import os
import sys
import webbrowser

from invoke import task

docs_dir = 'docs'
build_dir = os.path.join(docs_dir, '_build')

@task
def clean(ctx):
    ctx.run('rm -rf dist')
    ctx.run('rm -rf build')
    ctx.run('rm -rf flask_apispec.egg-info')

@task
def install(ctx):
    ctx.run('npm install')
    ctx.run('rm -rf flask_apispec/static')
    ctx.run('cp -r node_modules/swagger-ui-dist flask_apispec/static')

@task
def clean_docs(ctx):
    ctx.run("rm -rf %s" % build_dir)

@task
def browse_docs(ctx):
    path = os.path.join(build_dir, 'index.html')
    webbrowser.open_new_tab(path)

def build_docs(ctx, browse):
    ctx.run("sphinx-build {} {}".format(docs_dir, build_dir), echo=True)
    if browse:
        browse_docs(ctx)

@task
def docs(ctx, clean=False, browse=False, watch=False):
    """Build the docs."""
    if clean:
        clean_docs(ctx)
    if watch:
        watch_docs(ctx, browse=browse)
    else:
        build_docs(ctx, browse=browse)

@task
def watch_docs(ctx, browse=False):
    """Run build the docs when a file changes."""
    try:
        import sphinx_autobuild  # noqa
    except ImportError:
        print('ERROR: watch task requires the sphinx_autobuild package.')
        print('Install it with:')
        print('    pip install sphinx-autobuild')
        sys.exit(1)
    ctx.run('sphinx-autobuild {} {} {} -z marshmallow'.format(
        '--open-browser' if browse else '', docs_dir, build_dir), echo=True, pty=True)


@task
def readme(ctx, browse=False):
    ctx.run("rst2html.py README.rst > README.html")
    if browse:
        webbrowser.open_new_tab('README.html')
