#!/usr/bin/env python3

import os
import sys
import shutil


"""Script to install 'AsciiDoc3'. Works with POSIX systems
   like Unix, GNU/Linux, and BSD ... Running with 'superuser'
   rights (root) required (sudo/su)!
   The new directories and executables will have permissions
   0o755, new files 0o644.
   Fat32, fat16, vfat formatted partitions do _NOT_
   support symlinks: So you better do not use them or add
   the files as hardlinks/file-copies manually.
   """

if os.name != 'posix':
    print("FATAL: platform is *not* POSIX!")
    sys.exit(1)

# copy files to '/usr/share/asciidoc3'
# except 'stylesheets -> /etc/asciidoc3/stylesheets'
# because symlink src has to exist before creating
if not os.access("/usr/share", os.F_OK | os.W_OK):
    print("no access to /usr/share")
    print("are you root?")
    sys.exit(1)

if os.path.isdir("/usr/share/asciidoc3"):
    if not os.access("/usr/share/asciidoc3", os.F_OK | os.W_OK):
        print("no access to /usr/share/asciidoc3")
        sys.exit(1)
else:
    os.mkdir("/usr/share/asciidoc3")
os.chmod("/usr/share/asciidoc3", 0o755)
# '/usr/share/asciidoc3' exists and is writable

# copy asciidoc3api.py
try:
    shutil.copyfile("asciidoc3api.py", "/usr/share/asciidoc3/asciidoc3api.py")
    os.chmod("/usr/share/asciidoc3/asciidoc3api.py", 0o644)
except (OSError, PermissionError):
    print("no access to /usr/share/asciidoc3")
    sys.exit(1)

# make subdirectories in '/usr/share/asciidoc3'
usr_sub = ("icons",
           "icons/callouts",
           "images",
           "javascripts")
try:
    for item in usr_sub:
        if not os.access("/usr/share/asciidoc3/"+item, os.F_OK):
            os.mkdir("/usr/share/asciidoc3/"+item+"/", 0o755)
except (OSError, PermissionError):
    print("no access to /usr/share/asciidoc3")
    sys.exit(1)

# copy files to '/usr/share/asciidoc3/icons'
icons_files = ("caution.png",
               "example.png",
               "home.png",
               "important.png",
               "next.png",
               "note.png",
               "prev.png",
               "README",
               "tip.png",
               "up.png",
               "warning.png")

try:
    for item in icons_files:
        shutil.copyfile("./images/icons/"+item, "/usr/share/asciidoc3/icons/"+item)
        os.chmod("/usr/share/asciidoc3/icons/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /usr/share/asciidoc3")
    sys.exit(1)

# copy files to '/usr/share/asciidoc3/icons/callouts'
callout_files = ("10.png",
                 "11.png",
                 "12.png",
                 "13.png",
                 "14.png",
                 "15.png",
                 "1.png",
                 "2.png",
                 "3.png",
                 "4.png",
                 "5.png",
                 "6.png",
                 "7.png",
                 "8.png",
                 "9.png")

try:
    for item in callout_files:
        shutil.copyfile("images/icons/callouts/"+item, "/usr/share/asciidoc3/icons/callouts/"+item)
        os.chmod("/usr/share/asciidoc3/icons/callouts/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /usr/share/asciidoc3")
    sys.exit(1)

# make symlink src -> dst: 'icons' -> '../icons'
try:
    if os.access("/usr/share/asciidoc3/images/icons", os.F_OK | os.R_OK | os.W_OK):
        os.remove("/usr/share/asciidoc3/images/icons")
    os.symlink("../icons", "/usr/share/asciidoc3/images/icons")
    os.chmod("/usr/share/asciidoc3/images/icons", 0o755)
except (OSError, PermissionError):
    print("no access to /usr/share/asciidoc3")
    sys.exit(1)

# copy files to '/usr/share/asciidoc3/javascripts'
js_files = ("asciidoc3.js",
            "ASCIIMathML.js",
            "LaTeXMathML.js",
            "slidy.js",
            "toc.js")

try:
    for item in js_files:
        shutil.copyfile("./javascripts/"+item, "/usr/share/asciidoc3/javascripts/"+item)
        os.chmod("/usr/share/asciidoc3/javascripts/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /usr/share/asciidoc3")
    sys.exit(1)
# End /usr/share/asciidoc3 (except symlink '/usr/share/asciidoc/stylesheets')


