-- ===================================================================
-- 安全的全局配置表初始化脚本
-- 适配现有表结构，避免字段冲突
-- ===================================================================

-- 首先检查现有的 ak_languages 表结构
DO $$
DECLARE
    rec RECORD;
BEGIN
    RAISE NOTICE '========================================';
    RAISE NOTICE '检查现有 ak_languages 表结构：';
    RAISE NOTICE '========================================';
    
    IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_schema = 'public' AND table_name = 'ak_languages') THEN
        FOR rec IN 
            SELECT column_name, data_type, is_nullable, column_default
            FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_languages'
            ORDER BY ordinal_position
        LOOP
            RAISE NOTICE '列: % - 类型: % - 可空: % - 默认值: %', 
                rec.column_name, rec.data_type, rec.is_nullable, rec.column_default;
        END LOOP;
    ELSE
        RAISE NOTICE 'ak_languages 表不存在';
    END IF;
    
    RAISE NOTICE '========================================';
END $$;

-- 检查并创建必要的扩展
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- 1. 检查并创建/修改主配置表
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.tables 
        WHERE table_schema = 'public' AND table_name = 'ak_global_config'
    ) THEN
        -- 如果主配置表不存在，创建新的主表+翻译表结构
        CREATE TABLE public.ak_global_config (
            id UUID DEFAULT uuid_generate_v4() PRIMARY KEY,
            config_key VARCHAR(100) NOT NULL UNIQUE,
            config_type VARCHAR(50) DEFAULT 'string',
            config_category VARCHAR(50) DEFAULT 'general',
            default_value TEXT,
            is_translatable BOOLEAN DEFAULT false,
            is_active BOOLEAN DEFAULT true,
            sort_order INTEGER DEFAULT 0,
            created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
            updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
        );
        RAISE NOTICE '已创建新的 ak_global_config 主表';
    ELSE
        RAISE NOTICE 'ak_global_config 表已存在，检查是否需要添加字段';
        
        -- 检查并添加缺失的字段
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_global_config' 
            AND column_name = 'config_category'
        ) THEN
            ALTER TABLE public.ak_global_config ADD COLUMN config_category VARCHAR(50) DEFAULT 'general';
            RAISE NOTICE '已添加 config_category 字段';
        END IF;
        
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_global_config' 
            AND column_name = 'is_translatable'
        ) THEN
            ALTER TABLE public.ak_global_config ADD COLUMN is_translatable BOOLEAN DEFAULT false;
            RAISE NOTICE '已添加 is_translatable 字段';
        END IF;
        
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_global_config' 
            AND column_name = 'sort_order'
        ) THEN
            ALTER TABLE public.ak_global_config ADD COLUMN sort_order INTEGER DEFAULT 0;
            RAISE NOTICE '已添加 sort_order 字段';
        END IF;
        
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_global_config' 
            AND column_name = 'default_value'
        ) THEN
            ALTER TABLE public.ak_global_config ADD COLUMN default_value TEXT;
            RAISE NOTICE '已添加 default_value 字段';
        END IF;
    END IF;
END $$;

-- 2. 创建翻译表
CREATE TABLE IF NOT EXISTS public.ak_global_config_translations (
    id UUID DEFAULT uuid_generate_v4() PRIMARY KEY,
    config_id UUID NOT NULL REFERENCES public.ak_global_config(id) ON DELETE CASCADE,
    language_code VARCHAR(10) NOT NULL,
    translated_value TEXT NOT NULL,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(config_id, language_code)
);

-- 3. 适配现有的 ak_languages 表
DO $$
BEGIN
    IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_schema = 'public' AND table_name = 'ak_languages') THEN
        RAISE NOTICE '使用现有的 ak_languages 表';
        
        -- 检查并添加可能缺失的字段
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_languages' 
            AND column_name = 'sort_order'
        ) THEN
            ALTER TABLE public.ak_languages ADD COLUMN sort_order INTEGER DEFAULT 0;
            RAISE NOTICE '已为 ak_languages 表添加 sort_order 字段';
        END IF;
        
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_languages' 
            AND column_name = 'is_default'
        ) THEN
            ALTER TABLE public.ak_languages ADD COLUMN is_default BOOLEAN DEFAULT false;
            RAISE NOTICE '已为 ak_languages 表添加 is_default 字段';
        END IF;
        
        IF NOT EXISTS (
            SELECT 1 FROM information_schema.columns 
            WHERE table_schema = 'public' AND table_name = 'ak_languages' 
            AND column_name = 'native_name'
        ) THEN
            ALTER TABLE public.ak_languages ADD COLUMN native_name VARCHAR(100);
            RAISE NOTICE '已为 ak_languages 表添加 native_name 字段';
        END IF;
    ELSE
        -- 创建新的语言表
        CREATE TABLE public.ak_languages (
            id UUID DEFAULT uuid_generate_v4() PRIMARY KEY,
            code VARCHAR(10) NOT NULL UNIQUE,
            name VARCHAR(100) NOT NULL,
            native_name VARCHAR(100) NOT NULL,
            is_active BOOLEAN DEFAULT true,
            is_default BOOLEAN DEFAULT false,
            sort_order INTEGER DEFAULT 0,
            created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
        );
        RAISE NOTICE '已创建新的 ak_languages 表';
    END IF;
END $$;

