-- Invoice management tables

-- Customers table
CREATE TABLE customers (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    ico VARCHAR(20),
    dic VARCHAR(20),
    address TEXT,
    city VARCHAR(100),
    zip VARCHAR(10),
    country VARCHAR(100) DEFAULT 'Česká republika',
    email VARCHAR(255),
    phone VARCHAR(50),
    notes TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_by INTEGER,
    updated_by INTEGER
);

-- Invoices table
CREATE TABLE invoices (
    id SERIAL PRIMARY KEY,
    invoice_number VARCHAR(50) NOT NULL UNIQUE,
    invoice_type VARCHAR(20) DEFAULT 'faktura',
    variable_symbol VARCHAR(20),
    constant_symbol VARCHAR(20),
    specific_symbol VARCHAR(20),
    issue_date TIMESTAMP NOT NULL,
    due_date TIMESTAMP NOT NULL,
    taxable_supply_date TIMESTAMP,
    
    -- Supplier information (auto-filled from club settings)
    supplier_name VARCHAR(255) NOT NULL,
    supplier_ico VARCHAR(20),
    supplier_dic VARCHAR(20),
    supplier_address TEXT,
    supplier_city VARCHAR(100),
    supplier_zip VARCHAR(10),
    supplier_country VARCHAR(100) DEFAULT 'Česká republika',
    
    -- Supplier bank information
    bank_name VARCHAR(255),
    bank_account VARCHAR(50),
    bank_iban VARCHAR(50),
    bank_swift VARCHAR(20),
    
    -- Customer information
    customer_id INTEGER REFERENCES customers(id),
    customer_name VARCHAR(255) NOT NULL,
    customer_ico VARCHAR(20),
    customer_dic VARCHAR(20),
    customer_address TEXT,
    customer_city VARCHAR(100),
    customer_zip VARCHAR(10),
    customer_country VARCHAR(100) DEFAULT 'Česká republika',
    customer_email VARCHAR(255),
    customer_phone VARCHAR(50),
    
    -- Financial summary
    subtotal_ex_vat DECIMAL(12,2) DEFAULT 0,
    vat_amount DECIMAL(12,2) DEFAULT 0,
    total_amount DECIMAL(12,2) NOT NULL,
    paid_amount DECIMAL(12,2) DEFAULT 0,
    
    -- Status and dates
    status VARCHAR(50) DEFAULT 'draft',
    payment_status VARCHAR(50) DEFAULT 'unpaid',
    sent_at TIMESTAMP,
    paid_at TIMESTAMP,
    
    -- Notes and metadata
    notes TEXT,
    internal_notes TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_by INTEGER NOT NULL,
    updated_by INTEGER
);

-- Invoice items table
CREATE TABLE invoice_items (
    id SERIAL PRIMARY KEY,
    invoice_id INTEGER NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    quantity DECIMAL(10,2) NOT NULL DEFAULT 1,
    unit VARCHAR(50) DEFAULT 'ks',
    unit_price DECIMAL(12,2) NOT NULL,
    vat_rate DECIMAL(5,2) DEFAULT 21.00,
    vat_amount DECIMAL(12,2),
    total_price_ex_vat DECIMAL(12,2),
    total_price_with_vat DECIMAL(12,2),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Invoice payments table
CREATE TABLE invoice_payments (
    id SERIAL PRIMARY KEY,
    invoice_id INTEGER NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
    amount DECIMAL(12,2) NOT NULL,
    payment_date TIMESTAMP NOT NULL,
    payment_method VARCHAR(100),
    reference_number VARCHAR(255),
    notes TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_by INTEGER,
    updated_by INTEGER
);

-- Invoice documents table
CREATE TABLE invoice_documents (
    id SERIAL PRIMARY KEY,
    invoice_id INTEGER NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    type VARCHAR(100),
    file_name VARCHAR(500),
    file_path VARCHAR(500),
    file_size BIGINT,
    mime_type VARCHAR(100),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_by INTEGER,
    updated_by INTEGER
);

-- Invoice settings table (singleton)
CREATE TABLE invoice_settings (
    id SERIAL PRIMARY KEY,
    -- Default supplier information
    default_supplier_name VARCHAR(255),
    default_supplier_ico VARCHAR(20),
    default_supplier_dic VARCHAR(20),
    default_supplier_address TEXT,
    default_supplier_city VARCHAR(100),
    default_supplier_zip VARCHAR(10),
    default_supplier_country VARCHAR(100) DEFAULT 'Česká republika',
    
    -- Default bank information
    default_bank_name VARCHAR(255),
    default_bank_account VARCHAR(50),
    default_bank_iban VARCHAR(50),
    default_bank_swift VARCHAR(20),
    
    -- Invoice defaults
    default_due_days INTEGER DEFAULT 14,
    default_vat_rate DECIMAL(5,2) DEFAULT 21.00,
    default_payment_method VARCHAR(100),
    invoice_number_prefix VARCHAR(20) DEFAULT 'FV',
    next_invoice_number INTEGER DEFAULT 1,
    
    -- Email settings
    email_subject VARCHAR(255),
    email_body TEXT,
    send_emails BOOLEAN DEFAULT false,
    
    -- Other settings
    currency VARCHAR(3) DEFAULT 'CZK',
    language VARCHAR(10) DEFAULT 'cs',
    
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_by INTEGER,
    updated_by INTEGER
);

-- Indexes for performance
CREATE INDEX idx_customers_ico ON customers(ico);
CREATE INDEX idx_customers_email ON customers(email);
CREATE INDEX idx_invoices_number ON invoices(invoice_number);
CREATE INDEX idx_invoices_status ON invoices(status);
CREATE INDEX idx_invoices_payment_status ON invoices(payment_status);
CREATE INDEX idx_invoices_customer_id ON invoices(customer_id);
CREATE INDEX idx_invoices_issue_date ON invoices(issue_date);
CREATE INDEX idx_invoices_due_date ON invoices(due_date);
CREATE INDEX idx_invoice_items_invoice_id ON invoice_items(invoice_id);
CREATE INDEX idx_invoice_payments_invoice_id ON invoice_payments(invoice_id);
CREATE INDEX idx_invoice_documents_invoice_id ON invoice_documents(invoice_id);

-- Insert default invoice settings
INSERT INTO invoice_settings (
    default_supplier_name,
    default_due_days,
    default_vat_rate,
    invoice_number_prefix,
    next_invoice_number,
    currency,
    language
) VALUES (
    'Fotbalový klub',
    14,
    21.00,
    'FV',
    1,
    'CZK',
    'cs'
);