"""SCons.Tool.pdftex

Tool-specific initialization for pdftex.
Generates .pdf files from .tex files

There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.

"""

#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#

__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

import os
import SCons.Action
import SCons.Util
import SCons.Tool.tex

PDFTeXAction = None

# This action might be needed more than once if we are dealing with
# labels and bibtex.
PDFLaTeXAction = None

def PDFLaTeXAuxAction(target = None, source= None, env=None):
    result = SCons.Tool.tex.InternalLaTeXAuxAction( PDFLaTeXAction, target, source, env )
    return result

def PDFTeXLaTeXFunction(target = None, source= None, env=None):
    """A builder for TeX and LaTeX that scans the source file to
    decide the "flavor" of the source and then executes the appropriate
    program."""
    basedir = os.path.split(str(source[0]))[0]
    abspath = os.path.abspath(basedir)

    if SCons.Tool.tex.is_LaTeX(source,env,abspath):
        result = PDFLaTeXAuxAction(target,source,env)
        if result != 0:
            SCons.Tool.tex.check_file_error_message(env['PDFLATEX'])
    else:
        result = PDFTeXAction(target,source,env)
        if result != 0:
            SCons.Tool.tex.check_file_error_message(env['PDFTEX'])
    return result

PDFTeXLaTeXAction = None

def generate(env) -> None:
    """Add Builders and construction variables for pdftex to an Environment."""
    global PDFTeXAction
    if PDFTeXAction is None:
        PDFTeXAction = SCons.Action.Action('$PDFTEXCOM', '$PDFTEXCOMSTR')

    global PDFLaTeXAction
    if PDFLaTeXAction is None:
        PDFLaTeXAction = SCons.Action.Action("$PDFLATEXCOM", "$PDFLATEXCOMSTR")

    global PDFTeXLaTeXAction
    if PDFTeXLaTeXAction is None:
        PDFTeXLaTeXAction = SCons.Action.Action(PDFTeXLaTeXFunction,
                              strfunction=SCons.Tool.tex.TeXLaTeXStrFunction)

    env.AppendUnique(LATEXSUFFIXES=SCons.Tool.LaTeXSuffixes)

    from . import pdf
    pdf.generate(env)

    bld = env['BUILDERS']['PDF']
    bld.add_action('.tex', PDFTeXLaTeXAction)
    bld.add_emitter('.tex', SCons.Tool.tex.tex_pdf_emitter)

    # Add the epstopdf builder after the pdftex builder 
    # so pdftex is the default for no source suffix
    pdf.generate2(env)

    SCons.Tool.tex.generate_common(env)

def exists(env):
    SCons.Tool.tex.generate_darwin(env)
    return env.Detect('pdftex')

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