unit DeviceStore;

{$mode objfpc}{$H+}

// Общее хранилище устройств — единый источник правды для десктоп-диалога
// (DeviceForm) и web-оверлея. Владеет сохранёнными устройствами (persist в
// hpsdr_devices.ini) и текущим списком найденных при discovery.
// Контроллер (TRadioController) держит один экземпляр; фронтенды работают
// через него, поэтому списки не расходятся.

interface

uses
  Classes, SysUtils, IniFiles, BoardUtils, PlatformUtils;

const
  DEVICE_CFG_NAME = 'hpsdr_devices.ini';

type
  // Запись о сохранённом устройстве
  TSavedDevice = record
    Name:      string;   // пользовательское имя
    IPAddress: string;
    BoardType: Integer;
    AutoStart: Boolean;  // запускать автоматически при старте
  end;

  // Найденное устройство (результат discovery)
  TDiscoveredDevice = record
    IPAddress:   string;
    DisplayName: string;
    BoardType:   Integer;
    MAC:         array[0..5] of Byte;   // нужен для preload-rate lookup (LoadDevice по MAC)
  end;

  { TDeviceStore }
  TDeviceStore = class
  private
    FSaved:      array of TSavedDevice;
    FSavedCount: Integer;
    FDiscovered: array of TDiscoveredDevice;
    FDiscoveredCount: Integer;
  public
    constructor Create;

    // ---- Сохранённые устройства ----
    procedure LoadSaved;
    procedure SaveSaved;
    function  SavedCount: Integer;
    function  Saved(Idx: Integer): TSavedDevice;
    // Добавляет запись (Name пустое → 'HPSDR'); возвращает индекс новой записи.
    function  AddSaved(const AName, IP: string; BoardType: Integer): Integer;
    procedure RemoveSaved(Idx: Integer);
    procedure SetAutoStart(Idx: Integer);   // эксклюзивно: только одно autostart
    function  AutoStartIP: string;
    function  AutoStartBoardType: Integer;
    function  SavedBoardType(Idx: Integer): Integer;
    function  SavedDisplay(Idx: Integer): string;   // строка для списка (с * и board)

    // ---- Найденные (discovery) ----
    procedure ClearDiscovered;
    procedure AddDiscovered(const IP, DisplayName: string; BoardType: Integer;
                            const MAC: array of Byte);
    function  DiscoveredCount: Integer;
    function  Discovered(Idx: Integer): TDiscoveredDevice;
    // IP найденного устройства по IP (для preload-rate lookup и т.п.)
    function  FindDiscoveredByIP(const IP: string): Integer;
  end;

implementation

{ TDeviceStore }

constructor TDeviceStore.Create;
begin
  inherited Create;
  FSavedCount      := 0;
  FDiscoveredCount := 0;
  LoadSaved;
end;

procedure TDeviceStore.LoadSaved;
var
  Ini: TIniFile;
  I, N: Integer;
  Section: string;
begin
  FSavedCount := 0;
  SetLength(FSaved, 0);
  if not FileExists(GetAppCfgDir + DEVICE_CFG_NAME) then Exit;

  Ini := TIniFile.Create(GetAppCfgDir + DEVICE_CFG_NAME);
  try
    N := Ini.ReadInteger('Devices', 'Count', 0);
    SetLength(FSaved, N);
    for I := 0 to N - 1 do
    begin
      Section := 'Device' + IntToStr(I);
      FSaved[I].Name      := Ini.ReadString (Section, 'Name',      'HPSDR');
      FSaved[I].IPAddress := Ini.ReadString (Section, 'IP',        '');
      FSaved[I].BoardType := Ini.ReadInteger(Section, 'BoardType', 0);
      FSaved[I].AutoStart := Ini.ReadBool   (Section, 'AutoStart', False);
      Inc(FSavedCount);
    end;
  finally
    Ini.Free;
  end;
end;

procedure TDeviceStore.SaveSaved;
var
  Ini: TIniFile;
  I:   Integer;
  Section: string;
begin
  Ini := TIniFile.Create(GetAppCfgDir + DEVICE_CFG_NAME);
  try
    Ini.WriteInteger('Devices', 'Count', FSavedCount);
    for I := 0 to FSavedCount - 1 do
    begin
      Section := 'Device' + IntToStr(I);
      Ini.WriteString (Section, 'Name',      FSaved[I].Name);
      Ini.WriteString (Section, 'IP',        FSaved[I].IPAddress);
      Ini.WriteInteger(Section, 'BoardType', FSaved[I].BoardType);
      Ini.WriteBool   (Section, 'AutoStart', FSaved[I].AutoStart);
    end;
  finally
    Ini.Free;
  end;
end;

