#!/usr/bin/env python3

from dataclasses import dataclass
import datetime
import os
import markdown
import pystache
import shutil
import yaml

class Datum:
    @classmethod
    def from_yaml(cls, data):
        return cls(**data)

    @classmethod
    def from_file(cls, path):
        with open(path) as f:
            data = yaml.safe_load(f)
            return cls.from_yaml(data)

@dataclass
class Quote(Datum):
    id: str
    content: str
    author: str

@dataclass
class Quip(Datum):
    id: str
    content: str

@dataclass
class Work:
    slug: str
    category: str
    title: str
    date: str
    contents: str

class Path:
    DATADIR=os.getenv('DATADIR', '/home/gdritter/projects/lib-data')
    OUTDIR=os.getenv('OUTDIR', '/tmp/lib')

    @classmethod
    def data(cls, *paths):
        return os.path.join(cls.DATADIR, *paths)

    @classmethod
    def out(cls, *paths):
        return os.path.join(cls.OUTDIR, *paths)

    @classmethod
    def write(cls, *paths):
        if len(paths) > 1:
            os.makedirs(cls.out(*paths[:-1]), exist_ok=True)
        return open(cls.out(*paths), 'w')

    @classmethod
    def read(cls, *paths):
        with open(cls.data(*paths)) as f:
            return f.read()

    @classmethod
    def list(cls, *paths):
        return os.listdir(cls.data(*paths))

class Template:
    renderer = pystache.Renderer(search_dirs="templates")

    def load_template(name):
        with open(f"templates/{name}.mustache") as f:
            parsed = pystache.parse(f.read())
        return lambda stuff: Template.renderer.render(parsed, stuff)

    main = load_template("main")
    quote = load_template("quote")
    list = load_template("list")


def main():
    year = datetime.datetime.now().year
    std_copy = f'© Getty Ritter {year}'
    no_copy = 'all rights reversed'

    # gather the quips and make their individual pages
    quips = []
    for uuid in Path.list('quips'):
        q = Quip.from_file(Path.data('quips', uuid))
        quips.append(q)
        with Path.write('quips', uuid, 'index.html') as f:
            f.write(Template.main({
                'title': f"Quip {uuid}",
                'contents': Template.quote({'quotelist': [q]}),
                'copy': no_copy,
            }))

    # sort 'em and make the combined page
    quips.sort(key=lambda q: q.id)
    with Path.write('quips', 'index.html') as f:
        f.write(Template.main({
            'title': "Quips",
            'contents': Template.quote({'quotelist': quips}),
            'copy': no_copy,
        }))

    # gather the quotes and make their individual pages
    quotes = []
    for uuid in Path.list('quotes'):
        q = Quote.from_file(Path.data('quotes', uuid))
        quotes.append(q)
        with Path.write('quotes', uuid, 'index.html') as f:
            f.write(Template.main({
                'title': f"Quote {uuid}",
                'contents': Template.quote({'quotelist': [q]}),
                'copy': no_copy,
            }))

    # sort 'em and make their combined page
    quotes.sort(key=lambda q: q.id)
    with Path.write('quotes', 'index.html') as f:
        f.write(Template.main({
            'title': "Quotes",
            'contents': Template.quote({'quotelist': quotes}),
            'copy': no_copy,
        }))

    # figure out what categories we've got
    with open(Path.data('works.json')) as f:
        categories = yaml.safe_load(f)

    # make an index page for each category
    with Path.write('category', 'index.html') as f:
        f.write(Template.main({
            'title': 'Categories',
            'contents': Template.list({
                'works': [
                    {'slug': f'category/{c["slug"]}', 'title': c['category']}
                    for c in categories
                ]
            }),
            'copy': 'whatever',
        }))

    # create each category page
    for slug in os.listdir(Path.data('works')):
        # we need to know what works exist in the category
        works = []
        for work in os.listdir(Path.data('works', slug)):
            # grab the metadata for this work
            with open(Path.data('works', slug, work, 'metadata.yaml')) as f:
                meta = yaml.safe_load(f)
            with open(Path.data('works', slug, work, 'text')) as f:
                text = markdown.markdown(f.read())
            w = Work(
                slug=meta.get('slug', work),
                category=meta.get('category', slug),
                title=meta['name'],
                date=meta['date'],
                contents=text,
            )

            if slug == 'pages':
                # always keep index/about up-to-date
                copy = std_copy
            else:
                # report other works in their own year
                copy = f'© Getty Ritter {w.date}'

            with Path.write(w.slug, 'index.html') as f:
                f.write(Template.main({
                    'title': w.title,
                    'contents': text,
                    'copy': copy,
                }))
            works.append(w)
        works.sort(key=lambda w: w.slug)

        # not every on-disk category should be shown: we should find
        # it in the categories list first
        category_metadata = [c for c in categories if c['slug'] == slug]
        if not category_metadata:
            print(f'skipping {slug}')
            continue

        with Path.write('category', slug, 'index.html') as f:
            f.write(Template.main({
                'title': category_metadata[0]['category'],
                'contents': Template.list({
                    'works': works,
                }),
                'copy': std_copy,
            }))

    shutil.copy(Path.out('index', 'index.html'), Path.out('index.html'))

    os.makedirs(Path.out('static'), exist_ok=True)
    shutil.copy('static/main.css', Path.out('static', 'main.css'))
    shutil.copy('static/icon.png', Path.out('static', 'icon.png'))


if __name__ == '__main__':
    main()