journal/journal.py

from copy import deepcopy
from datetime import datetime, timedelta
from functools import reduce, partial
from pathlib import Path
from shutil import copyfile, rmtree
from subprocess import run
from tempfile import mktemp, mkdtemp
from typing import Any, Callable, Optional, Tuple, TypeVar, Union
from zipfile import ZipFile
import json
import random
import re
import sys
import textwrap
import traceback

### GLOBALS

JOURNAL_PATH = Path.home() / '.journal.json'

### UTILS


def nth_or_default(n, l, default):
    return l[n] if n < len(l) else default

def apply(f, x):
    return f(x)

def flip(f):
    return lambda a1, a2: f(a2, a1)
    
def compose(*fns):
    return partial(reduce, flip(apply), fns)

def wrap_text(text, columns=80):
    return textwrap.fill(text, columns,
        replace_whitespace=False,
        break_on_hyphens=False,
        break_long_words=False)

def split_keep(delims, string):
    res = []
    buf = []

    def flush_buf():
        nonlocal res, buf
        if buf:
            res.append(''.join(buf))
        buf = []

    for c in string:
        if c in delims:
            flush_buf()
            res.append(c)
        else:
            buf.append(c)

    flush_buf()

    return res

def merge_if(pred, l):
    res = []

    for i, curr in enumerate(l):
        prev = l[i-1] if i-1 >= 0 else None
        if prev and pred(prev, curr):
            res[-1] += curr
        else:
            res.append(curr)

    return res

def open_editor(fpath):
    run(['nvim', '+', str(fpath)])

def edit_text(text, suffix=''):
    fpath = Path(mktemp(suffix=suffix))

    fpath.write_text(text)

    open_editor(fpath)

    text = fpath.read_text()

    fpath.unlink()
    
    return text

def prompt(text):
    return input(text + ' [y/n] ') == 'y'

### DATE UTILS

def parse_date(date):
    return datetime.strptime(date, '%Y-%m-%d')

def format_date(date):
    return date.strftime('%Y-%m-%d')

def today():
    return datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)

def evaluate_time_expression(expression):
    if expression == 'today':
        return datetime.now()
    elif expression == 'yesterday':
        return datetime.now() - timedelta(days=1)

def get_abbr_for_weekday(date):
    return {
        0: 'mo', 1: 'tu', 2: 'we', 3: 'th',
        4: 'fr', 5: 'sa', 6: 'su',
    }[parse_date(date).weekday()]

def parse_timestamp(timestamp):
    return int(datetime.strptime(timestamp, '%Y-%m-%d %H:%M:%S').timestamp())

def format_timestamp(timestamp):
    return datetime.fromtimestamp(timestamp).strftime('%Y-%m-%d %H:%M:%S')

### FILE PARSERS

def parse_foods_file(text):
    foods_str, recipes_str = text.split('---')

    def parse_macro(macro):
        name, value = macro.split()
        return (name, float(value.removesuffix('g').removesuffix('kcal')))

    foods = {
        macros[0]: dict(parse_macro(macro) for macro in macros[1:])
        for macros in [food.split('\n') for food in foods_str.strip().split('\n\n')]
    }

    recipes = {}

    def evaluate_ingredients(ingredients):
        result = {}

        total_weight = 0.0
        for ingredient in ingredients:
            k,v = parse_macro(ingredient)
            if k == 'TOTAL':
                result[k] = v
                continue
            else:
                total_weight += v

            food = foods.get(k)
            total = 100.0
            if not food:
                food = recipes[k].copy()
                total = food['TOTAL']
                del food['TOTAL']

            for kk,vv in food.items():
                if kk not in result:
                    result[kk] = 0.0

                result[kk] += vv * (v/total)

        if 'TOTAL' not in result:
            result['TOTAL'] = total_weight

        return result

    for ingredients in [recipe.split('\n') for recipe in recipes_str.strip().split('\n\n')]:
        recipes[ingredients[0]] = evaluate_ingredients(ingredients[1:])

    return foods, recipes

def evaluate_food_entry(foods, recipes, value, name):
    if name in recipes:
        food = recipes[name]

        if value == 0.0:
            value = food['TOTAL']

        food = {k: v*(value/food['TOTAL']) for k,v in food.items()}
    elif name in foods:
        if value == 0.0:
            value = 100

        food = {k: v*(value/100.0) for k,v in foods[name].items()}
    else:
        breakpoint()
        print(f'ERROR: Invalid diet entry: {name}')
        assert False

    return food

def parse_tasks_file(text):
    result = []

    for task in text.splitlines():
        days, name = task.split(':')
        days = days.split(',')
        result.append((days, name))

    return result

def get_godword(journal):
    return journal['files']['godword'].strip().split('\n')

def get_habits(journal):
    return journal['files']['habits'].strip().split('\n')

def get_tasks(journal):
    return parse_tasks_file(journal['files']['tasks'])

