// knexfile.mjs (ESM格式)
export default {
    development: {
        client: "sqlite3",
        connection: {
            filename: "./database/development.sqlite3",
        },
        migrations: {
            directory: "./src/db/migrations", // 迁移文件目录
            // 启用ES模块支持
            extension: "mjs",
            loadExtensions: [".mjs", ".js"],
        },
        seeds: {
            directory: "./src/db/seeds", // 种子数据目录,
            // 启用ES模块支持
            extension: "mjs",
            loadExtensions: [".mjs", ".js"],
            timestampFilenamePrefix: true,
        },
        useNullAsDefault: true, // SQLite需要这一选项
        pool: {
            min: 1,
            max: 3, // 适当增加连接数以提高并发性能
            acquireTimeoutMillis: 60000, // 获取连接的超时时间
            createTimeoutMillis: 30000,  // 创建连接的超时时间
            destroyTimeoutMillis: 5000,  // 销毁连接的超时时间
            idleTimeoutMillis: 30000,    // 连接空闲超时时间
            reapIntervalMillis: 1000,    // 检查和回收连接的间隔
            createRetryIntervalMillis: 200, // 创建连接重试间隔
            afterCreate: (conn, done) => {
                // SQLite 性能优化设置
                conn.run("PRAGMA journal_mode = WAL", done) // 启用 WAL 模式提高并发
                conn.run("PRAGMA synchronous = NORMAL", done) // 平衡性能和安全性
                conn.run("PRAGMA cache_size = 1000", done)   // 增加缓存大小
                conn.run("PRAGMA temp_store = MEMORY", done) // 临时数据存储在内存中
                conn.run("PRAGMA mmap_size = 67108864", done) // 启用内存映射，64MB
                conn.run("PRAGMA foreign_keys = ON", done)   // 启用外键约束
            },
        },
    },

    // 生产环境、测试环境配置可按需添加
    production: {
        client: "sqlite3",
        connection: {
            filename: "./database/db.sqlite3",
        },
        migrations: {
            directory: "./src/db/migrations", // 迁移文件目录
            // 启用ES模块支持
            extension: "mjs",
            loadExtensions: [".mjs", ".js"],
        },
        seeds: {
            directory: "./src/db/seeds", // 种子数据目录,
            // 启用ES模块支持
            extension: "mjs",
            loadExtensions: [".mjs", ".js"],
            timestampFilenamePrefix: true,
        },
        useNullAsDefault: true, // SQLite需要这一选项
        pool: {
            min: 1,
            max: 5, // 生产环境适当增加连接数
            acquireTimeoutMillis: 60000,
            createTimeoutMillis: 30000,
            destroyTimeoutMillis: 5000,
            idleTimeoutMillis: 30000,
            reapIntervalMillis: 1000,
            createRetryIntervalMillis: 200,
            afterCreate: (conn, done) => {
                // SQLite 性能优化设置
                conn.run("PRAGMA journal_mode = WAL", done)
                conn.run("PRAGMA synchronous = NORMAL", done)
                conn.run("PRAGMA cache_size = 2000", done)   // 生产环境更大缓存
                conn.run("PRAGMA temp_store = MEMORY", done)
                conn.run("PRAGMA mmap_size = 134217728", done) // 128MB 内存映射
                conn.run("PRAGMA foreign_keys = ON", done)
                conn.run("PRAGMA auto_vacuum = INCREMENTAL", done) // 增量清理
            },
        },
    },
}