function TDeviceStore.SavedCount: Integer;
begin
  Result := FSavedCount;
end;

function TDeviceStore.Saved(Idx: Integer): TSavedDevice;
begin
  if (Idx >= 0) and (Idx < FSavedCount) then
    Result := FSaved[Idx]
  else
  begin
    Result.Name := ''; Result.IPAddress := '';
    Result.BoardType := 0; Result.AutoStart := False;
  end;
end;

function TDeviceStore.AddSaved(const AName, IP: string; BoardType: Integer): Integer;
begin
  Result := FSavedCount;
  Inc(FSavedCount);
  SetLength(FSaved, FSavedCount);
  if Trim(AName) <> '' then FSaved[Result].Name := Trim(AName)
  else                      FSaved[Result].Name := 'HPSDR';
  FSaved[Result].IPAddress := Trim(IP);
  FSaved[Result].BoardType := BoardType;
  FSaved[Result].AutoStart := False;
  SaveSaved;
end;

procedure TDeviceStore.RemoveSaved(Idx: Integer);
var
  I: Integer;
begin
  if (Idx < 0) or (Idx >= FSavedCount) then Exit;
  for I := Idx to FSavedCount - 2 do
    FSaved[I] := FSaved[I + 1];
  Dec(FSavedCount);
  SetLength(FSaved, FSavedCount);
  SaveSaved;
end;

procedure TDeviceStore.SetAutoStart(Idx: Integer);
var
  I: Integer;
begin
  if (Idx < 0) or (Idx >= FSavedCount) then Exit;
  // Только одно устройство может быть AutoStart
  for I := 0 to FSavedCount - 1 do
    FSaved[I].AutoStart := (I = Idx);
  SaveSaved;
end;

function TDeviceStore.AutoStartIP: string;
var
  I: Integer;
begin
  Result := '';
  for I := 0 to FSavedCount - 1 do
    if FSaved[I].AutoStart then
    begin
      Result := FSaved[I].IPAddress;
      Exit;
    end;
end;

function TDeviceStore.AutoStartBoardType: Integer;
var
  I: Integer;
begin
  Result := 0;
  for I := 0 to FSavedCount - 1 do
    if FSaved[I].AutoStart then
    begin
      Result := FSaved[I].BoardType;
      Exit;
    end;
end;

function TDeviceStore.SavedBoardType(Idx: Integer): Integer;
begin
  if (Idx >= 0) and (Idx < FSavedCount) then
    Result := FSaved[Idx].BoardType
  else
    Result := 0;
end;

function TDeviceStore.SavedDisplay(Idx: Integer): string;
begin
  Result := '';
  if (Idx < 0) or (Idx >= FSavedCount) then Exit;
  Result := FSaved[Idx].Name + '  [' + FSaved[Idx].IPAddress + ']';
  if FSaved[Idx].BoardType > 0 then
    Result := Result + '  ' + BoardTypeName(FSaved[Idx].BoardType);
  if FSaved[Idx].AutoStart then
    Result := '* ' + Result;
end;

procedure TDeviceStore.ClearDiscovered;
begin
  FDiscoveredCount := 0;
  SetLength(FDiscovered, 0);
end;

procedure TDeviceStore.AddDiscovered(const IP, DisplayName: string; BoardType: Integer;
  const MAC: array of Byte);
var
  Idx, J: Integer;
begin
  Idx := FDiscoveredCount;
  Inc(FDiscoveredCount);
  SetLength(FDiscovered, FDiscoveredCount);
  FDiscovered[Idx].IPAddress   := IP;
  FDiscovered[Idx].DisplayName := DisplayName;
  FDiscovered[Idx].BoardType   := BoardType;
  FillChar(FDiscovered[Idx].MAC, SizeOf(FDiscovered[Idx].MAC), 0);
  for J := 0 to High(MAC) do
    if J <= 5 then FDiscovered[Idx].MAC[J] := MAC[J];
end;

function TDeviceStore.DiscoveredCount: Integer;
begin
  Result := FDiscoveredCount;
end;

function TDeviceStore.Discovered(Idx: Integer): TDiscoveredDevice;
begin
  if (Idx >= 0) and (Idx < FDiscoveredCount) then
    Result := FDiscovered[Idx]
  else
  begin
    Result.IPAddress := ''; Result.DisplayName := ''; Result.BoardType := 0;
  end;
end;

function TDeviceStore.FindDiscoveredByIP(const IP: string): Integer;
var
  I: Integer;
begin
  Result := -1;
  for I := 0 to FDiscoveredCount - 1 do
    if SameText(FDiscovered[I].IPAddress, IP) then
    begin
      Result := I;
      Exit;
    end;
end;

end.