-- =====================================================
-- DATABASE ANALYSIS & FIXES FOR SKYARTSHOP
-- Date: January 3, 2026
-- Purpose: Comprehensive database schema validation and fixes
-- =====================================================

-- =====================================================
-- PART 1: VERIFY CORE TABLES EXIST
-- =====================================================

-- Ensure all required tables exist
DO $$
BEGIN
    -- Check if tables exist and create if missing
    IF NOT EXISTS (SELECT FROM pg_tables WHERE schemaname = 'public' AND tablename = 'products') THEN
        RAISE EXCEPTION 'CRITICAL: products table is missing!';
    END IF;
    
    IF NOT EXISTS (SELECT FROM pg_tables WHERE schemaname = 'public' AND tablename = 'product_images') THEN
        RAISE NOTICE 'product_images table is missing - will be created';
    END IF;
    
    IF NOT EXISTS (SELECT FROM pg_tables WHERE schemaname = 'public' AND tablename = 'adminusers') THEN
        RAISE EXCEPTION 'CRITICAL: adminusers table is missing!';
    END IF;
    
    IF NOT EXISTS (SELECT FROM pg_tables WHERE schemaname = 'public' AND tablename = 'uploads') THEN
        RAISE NOTICE 'uploads table is missing - will be created';
    END IF;
    
    IF NOT EXISTS (SELECT FROM pg_tables WHERE schemaname = 'public' AND tablename = 'media_folders') THEN
        RAISE NOTICE 'media_folders table is missing - will be created';
    END IF;
END $$;

-- =====================================================
-- PART 2: VERIFY AND ADD MISSING COLUMNS
-- =====================================================

-- Products table columns
ALTER TABLE products ADD COLUMN IF NOT EXISTS id TEXT PRIMARY KEY DEFAULT replace(gen_random_uuid()::text, '-', '');
ALTER TABLE products ADD COLUMN IF NOT EXISTS name VARCHAR(255) NOT NULL DEFAULT '';
ALTER TABLE products ADD COLUMN IF NOT EXISTS slug VARCHAR(255);
ALTER TABLE products ADD COLUMN IF NOT EXISTS shortdescription TEXT;
ALTER TABLE products ADD COLUMN IF NOT EXISTS description TEXT;
ALTER TABLE products ADD COLUMN IF NOT EXISTS price DECIMAL(10,2) NOT NULL DEFAULT 0.00;
ALTER TABLE products ADD COLUMN IF NOT EXISTS stockquantity INTEGER DEFAULT 0;
ALTER TABLE products ADD COLUMN IF NOT EXISTS category VARCHAR(100);
ALTER TABLE products ADD COLUMN IF NOT EXISTS sku VARCHAR(100);
ALTER TABLE products ADD COLUMN IF NOT EXISTS weight DECIMAL(10,2);
ALTER TABLE products ADD COLUMN IF NOT EXISTS dimensions VARCHAR(100);
ALTER TABLE products ADD COLUMN IF NOT EXISTS material VARCHAR(255);
ALTER TABLE products ADD COLUMN IF NOT EXISTS isactive BOOLEAN DEFAULT true;
ALTER TABLE products ADD COLUMN IF NOT EXISTS isfeatured BOOLEAN DEFAULT false;
ALTER TABLE products ADD COLUMN IF NOT EXISTS isbestseller BOOLEAN DEFAULT false;
ALTER TABLE products ADD COLUMN IF NOT EXISTS createdat TIMESTAMP DEFAULT NOW();
ALTER TABLE products ADD COLUMN IF NOT EXISTS updatedat TIMESTAMP DEFAULT NOW();
ALTER TABLE products ADD COLUMN IF NOT EXISTS metakeywords TEXT;

-- Portfolio projects columns
ALTER TABLE portfolioprojects ADD COLUMN IF NOT EXISTS imageurl VARCHAR(500);
ALTER TABLE portfolioprojects ADD COLUMN IF NOT EXISTS featuredimage VARCHAR(500);
ALTER TABLE portfolioprojects ADD COLUMN IF NOT EXISTS images JSONB;
ALTER TABLE portfolioprojects ADD COLUMN IF NOT EXISTS displayorder INTEGER DEFAULT 0;

