# MIT License
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# Copyright The SCons Foundation
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"""SCons.Tool.midl

Tool-specific initialization for midl (Microsoft IDL compiler).

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.

"""

import SCons.Action
import SCons.Builder
import SCons.Defaults
import SCons.Scanner.IDL
import SCons.Util

from SCons.Tool.MSCommon import msvc_setup_env_tool

tool_name = 'midl'


def midl_emitter(target, source, env):
    """Produces a list of outputs from the MIDL compiler"""
    base, _ = SCons.Util.splitext(str(target[0]))
    tlb = target[0]
    incl = base + '.h'
    interface = base + '_i.c'
    targets = [tlb, incl, interface]

    midlcom = env['MIDLCOM']

    if '/proxy' in midlcom:
        proxy = base + '_p.c'
        targets.append(proxy)
    if '/dlldata' in midlcom:
        dlldata = base + '_data.c'
        targets.append(dlldata)

    return targets, source


idl_scanner = SCons.Scanner.IDL.IDLScan()

midl_action = SCons.Action.Action('$MIDLCOM', '$MIDLCOMSTR')

midl_builder = SCons.Builder.Builder(action=midl_action,
                                     src_suffix='.idl',
                                     suffix='.tlb',
                                     emitter=midl_emitter,
                                     source_scanner=idl_scanner)


def generate(env) -> None:
    """Add Builders and construction variables for midl to an Environment."""

    env['MIDL'] = 'MIDL.EXE'
    env['MIDLFLAGS'] = SCons.Util.CLVar('/nologo')
    env['MIDLCOM'] = '$MIDL $MIDLFLAGS /tlb ${TARGETS[0]} /h ${TARGETS[1]} /iid ${TARGETS[2]} /proxy ${TARGETS[3]} /dlldata ${TARGETS[4]} $SOURCE 2> NUL'
    env['BUILDERS']['TypeLibrary'] = midl_builder


def exists(env):
    return msvc_setup_env_tool(env, tool=tool_name)

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