-- Create invoice management tables
-- Migration: 20250110000002_create_invoice_tables

-- Invoice settings table
CREATE TABLE invoice_settings (
    id SERIAL PRIMARY KEY,
    company_name VARCHAR(255) NOT NULL,
    company_ico VARCHAR(20) NOT NULL,
    company_dic VARCHAR(20),
    company_address TEXT,
    company_city VARCHAR(100),
    company_zip VARCHAR(10),
    company_country VARCHAR(100) DEFAULT 'Česká republika',
    bank_name VARCHAR(255),
    bank_account VARCHAR(50),
    bank_iban VARCHAR(50),
    bank_swift VARCHAR(20),
    invoice_number_format VARCHAR(100) DEFAULT 'F{year}{seq:6}',
    next_invoice_number INTEGER DEFAULT 1,
    current_year INTEGER,
    default_payment_term INTEGER DEFAULT 14,
    default_vat_rate DECIMAL(5,2) DEFAULT 21.0,
    default_currency VARCHAR(3) DEFAULT 'CZK',
    email_from VARCHAR(255),
    email_subject VARCHAR(255) DEFAULT 'Faktura č. {invoice_number}',
    email_body TEXT,
    pdf_logo_path VARCHAR(500),
    pdf_footer TEXT,
    registration_number VARCHAR(50),
    tax_registration_number VARCHAR(50),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_by INTEGER
);

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

CREATE INDEX idx_invoice_customers_ico ON invoice_customers(ico);
CREATE INDEX idx_invoice_customers_active ON invoice_customers(active);
CREATE INDEX idx_invoice_customers_name ON invoice_customers(name);

-- Invoice sequences table
CREATE TABLE invoice_sequences (
    id SERIAL PRIMARY KEY,
    type VARCHAR(50) NOT NULL,
    year INTEGER NOT NULL,
    current_number INTEGER DEFAULT 1,
    prefix VARCHAR(20),
    suffix VARCHAR(20),
    padding INTEGER DEFAULT 6,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(type, year)
);

-- Insert default sequences
INSERT INTO invoice_sequences (type, year, current_number, prefix) VALUES 
('faktura', EXTRACT(YEAR FROM CURRENT_DATE), 1, 'F'),
('zalohova_faktura', EXTRACT(YEAR FROM CURRENT_DATE), 1, 'ZF'),
('proforma_faktura', EXTRACT(YEAR FROM CURRENT_DATE), 1, 'PF'),
('dobropis', EXTRACT(YEAR FROM CURRENT_DATE), 1, 'D');

-- Invoice templates table
CREATE TABLE invoice_templates (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    type VARCHAR(50) NOT NULL,
    description TEXT,
    header_html TEXT,
    body_html TEXT,
    footer_html TEXT,
    css TEXT,
    default_vat_rate DECIMAL(5,2) DEFAULT 21.0,
    default_payment_term INTEGER DEFAULT 14,
    active BOOLEAN DEFAULT true,
    default BOOLEAN DEFAULT false,
    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)
    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 invoice_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
    total_amount DECIMAL(15,2) NOT NULL,
    total_vat DECIMAL(15,2) NOT NULL,
    total_amount_vat DECIMAL(15,2) NOT NULL,
    total_amount_without_vat DECIMAL(15,2) NOT NULL,
    currency VARCHAR(3) DEFAULT 'CZK',
    
    -- Status and workflow
    status VARCHAR(20) DEFAULT 'draft',
    payment_status VARCHAR(20) DEFAULT 'unpaid',
    payment_date TIMESTAMP,
    paid_amount DECIMAL(15,2) DEFAULT 0,
    
    -- Additional information
    note TEXT,
    payment_note TEXT,
    internal_note TEXT,
    
    -- PDF and sending
    pdf_path VARCHAR(500),
    pdf_generated_at TIMESTAMP,
    sent_at TIMESTAMP,
    sent_to TEXT,
    
    -- Metadata
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_by INTEGER,
    updated_by INTEGER
);

