# MIT License
#
# Copyright The SCons Foundation
#
# 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.

"""Tool-specific initialization for jar.

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.
"""

from __future__ import annotations

import os

import SCons.Node
import SCons.Node.FS
import SCons.Subst
import SCons.Tool
import SCons.Util
import SCons.Warnings
from SCons.Node.FS import _my_normcase
from SCons.Tool.JavaCommon import get_java_install_dirs


def jarSources(target, source, env, for_signature) -> list[str]:
    """Only include sources that are not a manifest file."""
    try:
        env['JARCHDIR']
    except KeyError:
        jarchdir_set = False
    else:
        jarchdir_set = True
        jarchdir = env.subst('$JARCHDIR', target=target, source=source)
        if jarchdir:
            jarchdir = env.fs.Dir(jarchdir)
    result = []
    for src in source:
        contents = src.get_text_contents()
        if contents.startswith("Manifest-Version"):
            continue
        if jarchdir_set:
            _chdir = jarchdir
        else:
            try:
                _chdir = src.attributes.java_classdir
            except AttributeError:
                _chdir = None
        if _chdir:
            # If we are changing the dir with -C, then sources should
            # be relative to that directory.
            src = SCons.Subst.Literal(src.get_path(_chdir))
            result.append('-C')
            result.append(_chdir)
        result.append(src)
    return result

def jarManifest(target, source, env, for_signature):
    """Look in sources for a manifest file, if any."""
    for src in source:
        contents = src.get_text_contents()
        if contents.startswith("Manifest-Version"):
            return src
    return ''

def jarFlags(target, source, env, for_signature) -> str:
    """If we have a manifest, make sure that the 'm'
    flag is specified."""
    jarflags = env.subst('$JARFLAGS', target=target, source=source)
    for src in source:
        contents = src.get_text_contents()
        if contents.startswith("Manifest-Version"):
            if 'm' not in jarflags:
                return jarflags + 'm'
            break
    return jarflags

def Jar(env, target=None, source=[], *args, **kw):
    """The Jar Builder.

    This is a pseudo-Builder wrapper around the separate jar builders
    depending on whether the sources are a file list or a directory.
    """
    # TODO: W1113: Keyword argument before variable positional arguments list in the definition of Jar function
    # TODO: W0102: Dangerous default value [] as argument

    # jar target should not be a list so assume they passed
    # no target and want implicit target to be made and the arg
    # was actaully the list of sources
    if SCons.Util.is_List(target) and source == []:
        SCons.Warnings.warn(
            SCons.Warnings.SConsWarning,
            "Making implicit target jar file, and treating the list as sources"
        )
        source = target
        target = None

    # mutiple targets passed so build each target the same from the
    # same source
    #TODO Maybe this should only be done once, and the result copied
    #     for each target since it should result in the same?
    if SCons.Util.is_List(target) and SCons.Util.is_List(source):
        jars = []
        for single_target in target:
            jars += env.Jar(target=single_target, source=source, *args, **kw)
        return jars

    # they passed no target so make a target implicitly
    if target is None:
        try:
            # make target from the first source file
            target = os.path.splitext(str(source[0]))[0] + env.subst('$JARSUFFIX')
        except:
            # TODO: W0702: No exception type(s) specified
            # something strange is happening but attempt anyways
            SCons.Warnings.warn(
                SCons.Warnings.SConsWarning,
                "Could not make implicit target from sources, using directory"
            )
            target = os.path.basename(str(env.Dir('.'))) + env.subst('$JARSUFFIX')

    # make lists out of our target and sources
    if not SCons.Util.is_List(target):
        target = [target]
    if not SCons.Util.is_List(source):
        source = [source]

    # setup for checking through all the sources and handle accordingly
    java_class_suffix = env.subst('$JAVACLASSSUFFIX')
    java_suffix = env.subst('$JAVASUFFIX')
    target_nodes = []

    # function for determining what to do with a file and not a directory
    # if its already a class file then it can be used as a
    # source for jar, otherwise turn it into a class file then
    # return the source
    def file_to_class(src):
        if _my_normcase(str(src)).endswith(java_suffix):
            return env.JavaClassFile(source=src, *args, **kw)
        return [env.fs.File(src)]

    # function for calling the JavaClassDir builder if a directory is
    # passed as a source to Jar builder. The JavaClassDir builder will
    # return an empty list if there were no target classes built from
    # the directory, in this case assume the user wanted the directory
    # copied into the jar as is (it contains other files such as
    # resources or class files compiled from prior commands)
    # TODO: investigate the expexcted behavior for directories that
    #       have mixed content, such as Java files along side other files
    #       files.
    def dir_to_class(src):
        dir_targets = env.JavaClassDir(source=src, *args, **kw)
        if dir_targets == []:
            # no classes files could be built from the source dir
            # so pass the dir as is.
            return [env.fs.Dir(src)]
        return dir_targets

    # loop through the sources and handle each accordingly
    # the goal here is to get all the source files into a class
    # file or a directory that contains class files
    for src in SCons.Util.flatten(source):
        src = env.subst(src)
        if isinstance(src, SCons.Node.FS.Base):
            if isinstance(src, SCons.Node.FS.File):
                # found a file so make sure its a class file
                target_nodes.extend(file_to_class(src))
            else:
                # found a dir so get the class files out of it
                target_nodes.extend(dir_to_class(src))
        else:
            try:
                # source is string try to convert it to file
                target_nodes.extend(file_to_class(env.fs.File(src)))
                continue
            except:
                # TODO: W0702: No exception type(s) specified
                pass

            try:
                # source is string try to covnert it to dir
                target_nodes.extend(dir_to_class(env.fs.Dir(src)))
                continue
            except:
                # TODO: W0702: No exception type(s) specified
                pass

            SCons.Warnings.warn(
                SCons.Warnings.SConsWarning,
                ("File: " + str(src)
                + " could not be identified as File or Directory, skipping.")
            )

    # at this point all our sources have been converted to classes or
    # directories of class so pass it to the Jar builder
    return env.JarFile(target=target, source=target_nodes, *args, **kw)

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

    SCons.Tool.CreateJavaFileBuilder(env)
    SCons.Tool.CreateJavaClassFileBuilder(env)
    SCons.Tool.CreateJavaClassDirBuilder(env)

    env.AddMethod(Jar)

    if env['PLATFORM'] == 'win32':
        # Ensure that we have a proper path for jar
        paths = get_java_install_dirs('win32')
        jar = SCons.Tool.find_program_path(env, 'jar', default_paths=paths)
        if jar:
            jar_bin_dir = os.path.dirname(jar)
            env.AppendENVPath('PATH', jar_bin_dir)

    env['JAR'] = 'jar'
    env['JARFLAGS'] = SCons.Util.CLVar('cf')
    env['_JARFLAGS'] = jarFlags
    env['_JARMANIFEST'] = jarManifest
    env['_JARSOURCES'] = jarSources
    env['_JARCOM'] = '$JAR $_JARFLAGS $TARGET $_JARMANIFEST $_JARSOURCES'
    env['JARCOM'] = "${TEMPFILE('$_JARCOM','$JARCOMSTR')}"
    env['JARSUFFIX'] = '.jar'

def exists(env) -> bool:
    # As reported by Jan Nijtmans in issue #2730, the simple
    #    return env.Detect('jar')
    # doesn't always work during initialization. For now, we
    # stop trying to detect an executable (analogous to the
    # javac Builder).
    # TODO: Come up with a proper detect() routine...and enable it.
    return True

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