### HACKY HACKERY

_global_do_not_use = {}

def init_hacky_hackery(journal):
    global _global_do_not_use
    _global_do_not_use = journal

def get_foods_file():
    return parse_foods_file(_global_do_not_use['files']['foods'])

### HEADER MODULES

def get_notifications_for_date(journal, date):
    notifications = []

    for day in journal['days'].values():
        for entry in day.get('entries'):
            for block in entry['blocks']:
                if not isinstance(block, str) and block['type'] == 'notify':
                    if block['day'] == date:
                        notifications.append({
                            'source': entry['timestamp'],
                            'message': block['message']
                        })

    return notifications

def get_yesterdays_sticky(journal, date):
    yesterday = format_date(parse_date(date) - timedelta(days=1))

    if day := journal['days'].get(yesterday):
        if sticky := day['header'].get('sticky'):
            return sticky

header_modules = {
    'godword': (
        lambda j, d: [random.choice(get_godword(j)) for _ in range(20)],
        lambda b: b.split(),
        lambda v: f"{' '.join(v[:10])}\n{' '.join(v[10:])}"
    ),

    'habits': (
        lambda j, d: {x: False for x in get_habits(j)},
        lambda b: {
            name.strip(): value[1] == 'x'
            for (value, name) in [
                line.split(maxsplit=1)
                for line in b.splitlines()
            ]
        },
        lambda v: '\n'.join(f'[{"x" if v else "-"}] {k}' for k,v in v.items())
    ),

    'notifications': (
        lambda j, d: get_notifications_for_date(j, d),
        lambda b: [{
            'source': parse_timestamp(' '.join(parts[0:2]).strip('[]')),
            'message': ' '.join(parts[2:]),
        } for parts in [line.split() for line in b.splitlines()]],
        lambda v: '\n'.join(f'[[{format_timestamp(n["source"])}]] {n["message"]}' for n in v)
    ),

    'tasks': (
        lambda j, d: {name: False for days, name in get_tasks(j) if get_abbr_for_weekday(d) in days},
        lambda b: {
            name.strip(): value[1] == 'x'
            for (value, name) in [
                line.split(maxsplit=1)
                for line in b.splitlines()
            ]
        },
        lambda v: '\n'.join(f'[{"x" if v else "-"}] {k}' for k,v in v.items())
    ),

    'sticky': (
        lambda j, d: get_yesterdays_sticky(j, d),
        lambda b: b,
        lambda v: v,
    )
}

def create_header_module(name, journal, date):
    return header_modules[name][0](journal, date)

def parse_header_module(name, block):
    return header_modules[name][1](block)

def generate_header_module(name, value):
    return header_modules[name][2](value)

### ENTRY MODULES

def parse_timer(block):
    rest = block.split()

    name = None
    timestamp = None
    if len(rest) > 2:
        name, *rest = rest
    if len(rest) > 1:
        timestamp = parse_timestamp(' '.join(rest))

    result = {}

    if name:
        result['name'] = name
    if timestamp:
        result['timestamp'] = timestamp

    return result

def generate_timer(value):
    parts = []

    if name := value.get('name'):
        parts.append(name)

    if ts := value.get('timestamp'):
        parts.append(format_timestamp(ts))

    return ' '.join(parts)

def parse_exercise(block):
    parts = block.split()

    if parts[0] == 'walk':
        kind, minutes, distance, steps = parts
        return {
            'kind': kind,
            'minutes': int(minutes.removesuffix('min')),
            'distance': float(distance.removesuffix('km')),
            'steps': int(steps.removesuffix('steps')),
        }
    
    elif parts[0] == 'calisthenics':
        kind, split, exercise = parts
        sets, reps = split.split('x')
        return {
            'kind': kind,
            'reps': reps,
            'sets': sets,
            'exercise': exercise,
        }

