/*
 * bridge_request.prg - FiveNode
 *
 * Copyright (c) 2026 Charles KWON ( Charles KWON Ohjun, charleskwonohjun@gmail.com )
 * All rights reserved.
 */

// bridge_request.prg
// AP_* function reimplementation - 100% identical function names/signatures

// ── Request functions ──

FUNCTION AP_METHOD()
RETURN ctx_get( "method", "GET" )

FUNCTION AP_FILENAME()
RETURN ctx_get( "filename", "" )

FUNCTION AP_ARGS()
RETURN ctx_get( "query_string", "" )

FUNCTION AP_USERIP()
RETURN ctx_get( "remote_ip", "127.0.0.1" )

FUNCTION AP_BODY()
RETURN ctx_get( "body", "" )

FUNCTION AP_GETBODY()
RETURN ctx_get( "body", "" )

FUNCTION AP_GETENV( cVarName )

   LOCAL hEnv := ctx_get( "env", { => } )

   IF hb_HHasKey( hEnv, Upper( cVarName ) )
      RETURN hEnv[ Upper( cVarName ) ]
   ENDIF

RETURN hb_GetEnv( cVarName, "" )

// ── Headers In ──

FUNCTION AP_HEADERSIN()
RETURN ctx_get( "headers_in", { => } )

FUNCTION AP_HEADERSINCOUNT()
RETURN Len( ctx_get( "headers_in", { => } ) )

FUNCTION AP_HEADERSINKEY( n )

   LOCAL hHeaders := ctx_get( "headers_in", { => } )

   IF n >= 1 .AND. n <= Len( hHeaders )
      RETURN hb_HKeyAt( hHeaders, n )
   ENDIF

RETURN ""

FUNCTION AP_HEADERSINVAL( n )

   LOCAL hHeaders := ctx_get( "headers_in", { => } )

   IF n >= 1 .AND. n <= Len( hHeaders )
      RETURN hb_HValueAt( hHeaders, n )
   ENDIF

RETURN ""

// ── Headers Out ──

FUNCTION AP_HEADERSOUT()
RETURN ctx_get( "headers_out", { => } )

FUNCTION AP_HEADERSOUTCOUNT()
RETURN Len( ctx_get( "headers_out", { => } ) )

FUNCTION AP_HEADERSOUTKEY( n )

   LOCAL hHeaders := ctx_get( "headers_out", { => } )

   IF n >= 1 .AND. n <= Len( hHeaders )
      RETURN hb_HKeyAt( hHeaders, n )
   ENDIF

RETURN ""

FUNCTION AP_HEADERSOUTVAL( n )

   LOCAL hHeaders := ctx_get( "headers_out", { => } )

   IF n >= 1 .AND. n <= Len( hHeaders )
      RETURN hb_HValueAt( hHeaders, n )
   ENDIF

RETURN ""

FUNCTION AP_HEADERSOUTSET( cKey, cValue )

   LOCAL hHeaders := ctx_get( "headers_out", { => } )

   hHeaders[ cKey ] := cValue
   ctx_set( "headers_out", hHeaders )

RETURN NIL

FUNCTION AP_SETCONTENTTYPE( cType )
RETURN AP_HEADERSOUTSET( "Content-Type", cType )

// ── Output ──

FUNCTION AP_RPUTS( ... )

   LOCAL n, u

   FOR n := 1 TO PCount()
      u := PValue( n )
      IF ValType( u ) == "C"
         bridge_output_append( u )
      ELSE
         bridge_output_append( fn_ValToChar( u ) )
      ENDIF
   NEXT

RETURN NIL

FUNCTION AP_ECHO( ... )

   LOCAL n, u

   FOR n := 1 TO PCount()
      u := PValue( n )
      IF ValType( u ) == "C"
         bridge_output_append( u )
      ELSEIF ValType( u ) != "U"
         bridge_output_append( fn_ValToChar( u ) )
      ENDIF
      IF n < PCount()
         bridge_output_append( " " )
      ENDIF
   NEXT

RETURN NIL

// ── Parameter Parsing ──

FUNCTION AP_GetPairs( lUrlDecode )

   LOCAL cArgs, aParams, aPair, hResult, cParam

   hb_default( @lUrlDecode, .T. )
   hResult := { => }
   cArgs := AP_ARGS()

   IF ! Empty( cArgs )
      aParams := hb_ATokens( cArgs, "&" )
      FOR EACH cParam IN aParams
         aPair := hb_ATokens( cParam, "=" )
         IF Len( aPair ) == 2
            hResult[ aPair[ 1 ] ] := iif( lUrlDecode, hb_UrlDecode( aPair[ 2 ] ), aPair[ 2 ] )
         ELSEIF Len( aPair ) == 1
            hResult[ aPair[ 1 ] ] := ""
         ENDIF
      NEXT
   ENDIF

RETURN hResult

FUNCTION AP_PostPairs( lUrlDecode )

   LOCAL cBody, aParams, aPair, hResult, cParam

   hb_default( @lUrlDecode, .T. )
   hResult := { => }
   cBody := AP_BODY()

