-- SkyArtShop Database Schema Fixes
-- Date: December 18, 2025
-- Purpose: Fix missing columns, add constraints, optimize queries

-- =====================================================
-- PHASE 1: Fix Missing Columns
-- =====================================================

-- Fix pages table - add ispublished column
ALTER TABLE pages 
ADD COLUMN IF NOT EXISTS ispublished BOOLEAN DEFAULT true;

-- Standardize pages table columns
UPDATE pages SET ispublished = isactive WHERE ispublished IS NULL;

-- Fix portfolioprojects table - add imageurl column
ALTER TABLE portfolioprojects 
ADD COLUMN IF NOT EXISTS imageurl VARCHAR(500);

-- Migrate featuredimage to imageurl for consistency
UPDATE portfolioprojects 
SET imageurl = featuredimage 
WHERE imageurl IS NULL AND featuredimage IS NOT NULL;

-- =====================================================
-- PHASE 2: Add Missing Indexes for Performance
-- =====================================================

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

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

-- Portfolio projects indexes
CREATE INDEX IF NOT EXISTS idx_portfolioprojects_isactive ON portfolioprojects(isactive);
CREATE INDEX IF NOT EXISTS idx_portfolioprojects_categoryid ON portfolioprojects(categoryid);
CREATE INDEX IF NOT EXISTS idx_portfolioprojects_displayorder ON portfolioprojects(displayorder);

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

-- Admin users indexes
CREATE INDEX IF NOT EXISTS idx_adminusers_email ON adminusers(email);
CREATE INDEX IF NOT EXISTS idx_adminusers_isactive ON adminusers(isactive);
CREATE INDEX IF NOT EXISTS idx_adminusers_role_id ON adminusers(role_id);

-- Session index (for cleanup)
CREATE INDEX IF NOT EXISTS idx_session_expire ON session(expire);

-- =====================================================
-- PHASE 3: Add Constraints and Validations
-- =====================================================

-- Ensure NOT NULL constraints where appropriate
ALTER TABLE products 
ALTER COLUMN isactive SET DEFAULT true,
ALTER COLUMN isfeatured SET DEFAULT false,
ALTER COLUMN isbestseller SET DEFAULT false,
ALTER COLUMN stockquantity SET DEFAULT 0;

ALTER TABLE blogposts 
ALTER COLUMN ispublished SET DEFAULT false,
ALTER COLUMN views SET DEFAULT 0;

ALTER TABLE portfolioprojects 
ALTER COLUMN isactive SET DEFAULT true,
ALTER COLUMN displayorder SET DEFAULT 0;

ALTER TABLE pages 
ALTER COLUMN isactive SET DEFAULT true;

-- Add unique constraints
ALTER TABLE products DROP CONSTRAINT IF EXISTS unique_products_slug;
ALTER TABLE products ADD CONSTRAINT unique_products_slug UNIQUE(slug);

ALTER TABLE blogposts DROP CONSTRAINT IF EXISTS unique_blogposts_slug;
ALTER TABLE blogposts ADD CONSTRAINT unique_blogposts_slug UNIQUE(slug);

ALTER TABLE pages DROP CONSTRAINT IF EXISTS unique_pages_slug;
ALTER TABLE pages ADD CONSTRAINT unique_pages_slug UNIQUE(slug);

ALTER TABLE adminusers DROP CONSTRAINT IF EXISTS unique_adminusers_email;
ALTER TABLE adminusers ADD CONSTRAINT unique_adminusers_email UNIQUE(email);

-- Add check 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);

-- =====================================================
-- PHASE 4: Add Foreign Key Constraints
-- =====================================================

-- Portfolio projects to categories (if portfoliocategories table exists)
DO $$
BEGIN
    IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'portfoliocategories') THEN
        ALTER TABLE portfolioprojects DROP CONSTRAINT IF EXISTS fk_portfolioprojects_category;
        ALTER TABLE portfolioprojects 
        ADD CONSTRAINT fk_portfolioprojects_category 
        FOREIGN KEY (categoryid) REFERENCES portfoliocategories(id) 
        ON DELETE SET NULL;
    END IF;
END $$;

-- =====================================================
-- PHASE 5: Optimize Existing Data
-- =====================================================

-- Ensure all timestamps are set
UPDATE products SET updatedat = createdat WHERE updatedat IS NULL;
UPDATE blogposts SET updatedat = createdat WHERE updatedat IS NULL;
UPDATE portfolioprojects SET updatedat = createdat WHERE updatedat IS NULL;
UPDATE pages SET updatedat = createdat WHERE updatedat IS NULL;

-- Set default values for nullable booleans
UPDATE products SET isactive = true WHERE isactive IS NULL;
UPDATE products SET isfeatured = false WHERE isfeatured IS NULL;
UPDATE products SET isbestseller = false WHERE isbestseller IS NULL;