    assert False

def generate_exercise(value):
    if value['kind'] == 'walk':
        return f'walk {value["minutes"]}min {value["distance"]}km {value["steps"]}steps'
    elif value['kind'] == 'calisthenics':
        return f'calisthenics {value["sets"]}x{value["reps"]} {value["exercise"]}'

    assert False

DEFAULT_PARSER = lambda b: {'value': b}
DEFAULT_GENERATOR = lambda b: b['value']

entry_modules = {
    'diet': (
        lambda b: {'amount': int(b.split()[0].removesuffix('g')), 'food': b.split()[1].strip()},
        lambda v: f'{v["amount"]}g {v["food"]}'),
    'exercise': (parse_exercise, generate_exercise),
    'behavior': (DEFAULT_PARSER, DEFAULT_GENERATOR),

    'hide': (lambda _: {}, lambda _: ''),
    'info': (DEFAULT_PARSER, compose(DEFAULT_GENERATOR, wrap_text)),

    'post': (
        lambda b: {'timestamp': parse_timestamp(b.removeprefix('@post ').strip())},
        lambda v: format_timestamp(v["timestamp"])
    ),
    'notes': (
        compose(
            lambda b: b.splitlines(),
            lambda s: {'source': s[0], 'title': s[1]},
        ),
        lambda v: f'{v["source"]}\n{v["title"]}'
    ),

    'task': (DEFAULT_PARSER, DEFAULT_GENERATOR),
    'start': (parse_timer, generate_timer),
    'stop': (parse_timer, generate_timer),
    'done': (parse_timer, generate_timer),

    'notify': (
        compose(
            lambda b: b.split(maxsplit=1),
            lambda s: {'day': s[0], 'message': s[1]}
        ),
        lambda v: f'{v["day"]} {v["message"]}'
    ),

    'tag': (
        lambda b: {'value': b.split(',')},
        lambda v: ','.join(v['value'])
    )
}

def parse_entry_module(block):
    tag = block.split()[0].removeprefix('@')
    block = block.removeprefix(f'@{tag}').strip()

    return {'type': tag} | entry_modules[tag][0](block)

def generate_entry_module(block):
    if block['type'] == 'notes':
        return f'@notes\n{entry_modules[block["type"]][1](block)}'

    return f'@{block["type"]} {entry_modules[block["type"]][1](block)}'

### READ-ONLY STATS SECTION FUNCTIONS

def generate_stats(page):
    if not page['entries']:
        return ''
    
    result = ''

    num_entries = len(page['entries'])
    num_blocks = sum(len(entry['blocks']) for entry in page['entries'])
    text_concat = ' '.join(b for e in page['entries'] for b in e['blocks'] if isinstance(b, str))
    num_words = len(text_concat.split())
    result += f'Entries: {num_entries}, Blocks: {num_blocks}, Words: {num_words}'

    last_entry = max(e['timestamp'] for e in page['entries'])
    first_entry = min(e['timestamp'] for e in page['entries'])
    entry_delta = last_entry - first_entry
    entry_hours = round(entry_delta / 60 / 60, 2)
    result += f'\nFirst: {format_timestamp(first_entry)}, Last: {format_timestamp(last_entry)}, Hours: {entry_hours}'

    calories = 0
    carbs = 0
    fat = 0
    protein = 0
    sugar = 0
    num_meals = 0
    first_meal = float('inf')
    last_meal = float('-inf')

    foods, recipes = get_foods_file()
    for entry in page['entries']:
        did_count = False
        for block in entry['blocks']:
            if not isinstance(block, str) and block['type'] == 'diet':
                food = evaluate_food_entry(foods, recipes, block['amount'], block['food'])

                if not did_count:
                    num_meals += 1
                    first_meal = min(entry['timestamp'], first_meal)
                    last_meal = max(entry['timestamp'], last_meal)
                    did_count = True
                
                calories += food['Energy']
                carbs += food.get('Carbs', 0)
                fat += food.get('Fat', 0)
                protein += food.get('Protein', 0)
                sugar += food.get('Sugar', 0)
        
    carbs_proportion = round(carbs * 4 / calories * 100) if carbs and calories else 0
    fat_proportion = round(fat * 9 / calories * 100) if fat and calories else 0
    protein_proportion = round(protein * 4 / calories * 100) if protein and calories else 0
    
    calories, carbs, fat, protein, sugar = map(partial(round, ndigits=2), [calories, carbs, fat, protein, sugar])

    meal_delta = last_meal - first_meal
    meal_hours = round(meal_delta / 60 / 60, 2)