-- Pages table columns
ALTER TABLE pages ADD COLUMN IF NOT EXISTS ispublished BOOLEAN DEFAULT true;
ALTER TABLE pages ADD COLUMN IF NOT EXISTS pagecontent TEXT;

-- Blog posts columns
ALTER TABLE blogposts ADD COLUMN IF NOT EXISTS excerpt TEXT;
ALTER TABLE blogposts ADD COLUMN IF NOT EXISTS imageurl VARCHAR(500);

-- =====================================================
-- PART 3: CREATE PRODUCT_IMAGES TABLE (IF MISSING)
-- =====================================================

CREATE TABLE IF NOT EXISTS product_images (
  id TEXT PRIMARY KEY DEFAULT replace(gen_random_uuid()::text, '-', ''),
  product_id TEXT NOT NULL,
  image_url VARCHAR(500) NOT NULL,
  color_variant VARCHAR(100),
  color_code VARCHAR(7),
  alt_text VARCHAR(255),
  display_order INTEGER DEFAULT 0,
  is_primary BOOLEAN DEFAULT FALSE,
  variant_price DECIMAL(10,2),
  variant_stock INTEGER DEFAULT 0,
  created_at TIMESTAMP DEFAULT NOW(),
  CONSTRAINT fk_product_images_product FOREIGN KEY (product_id) 
    REFERENCES products(id) ON DELETE CASCADE
);

-- =====================================================
-- PART 4: CREATE UPLOADS & MEDIA_FOLDERS TABLES
-- =====================================================

CREATE TABLE IF NOT EXISTS media_folders (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    parent_id INTEGER REFERENCES media_folders(id) ON DELETE CASCADE,
    path VARCHAR(1000) NOT NULL,
    created_by TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(parent_id, name)
);

CREATE TABLE IF NOT EXISTS uploads (
    id SERIAL PRIMARY KEY,
    filename VARCHAR(255) NOT NULL UNIQUE,
    original_name VARCHAR(255) NOT NULL,
    file_path VARCHAR(500) NOT NULL,
    file_size INTEGER NOT NULL,
    mime_type VARCHAR(100) NOT NULL,
    uploaded_by TEXT,
    folder_id INTEGER REFERENCES media_folders(id) ON DELETE SET NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    used_in_type VARCHAR(50),
    used_in_id TEXT
);

-- =====================================================
-- PART 5: CREATE SITE_SETTINGS TABLE
-- =====================================================

CREATE TABLE IF NOT EXISTS site_settings (
    id SERIAL PRIMARY KEY,
    key VARCHAR(100) UNIQUE NOT NULL,
    settings JSONB NOT NULL DEFAULT '{}'::jsonb,
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

-- Insert default settings if not exists
INSERT INTO site_settings (key, settings) VALUES
('menu', '{"items": []}'::jsonb),
('homepage', '{"hero": {}, "sections": []}'::jsonb)
ON CONFLICT (key) DO NOTHING;

-- =====================================================
-- PART 6: CREATE TEAM_MEMBERS TABLE
-- =====================================================

CREATE TABLE IF NOT EXISTS team_members (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    position VARCHAR(255) NOT NULL,
    bio TEXT,
    image_url VARCHAR(500),
    display_order INTEGER DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- =====================================================
-- PART 7: ADD ALL CRITICAL INDEXES
-- =====================================================

-- Products indexes
CREATE INDEX IF NOT EXISTS idx_products_isactive ON products(isactive) WHERE isactive = true;
CREATE INDEX IF NOT EXISTS idx_products_isfeatured ON products(isfeatured) WHERE isfeatured = true AND isactive = true;
CREATE INDEX IF NOT EXISTS idx_products_slug ON products(slug) WHERE isactive = true;
CREATE INDEX IF NOT EXISTS idx_products_category ON products(category) WHERE isactive = true;
CREATE INDEX IF NOT EXISTS idx_products_createdat ON products(createdat DESC) WHERE isactive = true;
CREATE INDEX IF NOT EXISTS idx_products_composite ON products(isactive, isfeatured, createdat DESC);

