-- Enable strict error reporting
SET sql_mode = 'STRICT_ALL_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_ZERO_DATE,NO_ZERO_IN_DATE,NO_ENGINE_SUBSTITUTION';
SET FOREIGN_KEY_CHECKS = 0;

-- Create tables
CREATE TABLE products (
    product_id BIGINT NOT NULL,
    title VARCHAR(255) NOT NULL,
    SKU VARCHAR(50) NOT NULL,
    created_at TIMESTAMP NULL,
    stock_quantity INT DEFAULT 0,
    price DECIMAL(10, 3) NOT NULL,
    regular_price DECIMAL(10, 3) NOT NULL,
    cost_price DECIMAL(10, 3),
    landing_cost_price DECIMAL(10, 3),
    barcode VARCHAR(50),
    updated_at TIMESTAMP,
    visible BOOLEAN DEFAULT true,
    managing_stock BOOLEAN DEFAULT true,
    replenishable BOOLEAN DEFAULT true,
    vendor VARCHAR(100),
    vendor_reference VARCHAR(100),
    permalink VARCHAR(255),
    categories TEXT,
    image VARCHAR(255),
    brand VARCHAR(100),
    options TEXT,
    tags TEXT,
    moq INT DEFAULT 1,
    uom INT DEFAULT 1,
    PRIMARY KEY (product_id),
    UNIQUE KEY unique_sku (SKU),
    INDEX idx_vendor (vendor),
    INDEX idx_brand (brand)
) ENGINE=InnoDB;

-- Create categories table first (referenced by product_categories)
CREATE TABLE categories (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    description TEXT,
    parent_category VARCHAR(100),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    status VARCHAR(20) DEFAULT 'active',
    UNIQUE KEY unique_name (name),
    INDEX idx_parent (parent_category),
    INDEX idx_status (status)
) ENGINE=InnoDB;

-- Create vendor_details table
CREATE TABLE vendor_details (
    vendor VARCHAR(100) PRIMARY KEY,
    contact_name VARCHAR(100),
    email VARCHAR(255),
    phone VARCHAR(50),
    status VARCHAR(20) DEFAULT 'active',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    INDEX idx_status (status)
) ENGINE=InnoDB;

-- Create product_categories junction table
CREATE TABLE product_categories (
    product_id BIGINT NOT NULL,
    category_id BIGINT NOT NULL,
    PRIMARY KEY (product_id, category_id),
    FOREIGN KEY (product_id) REFERENCES products(product_id) ON DELETE CASCADE,
    FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE CASCADE,
    INDEX idx_category (category_id),
    INDEX idx_product (product_id),
    INDEX idx_product_categories_both (product_id, category_id)
) ENGINE=InnoDB;

-- Create orders table with its indexes
CREATE TABLE orders (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    order_number VARCHAR(50) NOT NULL,
    product_id BIGINT NOT NULL,
    SKU VARCHAR(50) NOT NULL,
    date DATE NOT NULL,
    price DECIMAL(10, 3) NOT NULL,
    quantity INT NOT NULL,
    discount DECIMAL(10, 3) DEFAULT 0,
    tax DECIMAL(10, 3) DEFAULT 0,
    tax_included BOOLEAN DEFAULT false,
    shipping DECIMAL(10, 3) DEFAULT 0,
    customer VARCHAR(50) NOT NULL,
    status VARCHAR(20) DEFAULT 'pending',
    payment_method VARCHAR(50),
    shipping_method VARCHAR(50),
    shipping_address TEXT,
    billing_address TEXT,
    canceled BOOLEAN DEFAULT false,
    FOREIGN KEY (product_id) REFERENCES products(product_id),
    FOREIGN KEY (SKU) REFERENCES products(SKU),
    INDEX idx_order_number (order_number),
    INDEX idx_customer (customer),
    INDEX idx_date (date),
    INDEX idx_status (status),
    INDEX idx_orders_metrics (product_id, date, canceled, quantity, price),
    INDEX idx_orders_product_date (product_id, date),
    UNIQUE KEY unique_order_product (order_number, product_id)
) ENGINE=InnoDB;

-- Create purchase_orders table with its indexes
CREATE TABLE purchase_orders (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    po_id VARCHAR(50) NOT NULL,
    vendor VARCHAR(100) NOT NULL,
    date DATE NOT NULL,
    expected_date DATE,
    product_id BIGINT NOT NULL,
    sku VARCHAR(50) NOT NULL,
    cost_price DECIMAL(10, 3) NOT NULL,
    status VARCHAR(20) DEFAULT 'pending',
    notes TEXT,
    ordered INT NOT NULL,
    received INT DEFAULT 0,
    received_date DATE,
    FOREIGN KEY (product_id) REFERENCES products(product_id),
    FOREIGN KEY (sku) REFERENCES products(SKU),
    INDEX idx_po_id (po_id),
    INDEX idx_vendor (vendor),
    INDEX idx_status (status),
    INDEX idx_purchase_orders_metrics (product_id, date, status, ordered, received),
    INDEX idx_po_product_date (product_id, date),
    INDEX idx_po_product_status (product_id, status),
    UNIQUE KEY unique_po_product (po_id, product_id)
) ENGINE=InnoDB;

SET FOREIGN_KEY_CHECKS = 1;

-- Create views for common calculations
-- product_sales_trends view moved to metrics-schema.sql