; This file is included for both installer and uninstaller builds.
; Guard installer-only pages/functions to avoid "function not referenced" warnings
; when electron-builder compiles the standalone uninstaller.
!ifndef BUILD_UNINSTALLER
!include nsDialogs.nsh
!include LogicLib.nsh

; Directory page is a "parent folder" picker. When users browse to a new folder,
; NSIS will set $INSTDIR to exactly what they pick (without app sub-folder),
; and electron-builder later appends "\${APP_FILENAME}" before installation.
; Make this explicit on the directory page to reduce confusion.
!define /ifndef MUI_DIRECTORYPAGE_TEXT_TOP "请选择安装位置（将自动创建并使用“${APP_FILENAME}”子文件夹）。"
!define /ifndef MUI_DIRECTORYPAGE_TEXT_DESTINATION "安装位置："

Var WDA_InstallDirPage

!macro customPageAfterChangeDir
  ; Add a confirmation page after the directory picker so users clearly see
  ; the final install location (includes the app sub-folder).
  !ifdef allowToChangeInstallationDirectory
    Page custom WDA_InstallDirPageCreate WDA_InstallDirPageLeave
  !endif
!macroend

Function WDA_EnsureAppSubDir
  ; Normalize $INSTDIR to always end with "\${APP_FILENAME}" (avoid cluttering a parent folder).
  StrCpy $0 "$INSTDIR"

  ; Trim trailing "\" (except for drive root like "C:\").
  StrLen $1 "$0"
  ${If} $1 > 3
    StrCpy $2 "$0" 1 -1
    ${If} $2 == "\"
      IntOp $1 $1 - 1
      StrCpy $0 "$0" $1
    ${EndIf}
  ${EndIf}

  ; If already ends with APP_FILENAME, keep it.
  StrLen $3 "$0"
  StrLen $4 "${APP_FILENAME}"
  ${If} $3 >= $4
    IntOp $5 $3 - $4
    StrCpy $6 "$0" $4 $5
    ${If} $6 == "${APP_FILENAME}"
      StrCpy $INSTDIR "$0"
      Return
    ${EndIf}
  ${EndIf}

  ; Otherwise append the app folder name.
  StrCpy $INSTDIR "$0\${APP_FILENAME}"
FunctionEnd

Function WDA_InstallDirPageCreate
  Call WDA_EnsureAppSubDir

  nsDialogs::Create 1018
  Pop $WDA_InstallDirPage

  ${If} $WDA_InstallDirPage == error
    Abort
  ${EndIf}

  ${NSD_CreateLabel} 0u 0u 100% 24u "程序将安装到："
  Pop $0

  ${NSD_CreateLabel} 0u 22u 100% 24u "$INSTDIR"
  Pop $0

  ${NSD_CreateLabel} 0u 50u 100% 36u "为避免把文件直接安装到父目录，安装程序会自动创建“${APP_FILENAME}”子文件夹。"
  Pop $0

  nsDialogs::Show
FunctionEnd

Function WDA_InstallDirPageLeave
FunctionEnd

!endif