#
# Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
# Copyright (c) 2021 Dmitry Arkhipov (grisumbras@gmail.com)
#
# Distributed under the Boost Software License, Version 1.0. (See accompanying
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#
# Official repository: https://github.com/cppalliance/json
#


import "class" : new ;
import doxygen ;
import param ;
import path ;
import project ;
import property-set ;
import quickbook ;
import saxonhe ;
import sequence ;
import toolset ;
import type ;


.here  = [ path.make [ modules.binding $(__name__) ] ] ;
.here = $(.here:D) ;


rule reference ( target : sources * : requirements * : default-build *
    : usage-requirements * )
{
    param.handle-named-params
        sources requirements default-build usage-requirements ;

    local overrides = $(sources[1]) ;
    sources = $(sources[2-]) ;

    local project = [ project.current ] ;
    local target-dir = $(target:S=) ;
    target-dir = $(target-dir:B=_$(target-dir:B)-dir) ;

    # Generate doxygen configuration file from sources
    sources = [ sequence.transform fix-source $(project) : $(sources) ] ;
    doxyfile $(target-dir)/sources.dox
        : $(sources)
        : $(requirements)
          <doxygen:param>GENERATE_HTML=NO
          <doxygen:param>GENERATE_XML=YES
          <doxygen:param>XML_OUTPUT=$(target-dir)
        : $(default-build)
        ;
    $(project).mark-target-as-explicit $(target-dir)/sources.dox ;

    #--------------------------------------------------------------------------
    #
    # Invoke Doxygen to process the header files and produce the XML
    # containing the description of the C++ declarations and extracted
    # Javadoc comments.
    doxygen-xml-multifile $(target-dir)/stamp
        : $(target-dir)/sources.dox
        : $(requirements)
        : $(default-build)
        ;
    $(project).mark-target-as-explicit $(target-dir)/stamp ;


    # Adopt as a target index.xml which was created as a side-effect
    make-explicit $(target-dir)/index.xml $(project)
        : $(target-dir)/stamp
        : @docca.null-action
        ;

    #--------------------------------------------------------------------------
    #
    # Copy the project-specific config XSLT
    copy-xsl $(overrides) $(project) $(target-dir)/custom-overrides.xsl ;

    # Copy all the XSLT modules to the target directory.
    # Also, specify their dependencies.
    local src-dir = $(.here)/include/docca ;
    copy-xsl $(src-dir)/common.xsl             $(project) $(target-dir) ;
    copy-xsl $(src-dir)/base-config.xsl        $(project) $(target-dir) ;
    copy-xsl $(src-dir)/assemble-quickbook.xsl $(project) $(target-dir) ;

    copy-xsl $(src-dir)/base-extract-xml-pages.xsl $(project) $(target-dir)
        : common.xsl
        ;

    copy-xsl $(src-dir)/base-stage1.xsl $(project) $(target-dir)
        : common.xsl
        ;

    copy-xsl $(src-dir)/extract-xml-pages.xsl $(project) $(target-dir)
        : base-extract-xml-pages.xsl
          base-config.xsl
          custom-overrides.xsl
        ;

    copy-xsl $(src-dir)/stage1.xsl $(project) $(target-dir)
        : base-stage1.xsl
          base-config.xsl
          custom-overrides.xsl
        ;

    copy-xsl $(src-dir)/base-stage2.xsl $(project) $(target-dir)
        : common.xsl
        ;

    copy-xsl $(src-dir)/stage2.xsl $(project) $(target-dir)
        : base-stage2.xsl
          base-config.xsl
          custom-overrides.xsl
        ;

    #-------------------------------------------------------------------------------
    #
    # Run index.xml through the first transformation stage
    # (assembling and splitting the XML into page-specific files).
    #
    make-explicit $(target-dir)/xml-pages.xml $(project)
        : $(target-dir)/index.xml
          $(target-dir)/extract-xml-pages.xsl
        : @saxonhe.saxonhe
        ;

    # Adopt as a target xml-pages directory which was created as a side-effect
    make-explicit $(target-dir)/xml-pages $(project)
        : $(target-dir)/xml-pages.xml
        : @docca.null-action
        ;

    make-explicit $(target-dir)/stage1/results $(project)
        : $(target-dir)/xml-pages
          $(target-dir)/stage1.xsl
        : @saxonhe.saxonhe_dir
        : $(requirements)
        ;

    make-explicit $(target-dir)/stage2/results $(project)
        : $(target-dir)/stage1/results
          $(target-dir)/stage2.xsl
        : @saxonhe.saxonhe_dir
        : $(requirements)
        ;

    generate $(target)
        : $(target-dir)/xml-pages.xml
          $(target-dir)/assemble-quickbook.xsl

          # TODO: make this input to the XSLT somehow
          #       rather than relying on it being hard-coded
          #       in the XSLT (which it is!)
          $(target-dir)/stage2/results
        : <generating-rule>@docca.make-qbk
          $(requirements)
        : $(default-build)
        : $(usage-requirements)
        ;
}


rule make-qbk ( project name : property-set : sources * )
{
        local action-name = saxonhe.saxonhe ;
        local relevant = [ toolset.relevant $(action-name) ] ;
        local action = [
              new action $(sources)
            : $(action-name)
            : [ $(property-set).relevant $(relevant) ]
            ] ;
        local target = [
              new file-target $(name) exact
            : [ type.type $(name) ]
            : $(project)
            : $(action)
            ] ;
        local path = [ path.root $(name) [ $(target).path ] ] ;
        return [ property-set.create <include>$(path:D) ] $(target) ;
}


local rule copy-xsl ( source project target-or-dir : dependencies * )
{
    local target ;
    local dir ;
    if .xsl = $(target-or-dir:S)
    {
        dir = $(target-or-dir:D) ;
        target =  $(target-or-dir:D=) ;
    }
    else
    {
        dir = $(target-or-dir) ;
        target = $(source:D=) ;
    }

    make-explicit $(target:TD=$(dir)) $(project)
        : $(source)
        : @common.copy
        : <dependency>$(dependencies:TD=$(dir))
        ;
}


local rule make-explicit ( target project : sources * : make-rule + : reqs *
    : ureqs * )
{
    make $(target) : $(sources) : $(make-rule) : $(reqs) : $(ureqs) ;
    $(project).mark-target-as-explicit $(target) ;
}


local rule fix-source ( project path )
{
    # Unfortunately, rule doxygen.run was written with the assumption that
    # current project is located in the current directory (which is very likely
    # to not be the case). We have to convert paths into a form that is both
    # usable by doxygen and usable by b2 from the current project. This
    # effectively means absolute paths.
    #
    # NOTE: doxygen.run should really do this by itself.

    path = [ path.root $(path) [ $(project).location ] ] ;
    path = [ path.root $(path) [ path.pwd ] ] ;
    return $(path) ;
}


rule null-action
{
}