-- Initialize company setup (companies, statuses, folders) and core user management.
-- Designed for multi-tenant applications where each company has isolated data.

-- Companies Table: Stores information about each client company.
CREATE TABLE IF NOT EXISTS companies (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL UNIQUE,
    uprn_required BOOLEAN DEFAULT FALSE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Job Statuses Table: Stores custom job statuses defined by each company.
CREATE TABLE IF NOT EXISTS job_statuses (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    is_default BOOLEAN DEFAULT FALSE,
    sort_order INT DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (company_id) REFERENCES companies(id) ON DELETE CASCADE,
    UNIQUE KEY (company_id, name)
);

-- Required Folders Table: Stores mandatory folder structures defined by each company.
CREATE TABLE IF NOT EXISTS required_folders (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (company_id) REFERENCES companies(id) ON DELETE CASCADE,
    UNIQUE KEY (company_id, name)
);

-- Users Table: Stores user accounts. Each user belongs to a specific company.
CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    email VARCHAR(255) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    role ENUM('admin', 'standard') DEFAULT 'standard', -- Admin can manage company settings, standard users manage jobs.
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (company_id) REFERENCES companies(id) ON DELETE CASCADE
);

-- Clients Table: Stores clients for each company. Clients can be added, edited, but not deleted.
CREATE TABLE IF NOT EXISTS clients (
    id INT AUTO_INCREMENT PRIMARY KEY,
    company_id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    contact_person VARCHAR(255) DEFAULT NULL,
    email VARCHAR(255) DEFAULT NULL,
    phone VARCHAR(255) DEFAULT NULL,
    is_active BOOLEAN DEFAULT TRUE, -- Clients can be marked inactive instead of deleted.
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (company_id) REFERENCES companies(id) ON DELETE CASCADE,
    UNIQUE KEY (company_id, name) -- Ensure client names are unique per company
);