# -*- Tcl -*-
package require nx
package require nx::test

namespace import ::nx::*

Class create M {
  :method mfoo {} {puts [self proc]}
}
Class create M2
Class create C 
C create c1

#
# test mixin method
#
Test case mixin-method {
  ? {C info lookup method mixin} "::nsf::classes::nx::Class::mixin"
  ? {C mixin M} ::M
  ? {C info precedence} "::nx::Class ::nx::Object"
  ? {C mixin} "::M"
  ? {C info mixin classes} "::M"
  ? {c1 info precedence} "::M ::C ::nx::Object"
  ? {C mixin add M2} "::M2 ::M"
  ? {c1 info precedence} "::M2 ::M ::C ::nx::Object"
  ? {C mixin delete M2} "::M"
  ? {c1 info precedence} "::M ::C ::nx::Object"
  ? {C mixin delete M} ""
  ? {C info mixin classes} ""
  ? {C mixin ::M} "::M"
  ? {C mixin {}} ""
  ? {C info mixin classes} ""
}

#
# test nsf::mixin interface
#
Test case nsf-mixin {
  ? {::nsf::mixin C ::M} "::M"
  ? {C info mixin classes} "::M"
  ? {::nsf::mixin C ::M2} "::M2 ::M"
  ? {C info mixin classes} "::M2 ::M"
  ? {::nsf::mixin C ""} ""
  ? {C info mixin classes} ""
}

#
# per-object mixins
#
Test case per-object-mixin {
  ? {c1 info precedence} "::C ::nx::Object"
  ? {c1 mixin add M} ::M
  ? {::nsf::relation c1 object-mixin} ::M
  ? {catch {c1 mixin UNKNOWN}} 1
  ? {::nsf::relation c1 object-mixin} "::M"

  # add again the same mixin
  ? {c1 mixin add M} {::M}
  ? {c1 info precedence} "::M ::C ::nx::Object"
  ? {c1 mixin add M2} "::M2 ::M"
  ? {c1 info precedence} "::M2 ::M ::C ::nx::Object"
  ? {c1 mixin delete M} "::M2"
  ? {c1 info precedence} "::M2 ::C ::nx::Object"
  ? {c1 mixin delete M2} ""
  ? {c1 info precedence} "::C ::nx::Object"
}

#
# adding, removing per-object mixins for classes through relation
# "object-mixin"
#
Test case object-mixin-relation {
  ? {::nsf::relation C object-mixin M} ::M
  ? {C info precedence} "::M ::nx::Class ::nx::Object"
  ? {C class info mixin classes} "::M"
  ? {::nsf::relation C object-mixin ""} ""
  ? {C info precedence} "::nx::Class ::nx::Object"
}

#
# adding, removing per-object mixins for classes through slot
# "object-mixin"
#
 # C object-mixin M
 # ? {C info precedence} "::M ::nx::Class ::nx::Object"
 # ? {C class info mixin classes} "::M"
 # C object-mixin ""
 # ? {C info precedence} "::nx::Class ::nx::Object"

#
# add and remove class mixin for classes via modifier "class" and
# "mixin"
#
Test case class+mixin {
  ? {C class mixin M} ::M
  ? {C info precedence} "::M ::nx::Class ::nx::Object"
  ? {C class info mixin classes} "::M"
  ? {C class mixin ""} ""
  ? {C info precedence} "::nx::Class ::nx::Object"
}

#
#  add and remove class mixin for classes via class mixin add
#
Test case class+mixin-add {
  ? {C class mixin add M} ::M
  ? {C info precedence} "::M ::nx::Class ::nx::Object"
  ? {C class info mixin classes} "::M"
  ? {C class mixin ""} ""
  ? {C info precedence} "::nx::Class ::nx::Object"
  
  ? {C class mixin add M} ::M
  ? {C info precedence} "::M ::nx::Class ::nx::Object"
  ? {::nsf::relation C object-mixin} ::M
  ? {catch {C class mixin add UNKNOWN}} 1
  ? {::nsf::relation C object-mixin} "::M"
  ? {C class mixin ""} ""
  ? {C info precedence} "::nx::Class ::nx::Object"

  ? {C class mixin M} ::M
  ? {C info precedence} "::M ::nx::Class ::nx::Object"

  # forwarder with 0 arguments + flag
  ? {C class mixin} "::M"
}



Test case mixin-add {

  Class create M1 {
    :method mfoo {} {puts [current method]}
  }
  Class create M11
  Class create C1 