    result += f'\nCalories: {calories} ({carbs_proportion}/{fat_proportion}/{protein_proportion}, {protein}/{sugar}), Meals: {num_meals}, Hours: {meal_hours}'

    return result

### PAGE FUNCTIONS

def create_header(journal, date):
    return {
        module: create_header_module(module, journal, date)
        for module in header_modules
    }

def create_entry(journal, date):
    return {
        'timestamp': int(today().timestamp()),
        'blocks': []
    }

def create_day(journal, date):
    return {
        'title': date,
        'header': create_header(journal, date),
        'entries': []
    }

def parse_header(text):
    def split_into_blocks(text):
        return [b.strip() for b in re.split(r'\n{2,}', text) if b.strip() != '']

    modules = split_into_blocks(text)

    result = {}

    for module in modules:
        name, block = module.split('\n', maxsplit=1)
        name = name.lower().removesuffix(':')
        result[name] = parse_header_module(name, block)
    
    return result

def generate_header(header):
    result = ''

    for name, header in header.items():
        if not header:
            continue

        result += f'\n\n{name.title()}:\n'
        result += generate_header_module(name, header)
    
    return result

def parse_entry(timestamp, content):
    def merge_notes_block(l):
        res = []

        i = 0
        while i < len(l):
            if l[i] == '@notes':
                # notes nl source nl title
                res.append('\n'.join([l[i], l[i+2], l[i+4]]))
                i += 5
            else:
                res.append(l[i])
                i += 1

        return res

    def merge_wrapped_lines(l):
        TIMESTAMP_LENGTH = len('2020-02-02 02:02:02 ')
        POST_BLOCK_LENGTH = len('@post 2020-02-02 02:02:02 ')
        COLUMN_LIMIT = 80

        res = []

        i = 0
        while i < len(l):
            curr = l[i]
            prev = l[i-1] if i > 0 else None
            next = l[i+1] if i+1 < len(l) else None

            before_prev = l[i-2] if i-2 >= 0 else None
            before_before_prev = l[i-3] if i-3 >= 0 else None

            # ['aoeu', '\n', 'aoeu']
            if prev and curr == '\n' and next:
                len_prev = len(prev)

                # first block is preceded by timestamp
                if i - 1 == 0:
                    len_prev += TIMESTAMP_LENGTH

                if before_prev and before_before_prev and before_prev.startswith('@post') and all(c == '\n' for c in before_before_prev):
                    len_prev += POST_BLOCK_LENGTH

                # do not wrap indented lines
                if not next[0].isspace():
                    next_word = next.split()[0]

                    # merge only if text is actually wrapped
                    if len_prev + len(next_word) >= COLUMN_LIMIT:
                        res[-1] += ' ' + next
                        i += 2
                        continue

            res.append(curr)
            i += 1

        return res

    def split_post_block(l):
        res = []

        POST_BLOCK_LENGTH = len('@post 2020-02-02 02:02:02')

        i = 0
        while i < len(l):
            curr = l[i]

            if curr.startswith('@post'):
                res.append(curr[:POST_BLOCK_LENGTH])
                res.append(curr[POST_BLOCK_LENGTH+1:])
            else:
                res.append(curr)

            i += 1
        
        return res

    split_into_blocks = compose(
        # split the text into sections by newline and tag symbol, keeping the separators
        partial(split_keep, ('\n', '@')), 

        # merge sequential newlines together into a single whitespace block 
        partial(merge_if, lambda p, c: p == c == '\n'),

        ## TAG PARSING
        # attach escaped tags
        partial(merge_if, lambda p, c: c == '@' and p[-1] == '\\'), 
        # attach tag
        partial(merge_if, lambda p, c: p == '@'),
        # attach tags which do not come after newline or another tag
        partial(merge_if, lambda p, c: c[0] == '@' and not (not p[-1] != '\n' or (p[0] == '@' and p[-1] == ' '))), 

        ## SPECIAL BLOCK PARSING
        # merge notes block (because it spans 3 lines or 5 blocks)
        merge_notes_block,
        # split post block (because next block could be attached to it)
        split_post_block,

        # strip all non-whitespace blocks
        partial(map, lambda s: s if s.isspace() else s.rstrip()), list,
        # merge escaped tags with following text
        partial(merge_if, lambda p, c: p.endswith('\\@')), 

