{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
  SPDX-License-Identifier: Apache-2.0 }

{ ------------------------------ Downloading ESP-IDF ------------------------------ }

var
  IDFZIPFileVersion, IDFZIPFileName: String;

function GetIDFPath(Unused: String): String;
begin
  if IDFUseExisting then
    Result := IDFExistingPath
  else
    Result := IDFDownloadPath;
end;

function GetIDFZIPFileVersion(Version: String): String;
var
  ReleaseVerPart: String;
  i: Integer;
  Found: Boolean;
begin
  if WildCardMatch(Version, 'v*') or WildCardMatch(Version, 'v*-rc*') then
    Result := Version
  else if Version = 'master' then
    Result := ''
  else if WildCardMatch(Version, 'release/v*') then
  begin
    ReleaseVerPart := Version;
    Log('ReleaseVerPart=' + ReleaseVerPart)
    Delete(ReleaseVerPart, 1, Length('release/'));
    Log('ReleaseVerPart=' + ReleaseVerPart)
    Found := False;
    for i := 0 to GetArrayLength(IDFDownloadAvailableVersions) - 1 do
    begin
      if Pos(ReleaseVerPart, IDFDownloadAvailableVersions[i]) = 1 then
      begin
        Result := IDFDownloadAvailableVersions[i];
        Found := True;
        break;
      end;
    end;
    if not Found then
      Result := '';
  end;
  Log('GetIDFZIPFileVersion(' + Version + ')=' + Result);
end;

procedure IDFAddDownload();
var
  Url, MirrorUrl: String;
begin
  IDFZIPFileVersion := GetIDFZIPFileVersion(IDFDownloadVersion);
  if IDFZIPFileVersion <> '' then
  begin
    Url := 'https://github.com/espressif/esp-idf/releases/download/' + IDFZIPFileVersion + '/esp-idf-' + IDFZIPFileVersion + '.zip';
    MirrorUrl := 'https://dl.espressif.com/github_assets/espressif/esp-idf/releases/download/' + IDFZIPFileVersion + '/esp-idf-' + IDFZIPFileVersion + '.zip';
    IDFZIPFileName := ExpandConstant('{app}\releases\esp-idf-' + IDFZIPFileVersion + '.zip')
    if not FileExists(IDFZIPFileName) then
    begin
      ForceDirectories(ExpandConstant('{app}\releases'))
      Log('Adding download: ' + Url + ', mirror: ' + MirrorUrl + ', destination: ' + IDFZIPFileName);
      idpAddFile(Url, IDFZIPFileName);
      idpAddMirror(Url, MirrorUrl);
    end else begin
      Log(IDFZIPFileName + ' already exists')
    end;
  end;
end;

procedure RemoveAlternatesFile(Path: String);
begin
  Log('Removing ' + Path);
  DeleteFile(Path);
end;

{
  Replacement of the '--dissociate' flag of 'git clone', to support older versions of Git.
  '--reference' is supported for submodules since git 2.12, but '--dissociate' only from 2.18.
}
procedure GitRepoDissociate(Path: String);
var
  CmdLine: String;
begin
  CmdLine := GitExecutablePath + ' -C ' + Path + ' repack -d -a'
  DoCmdlineInstall('Finishing ESP-IDF installation', 'Re-packing the repository', CmdLine);
  CmdLine := GitExecutablePath + ' -C ' + Path + ' submodule foreach git repack -d -a'
  DoCmdlineInstall('Finishing ESP-IDF installation', 'Re-packing the submodules', CmdLine);

  FindFileRecursive(Path + '\.git', 'alternates', @RemoveAlternatesFile);
end;

{
  Run git config fileMode is repairing problem when git repo was zipped on Linux and extracted on Windows.
  The repo and submodules are marked as dirty which confuses users that fresh installation already contains changes.
  More information: https://mirrors.edge.kernel.org/pub/software/scm/git/docs/git-config.html
}
procedure GitRepoFixFileMode(Path: String);
var
  CmdLine: String;
begin
  CmdLine := GitExecutablePath + ' -C ' + Path + ' config --local core.fileMode false';
  Log('Setting core.fileMode on repository: ' + CmdLine);
  DoCmdlineInstall('Finishing ESP-IDF installation', 'Updating fileMode', CmdLine);

