# SCons file for Sphinx
import sys
sys.path.append('./source')

import subprocess
from pathlib import Path
from sphinx.cmd.build import main as sphinx_build

import custom


doc = Environment(
    # You can set these variables from the command line.
    SPHINXOPTS    = "",
    SPHINXBUILD   = "sphinx-build",
    PAPER         = "",
    BUILDDIR      = "build")

# Internal variables.
PAPEROPT_a4     =  "-D latex_elements.papersize=a4paper"
#PAPEROPT_a4     =  "-D latex_paper_size=a4"
#PAPEROPT_letter =  "-D latex_paper_size=letter"
ALLSPHINXOPTS   = f"-d {doc['BUILDDIR']}/doctrees {PAPEROPT_a4} {doc['SPHINXOPTS']} source"
# the i18n builder cannot share the environment and doctrees with the others
I18NSPHINXOPTS  = "{PAPEROPT_a4} {SPHINXOPTS} source"

# create the banner of the website
banner_src = "./source/title_template.svg"
banner_tgt = "./source/title.svg"
def build_banner(env, target, source):
    custom.modify_banner(str(source[0]), str(target[0]))
banner = doc.Command(banner_tgt, banner_src, Action(build_banner, "Creating the website banner..."))
doc.Alias('banner', banner)

# convert *.svg and *.gif to *.png
# first find all of them
src_dir = Path('./source')
svg_pictures = list(src_dir.glob('**/*.svg'))
gif_pictures = list(src_dir.glob('**/*.gif'))
# conversion
pictures = []
for f in svg_pictures + banner:
    pictures += doc.Command(str(f).replace('.svg', '.png'), str(f), 
                    Action("convert -background none -density 150 $SOURCE $TARGET", 
                           "Converting $SOURCE to PNG..."))

for f in gif_pictures:
    pictures += doc.Command(str(f).replace('.gif', '.png'), str(f), 
                    Action("convert -background none -density 150 $SOURCE[0] $TARGET", 
                           "Converting $SOURCE to PNG..."))
doc.Alias('pictures', pictures)
Depends(pictures, banner)

# html
def html_builder(env, target, source):
    return sphinx_build(f"-b html {ALLSPHINXOPTS} {doc['BUILDDIR']}/html".split())

html = doc.Command("html.target", [], Action(html_builder, "Building html..."))
Depends(html, [banner, pictures])
AlwaysBuild(html)
Clean(html, f"{doc['BUILDDIR']}/html")
doc.Alias('html', html)

# generate sitemap.xml
t = f"{doc['BUILDDIR']}/html/sitemap.xml"
cmd = f"python source/sitemap-generate.py --url https://msspec.cnrs.fr --path {doc['BUILDDIR']}/html {t}"
sitemap = doc.Command(t, [], cmd)#Action(cmd, "Generating sitemap.xml..."))
Depends(sitemap, html)
doc.Alias('html', sitemap)

# install ownership
t = f"{doc['BUILDDIR']}/html"
s = Glob('source/google*.html')
ownership = doc.Install(t, s)
Depends(ownership, html)
doc.Alias('html', ownership)

# LaTeX PDF
def latexpdf_builder(env, target, source):
    rc = sphinx_build(f"-b latex {ALLSPHINXOPTS} {doc['BUILDDIR']}/latex".split())
    if rc == 0:
        subprocess.call(f"make -C {doc['BUILDDIR']}/latex all-pdf".split())

latexpdf = doc.Command("latexpdf.target", [], Action(latexpdf_builder, "Building LaTeX PDF..."))
Depends(latexpdf, [banner, pictures])
AlwaysBuild(latexpdf)
Clean(latexpdf, f"{doc['BUILDDIR']}/latex")
doc.Alias('latexpdf', latexpdf)