  ? {C1 info lookup method mixin} "::nsf::classes::nx::Class::mixin"
  C1 class mixin M1
  ? {C1 info precedence} "::M1 ::nx::Class ::nx::Object"
  C1 create c11
  ? {c11 info precedence} "::C1 ::nx::Object"
  C1 class mixin add M11
  ? {C1 info precedence} "::M11 ::M1 ::nx::Class ::nx::Object"
  Object create o -mixin M1
  ? {o info precedence} "::M1 ::nx::Object"

  Class create O 
  O class mixin M1
  ? {O info precedence} "::M1 ::nx::Class ::nx::Object"
  Class create O -object-mixin M1
  ? {O info precedence} "::M1 ::nx::Class ::nx::Object"
}

Test parameter count 3
Test case "filter-and-creation" {
  Class create Foo {
    :public method myfilter {args} {
      set i [::incr ::count]
      set s [self]
      set m [current calledmethod]
      #puts stderr "$i: $s.$m"
      #puts stderr "$i: procsearch before [$s procsearch info]"
      set r [next]
      #puts stderr "$i: $s.$m got ($r)"
      #puts stderr "$i: $s.$m procsearch after [$s info lookup method info]"
      return $r
    }
    # method for testing next to non-existing shadowed method
    :public method baz {} {next}
  }

  ? {Foo create ob} ::ob

  # make sure, no unknown handler exists
  #? {::ob info lookup method unknown} "::nsf::classes::nx::Object::unknown"
  ? {::ob info lookup method unknown} ""

  ? {ob bar} {::ob: unable to dispatch method 'bar'}
  ? {ob baz} {}

  # define a global unknown handler
  ::nx::Object protected method unknown {m args} {
    error "[::nsf::current object]: unable to dispatch method '$m'"
  }

  ? {ob bar} {::ob: unable to dispatch method 'bar'}
  ? {ob baz} {}

  Foo filter myfilter
  # create through filter
  ? {Foo create ob} ::ob

  # unknown through filter
  ? {ob bar1} {::ob: unable to dispatch method 'bar1'}
  ? {ob baz} {}

  # deactivate nx unknown handler in case it exists
  ::nx::Object method unknown {} {}

  # create through filter
  ? {Foo create ob2} ::ob2

  # unknown through filter
  ? {ob2 bar2} {::ob2: unable to dispatch method 'bar2'}
  ? {ob2 baz} {}

}

#
# Test the next-path with just intrinsic classes in cases where a
# method handle is used for method dispatch
#

nx::Test case intrinsic+method-handles {
  Class create A {:public method foo {} {return "A [next]"}}
  Class create B -superclass A {:public method foo {} {return "B [next]"}}
  Class create C -superclass B {:public method foo {} {return "C [next]"}}
  
  C create c1
  ? {c1 foo} "C B A "
  ? {c1 [C info method origin foo]} "C B A "
  ? {c1 [B info method origin foo]} "B A "
  ? {c1 [A info method origin foo]} "A "

  # documententing unwanted behavior
  ? {nsf::object::dispatch c1 foo} "C B A "
  ? {nsf::object::dispatch c1 [C info method origin foo]} "C C B A "
  ? {nsf::object::dispatch c1 [B info method origin foo]} "B C B A "
  ? {nsf::object::dispatch c1 [A info method origin foo]} "A C B A "    
}

#
# Test the next-path with mixin classes in cases where a
# method handle is used for method dispatch
#

nx::Test case mixins+method-handles {
  #
  # Just mixin classes
  #
  Class create A {:public method foo {} {return "A [next]"}}
  Class create B {:public method foo {} {return "B [next]"}}
  Class create C {:public method foo {} {return "C [next]"}}

  Class create X -mixin {C B A}
  X create c1
  ? {c1 foo} "C B A "
  ? {c1 [C info method origin foo]} "C B A "
  ? {c1 [B info method origin foo]} "B A "
  ? {c1 [A info method origin foo]} "A "
  
  #
  # Intrinsic classes and mixin classes
  #

  Class create Y {:public method foo {} {return "Y [next]"}}
  Class create Z -superclass Y {:public method foo {} {return "Z [next]"}}

  Z create c1 -mixin {C B A}
  ? {c1 foo} "C B A Z Y "
  ? {c1 [C info method origin foo]} "C B A Z Y "
  ? {c1 [B info method origin foo]} "B A Z Y "
  ? {c1 [A info method origin foo]} "A Z Y "
  ? {c1 [Z info method origin foo]} "Z Y "
  ? {c1 [Y info method origin foo]} "Y "

}