-- Table for Roles
CREATE TABLE Role (
    Role_ID INTEGER PRIMARY KEY,
    Nazev TEXT NOT NULL
);

-- Table for Employees (Zamestnanci)
CREATE TABLE Zamestnanci (
    ID_Uzivatele INTEGER PRIMARY KEY,
    Jmeno TEXT NOT NULL,
    Prijmeni TEXT NOT NULL,
    Role_ID INTEGER NOT NULL,
    Heslo TEXT NOT NULL,
    Email TEXT,
    Username TEXT NOT NULL UNIQUE,
    FOREIGN KEY (Role_ID) REFERENCES Role (Role_ID)
);

-- Table for Vehicles (Vozidla)
CREATE TABLE Vozidla (
    ID_Vozidla INTEGER PRIMARY KEY,
    Majitel TEXT NOT NULL,
    Barva TEXT NOT NULL,
    Typ TEXT NOT NULL
);

-- Table for Orders (Objednavky)
CREATE TABLE Objednavky (
    ID_Objednavky INTEGER PRIMARY KEY,
    Stav TEXT NOT NULL,
    ID_Zamestnance INTEGER NOT NULL,
    Popis TEXT,
    ID_Vozidla INTEGER NOT NULL,
    Datum_Zacatku DATE NOT NULL,
    Datum_Konce DATE,
    Cena REAL NOT NULL,
    FOREIGN KEY (ID_Zamestnance) REFERENCES Zamestnanci (ID_Uzivatele),
    FOREIGN KEY (ID_Vozidla) REFERENCES Vozidla (ID_Vozidla)
);

-- Table for Repairs (Opravy)
CREATE TABLE Opravy (
    ID_Opravy INTEGER PRIMARY KEY,
    ID_Zamestnance INTEGER NOT NULL,
    Nazev TEXT NOT NULL,
    Popis TEXT,
    FOREIGN KEY (ID_Zamestnance) REFERENCES Zamestnanci (ID_Uzivatele)
);

-- Linking table for Orders and Repairs (Objednavky_Opravy)
CREATE TABLE Objednavky_Opravy (
    ID_Objednavky_Opravy INTEGER PRIMARY KEY,
    ID_Objednavky INTEGER NOT NULL,
    ID_Opravy INTEGER NOT NULL,
    FOREIGN KEY (ID_Objednavky) REFERENCES Objednavky (ID_Objednavky),
    FOREIGN KEY (ID_Opravy) REFERENCES Opravy (ID_Opravy)
);

-- Table for Products (Produkty)
CREATE TABLE Produkty (
    ID_Produktu INTEGER PRIMARY KEY,
    Minimalni_Zasoba INTEGER NOT NULL,
    Momentalni_Zasoba INTEGER NOT NULL,
    Nazev TEXT NOT NULL,
    Popis TEXT
);

-- Table for Product Usage (Pouzite_Produkty)
CREATE TABLE Pouzite_Produkty (
    ID_Pouziti INTEGER PRIMARY KEY,
    ID_Opravy INTEGER NOT NULL,
    ID_Produktu INTEGER NOT NULL,
    Pocet_Produktu INTEGER NOT NULL,
    FOREIGN KEY (ID_Opravy) REFERENCES Opravy (ID_Opravy),
    FOREIGN KEY (ID_Produktu) REFERENCES Produkty (ID_Produktu)
);