import asyncio
import click
import os
import shutil
import subprocess
import shlex
import sys
import typer
import webbrowser

import site_tools as st

from enum import Enum
from livereload import Server
from livereload.watcher import INotifyWatcher
from pathlib import Path
from pelican import main as pelican_main
from time import sleep
from typing_extensions import Annotated
from collections import defaultdict

from site_tools.content_manager import create
from site_tools.shell.interactive_shell import InteractiveShell
from rolltable.tables import RollTable


CONFIG = {
    'settings_base': st.DEV_SETTINGS_FILE_BASE,
    'settings_publish': st.PUB_SETTINGS_FILE_BASE,
    # Output path. Can be absolute or relative to tasks.py. Default: 'output'
    'deploy_path': st.SETTINGS['OUTPUT_PATH'],
    # Remote server configuration
    'ssh_user': 'greg',
    'ssh_host': 'froghat.club',
    'ssh_port': '22',
    'ssh_path': '/usr/local/deploy/deadsands/',
    # Host and port for `serve`
    'host': 'localhost',
    'port': 8000,
    # content manager config
    'templates_path': 'markdown-templates',
    # directory to watch for new assets
    'import_path': 'imports',
    # where new asseets will be made available
    'production_host': 'deadsands.froghat.club',
    # where to find roll table sources
    'table_sources_path': 'sources',
}

app = typer.Typer()


class ContentType(str, Enum):
    post = 'post'
    lore = 'lore'
    monster = 'monster'
    region = 'region'
    location = 'location'
    page = 'page'


class Die(str, Enum):
    d100 = '100'
    d20 = '20'
    d12 = '12'
    d10 = '10'
    d6 = '6'
    d4 = '4'


def pelican_run(cmd: list = [], publish=False) -> None:
    settings = CONFIG['settings_publish' if publish else 'settings_base']
    pelican_main(['-s', settings] + cmd)


@app.command()
def clean() -> None:
    if os.path.isdir(CONFIG['deploy_path']):
        shutil.rmtree(CONFIG['deploy_path'])
        os.makedirs(CONFIG['deploy_path'])


@app.command()
def build() -> None:
    subprocess.run(shlex.split('git submodule update --remote --merge'))
    pelican_run()


@app.command()
def watch() -> None:

    import_path = Path(CONFIG['import_path'])
    content_path = Path(st.SETTINGS['PATH'])

    def do_import():
        assets = []
        for src in import_path.rglob('*'):
            relpath = src.relative_to(import_path)
            target = content_path / relpath
            if src.is_dir():
                target.mkdir(parents=True, exist_ok=True)
                continue
            if target.exists():
                print(f"{target}: exists; skipping.")
                continue
            print(f"{target}: importing...")
            src.link_to(target)
            subprocess.run(shlex.split(f'git add {target}'))
            uri = target.relative_to('content')
            assets.append(f"https://{CONFIG['production_host']}/{uri}")
            src.unlink()
        if assets:
            publish()
            print('\n\t'.join(["\nImported Asset URLS:"] + assets))
            print("\n")

    watcher = INotifyWatcher()
    watcher.watch(import_path, do_import)
    watcher.start(do_import)
    print(f"Watching {import_path}. CTRL+C to exit.")
    while True:
        watcher.examine()
        sleep(5)


@app.command()
def serve() -> None:

    url = 'http://{host}:{port}/'.format(**CONFIG)

    def cached_build():
        pelican_run(['-ve', 'CACHE_CONTENT=true', 'LOAD_CONTENT_CACHE=true',
                     'SHOW_DRAFTS=true', f'SITEURL="{url}"'])

    clean()
    cached_build()
    server = Server()
    theme_path = st.SETTINGS['THEME']
    watched_globs = [
        CONFIG['settings_base'],
        '{}/templates/**/*.html'.format(theme_path),
    ]

    content_file_extensions = ['.md', '.rst']
    for extension in content_file_extensions:
        content_glob = '{0}/**/*{1}'.format(st.SETTINGS['PATH'], extension)
        watched_globs.append(content_glob)

    static_file_extensions = ['.css', '.js']
    for extension in static_file_extensions:
        static_file_glob = '{0}/static/**/*{1}'.format(theme_path, extension)
        watched_globs.append(static_file_glob)

    for glob in watched_globs:
        server.watch(glob, cached_build)

    if st.OPEN_BROWSER_ON_SERVE:
        webbrowser.open(url)

    server.serve(host=CONFIG['host'], port=CONFIG['port'],
                 root=CONFIG['deploy_path'])


@app.command()
def publish() -> None:
    clean()
    pelican_run(publish=True)
    subprocess.run(shlex.split(
        'rsync --delete --exclude ".DS_Store" -pthrvz -c '
        '-e "ssh -p {ssh_port}" '
        '{} {ssh_user}@{ssh_host}:{ssh_path}'.format(
            CONFIG['deploy_path'].rstrip('/') + '/',
            **CONFIG
        )
    ))


@app.command()
def restock(source: str = typer.Argument(
        ...,
        help='The source file for the store.'
    ),
    frequency: str = Annotated[
        str,
        typer.Option(
            'default',
            help='use the specified frequency from the source file'
        )
    ],
    die: Die = typer.Option(
        20,
        help='The size of the die for which to create a table'
    ),
    template_dir: str = Annotated[
        str,
        typer.Argument(
            CONFIG['templates_path'],
            help="Override the default location for markdown templates.",
        )
    ],
) -> None:

    rt = RollTable(
        [Path(source).read_text()],
        frequency=frequency,
        die=die,
        hide_rolls=True
    )
    store = rt.datasources[0].metadata['store']

    click.edit(filename=create(
        content_type='post',
        title=store['title'],
        template_dir=template_dir,
        category='stores',
        template='store',
        extra_context=dict(
            inventory=rt.as_markdown,
            **store
        )
    ))


@app.command()
def new(
    content_type: ContentType = typer.Argument(
        ...,
        help="The type of content to create.",
    ),
    title: str = typer.Argument(
        ...,
        help="The title of the content.",
    ),
    category: str = typer.Argument(
        None,
        help='Override the default category; required for "post" content.',
    ),
    template: str = typer.Argument(
        None,
        help="Override the default template for the content_type.",
    ),
    template_dir: str = typer.Argument(
        CONFIG['templates_path'],
        help="Override the default location for markdown templates.",
    )
) -> None:
    if not category:
        match content_type:
            case 'post':
                print("You must specify a category for 'post' content.")
                sys.exit()
            case 'monster':
                category = 'bestiary'
            case 'region':
                category = 'locations'
            case 'location':
                category = 'locations'
            case 'page':
                category = 'pages'
            case _:
                category = content_type.value
    click.edit(filename=create(content_type.value, title, template_dir,
                               category, template or content_type.value))


@app.command()
def dmsh():
    import termios, sys

    session = defaultdict(dict)
    prompt = InteractiveShell(
        [
            "[title]DM's Shell.[/title]",
            'dmsh'
        ], config=CONFIG, session=session
    )

    # ensure the terminal is restored on exit.
    old_attrs = termios.tcgetattr(sys.stdin)
    try:
        asyncio.run(prompt.start())
    finally:
        termios.tcsetattr(sys.stdin, termios.TCSANOW, old_attrs)


if __name__ == '__main__':
    app()