  Log('Setting core.fileMode on repository for submodules: ' + CmdLine);
  CmdLine := GitExecutablePath + ' -C ' + Path + ' submodule foreach --recursive git config --local core.fileMode false';
  DoCmdlineInstall('Finishing ESP-IDF installation', 'Updating fileMode in submodules', CmdLine);
end;

{ Run git reset --hard in the repo and in the submodules, to fix the newlines. }
procedure GitRepoFixNewlines(Path: String);
var
  CmdLine: String;
begin
  CmdLine := GitExecutablePath + ' -C ' + Path + ' reset --hard';
  Log('Resetting the repository: ' + CmdLine);
  DoCmdlineInstall('Finishing ESP-IDF installation', 'Updating newlines', CmdLine);

  Log('Resetting the submodules: ' + CmdLine);
  CmdLine := GitExecutablePath + ' -C ' + Path + ' submodule foreach git reset --hard';
  DoCmdlineInstall('Finishing ESP-IDF installation', 'Updating newlines in submodules', CmdLine);
end;

{
  There are 3 possible ways how an ESP-IDF copy can be obtained:
  - Download the .zip archive with submodules included, extract to destination directory,
    then do 'git reset --hard' and 'git submodule foreach git reset --hard' to correct for
    possibly different newlines. This is done for release versions.
  - Do a git clone of the Github repository into the destination directory.
    This is done for the master branch.
  - Download the .zip archive of a "close enough" release version, extract into a temporary
    directory. Then do a git clone of the Github repository, using the temporary directory
    as a '--reference'. This is done for other versions (such as release branches).
}

procedure IDFDownload();
var
  CmdLine: String;
  IDFTempPath: String;
  IDFPath: String;
  NeedToClone: Boolean;

begin
  IDFPath := IDFDownloadPath;
  { If there is a release archive to download, IDFZIPFileName and IDFZIPFileVersion will be set.
    See GetIDFZIPFileVersion function.
  }

  if IDFZIPFileName <> '' then
  begin
    if IDFZIPFileVersion <> IDFDownloadVersion then
    begin
      { The version of .zip file downloaded is not the same as the version the user has requested.
        Will use 'git clone --reference' to obtain the correct version, using the contents
        of the .zip file as reference.
      }
      NeedToClone := True;
    end;

    ExtractTemporaryFile('7za.exe')
    CmdLine := ExpandConstant('{tmp}\7za.exe x -o' + ExpandConstant('{tmp}') + ' -r -aoa "' + IDFZIPFileName + '"');
    IDFTempPath := ExpandConstant('{tmp}\esp-idf-') + IDFZIPFileVersion;
    Log('Extracting ESP-IDF reference repository: ' + CmdLine);
    Log('Reference repository path: ' + IDFTempPath);
    DoCmdlineInstall('Extracting ESP-IDF', 'Setting up reference repository', CmdLine);
  end else begin
    { IDFZIPFileName is not set, meaning that we will rely on 'git clone'. }
    NeedToClone := True;
    Log('Not .zip release archive. Will do full clone.');
  end;

  if NeedToClone then
  begin
    CmdLine := GitExecutablePath + ' clone --recursive --progress -b ' + IDFDownloadVersion;

    if IDFTempPath <> '' then
      CmdLine := CmdLine + ' --reference ' + IDFTempPath;

    CmdLine := CmdLine + ' https://github.com/espressif/esp-idf.git ' + IDFPath;
    Log('Cloning IDF: ' + CmdLine);
    DoCmdlineInstall('Downloading ESP-IDF', 'Using git to clone ESP-IDF repository', CmdLine);

    if IDFTempPath <> '' then
      GitRepoDissociate(IDFPath);

  end else begin
    Log('Copying ' + IDFTempPath + ' to ' + IDFPath);
    if DirExists(IDFPath) then
    begin
      if not DirIsEmpty(IDFPath) then
      begin
        MsgBox('Destination directory exists and is not empty: ' + IDFPath, mbError, MB_OK);
        RaiseException('Failed to copy ESP-IDF')
      end;
    end;
    { If cmd.exe command argument starts with a quote, the first and last quote chars in the command
      will be removed by cmd.exe.
      Keys explanation: /s+/e includes all subdirectories, /i assumes that destination is a directory,
      /h copies hidden files, /q disables file name logging (making copying faster!)
    }
    CmdLine := ExpandConstant('cmd.exe /c ""xcopy" /s /e /i /h /q "' + IDFTempPath + '" "' + IDFPath + '""');
    DoCmdlineInstall('Extracting ESP-IDF', 'Copying ESP-IDF into the destination directory', CmdLine);
    GitRepoFixFileMode(IDFPath);
    GitRepoFixNewlines(IDFPath);
    DelTree(IDFTempPath, True, True, True);
  end;
end;

