dependency。
 *
 * @example
 * import { useSqlarkQuery, useSqlarkTable } from 'metona-sqlark/vue';
 * import { db } from './db';
 *
 * const { data, loading, refresh } = useSqlarkQuery(db, 'SELECT * FROM users');
 */

import { MetonaSqlark } from '../core';
import { ref, watch, onMounted, onUnmounted, type Ref } from 'vue';

/** useSqlarkQuery: 执行 SQL 查询 */
export function useSqlarkQuery(
  db: MetonaSqlark,
  sql: string,
  deps: Ref<unknown>[] = [],
): { data: Ref<Record<string, unknown>[]>; loading: Ref<boolean>; error: Ref<Error | null>; refresh: () => void } {
  const data = ref<Record<string, unknown>[]>([]) as Ref<Record<string, unknown>[]>;
  const loading = ref(true);
  const error = ref<Error | null>(null) as Ref<Error | null>;

  const execute = async () => {
    loading.value = true;
    try {
      data.value = await db.query(sql) as Record<string, unknown>[];
      error.value = null;
    } catch (e) {
      error.value = e as Error;
    } finally {
      loading.value = false;
    }
  };

  onMounted(execute);
  watch([() => sql, ...deps], execute);

  return { data, loading, error, refresh: execute };
}

/** 表名合法性校验（防 SQL 注入） */
function validateTableName(name: string): string {
  if (!/^[a-zA-Z_][a-zA-Z0-9_]*$/.test(name)) {
    throw new Error(`Invalid table name: "${name}"`);
  }
  return name;
}

/** useSqlarkTable: 快速获取表数据 */
export function useSqlarkTable(
  db: MetonaSqlark,
  tableName: string,
): { data: Ref<Record<string, unknown>[]>; loading: Ref<boolean>; refresh: () => void } {
  const { data, loading, refresh } = useSqlarkQuery(db, `SELECT * FROM ${validateTableName(tableName)}`);
  return { data, loading, refresh };
}

/** useSqlarkDatabase: 创建/管理数据库实例 */
export function useSqlarkDatabase(config: import('../constants').DatabaseConfig): {
  db: Ref<MetonaSqlark | null>;
  ready: Ref<boolean>;
  error: Ref<Error | null>;
} {
  const db = ref<MetonaSqlark | null>(null) as Ref<MetonaSqlark | null>;
  const ready = ref(false);
  const error = ref<Error | null>(null) as Ref<Error | null>;

  onMounted(async () => {
    try {
      const instance = new MetonaSqlark(config);
      await instance.init();
      db.value = instance;
      ready.value = true;
    } catch (e) {
      error.value = e as Error;
    }
  });

  // v0.7.3: 组件卸载时关闭数据库 —— 此前实例永不 close（连接/锁/后端句柄泄漏）
  onUnmounted(() => {
    const instance = db.value;
    if (instance) {
      instance.close().catch(() => { /* 关闭失败不阻塞卸载 */ });
    }
  });

  return { db, ready, error };
}