        # merge wrapped lines
        merge_wrapped_lines,

        # remove trailing whitespace block
        lambda b: b if b and not all(c == '\n' for c in b[-1]) else b[:-1],
    )

    return {
        'timestamp': parse_timestamp(timestamp.strip()),
        'blocks': [(parse_entry_module(b) if b.startswith('@') else b) for b in split_into_blocks(content)],
    }

def generate_entry(entry):
    def format_block(curr: Any, prev: Any, before_prev: Any):
        def format_text(text):
            if all(c == '\n' for c in curr):
                return text

            DUMMY_TS = '2020-02-02 02:02:02 '
            DUMMY_POST = '@post 2020-02-02 02:02:02 '

            is_first = not prev
            is_post = (before_prev and all(c == '\n' for c in before_prev) and isinstance(prev, dict) and prev['type'] == 'post')

            if is_first:
                text = DUMMY_TS + text

            if is_post:
                text = DUMMY_POST + text
            
            length = len(text)
            
            if length > 80:
                text = wrap_text(text)
            
            if is_post:
                text = text.removeprefix(DUMMY_POST)

            if is_first:
                text = text.removeprefix(DUMMY_TS)
            
            return text
        
        formatted = format_text(curr) if isinstance(curr, str) else generate_entry_module(curr)

        if result[-1] != '\n' and not all(c == '\n' for c in formatted):
            formatted = ' ' + formatted
        
        return formatted

    result = f'\n\n{format_timestamp(entry["timestamp"])}'
        
    i = 0
    while i < len(entry['blocks']):
        curr = entry['blocks'][i]
        prev = entry['blocks'][i-1] if i-1 >= 0 else None
        before_prev = entry['blocks'][i-2] if i-2 >= 0 else None

        result += format_block(curr, prev, before_prev)

        i += 1
    
    return result

def parse_day(text):
    # discard read-only QS section
    text = text[text.find('#'):]

    ENTRY_RE = re.compile(r'^(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}) ?', re.MULTILINE)

    header, *tmp = ENTRY_RE.split(text)
    entries = list(zip(tmp[::2], tmp[1::2]))

    title, *header = header.split('\n', maxsplit=1)
    title = title.removeprefix('# ')
    header = header[0] if len(header) else ''

    return {
        'title': title,
        'header': parse_header(header),
        'entries': [parse_entry(timestamp, content) for timestamp, content in entries],
    }

def generate_day(day):
    result = ''

    result += generate_stats(day)

    result += f'\n\n# {day["title"]}'

    result += generate_header(day['header'])

    for entry in day['entries']:
        result += generate_entry(entry)

    result += '\n'

    return result

### COMMAND UTILS

def load_journal():
    return json.loads(JOURNAL_PATH.read_text())

def save_journal(journal):
    JOURNAL_PATH.write_text(json.dumps(journal))

def import_journal(fpath):
    return {
        'days': {
            fname.stem: parse_day(fname.read_text())
            for fname in list(sorted(fpath.glob('*.md')))
        },
        'files': {
            fname: (fpath / fname).read_text()
            for fname in ['habits', 'godword', 'tasks', 'foods']
        }
    }

def export_journal(journal, fpath):
    for day in journal['days'].values():
        (fpath / (day['title'] + '.md')).write_text(generate_day(day))
    
    for fname, content in journal['files'].items():
        (fpath / fname).write_text(content)
    
def backup_journal(journal):
    print('Creating backup...')

    tmpdir = Path(mkdtemp())

    export_journal(journal, tmpdir)
    copyfile(str(JOURNAL_PATH), str(tmpdir / 'journal.json'))

    files = Path(tmpdir).glob('*')

    current_date = datetime.now().strftime('%Y-%m-%d')

    zipfile_path = Path(f'{current_date}.zip')

    zipfile = ZipFile(zipfile_path, 'w')
    
    for file in files:
        zipfile.write(file, arcname=file.name)

    rmtree(tmpdir)

    if script := journal['files'].get('backup'):
        print('Found script, running...')
        run(['bash', '-c', script.replace('%ZIPFILE%', f"'{str(zipfile_path.absolute())}'")])
    
    return zipfile_path

def open_journal(journal, date):
    if not journal['days'].get(date):
        backup_journal(journal)
        journal['days'][date] = create_day(journal, date)

    tmpdir = Path(mkdtemp())
    export_journal(journal, tmpdir)

    while True:
        try:
            open_editor(tmpdir / f'{date}.md')
            new_journal = import_journal(tmpdir)
            break
        except Exception as _:
            traceback.print_exc()
            input('Press enter to try again...')