# asciidoc3.py -> /usr/bin/asciidoc3
if not os.access("/usr/bin/", os.F_OK | os.W_OK):
    print("No access to '/usr/bin'! Try sudo/su")
    sys.exit(1)

try:
    shutil.copyfile("asciidoc3.py", "/usr/bin/asciidoc3")
    os.chmod("/usr/bin/asciidoc3", 0o755)
except (OSError, PermissionError):
    print("No access to '/usr/bin'! Try sudo/su")
    sys.exit(1)
# End /usr/bin/asciidoc3

# directory /etc/asciidoc3/
if not os.access("/etc", os.F_OK | os.W_OK):
    print("no access to /etc")
    sys.exit(1)

if os.path.isdir("/etc/asciidoc3"):
    if not os.access("/etc/asciidoc3", os.F_OK | os.W_OK):
        print("no access to /etc/asciidoc3")
        sys.exit(1)
else:
    os.mkdir("/etc/asciidoc3/")
os.chmod("/etc/asciidoc3/", 0o755)
# 'etc/asciidoc3' exists and is writable

# copy files to '/etc/asciidoc3'
etc_files = ("asciidoc3.conf",
             "docbook45.conf",
             "help.conf",
             "html4.conf",
             "html5.conf",
             "lang-cs.conf",
             "lang-de.conf",
             "lang-el.conf",
             "lang-en.conf",
             "lang-es.conf",
             "lang-fr.conf",
             "lang-hu.conf",
             "lang-it.conf",
             "lang-nl.conf",
             "lang-pt-BR.conf",
             "lang-ro.conf",
             "lang-ru.conf",
             "lang-uk.conf",
             "latex.conf",
             "slidy.conf",
             "text.conf",
             "xhtml11.conf")

try:
    for item in etc_files:
        shutil.copyfile(item, "/etc/asciidoc3/"+item)
        os.chmod("/etc/asciidoc3/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# make subdirectories in '/etc/asciidoc3'
etc_sub = ("dblatex",
           "docbook-xsl",
           "filters",
           "filters/code",
           "filters/graphviz",
           "filters/latex",
           "filters/music",
           "filters/source",
           "stylesheets",
           "themes",
           "themes/flask",
           "themes/volnitsky")
try:
    for item in etc_sub:
        if not os.access("/etc/asciidoc3/"+item, os.F_OK):
            os.mkdir("/etc/asciidoc3/"+item+"/", 0o755)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# make symlink: images -> /usr/share/asciidoc3/images
try:
    if os.access("/etc/asciidoc3/images", os.F_OK | os.R_OK | os.W_OK):
        os.remove("/etc/asciidoc3/images")
    os.symlink("/usr/share/asciidoc3/images", "/etc/asciidoc3/images")
    os.chmod("/etc/asciidoc3/images", 0o755)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# make symlink: javascripts -> /usr/share/asciidoc3/javascripts
try:
    if os.access("/etc/asciidoc3/javascripts", os.F_OK | os.R_OK | os.W_OK):
        os.remove("/etc/asciidoc3/javascripts")
    os.symlink("/usr/share/asciidoc3/javascripts", "/etc/asciidoc3/javascripts")
    os.chmod("/etc/asciidoc3/javascripts", 0o755)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)


# copy files to '/etc/asciidoc3/dblatex'
etc_files = ("asciidoc3-dblatex.sty",
             "asciidoc3-dblatex.xsl",
             "dblatex-readme.txt")

try:
    for item in etc_files:
        shutil.copyfile("dblatex/"+item, "/etc/asciidoc3/dblatex/"+item)
        os.chmod("/etc/asciidoc3/dblatex/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy files to '/etc/asciidoc3/docbook-xsl'
etc_files = ("asciidoc3-docbook-xsl.txt",
             "chunked.xsl",
             "common.xsl",
             "epub.xsl",
             "fo.xsl",
             "htmlhelp.xsl",
             "manpage.xsl",
             "text.xsl",
             "xhtml.xsl")

try:
    for item in etc_files:
        shutil.copyfile("docbook-xsl/"+item, "/etc/asciidoc3/docbook-xsl/"+item)
        os.chmod("/etc/asciidoc3/docbook-xsl/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)