CREATE INDEX idx_invoices_invoice_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_invoices_customer_ico ON invoices(customer_ico);

-- Invoice items table
CREATE TABLE invoice_items (
    id SERIAL PRIMARY KEY,
    invoice_id INTEGER NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
    description TEXT NOT NULL,
    quantity DECIMAL(12,3) NOT NULL,
    unit VARCHAR(20) DEFAULT 'ks',
    unit_price DECIMAL(15,2) NOT NULL,
    total_price DECIMAL(15,2) NOT NULL,
    vat_rate DECIMAL(5,2) NOT NULL,
    vat_amount DECIMAL(15,2) NOT NULL,
    total_with_vat DECIMAL(15,2) NOT NULL,
    code VARCHAR(100),
    note TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX idx_invoice_items_invoice_id ON invoice_items(invoice_id);

-- Invoice payments table
CREATE TABLE invoice_payments (
    id SERIAL PRIMARY KEY,
    invoice_id INTEGER NOT NULL REFERENCES invoices(id) ON DELETE CASCADE,
    amount DECIMAL(15,2) NOT NULL,
    currency VARCHAR(3) DEFAULT 'CZK',
    payment_date TIMESTAMP NOT NULL,
    payment_method VARCHAR(50),
    variable_symbol VARCHAR(20),
    constant_symbol VARCHAR(20),
    specific_symbol VARCHAR(20),
    bank_account VARCHAR(50),
    note TEXT,
    reference_number VARCHAR(255),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_by INTEGER
);

CREATE INDEX idx_invoice_payments_invoice_id ON invoice_payments(invoice_id);
CREATE INDEX idx_invoice_payments_payment_date ON invoice_payments(payment_date);

-- Insert default invoice settings
INSERT INTO invoice_settings (
    company_name,
    company_ico,
    company_dic,
    company_address,
    company_city,
    company_zip,
    company_country,
    bank_name,
    bank_account,
    bank_iban,
    bank_swift,
    invoice_number_format,
    next_invoice_number,
    current_year,
    default_payment_term,
    default_vat_rate,
    default_currency,
    email_subject,
    registration_number,
    tax_registration_number
) VALUES (
    'Fotbalový klub',
    '12345678',
    'CZ12345678',
    'Sportovní 1',
    'Praha',
    '11000',
    'Česká republika',
    'Česká spořitelna',
    '123456789/0800',
    'CZ650800000000123456789',
    'GIBACZPX',
    'F{year}{seq:6}',
    1,
    EXTRACT(YEAR FROM CURRENT_DATE)::INTEGER,
    14,
    21.0,
    'CZK',
    'Faktura č. {invoice_number}',
    'Spisová značka: 12345',
    'DIČ: CZ12345678'
);

