CREATE DATABASE IF NOT EXISTS pdv_saas CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
USE pdv_saas;

CREATE TABLE companies (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(150) NOT NULL,
    email VARCHAR(150) NOT NULL UNIQUE,
    plan VARCHAR(50) NOT NULL DEFAULT 'starter',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    name VARCHAR(120) NOT NULL,
    email VARCHAR(150) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_users_company FOREIGN KEY (company_id) REFERENCES companies(id)
);

CREATE TABLE products (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    code VARCHAR(80) NOT NULL,
    name VARCHAR(150) NOT NULL,
    description TEXT NULL,
    sale_price DECIMAL(12,2) NOT NULL DEFAULT 0,
    cost_price DECIMAL(12,2) NOT NULL DEFAULT 0,
    stock_quantity INT NOT NULL DEFAULT 0,
    low_stock_alert INT NOT NULL DEFAULT 5,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_products_company FOREIGN KEY (company_id) REFERENCES companies(id),
    INDEX idx_products_company_code (company_id, code),
    INDEX idx_products_company_name (company_id, name)
);

CREATE TABLE sales (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    user_id INT NOT NULL,
    payment_method ENUM('cash', 'card', 'pix') NOT NULL,
    total_amount DECIMAL(12,2) NOT NULL DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_sales_company FOREIGN KEY (company_id) REFERENCES companies(id),
    CONSTRAINT fk_sales_user FOREIGN KEY (user_id) REFERENCES users(id),
    INDEX idx_sales_company_date (company_id, created_at)
);

CREATE TABLE sale_items (
    id INT AUTO_INCREMENT PRIMARY KEY,
    sale_id INT NOT NULL,
    company_id INT NOT NULL,
    product_id INT NOT NULL,
    quantity INT NOT NULL,
    unit_price DECIMAL(12,2) NOT NULL,
    unit_cost DECIMAL(12,2) NOT NULL,
    subtotal DECIMAL(12,2) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_sale_items_sale FOREIGN KEY (sale_id) REFERENCES sales(id),
    CONSTRAINT fk_sale_items_company FOREIGN KEY (company_id) REFERENCES companies(id),
    CONSTRAINT fk_sale_items_product FOREIGN KEY (product_id) REFERENCES products(id),
    INDEX idx_sale_items_company_date (company_id, created_at)
);

CREATE TABLE finance_entries (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    type ENUM('income', 'expense') NOT NULL,
    category VARCHAR(100) NOT NULL,
    description VARCHAR(255) NOT NULL,
    amount DECIMAL(12,2) NOT NULL,
    payment_method ENUM('cash', 'card', 'pix') DEFAULT NULL,
    reference_id INT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_finance_company FOREIGN KEY (company_id) REFERENCES companies(id),
    INDEX idx_finance_company_date (company_id, created_at),
    INDEX idx_finance_company_type (company_id, type)
);

CREATE TABLE integration_configs (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    provider VARCHAR(100) NOT NULL,
    api_key VARCHAR(255) NULL,
    webhook_url VARCHAR(255) NULL,
    is_active TINYINT(1) NOT NULL DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    CONSTRAINT fk_integrations_company FOREIGN KEY (company_id) REFERENCES companies(id),
    UNIQUE KEY uk_company_provider (company_id, provider)
);

-- Exemplo de provider para integração futura com WhatsApp:
-- INSERT INTO integration_configs (company_id, provider, is_active) VALUES (1, 'whatsapp', 0);