   IF ! Empty( cBody )
      aParams := hb_ATokens( cBody, "&" )
      FOR EACH cParam IN aParams
         aPair := hb_ATokens( cParam, "=" )
         IF Len( aPair ) == 2
            hResult[ aPair[ 1 ] ] := iif( lUrlDecode, hb_UrlDecode( aPair[ 2 ] ), aPair[ 2 ] )
         ELSEIF Len( aPair ) == 1
            hResult[ aPair[ 1 ] ] := ""
         ENDIF
      NEXT
   ENDIF

RETURN hResult

// ── URL decode ──

FUNCTION hb_UrlDecode( cString )

   LOCAL cResult := "", i, c

   cString := StrTran( cString, "+", " " )
   i := 1

   DO WHILE i <= Len( cString )
      c := SubStr( cString, i, 1 )
      IF c == "%" .AND. i + 2 <= Len( cString )
         cResult += Chr( hb_HexToNum( SubStr( cString, i + 1, 2 ) ) )
         i += 3
      ELSE
         cResult += c
         i++
      ENDIF
   ENDDO

RETURN cResult

// ── Path/URL ──

FUNCTION fn_PathUrl()
RETURN ctx_get( "uri", "/" )

FUNCTION fn_PathBase( cDirFile )

   LOCAL cRoot := ctx_get( "document_root", "." )

   IF cDirFile != NIL
      RETURN cRoot + "/" + cDirFile
   ENDIF

RETURN cRoot

FUNCTION fn_Include( cFile )
RETURN hb_MemoRead( fn_PathBase( cFile ) )

FUNCTION fn_GetUri()

   LOCAL cScheme := iif( ctx_get( "https", .F. ), "https", "http" )
   LOCAL cHost := ""
   LOCAL hHeaders := AP_HEADERSIN()

   IF hb_HHasKey( hHeaders, "Host" )
      cHost := hHeaders[ "Host" ]
   ENDIF

RETURN cScheme + "://" + cHost + ctx_get( "uri", "/" )

FUNCTION fn_Redirect( cUrl )

   AP_HEADERSOUTSET( "Location", cUrl )
   ctx_set( "status", 302 )

RETURN NIL

// ── Data Conversion ──

FUNCTION fn_ValToChar( u )

   LOCAL cType := ValType( u )

   SWITCH cType
   CASE "C" ; RETURN u
   CASE "N" ; RETURN hb_ntos( u )
   CASE "D" ; RETURN DToC( u )
   CASE "L" ; RETURN iif( u, ".T.", ".F." )
   CASE "U" ; RETURN "NIL"
   CASE "A" ; RETURN hb_jsonEncode( u )
   CASE "H" ; RETURN hb_jsonEncode( u )
   CASE "T" ; RETURN hb_TToC( u )
   ENDSWITCH

RETURN "(" + cType + ")"

// ctx_get / ctx_set are defined as PUBLIC in bridge_context.prg

// -- mod_harbour compatibility wrappers --

FUNCTION MH_PathUrl()
RETURN fn_PathUrl()

FUNCTION MH_PathBase( cDirFile )
RETURN fn_PathBase( cDirFile )

FUNCTION MH_Include( cFile )
RETURN fn_Include( cFile )

FUNCTION mh_GetUri()
RETURN fn_GetUri()

FUNCTION mh_Redirect( cUrl )
RETURN fn_Redirect( cUrl )

FUNCTION MH_ValToChar( u )
RETURN fn_ValToChar( u )

// ── JSON Response helpers ──

FUNCTION AP_JSONRESPONSE( xData, nStatus )

   IF nStatus != NIL
      ctx_set( "status", nStatus )
   ENDIF

   AP_SETCONTENTTYPE( "application/json" )
   AP_RPUTS( hb_jsonEncode( xData ) )

RETURN NIL

FUNCTION AP_SETSTATUS( nStatus )

   ctx_set( "status", nStatus )

RETURN NIL

// ── Auth (read-only from .prg, set by Node.js only) ──

FUNCTION fn_Auth()

   LOCAL cAuth := _AUTH_GET()
   LOCAL hAuth

   IF Empty( cAuth )
      RETURN { "authenticated" => .F. }
   ENDIF

   hb_jsonDecode( cAuth, @hAuth )

   IF ValType( hAuth ) != "H"
      RETURN { "authenticated" => .F. }
   ENDIF

RETURN hAuth

FUNCTION fn_IsAuth()
RETURN fn_HGetDef( fn_Auth(), "authenticated", .F. )

FUNCTION fn_AuthUser()
RETURN fn_HGetDef( fn_Auth(), "user", "" )

FUNCTION fn_AuthRole()
RETURN fn_HGetDef( fn_Auth(), "role", "" )

// ── Hash helper ──

FUNCTION fn_HGetDef( hHash, cKey, xDefault )
RETURN hb_HGetDef( hHash, cKey, xDefault )

// ── JSON Body helper ──

FUNCTION AP_JSONBODY()

   LOCAL cBody := AP_BODY()
   LOCAL xResult

   IF ! Empty( cBody )
      hb_jsonDecode( cBody, @xResult )
   ENDIF

RETURN xResult