-- 4. 创建索引
CREATE INDEX IF NOT EXISTS idx_ak_global_config_key ON public.ak_global_config(config_key);
CREATE INDEX IF NOT EXISTS idx_ak_global_config_active ON public.ak_global_config(is_active);
CREATE INDEX IF NOT EXISTS idx_ak_global_config_category ON public.ak_global_config(config_category);
CREATE INDEX IF NOT EXISTS idx_ak_global_config_translatable ON public.ak_global_config(is_translatable);

CREATE INDEX IF NOT EXISTS idx_ak_global_config_translations_config ON public.ak_global_config_translations(config_id);
CREATE INDEX IF NOT EXISTS idx_ak_global_config_translations_lang ON public.ak_global_config_translations(language_code);
CREATE INDEX IF NOT EXISTS idx_ak_global_config_translations_active ON public.ak_global_config_translations(is_active);

CREATE INDEX IF NOT EXISTS idx_ak_languages_code ON public.ak_languages(code);
CREATE INDEX IF NOT EXISTS idx_ak_languages_active ON public.ak_languages(is_active);

-- 5. 安全地插入语言数据（动态构建 INSERT 语句）
DO $$
DECLARE
    has_sort_order BOOLEAN;
    has_is_default BOOLEAN;
    has_native_name BOOLEAN;
    insert_sql TEXT;
BEGIN
    -- 检查字段是否存在
    SELECT EXISTS (
        SELECT 1 FROM information_schema.columns 
        WHERE table_schema = 'public' AND table_name = 'ak_languages' AND column_name = 'sort_order'
    ) INTO has_sort_order;
    
    SELECT EXISTS (
        SELECT 1 FROM information_schema.columns 
        WHERE table_schema = 'public' AND table_name = 'ak_languages' AND column_name = 'is_default'
    ) INTO has_is_default;
    
    SELECT EXISTS (
        SELECT 1 FROM information_schema.columns 
        WHERE table_schema = 'public' AND table_name = 'ak_languages' AND column_name = 'native_name'
    ) INTO has_native_name;
    
    -- 构建动态 INSERT 语句
    insert_sql := 'INSERT INTO public.ak_languages (code, name';
    
    IF has_native_name THEN
        insert_sql := insert_sql || ', native_name';
    END IF;
    
    IF has_is_default THEN
        insert_sql := insert_sql || ', is_default';
    END IF;
    
    IF has_sort_order THEN
        insert_sql := insert_sql || ', sort_order';
    END IF;
    
    insert_sql := insert_sql || ') VALUES ';
    insert_sql := insert_sql || '(''zh'', ''Chinese Simplified''';
    
    IF has_native_name THEN
        insert_sql := insert_sql || ', ''简体中文''';
    END IF;
    
    IF has_is_default THEN
        insert_sql := insert_sql || ', true';
    END IF;
    
    IF has_sort_order THEN
        insert_sql := insert_sql || ', 1';
    END IF;
    
    insert_sql := insert_sql || '), (''en'', ''English''';
    
    IF has_native_name THEN
        insert_sql := insert_sql || ', ''English''';
    END IF;
    
    IF has_is_default THEN
        insert_sql := insert_sql || ', false';
    END IF;
    
    IF has_sort_order THEN
        insert_sql := insert_sql || ', 2';
    END IF;
    
    insert_sql := insert_sql || ') ON CONFLICT (code) DO UPDATE SET name = EXCLUDED.name';
    
    IF has_native_name THEN
        insert_sql := insert_sql || ', native_name = EXCLUDED.native_name';
    END IF;
    
    IF has_is_default THEN
        insert_sql := insert_sql || ', is_default = EXCLUDED.is_default';
    END IF;
    
    IF has_sort_order THEN
        insert_sql := insert_sql || ', sort_order = EXCLUDED.sort_order';
    END IF;
    
    -- 执行动态 SQL
    EXECUTE insert_sql;
    
    RAISE NOTICE '已安全插入语言数据';
    RAISE NOTICE '执行的 SQL: %', insert_sql;
END $$;

-- 6. 显示最终的表结构确认
DO $$
DECLARE
    rec RECORD;
BEGIN
    RAISE NOTICE '========================================';
    RAISE NOTICE '最终的 ak_languages 表结构：';
    FOR rec IN 
        SELECT column_name, data_type, is_nullable
        FROM information_schema.columns 
        WHERE table_schema = 'public' AND table_name = 'ak_languages'
        ORDER BY ordinal_position
    LOOP
        RAISE NOTICE '  - % (%)', rec.column_name, rec.data_type;
    END LOOP;
    
    RAISE NOTICE '========================================';
    RAISE NOTICE '语言数据：';
    FOR rec IN 
        SELECT code, name FROM public.ak_languages ORDER BY code
    LOOP
        RAISE NOTICE '  - %: %', rec.code, rec.name;
    END LOOP;
    RAISE NOTICE '========================================';
END $$;