class EmployeeDatabase {
    constructor() {
        this.db = JSON.parse(window.localStorage.getItem('employeeDB')) || {
            employees: [],
            lastUpdate: new Date().toISOString()
        };
    }
    
    save() {
        window.localStorage.setItem('employeeDB', JSON.stringify(this.db));
    }
    
    addEmployee(employeeData) {
        // Process 1C data
        const employee = {
            id: this.generateId(),
            fullName: employeeData.B,
            birthDate: employeeData.N,
            hireDate: employeeData.H,
            terminationDate: employeeData.I,
            tabNumber: employeeData.A,
            position: employeeData.C,
            rank: employeeData.D,
            territory: employeeData.E,
            organization: employeeData.F,
            department: employeeData.G,
            // Add all other fields from the specification
            // ...
            updatedAt: new Date().toISOString()
        };
        
        this.db.employees.push(employee);
        this.save();
        return employee;
    }
    
    updateEmployee(tabNumber, newData) {
        const index = this.db.employees.findIndex(e => e.tabNumber === tabNumber);
        if (index !== -1) {
            this.db.employees[index] = {
                ...this.db.employees[index],
                ...newData,
                updatedAt: new Date().toISOString()
            };
            this.save();
            return true;
        }
        return false;
    }
    
    findEmployee(tabNumber) {
        return this.db.employees.find(e => e.tabNumber === tabNumber);
    }
    
    getAllEmployees() {
        return this.db.employees;
    }
    
    generateId() {
        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
            const r = Math.random() * 16 | 0;
            const v = c === 'x' ? r : (r & 0x3 | 0x8);
            return v.toString(16);
        });
    }
    
    // Add methods for processing different file types
    process1CData(workbook) {
        // Implementation for processing 1C data
    }
    
    processFlightData(workbook) {
        // Implementation for processing flight data
    }
    
    processPositionData(workbook) {
        // Implementation for processing position data
    }
}

// Export for use in other files
if (typeof module !== 'undefined' && module.exports) {
    module.exports = EmployeeDatabase;
} else {
    window.EmployeeDatabase = EmployeeDatabase;
}