-- Department and Employee example: 
-- Uses pointers for the employees and for the department array
-- Allows dynamically allocating the employee array of the needed size
-- Input: 
--      n = number of departments (needs skipline to skip word departments)
--      for each of n departments
--          department name: read entire line
--          k = number of employees in this department (needs skipline)
--          for each of k employees
--              read name(1 .. 20), id, salary

with ada.text_io; use ada.text_io; 
with ada.float_text_io; use ada.float_text_io; 
with ada.integer_text_io; use ada.integer_text_io; 
 
with ada.strings.fixed; use ada.strings.fixed;
 
procedure employ7  is 
   type StringPtr is access String;

    type Employee is record
        name: StringPtr;
        id: string(1 .. 6);
        salary: float;
    end record;
    type Emp_Access is access Employee;

    type Emp_Array_T is array(natural range <>) of Emp_Access;
    type Emp_Array_Access_T is access Emp_Array_T;

    type Department is record
        name: StringPtr;
        emp_array: Emp_Array_Access_T;
    end record;

    type Department_Array_T is array(Natural range <>) of Department;

    --------------------------------------------------------
    -- Give all a raise, accessing the record directly
    procedure give_all_raise_v1(raise_amt: Float; emps: Emp_Array_Access_T) is
        e: Emp_Access;
    begin
        for i in reverse emps'range loop
            e := emps(i);  
            e.all.salary := e.all.salary + raise_amt;
        end loop;
    end give_all_raise_v1;


    --------------------------------------------------------
    procedure get_depts(depts: in out Department_Array_T) is
       emp_count: Natural;   -- Number of employees in this department
    begin
       for i in depts'range loop
          dept_loop: 
          declare
             dn: String := trim(get_line, Ada.Strings.Both);
             dnp: StringPtr := new String'(dn);
          begin
             depts(i).name := dnp;
             get(emp_count); 

             depts(i).emp_array := new Emp_Array_t(1 .. emp_count);

             for j in 1 .. emp_count loop
                skip_line;   -- skip rest of line

                empl_loop: 
                declare
                   en: String := trim(get_line, Ada.Strings.Both);
                   enp: StringPtr := new String'(en);
                begin
                   depts(i).emp_array(j) := new Employee;

                   depts(i).emp_array(j).name := enp; 
                   get(depts(i).emp_array(j).id);        -- All is implied
                   get(depts(i).emp_array(j).salary); 
                end empl_loop;
             end loop;
             skip_line;  -- After last number, must move to next line
          end dept_loop;
       end loop;
    end get_depts;

        
    --------------------------------------------------------
    -- Print all employees
    procedure put(emps: Emp_Array_Access_T) is
        e: Emp_Access;
    begin
        for i in emps'range loop
            e := emps(i);  
            set_col(6);
            put(e.all.id);
            put(e.salary, 9, 2, 0);  -- .all is implied
            put(" " & e.name.all);  -- Put for strings
            new_line;
        end loop;
    end put;


--------------------------------------------------------
    dept_count: Natural;   -- Number of departments 
begin
   get(dept_count);
   skip_line;   -- skip word departments

   declare
      -- Create an array of department's of the correct size
      dept_list: Department_Array_T(1 .. dept_count);
   begin
      get_depts(dept_list);

      -- print departments before raises
      put_line("Before raises:");
      for i in dept_list'range loop
         set_col(3);
         put_line(dept_list(i).name.all);
         put(dept_list(i).emp_array);
         new_line;
      end loop;

      -- Give raises
      for i in dept_list'range loop
         give_all_raise_v1(1000.0, dept_list(i).emp_array);
      end loop;

      -- print departments after raises
      put_line("After raises:");
      for i in dept_list'range loop
         set_col(3);
         put_line(dept_list(i).name.all);
         put(dept_list(i).emp_array);
         new_line;
      end loop;
   end; -- declare

end employ7;