-- Migration: Create tickets table for support system
-- Description: Stores support tickets from users/companies

CREATE TABLE IF NOT EXISTS tickets (
    id SERIAL PRIMARY KEY,
    user_id INT REFERENCES users(id) ON DELETE SET NULL,
    company_id INT REFERENCES companies(id) ON DELETE SET NULL,
    
    -- Ticket Info
    subject VARCHAR(255) NOT NULL,
    description TEXT NOT NULL,
    category VARCHAR(50) DEFAULT 'general' CHECK (category IN ('general', 'billing', 'technical', 'feature_request', 'bug_report', 'account')),
    priority VARCHAR(20) DEFAULT 'medium' CHECK (priority IN ('low', 'medium', 'high', 'urgent')),
    status VARCHAR(20) DEFAULT 'open' CHECK (status IN ('open', 'in_progress', 'waiting_response', 'resolved', 'closed')),
    
    -- Assignment
    assigned_to INT REFERENCES users(id) ON DELETE SET NULL,
    
    -- Metadata
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    resolved_at TIMESTAMP
);

-- Ticket messages/replies
CREATE TABLE IF NOT EXISTS ticket_messages (
    id SERIAL PRIMARY KEY,
    ticket_id INT NOT NULL REFERENCES tickets(id) ON DELETE CASCADE,
    user_id INT REFERENCES users(id) ON DELETE SET NULL,
    message TEXT NOT NULL,
    is_internal BOOLEAN DEFAULT false,  -- Internal notes not visible to user
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Indexes
CREATE INDEX idx_tickets_user ON tickets(user_id);
CREATE INDEX idx_tickets_company ON tickets(company_id);
CREATE INDEX idx_tickets_status ON tickets(status);
CREATE INDEX idx_tickets_priority ON tickets(priority);
CREATE INDEX idx_tickets_assigned ON tickets(assigned_to);
CREATE INDEX idx_ticket_messages_ticket ON ticket_messages(ticket_id);

COMMENT ON TABLE tickets IS 'Support tickets from users and companies';
COMMENT ON TABLE ticket_messages IS 'Messages/replies within a support ticket';