-- Product images indexes
CREATE INDEX IF NOT EXISTS idx_product_images_product_id ON product_images(product_id);
CREATE INDEX IF NOT EXISTS idx_product_images_is_primary ON product_images(product_id, is_primary) WHERE is_primary = true;
CREATE INDEX IF NOT EXISTS idx_product_images_display_order ON product_images(product_id, display_order, created_at);
CREATE INDEX IF NOT EXISTS idx_product_images_color ON product_images(color_variant);

-- Blog posts indexes
CREATE INDEX IF NOT EXISTS idx_blogposts_ispublished ON blogposts(ispublished) WHERE ispublished = true;
CREATE INDEX IF NOT EXISTS idx_blogposts_slug ON blogposts(slug) WHERE ispublished = true;
CREATE INDEX IF NOT EXISTS idx_blogposts_createdat ON blogposts(createdat DESC) WHERE ispublished = true;

-- Portfolio projects indexes
CREATE INDEX IF NOT EXISTS idx_portfolio_isactive ON portfolioprojects(isactive) WHERE isactive = true;
CREATE INDEX IF NOT EXISTS idx_portfolio_display ON portfolioprojects(displayorder ASC, createdat DESC) WHERE isactive = true;

-- Pages indexes
CREATE INDEX IF NOT EXISTS idx_pages_slug ON pages(slug) WHERE isactive = true;
CREATE INDEX IF NOT EXISTS idx_pages_isactive ON pages(isactive) WHERE isactive = true;

-- Homepage sections indexes
CREATE INDEX IF NOT EXISTS idx_homepagesections_display ON homepagesections(displayorder ASC);

-- Team members indexes
CREATE INDEX IF NOT EXISTS idx_team_members_display ON team_members(display_order ASC, created_at DESC);

-- Uploads indexes
CREATE INDEX IF NOT EXISTS idx_uploads_filename ON uploads(filename);
CREATE INDEX IF NOT EXISTS idx_uploads_created_at ON uploads(created_at DESC);
CREATE INDEX IF NOT EXISTS idx_uploads_folder_id ON uploads(folder_id);
CREATE INDEX IF NOT EXISTS idx_uploads_usage ON uploads(used_in_type, used_in_id);

-- Media folders indexes
CREATE INDEX IF NOT EXISTS idx_media_folders_parent_id ON media_folders(parent_id);
CREATE INDEX IF NOT EXISTS idx_media_folders_path ON media_folders(path);

-- Session table optimization
CREATE INDEX IF NOT EXISTS idx_session_expire ON session(expire);

-- =====================================================
-- PART 8: ADD UNIQUE CONSTRAINTS
-- =====================================================

-- Ensure unique slugs
DO $$
BEGIN
    -- Products slug constraint
    IF NOT EXISTS (
        SELECT 1 FROM pg_constraint 
        WHERE conname = 'unique_products_slug'
    ) THEN
        ALTER TABLE products ADD CONSTRAINT unique_products_slug 
        UNIQUE(slug);
    END IF;
    
    -- Blog posts slug constraint
    IF NOT EXISTS (
        SELECT 1 FROM pg_constraint 
        WHERE conname = 'unique_blogposts_slug'
    ) THEN
        ALTER TABLE blogposts ADD CONSTRAINT unique_blogposts_slug 
        UNIQUE(slug);
    END IF;
    
    -- Pages slug constraint
    IF NOT EXISTS (
        SELECT 1 FROM pg_constraint 
        WHERE conname = 'unique_pages_slug'
    ) THEN
        ALTER TABLE pages ADD CONSTRAINT unique_pages_slug 
        UNIQUE(slug);
    END IF;
END $$;

-- =====================================================
-- PART 9: ADD CHECK CONSTRAINTS FOR DATA INTEGRITY
-- =====================================================

-- Products constraints
ALTER TABLE products DROP CONSTRAINT IF EXISTS check_products_price_positive;
ALTER TABLE products ADD CONSTRAINT check_products_price_positive 
CHECK (price >= 0);

