-- Bunks
CREATE TABLE IF NOT EXISTS bunks (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    owner VARCHAR(255),
    contact VARCHAR(50),
    location TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
-- Users and Roles
CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(100) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    role ENUM('Superadmin', 'Manager', 'Attendant', 'Accountant') NOT NULL,
    bunk_id INT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE SET NULL
);
-- Fuel Types
CREATE TABLE IF NOT EXISTS fuel_types (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50) NOT NULL UNIQUE,
    unit VARCHAR(20) DEFAULT 'Litre'
);
-- Tanks
CREATE TABLE IF NOT EXISTS tanks (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    bunk_id INT NOT NULL,
    fuel_type_id INT NOT NULL,
    capacity DECIMAL(10,2) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE,
    FOREIGN KEY (fuel_type_id) REFERENCES fuel_types(id)
);
-- Pumps
CREATE TABLE IF NOT EXISTS pumps (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    bunk_id INT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE
);
-- Nozzles (each nozzle belongs to a pump and draws from a tank)
CREATE TABLE IF NOT EXISTS nozzles (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    pump_id INT NOT NULL,
    tank_id INT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (pump_id) REFERENCES pumps(id) ON DELETE CASCADE,
    FOREIGN KEY (tank_id) REFERENCES tanks(id) ON DELETE CASCADE
);
-- Price History (fuel pricing)
CREATE TABLE IF NOT EXISTS price_history (
    id INT AUTO_INCREMENT PRIMARY KEY,
    fuel_type_id INT NOT NULL,
    bunk_id INT NOT NULL,
    price DECIMAL(10,2) NOT NULL,
    date DATE NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE KEY bunk_fuel_date (bunk_id, fuel_type_id, date),
    FOREIGN KEY (fuel_type_id) REFERENCES fuel_types(id),
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE
);
-- Tank Readings (daily, per tank, unique per date)
CREATE TABLE IF NOT EXISTS tank_readings (
    id INT AUTO_INCREMENT PRIMARY KEY,
    tank_id INT NOT NULL,
    date DATE NOT NULL,
    opening DECIMAL(10,2) NOT NULL,
    receipts DECIMAL(10,2) DEFAULT 0,
    closing DECIMAL(10,2) DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE KEY tank_date_unique (tank_id, date),
    FOREIGN KEY (tank_id) REFERENCES tanks(id) ON DELETE CASCADE
);
-- Daily Sales (per nozzle)
CREATE TABLE IF NOT EXISTS day_sales (
    id INT AUTO_INCREMENT PRIMARY KEY,
    nozzle_id INT NOT NULL,
    bunk_id INT NOT NULL,
    date DATE NOT NULL,
    opening_reading DECIMAL(10,2) NOT NULL,
    closing_reading DECIMAL(10,2) NOT NULL,
    testing DECIMAL(10,2) DEFAULT 0,
    net_sale DECIMAL(10,2) GENERATED ALWAYS AS (closing_reading - opening_reading - testing) STORED,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE KEY nozzle_date_unique (nozzle_id, date),
    FOREIGN KEY (nozzle_id) REFERENCES nozzles(id) ON DELETE CASCADE,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE
);
-- Fuel Purchases / Receipts
CREATE TABLE IF NOT EXISTS fuel_receipts (
    id INT AUTO_INCREMENT PRIMARY KEY,
    bunk_id INT NOT NULL,
    supplier VARCHAR(255),
    invoice_number VARCHAR(100),
    fuel_type_id INT NOT NULL,
    quantity DECIMAL(10,2) NOT NULL,
    rate DECIMAL(10,2) NOT NULL,
    amount DECIMAL(10,2) NOT NULL,
    date DATE NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE,
    FOREIGN KEY (fuel_type_id) REFERENCES fuel_types(id)
);
-- Credit Customers
CREATE TABLE IF NOT EXISTS credit_customers (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    contact VARCHAR(50),
    bunk_id INT NOT NULL,
    credit_limit DECIMAL(10,2) DEFAULT 0,
    outstanding_balance DECIMAL(10,2) DEFAULT 0,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE
);
-- Credit Sales
CREATE TABLE IF NOT EXISTS credit_sales (
    id INT AUTO_INCREMENT PRIMARY KEY,
    bunk_id INT NOT NULL,
    customer_id INT NOT NULL,
    date DATE NOT NULL,
    fuel_type_id INT NOT NULL,
    quantity DECIMAL(10,2) NOT NULL,
    rate DECIMAL(10,2) NOT NULL,
    amount DECIMAL(10,2) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE,
    FOREIGN KEY (customer_id) REFERENCES credit_customers(id),
    FOREIGN KEY (fuel_type_id) REFERENCES fuel_types(id)
);
-- Expenses
CREATE TABLE IF NOT EXISTS expenses (
    id INT AUTO_INCREMENT PRIMARY KEY,
    bunk_id INT NOT NULL,
    category VARCHAR(100) NOT NULL,
    amount DECIMAL(10,2) NOT NULL,
    description TEXT,
    payment_mode VARCHAR(50),
    date DATE NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (bunk_id) REFERENCES bunks(id) ON DELETE CASCADE
);
-- Add a Superadmin User
INSERT IGNORE INTO users (name, email, password, role) VALUES
('Superadmin', 'admin@example.com', '$2y$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi', 'Superadmin'); -- password = "password"