UPDATE blogposts SET ispublished = false WHERE ispublished IS NULL;
UPDATE portfolioprojects SET isactive = true WHERE isactive IS NULL;
UPDATE pages SET isactive = true WHERE isactive IS NULL;
UPDATE pages SET ispublished = true WHERE ispublished IS NULL;

-- =====================================================
-- PHASE 6: Create Useful Views for Reporting
-- =====================================================

-- View for active products with sales data
CREATE OR REPLACE VIEW v_active_products AS
SELECT 
    id, name, slug, price, stockquantity, category,
    imageurl, isfeatured, isbestseller,
    unitssold, totalrevenue, averagerating, totalreviews,
    createdat
FROM products 
WHERE isactive = true
ORDER BY createdat DESC;

-- View for published blog posts
CREATE OR REPLACE VIEW v_published_blogposts AS
SELECT 
    id, title, slug, excerpt, imageurl,
    authorname, publisheddate, views, tags,
    createdat
FROM blogposts 
WHERE ispublished = true
ORDER BY publisheddate DESC NULLS LAST, createdat DESC;

-- View for active portfolio projects
CREATE OR REPLACE VIEW v_active_portfolio AS
SELECT 
    id, title, description, imageurl, featuredimage,
    category, categoryid, displayorder,
    createdat
FROM portfolioprojects 
WHERE isactive = true
ORDER BY displayorder ASC, createdat DESC;

-- =====================================================
-- PHASE 7: Add Triggers for Automatic Timestamps
-- =====================================================

-- Function to update timestamp
CREATE OR REPLACE FUNCTION update_timestamp()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updatedat = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- Add triggers for products
DROP TRIGGER IF EXISTS trg_products_update ON products;
CREATE TRIGGER trg_products_update
    BEFORE UPDATE ON products
    FOR EACH ROW
    EXECUTE FUNCTION update_timestamp();

-- Add triggers for blogposts
DROP TRIGGER IF EXISTS trg_blogposts_update ON blogposts;
CREATE TRIGGER trg_blogposts_update
    BEFORE UPDATE ON blogposts
    FOR EACH ROW
    EXECUTE FUNCTION update_timestamp();

-- Add triggers for portfolioprojects
DROP TRIGGER IF EXISTS trg_portfolioprojects_update ON portfolioprojects;
CREATE TRIGGER trg_portfolioprojects_update
    BEFORE UPDATE ON portfolioprojects
    FOR EACH ROW
    EXECUTE FUNCTION update_timestamp();

-- Add triggers for pages
DROP TRIGGER IF EXISTS trg_pages_update ON pages;
CREATE TRIGGER trg_pages_update
    BEFORE UPDATE ON pages
    FOR EACH ROW
    EXECUTE FUNCTION update_timestamp();

-- Add triggers for adminusers
DROP TRIGGER IF EXISTS trg_adminusers_update ON adminusers;
CREATE TRIGGER trg_adminusers_update
    BEFORE UPDATE ON adminusers
    FOR EACH ROW
    EXECUTE FUNCTION update_timestamp();

-- =====================================================
-- PHASE 8: Clean Up Expired Sessions
-- =====================================================

-- Delete expired sessions (run periodically)
DELETE FROM session WHERE expire < NOW();

-- =====================================================
-- VERIFICATION QUERIES
-- =====================================================

-- Verify all critical columns exist
SELECT 
    'products' as table_name,
    EXISTS(SELECT 1 FROM information_schema.columns WHERE table_name='products' AND column_name='isactive') as has_isactive,
    EXISTS(SELECT 1 FROM information_schema.columns WHERE table_name='products' AND column_name='isfeatured') as has_isfeatured;

SELECT 
    'pages' as table_name,
    EXISTS(SELECT 1 FROM information_schema.columns WHERE table_name='pages' AND column_name='ispublished') as has_ispublished,
    EXISTS(SELECT 1 FROM information_schema.columns WHERE table_name='pages' AND column_name='isactive') as has_isactive;

SELECT 
    'portfolioprojects' as table_name,
    EXISTS(SELECT 1 FROM information_schema.columns WHERE table_name='portfolioprojects' AND column_name='imageurl') as has_imageurl,
    EXISTS(SELECT 1 FROM information_schema.columns WHERE table_name='portfolioprojects' AND column_name='isactive') as has_isactive;

-- Count indexes
SELECT 
    schemaname,
    tablename,
    COUNT(*) as index_count
FROM pg_indexes 
WHERE schemaname = 'public'
GROUP BY schemaname, tablename
ORDER BY tablename;

-- Verify constraints
SELECT
    tc.table_name,
    tc.constraint_type,
    COUNT(*) as constraint_count
FROM information_schema.table_constraints tc
WHERE tc.table_schema = 'public'
GROUP BY tc.table_name, tc.constraint_type
ORDER BY tc.table_name;