{ ------------------------------ IDF Tools setup, Python environment setup ------------------------------ }

function UseBundledIDFToolsPy(Version: String) : Boolean;
begin
  Result := False;
  { Use bundled copy of idf_tools.py, as the copy shipped with these IDF versions can not work due to
    the --no-site-packages bug.
  }
  if (Version = 'v4.0') or (Version = 'v3.3.1') then
  begin
    Log('UseBundledIDFToolsPy: version=' + Version + ', using bundled idf_tools.py');
    Result := True;
  end;
end;

procedure IDFToolsSetup();
var
  CmdLine: String;
  IDFPath: String;
  IDFToolsPyPath: String;
  IDFToolsPyCmd: String;
  BundledIDFToolsPyPath: String;
  JSONArg: String;
begin
  IDFPath := GetIDFPath('');
  IDFToolsPyPath := IDFPath + '\tools\idf_tools.py';
  BundledIDFToolsPyPath := ExpandConstant('{app}\idf_tools_fallback.py');
  JSONArg := '';

  if FileExists(IDFToolsPyPath) then
  begin
    Log('idf_tools.py exists in IDF directory');
    if UseBundledIDFToolsPy(IDFDownloadVersion) then
    begin
      Log('Using the bundled idf_tools.py copy');
      IDFToolsPyCmd := BundledIDFToolsPyPath;
    end else begin
      IDFToolsPyCmd := IDFToolsPyPath;
    end;
  end else begin
    Log('idf_tools.py does not exist in IDF directory, using a fallback version');
    IDFToolsPyCmd := BundledIDFToolsPyPath;
    JSONArg := ExpandConstant('--tools "{app}\tools_fallback.json"');
  end;

  { IDFPath not quoted, as it can not contain spaces }
  IDFToolsPyCmd := PythonExecutablePath + ' "' + IDFToolsPyCmd + '" --idf-path ' + IDFPath + JSONArg;

  SetEnvironmentVariable('PYTHONUNBUFFERED', '1')

  Log('idf_tools.py command: ' + IDFToolsPyCmd);
  CmdLine := IDFToolsPyCmd + ' install';
  Log('Installing tools:' + CmdLine);
  DoCmdlineInstall('Installing ESP-IDF tools', '', CmdLine);

  CmdLine := IDFToolsPyCmd + ' install-python-env';
  Log('Installing Python environment:' + CmdLine);
  DoCmdlineInstall('Installing Python environment', '', CmdLine);
end;

{ Find Major and Minor version in esp_idf_version.h file. }
function GetIDFVersionFromHeaderFile():String;
var
  HeaderFileName: String;
  HeaderLines: TArrayOfString;
  LineIndex: Integer;
  LineCount: Longint;
  Line: String;
  MajorVersion: String;
  MinorVersion: String;
begin
  HeaderFileName := GetIDFPath('') + '\components\esp_common\include\esp_idf_version.h';
  if (not FileExists(HeaderFileName)) then begin
    Result := '';
    Exit;
  end;

  LoadStringsFromFile(HeaderFileName, HeaderLines);
  LineCount := GetArrayLength(HeaderLines);
  for LineIndex := 0 to LineCount - 1 do begin
    Line := HeaderLines[LineIndex];
    if (pos('define ESP_IDF_VERSION_MAJOR', Line) > 0) then begin
      Delete(Line, 1, 29);
      MajorVersion := Trim(Line);
    end else if (pos('define ESP_IDF_VERSION_MINOR', Line) > 0) then begin
      Delete(Line, 1, 29);
      MinorVersion := Trim(Line);
      Result := MajorVersion + '.' + MinorVersion;
      Exit;
    end
  end;
end;