-- Insert default invoice template
INSERT INTO invoice_templates (
    name,
    type,
    description,
    header_html,
    body_html,
    footer_html,
    css,
    default_vat_rate,
    default_payment_term,
    active,
    default
) VALUES (
    'Standardní faktura',
    'standard',
    'Standardní šablona pro faktury',
    '<div class="invoice-header">
        <div class="logo">
            <img src="{logo_url}" alt="Logo" />
        </div>
        <div class="supplier-info">
            <h2>{supplier_name}</h2>
            <p>{supplier_address}</p>
            <p>{supplier_zip} {supplier_city}</p>
            <p>IČO: {supplier_ico}</p>
            {supplier_dic ? `<p>DIČ: {supplier_dic}</p>` : ''}
        </div>
        <div class="invoice-info">
            <h1>Faktura</h1>
            <p>Číslo: {invoice_number}</p>
            <p>Datum vydání: {issue_date}</p>
            <p>Datum splatnosti: {due_date}</p>
            <p> Datum zdanitelného plnění: {taxable_supply_date}</p>
        </div>
    </div>',
    '<div class="invoice-body">
        <div class="customer-info">
            <h3>Odběratel</h3>
            <p><strong>{customer_name}</strong></p>
            {customer_ico ? `<p>IČO: {customer_ico}</p>` : ''}
            {customer_dic ? `<p>DIČ: {customer_dic}</p>` : ''}
            <p>{customer_address}</p>
            <p>{customer_zip} {customer_city}</p>
            {customer_country !== 'Česká republika' ? `<p>{customer_country}</p>` : ''}
        </div>
        <div class="invoice-items">
            <table>
                <thead>
                    <tr>
                        <th>Položka</th>
                        <th>Množství</th>
                        <th>Jedn. cena</th>
                        <th>DPH %</th>
                        <th>Celkem</th>
                    </tr>
                </thead>
                <tbody>
                    {items}
                </tbody>
            </table>
        </div>
        <div class="invoice-summary">
            <table>
                <tr>
                    <td>Celkem bez DPH:</td>
                    <td class="amount">{total_amount_without_vat}</td>
                </tr>
                <tr>
                    <td>DPH {total_vat_rate}%:</td>
                    <td class="amount">{total_vat}</td>
                </tr>
                <tr class="total">
                    <td>Celkem k úhradě:</td>
                    <td class="amount">{total_amount_vat}</td>
                </tr>
            </table>
        </div>
    </div>',
    '<div class="invoice-footer">
        <div class="payment-info">
            <h3>Platební údaje</h3>
            <p><strong>Banka:</strong> {bank_name}</p>
            <p><strong>Číslo účtu:</strong> {bank_account}</p>
            <p><strong>IBAN:</strong> {bank_iban}</p>
            <p><strong>SWIFT:</strong> {bank_swift}</p>
            {variable_symbol ? `<p><strong>Var. symbol:</strong> {variable_symbol}</p>` : ''}
            {constant_symbol ? `<p><strong>Konst. symbol:</strong> {constant_symbol}</p>` : ''}
        </div>
        <div class="notes">
            {payment_note ? `<p><strong>Poznámka:</strong> {payment_note}</p>` : ''}
            {note ? `<p>{note}</p>` : ''}
        </div>
        <div class="signature">
            <p>Vystavil:</p>
            <div class="signature-line"></div>
        </div>
    </div>',
    'body { font-family: Arial, sans-serif; margin: 0; padding: 20px; }
    .invoice-header { display: flex; justify-content: space-between; margin-bottom: 40px; }
    .logo img { max-height: 80px; }
    .invoice-info { text-align: right; }
    .invoice-info h1 { margin: 0; font-size: 24px; }
    .invoice-body { margin-bottom: 40px; }
    .customer-info { margin-bottom: 30px; }
    .invoice-items table { width: 100%; border-collapse: collapse; margin-bottom: 20px; }
    .invoice-items th, .invoice-items td { border: 1px solid #ddd; padding: 8px; text-align: left; }
    .invoice-items th { background-color: #f5f5f5; }
    .invoice-items .amount { text-align: right; }
    .invoice-summary table { width: 300px; margin-left: auto; }
    .invoice-summary td { padding: 5px; }
    .invoice-summary .total { font-weight: bold; border-top: 2px solid #333; }
    .invoice-footer { margin-top: 40px; }
    .payment-info { margin-bottom: 20px; }
    .signature-line { border-bottom: 1px solid #333; width: 200px; margin-top: 40px; }',
    21.0,
    14,
    true,
    true
);

-- Create trigger to update updated_at column
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ language 'plpgsql';

-- Apply the trigger to all invoice tables
CREATE TRIGGER update_invoice_settings_updated_at BEFORE UPDATE ON invoice_settings FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_invoice_customers_updated_at BEFORE UPDATE ON invoice_customers FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_invoice_sequences_updated_at BEFORE UPDATE ON invoice_sequences FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_invoice_templates_updated_at BEFORE UPDATE ON invoice_templates FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_invoices_updated_at BEFORE UPDATE ON invoices FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_invoice_items_updated_at BEFORE UPDATE ON invoice_items FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_invoice_payments_updated_at BEFORE UPDATE ON invoice_payments FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();