    return new_journal

### COMMAND HANDLERS

def handle_open(args):
    subcommand = nth_or_default(0, args, 'today')

    if date := evaluate_time_expression(subcommand):
        save_journal(open_journal(load_journal(), format_date(date)))
    else:
        print(f'Invalid subcommand: {subcommand}')

def handle_edit(args):
    subcommand = nth_or_default(0, args, 'foods')

    journal = load_journal()

    if subcommand in journal['files']:
        journal['files'][subcommand] = edit_text(journal['files'][subcommand])
    elif prompt(f'Unknown file: {subcommand}, create new?'):
        journal['files'][subcommand] = edit_text('')

    save_journal(journal)

def handle_import(args):
    if len(args) < 1:
        print('Missing directory.')
        return

    path = Path(args[0])

    if not path.is_dir():
        print(f'Invalid directory: {path}')
        return

    save_journal(import_journal(path))

def handle_export(args):
    if len(args) < 1:
        print('Missing directory.')
        return
    
    path = Path(args[0])

    if not path.is_dir():
        print(f'Invalid directory: {path}')
        return
    
    export_journal(load_journal(), path)

def handle_test(args):
    journal = load_journal()

    journal_orig = deepcopy(journal)

    for day in journal['days']:
        journal['days'][day] = parse_day(generate_day(journal['days'][day]))

    if journal != journal_orig:
        print('Test failed!')

        print('Dumping journal.fail.json and journal.fail.orig.json...')
        Path('journal.fail.json').write_text(json.dumps(journal, indent=4))
        Path('journal.fail.orig.json').write_text(json.dumps(journal_orig, indent=4))
    else:
        print('Test passed!')

def handle_summary(args):
    def generate_food_summary(day):
        result = ''

        def print(str=''):
            nonlocal result
            result += '\n' + str
        
        foods, recipes = get_foods_file()

        daily_calories = 0.0
        daily_protein = 0.0

        for entry in day['entries']:
            has_printed = False
            entry_calories = 0.0
            entry_protein = 0.0
            for diet in (b for b in entry['blocks'] if type(b) != str and b['type'] == 'diet'):
                if not has_printed:
                    print(f'-- {format_timestamp(entry["timestamp"])}')
                    has_printed = True

                value = diet['amount']
                name = diet['food']

                if name in recipes:
                    food = recipes[name]

                    if value == 0.0:
                        value = food['TOTAL']

                    food = {k: v*(value/food['TOTAL']) for k,v in food.items()}
                elif name in foods:
                    if value == 0.0:
                        value = 100

                    food = {k: v*(value/100.0) for k,v in foods[name].items()}
                else:
                    print(f'ERROR: Invalid diet entry: {diet}')
                    continue

                protein = round(food.get('Protein', 0.0), 2)
                calories = round(food.get('Energy', 0.0), 2)

                entry_calories += calories
                entry_protein += protein

                print(f'{name:<20} {value:<6}g, {calories:<6}kcal, {protein:<6}g protein')

            if has_printed:
                entry_calories = round(entry_calories, 2)
                entry_protein = round(entry_protein, 2)
                print(f'-- TOTAL: {entry_calories}kcal, {entry_protein}g protein')
                print()

            daily_calories += entry_calories
            daily_protein += entry_protein

        print(f'-- DAILY TOTAL ({daily_calories}kcal, {daily_protein}g protein)')

        return result

    subcommand = nth_or_default(0, args, 'today')

    date = evaluate_time_expression(subcommand)
    if not date:
        print(f'Invalid time expression: {subcommand}')
        return
    
    date = format_date(date)

    journal = load_journal()

    print(generate_food_summary(journal['days'][date]))

def handle_backup(args):
    archive_path = backup_journal(load_journal())
    if prompt('Delete backup archive?'):
        archive_path.unlink()

### MAIN

def main():
    init_hacky_hackery(load_journal())

    command = nth_or_default(1, sys.argv, 'open')
    args = sys.argv[2:]

    def handle_invalid(args):
        print(f'Invalid command: {command}')

    command_handlers = {
        'open': handle_open,
        'edit': handle_edit,
        'import': handle_import,
        'export': handle_export,
        'test': handle_test,
        'summary': handle_summary,
        'backup': handle_backup,
    }

    handler = command_handlers.get(command, handle_invalid)

    handler(args)

if __name__ == '__main__':
    main()