{ ------------------------------ Start menu shortcut ------------------------------ }

procedure CreateIDFCommandPromptShortcut(LnkString: String);
var
  Destination: String;
  Description: String;
  VersionIndex: Integer;
  MajorString: String;
  MinorString: String;
  DotIndex: Integer;
  IDFVersionString: String;
  PythonVirtualEnvPath: String;
  Command: String;
begin
  ForceDirectories(ExpandConstant(LnkString));
  Destination := ExpandConstant(LnkString + '\{#IDFCmdExeShortcutFile}');
  Description := '{#IDFCmdExeShortcutDescription}';

  IDFVersionString := IDFDownloadVersion;
  { Transform version vx.y or release/vx.y to x.y }
  VersionIndex := pos('v', IDFVersionString);
  if (VersionIndex > 0) then begin
    Delete(IDFVersionString, 1, VersionIndex);
  end;

  { Transform version x.y.z to x.y }
  DotIndex := pos('.', IDFVersionString);
  if (DotIndex > 0) then begin
    MajorString := Copy(IDFVersionString, 1, DotIndex - 1);
    Delete(IDFVersionString, 1, DotIndex);
    { Trim trailing version numbers. }
    DotIndex := pos('.', IDFVersionString);
    if (DotIndex > 0) then begin
      MinorString := Copy(IDFVersionString, 1, DotIndex - 1);
      IDFVersionString := MajorString + '.' + MinorString;
    end else begin
     IDFVersionString :=  MajorString + '.' + IDFVersionString;
    end;
  end;

  { Transform master to x.y }
  if (IDFVersionString = 'master') then begin
    IDFVersionString := GetIDFVersionFromHeaderFile();
  end;

  { The links should contain reference to Python vitual env }
  PythonVirtualEnvPath := ExpandConstant('{app}\python_env\idf') + IDFVersionString + '_py' + PythonVersion + '_env\Scripts';

  { Fallback in case of not existing environment. }
  if (not FileExists(PythonVirtualEnvPath + '\python.exe')) then begin
    PythonVirtualEnvPath := PythonPath;
  end;

  { If cmd.exe command argument starts with a quote, the first and last quote chars in the command
    will be removed by cmd.exe; each argument needs to be surrounded by quotes as well. }
  Command := ExpandConstant('/k ""{app}\idf_cmd_init.bat" "') + PythonVirtualEnvPath + '" "' + GitPath + '""';
  Log('CreateShellLink Destination=' + Destination + ' Description=' + Description + ' Command=' + Command)
  try
    CreateShellLink(
      Destination,
      Description,
      'cmd.exe',
      Command,
      GetIDFPath(''),
      '', 0, SW_SHOWNORMAL);
  except
    MsgBox('Failed to create the Start menu shortcut: ' + Destination, mbError, MB_OK);
    RaiseException('Failed to create the shortcut');
  end;
end;


{ ------------------------------ WD exclusion registration ------------------------------ }

procedure RegisterIDFToolsExecutablesInWD();
var
  CmdLine: String;
begin
  CmdLine := ExpandConstant('powershell -ExecutionPolicy ByPass -File "{app}\dist\tools_WD_excl.ps1" -AddExclPath "{app}\*.exe"');
  Log('Registering IDF Tools executables in Windows Defender: ' + CmdLine);
  DoCmdlineInstall('Finishing ESP-IDF installation', 'Registering IDF Tools executables in Windows Defender', CmdLine);
end;



<event('CurPageChanged')>
procedure CheckWinDefenderAvailable(CurPageID: Integer);
var
  x: Integer;
begin
  if CurPageID = wpSelectTasks then
  begin
    { WD registration checkbox is identified by 'Windows Defender' substring anywhere in its caption.
      Please, keep this in mind when making changes }
    for x:=0 to (WizardForm.TasksList.Items.Count-1) do
    begin
      if Pos('Windows Defender',  WizardForm.TasksList.ItemCaption[x]) > 0 then
      begin
        WizardForm.TasksList.ItemEnabled[x] := isWindowsDefenderEnabled;
        WizardForm.TasksList.Checked[x] := isWindowsDefenderEnabled;
        break;
      end;
    end;
  end;
end;