-- App 下载页配置表
-- 存储各平台最新下载地址，由 uniCloud 云函数自动同步
-- type 区分 native_app（整包安装）和 wgt（热更新资源包）

CREATE TABLE IF NOT EXISTS public.app_download_configs (
    id           BIGSERIAL       PRIMARY KEY,
    platform     VARCHAR(20)     NOT NULL,
    type         VARCHAR(20)     NOT NULL DEFAULT 'native_app',
    download_url TEXT            NOT NULL,
    version      VARCHAR(50),
    created_at   BIGINT          NOT NULL DEFAULT (EXTRACT(EPOCH FROM NOW()) * 1000)::BIGINT,
    updated_at   BIGINT          NOT NULL DEFAULT (EXTRACT(EPOCH FROM NOW()) * 1000)::BIGINT,

    CONSTRAINT uq_app_download_configs_platform_type UNIQUE (platform, type)
);

COMMENT ON TABLE  public.app_download_configs IS 'App 下载页配置，存储各平台最新下载地址';
COMMENT ON COLUMN public.app_download_configs.platform     IS '平台标识：android / ios';
COMMENT ON COLUMN public.app_download_configs.type         IS '包类型：native_app（整包安装）/ wgt（热更新资源包）';
COMMENT ON COLUMN public.app_download_configs.download_url IS '下载地址或 App Store 链接';
COMMENT ON COLUMN public.app_download_configs.version      IS '版本号，如 1.0.5';

-- 预留序列起始值（按项目规范）
ALTER SEQUENCE public.app_download_configs_id_seq RESTART WITH 10000;