ALTER TABLE products DROP CONSTRAINT IF EXISTS check_products_stock_nonnegative;
ALTER TABLE products ADD CONSTRAINT check_products_stock_nonnegative 
CHECK (stockquantity >= 0);

-- Product images constraints
ALTER TABLE product_images DROP CONSTRAINT IF EXISTS check_variant_price_positive;
ALTER TABLE product_images ADD CONSTRAINT check_variant_price_positive 
CHECK (variant_price IS NULL OR variant_price >= 0);

ALTER TABLE product_images DROP CONSTRAINT IF EXISTS check_variant_stock_nonnegative;
ALTER TABLE product_images ADD CONSTRAINT check_variant_stock_nonnegative 
CHECK (variant_stock >= 0);

-- =====================================================
-- PART 10: DATA MIGRATION & CLEANUP
-- =====================================================

-- Generate slugs for products missing them
UPDATE products 
SET slug = LOWER(REGEXP_REPLACE(REGEXP_REPLACE(name, '[^a-zA-Z0-9\s-]', '', 'g'), '\s+', '-', 'g'))
WHERE (slug IS NULL OR slug = '') AND name IS NOT NULL;

-- Set ispublished for pages from isactive
UPDATE pages 
SET ispublished = isactive 
WHERE ispublished IS NULL;

-- Migrate portfolio featured image if needed
UPDATE portfolioprojects 
SET imageurl = featuredimage 
WHERE imageurl IS NULL AND featuredimage IS NOT NULL;

-- =====================================================
-- PART 11: ANALYZE TABLES FOR QUERY OPTIMIZATION
-- =====================================================

ANALYZE products;
ANALYZE product_images;
ANALYZE blogposts;
ANALYZE portfolioprojects;
ANALYZE pages;
ANALYZE homepagesections;
ANALYZE uploads;
ANALYZE media_folders;
ANALYZE team_members;
ANALYZE site_settings;

-- =====================================================
-- PART 12: VERIFICATION QUERIES
-- =====================================================

-- Show table row counts
SELECT 'products' as table_name, COUNT(*) as row_count FROM products
UNION ALL
SELECT 'product_images', COUNT(*) FROM product_images
UNION ALL
SELECT 'blogposts', COUNT(*) FROM blogposts
UNION ALL
SELECT 'portfolioprojects', COUNT(*) FROM portfolioprojects
UNION ALL
SELECT 'pages', COUNT(*) FROM pages
UNION ALL
SELECT 'uploads', COUNT(*) FROM uploads
UNION ALL
SELECT 'media_folders', COUNT(*) FROM media_folders
UNION ALL
SELECT 'team_members', COUNT(*) FROM team_members
UNION ALL
SELECT 'adminusers', COUNT(*) FROM adminusers
ORDER BY table_name;

-- Show index usage
SELECT 
    schemaname,
    tablename,
    indexname,
    idx_scan as times_used,
    idx_tup_read as rows_read,
    idx_tup_fetch as rows_fetched
FROM pg_stat_user_indexes
WHERE schemaname = 'public'
ORDER BY tablename, indexname;

-- Show foreign key constraints
SELECT
    tc.table_name, 
    kcu.column_name, 
    ccu.table_name AS foreign_table_name,
    ccu.column_name AS foreign_column_name,
    rc.update_rule,
    rc.delete_rule
FROM information_schema.table_constraints AS tc
JOIN information_schema.key_column_usage AS kcu
    ON tc.constraint_name = kcu.constraint_name
JOIN information_schema.constraint_column_usage AS ccu
    ON ccu.constraint_name = tc.constraint_name
JOIN information_schema.referential_constraints AS rc
    ON tc.constraint_name = rc.constraint_name
WHERE tc.constraint_type = 'FOREIGN KEY' 
    AND tc.table_schema = 'public'
ORDER BY tc.table_name, kcu.column_name;

-- =====================================================
-- END OF DATABASE ANALYSIS & FIXES
-- =====================================================