import textual
import json
from xlfg import parse_rule, parse_lexicon_entry, match_constraints, impose_constraints_in_tree, remove_unused_constraints
import d3

# Create a Textual App and a MainView
app = textual.Application("PyLFG")
main_view = textual.MainView()

# Create a menu bar with options to save and load grammars and lexicons
menu_bar = textual.MenuBar()
file_menu = textual.Menu("File")
file_menu.append(textual.MenuItem("Save Grammar", command=lambda: save_grammar()))
file_menu.append(textual.MenuItem("Load Grammar", command=lambda: load_grammar()))
file_menu.append(textual.MenuItem("Save Lexicon", command=lambda: save_lexicon()))
file_menu.append(textual.MenuItem("Load Lexicon", command=lambda: load_lexicon()))
menu_bar.append(file_menu)

# Create a search bar that allows users to search for specific production rules or lexicon entries
search_bar = textual.SearchBar()

# Production Rule Section
# Create a TextField for entering new production rules and a ListBox to display existing rules
rule_input = textual.TextField(placeholder="Enter production rule (e.g. NP → Det N {c-structure constraints})")
rule_list = textual.ListBox()
rule_list.search_bar = search_bar

# Add event handlers for adding and editing production rules
@rule_input.on("submit")
def add_rule():
    rule = rule_input.value
    lhs, rhs, c_structure_constraints = parse_rule(rule)
    # Add the rule to the list
    rule_list.append(f"{lhs} → {' '.join(rhs)} {c_structure_constraints}")

@rule_list.on("double_click")
def edit_rule(item):
    rule_input.value = item.text
    rule_list.remove(item)

clear_rules_button = textual.Button("Clear All Rules", command=lambda: rule_list.clear())

Lexicon Section

Create a TextField for entering new lexicon entries and a ListBox to display existing entries

lexicon_input = textual.TextField(placeholder="Enter lexicon entry (e.g. [functional label1=value1; functional label2=value2])")
lexicon_list = textual.ListBox()
lexicon_list.search_bar = search_bar

Add event handlers for adding and editing lexicon entries

@lexicon_input.on("submit")
def add_lexicon_entry():
lexicon_entry = lexicon_input.value
functional_labels = parse_lexicon_entry(lexicon_entry)
# Add the entry to the list
lexicon_list.append(f"{functional_labels}")

@lexicon_list.on("double_click")
def edit_lexicon_entry(item):
lexicon_input.value = item.text
lexicon_list.remove(item)

Add a "clear all" button for lexicon entries

clear_lexicon_button = textual.Button("Clear All Lexicon Entries", command=lambda: lexicon_list.clear())

C-structure and F-structure Section

Create a TreeView to display the parse tree

tree_view = textual.TreeView()

Add event handlers for imposing constraints and removing unused constraints

@tree_view.on("double_click")
def impose_constraints(node):
if isinstance(node, LFGParseTreeNodeF):
# Allow the user to enter new functional labels
functional_labels = {}
for label in node.get_all_functional_labels():
value = input(f"Enter value for {label}: ")
functional_labels[label] = value
impose_constraints_in_tree(node, functional_labels)

@tree_view.on("right_click")
def remove_constraints(node):
if isinstance(node, LFGParseTreeNodeF):
remove_unused_constraints(node)

Sentence Generation Section

Create a Button for generating sentences and a TextField to display the generated sentence

generate_button = textual.Button("Generate Sentence", command=lambda: generate_sentence())
generated_sentence = textual.TextField()

Add a "help" button that provides users with instructions and information on how to use the user interface and PyLFG

help_button = textual.Button("Help", command=lambda: show_help())

Add an "undo" and "redo" button that allows users to easily undo and redo their actions within the user interface

undo_button = textual.Button("Undo", command=lambda: undo_action())
redo_button = textual.Button("Redo", command=lambda: redo_action())

Create a "parse tree" tab that displays the parse tree for a given sentence

parse_tree_tab = textual.Tab("Parse Tree", content=tree_view)

Create a "c-structure" and "f-structure" tab that
displays the c-structure and f-structure for a given sentence
c_structure_tab = textual.Tab("C-structure", content=c_structure_view)
f_structure_tab = textual.Tab("F-structure", content=f_structure_view)

Add event handlers for the c-structure and f-structure tabs to update when a sentence is parsed

@tree_view.on("select")
def update_c_f_structure_tabs(node):
c_structure_view.set_content(node.c_structure)
f_structure_view.set_content(node.f_structure)

Add all elements to the main view

main_view.append(menu_bar)
main_view.append(search_bar)
main_view.append(rule_input)
main_view.append(rule_list)
main_view.append(clear_rules_button)
main_view.append(lexicon_input)
main_view.append(lexicon_list)
main_view.append(clear_lexicon_button)
main_view.append(parse_tree_tab)
main_view.append(c_structure_tab)
main_view.append(f_structure_tab)
main_view.append(generate_button)
main_view.append(generated_sentence)
main_view.append(help_button)
main_view.append(undo_button)
main_view.append(redo_button)

Set the main view as the content of the app

app.set_content(main_view)

Implement the save_grammar, load_grammar, save_lexicon, load_lexicon, generate_sentence, show_help, undo_action, and redo_action functions

def save_grammar():
# Code to save the current production rules and c-structure constraints to a file
pass

def load_grammar():
# Code to load production rules and c-structure constraints from a file
pass

def save_lexicon():
# Code to save the current lexicon entries to a file
pass

def load_lexicon():
# Code to load lexicon entries from a file
pass

def generate_sentence():
# Code to generate a sentence from the current f-structure
pass

def show_help():
# Code to display instructions and information on how to use the user interface and PyLFG
pass

def undo_action():
# Code to undo the last action within the user interface
pass

def redo_action():
# Code to redo the last action within the user interface
pass

Run the app

app.run()