# copy files to '/etc/asciidoc3/filters/code'
etc_files = ("code-filter.conf",
             "code-filter.py",
             "code-filter-readme.txt",
             "code-filter-test.txt")

try:
    for item in etc_files:
        shutil.copyfile("filters/code/"+item, "/etc/asciidoc3/filters/code/"+item)
        os.chmod("/etc/asciidoc3/filters/code/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy files to '/etc/asciidoc3/filters/graphviz'
etc_files = ("asciidoc3-graphviz-sample.txt",
             "graphviz2png.py",
             "graphviz-filter.conf")

try:
    for item in etc_files:
        shutil.copyfile("filters/graphviz/"+item, "/etc/asciidoc3/filters/graphviz/"+item)
        os.chmod("/etc/asciidoc3/filters/graphviz/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy files to '/etc/asciidoc3/filters/latex'
etc_files = ("latex2png.py",
             "latex-filter.conf")

try:
    for item in etc_files:
        shutil.copyfile("filters/latex/"+item, "/etc/asciidoc3/filters/latex/"+item)
        os.chmod("/etc/asciidoc3/filters/latex/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy files to '/etc/asciidoc3/filters/music'
etc_files = ("music2png.py",
             "music-filter.conf",
             "music-filter-test.txt")

try:
    for item in etc_files:
        shutil.copyfile("filters/music/"+item, "/etc/asciidoc3/filters/music/"+item)
        os.chmod("/etc/asciidoc3/filters/music/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy files to '/etc/asciidoc3/filters/source'
etc_files = ("source-highlight-filter.conf",
             "source-highlight-filter-test.txt")

try:
    for item in etc_files:
        shutil.copyfile("filters/source/"+item, "/etc/asciidoc3/filters/source/"+item)
        os.chmod("/etc/asciidoc3/filters/source/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy files to '/etc/asciidoc3/stylesheets'
etc_files = ("asciidoc3.css",
             "docbook-xsl.css",
             "pygments.css",
             "slidy.css",
             "toc2.css")

try:
    for item in etc_files:
        shutil.copyfile("stylesheets/"+item, "/etc/asciidoc3/stylesheets/"+item)
        os.chmod("/etc/asciidoc3/stylesheets/"+item, 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy files to 'themes'
try:
    shutil.copyfile("themes/flask/flask.css", "/etc/asciidoc3/themes/flask/flask.css")
    os.chmod("/etc/asciidoc3/themes/flask/flask.css", 0o644)

    shutil.copyfile("themes/volnitsky/volnitsky.css", \
                    "/etc/asciidoc3/themes/volnitsky/volnitsky.css")
    os.chmod("/etc/asciidoc3/themes/volnitsky/volnitsky.css", 0o644)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# make symlink: /usr/share/asciidoc3/stylesheets -> /etc/asciidoc3/stylesheets
try:
    if os.access("/usr/share/asciidoc3/stylesheets", os.F_OK | os.R_OK | os.W_OK):
        os.remove("/usr/share/asciidoc3/stylesheets")
    os.symlink("/etc/asciidoc3/stylesheets", "/usr/share/asciidoc3/stylesheets")
    os.chmod("/usr/share/asciidoc3/stylesheets", 0o755)
except (OSError, PermissionError):
    print("no access to /etc/asciidoc3")
    sys.exit(1)

# copy 'manpages' to 'man1'
try:
    shutil.copyfile("doc/asciidoc3.1.gz", "/usr/share/man/man1/asciidoc3.1.gz")
    os.chmod("/usr/share/man/man1/asciidoc3.1.gz", 0o644)

    shutil.copyfile("doc/a2x3.1.gz", "/usr/share/man/man1/a2x3.1.gz")
    os.chmod("/usr/share/man/man1/a2x3.1.gz", 0o644)
except (OSError, PermissionError):
    print("usr/share/man/man1/")
    sys.exit(1)

# copy 'a2x3.py' to '/usr/bin/a2x3'
try:
    shutil.copyfile("a2x3.py", "/usr/bin/a2x3")
    os.chmod("/usr/bin/a2x3", 0o755)
except (OSError, PermissionError):
    print("/usr/bin/")
    sys.exit(1)