-- =========================================================
-- currency.sql 💰
-- 无物化视图 | 超可视提示 | 可重复执行
-- PostgreSQL 17.4+ 👍
-- =========================================================

-- 1️⃣ 开始 🚀
DO $$
BEGIN
    RAISE NOTICE '🚀============ currency 部署开始 ============🚀';
END $$;

-- 2️⃣ 连接目标库
\c postgres;

-- 3️⃣ 表结构 -----------------------------------
DO $$
BEGIN
    -- currency 主表
    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'currency') THEN
        CREATE TABLE currency (
            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
            deleted BOOLEAN NOT NULL DEFAULT FALSE,
            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
        );
        CREATE TRIGGER update_currency_updated_at
            BEFORE UPDATE ON currency
            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
        RAISE NOTICE '1️⃣✅ currency 主表已创建';
    ELSE
        RAISE NOTICE '1️⃣⏩ currency 主表已存在，跳过';
    END IF;

    -- currency_name
    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'currency_name') THEN
        CREATE TABLE currency_name (
            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
            currency_id UUID NOT NULL,
            name VARCHAR NOT NULL,
            deleted BOOLEAN NOT NULL DEFAULT FALSE,
            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
        );
        CREATE TRIGGER update_currency_name_updated_at
            BEFORE UPDATE ON currency_name
            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
        RAISE NOTICE '2️⃣✅ currency_name 子表已创建';
    ELSE
        RAISE NOTICE '2️⃣⏩ currency_name 子表已存在，跳过';
    END IF;

    -- currency_code
    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'currency_code') THEN
        CREATE TABLE currency_code (
            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
            currency_id UUID NOT NULL,
            code VARCHAR NOT NULL,
            deleted BOOLEAN NOT NULL DEFAULT FALSE,
            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
        );
        CREATE TRIGGER update_currency_code_updated_at
            BEFORE UPDATE ON currency_code
            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
        RAISE NOTICE '3️⃣✅ currency_code 子表已创建';
    ELSE
        RAISE NOTICE '3️⃣⏩ currency_code 子表已存在，跳过';
    END IF;
END $$;

-- 4️⃣ 视图 ------------------------------------
DO $$
DECLARE
    view_exists BOOLEAN;
BEGIN
    SELECT EXISTS (
        SELECT 1 FROM information_schema.views 
        WHERE table_name = 'currency_info_view'
    ) INTO view_exists;

    IF view_exists THEN
        DROP VIEW currency_info_view;
        RAISE NOTICE '4️⃣♻️ 已删除旧视图 currency_info_view';
    END IF;

    CREATE OR REPLACE VIEW currency_info_view AS
    SELECT
        u.id AS currency_id,
        n.name,
        c.code,
        u.deleted
    FROM currency u
    JOIN currency_name n ON u.id = n.currency_id AND n.deleted = FALSE
    JOIN currency_code c ON u.id = c.currency_id AND c.deleted = FALSE
    WHERE u.deleted = FALSE;

    RAISE NOTICE '4️⃣✅ currency_info_view 已创建/更新';
EXCEPTION
    WHEN OTHERS THEN
        RAISE NOTICE '4️⃣❌ 处理视图时发生错误: %', SQLERRM;
END $$;

-- 5️⃣ 性能索引 ------------------------------------------------
CREATE INDEX IF NOT EXISTS idx_currency_name_currency_id_deleted ON currency_name(currency_id, deleted);
CREATE INDEX IF NOT EXISTS idx_currency_code_currency_id_deleted ON currency_code(currency_id, deleted);

RAISE NOTICE '5️⃣✅ 全部索引已确保存在';

-- 6️⃣ 完成 🎉
DO $$
BEGIN
    RAISE NOTICE '🎉============ currency 部署完成 ============🎉';
END $$;