#!/usr/bin/env python3
"""
Example demonstrating how to use selectui as a library.

This shows various ways to integrate SelectUI into your Python applications.
"""

import sys

from selectui import SelectUI


def example_basic():
    """Basic usage: simple item selection."""
    print("Example 1: Basic item selection\n", file=sys.stderr)

    items = [
        {"title": "Python", "subtitle": "High-level programming language"},
        {"title": "JavaScript", "subtitle": "Dynamic web programming language"},
        {"title": "Rust", "subtitle": "Systems programming language"},
        {"title": "Go", "subtitle": "Concurrent programming language"},
        {"title": "Java", "subtitle": "Object-oriented programming language"},
    ]

    app = SelectUI(
        items=items,
        oneshot=True,
        title_key="title",
        subtitle_key="subtitle"
    )

    app.run()

    if app.selected_item:
        print(f"\nYou selected: {app.selected_item['title']}", file=sys.stderr)
        return app.selected_item
    return None


def example_custom_keys():
    """Using custom keys for title/subtitle."""
    print("Example 2: Custom keys for title/subtitle\n", file=sys.stderr)

    items = [
        {"name": "Alice", "role": "Engineer", "department": "Backend"},
        {"name": "Bob", "role": "Designer", "department": "Product"},
        {"name": "Charlie", "role": "Manager", "department": "Engineering"},
        {"name": "Diana", "role": "Developer", "department": "Frontend"},
    ]

    app = SelectUI(
        items=items,
        oneshot=True,
        title_key="name",
        subtitle_key="role",
        info_key="department"
    )

    app.run()

    if app.selected_item:
        print(f"\nYou selected: {app.selected_item['name']}", file=sys.stderr)
        return app.selected_item
    return None


def example_continuous_mode():
    """Continuous selection mode (not oneshot)."""
    print("Example 3: Continuous selection mode\n", file=sys.stderr)
    print("Press Enter multiple times to select items, q/Esc to quit\n", file=sys.stderr)

    items = [
        {"title": "Item 1", "value": "A"},
        {"title": "Item 2", "value": "B"},
        {"title": "Item 3", "value": "C"},
        {"title": "Item 4", "value": "D"},
    ]

    # Capture selections to a list
    selections = []

    def capture_selection(item):
        selections.append(item)

    app = SelectUI(
        items=items,
        oneshot=False,  # Allow multiple selections
        title_key="title"
    )

    app.run()

    print(f"\nTotal selections made: {len(selections)}", file=sys.stderr)
    return selections


def example_events_mode():
    """Events mode with custom key handlers."""
    print("Example 4: Events mode\n", file=sys.stderr)
    print("Press Ctrl+D to delete, Ctrl+E to edit, Enter to select\n", file=sys.stderr)

    items = [
        {"title": "Task 1", "status": "pending"},
        {"title": "Task 2", "status": "in-progress"},
        {"title": "Task 3", "status": "completed"},
    ]

    app = SelectUI(
        items=items,
        oneshot=False,
        events_mode=True,
        title_key="title",
        subtitle_key="status"
    )

    app.run()


def example_single_line():
    """Single-line display (no subtitle)."""
    print("Example 5: Single-line display\n", file=sys.stderr)

    items = [
        {"filename": "config.json"},
        {"filename": "package.json"},
        {"filename": "README.md"},
        {"filename": "setup.py"},
    ]

    app = SelectUI(
        items=items,
        oneshot=True,
        title_key="filename",
        subtitle_key=None  # No subtitle = single-line display
    )

    app.run()

    if app.selected_item:
        print(f"\nYou selected: {app.selected_item['filename']}", file=sys.stderr)
        return app.selected_item
    return None


def example_command_mode():
    """Command mode with dynamic item generation."""
    print("Example 6: Command mode with dynamic search\n", file=sys.stderr)
    print("Type to search, Tab to switch between input/search modes\n", file=sys.stderr)

    # Use find command to search for files
    # The {} will be replaced with user input
    app = SelectUI(
        items=[],
        oneshot=True,
        command_template='find . -type f -name "*{}*" 2>/dev/null | head -20 | while read f; do echo "{\\"title\\": \\"$f\\"}"; done'
    )

    app.run()

    if app.selected_item:
        print(f"\nYou selected: {app.selected_item.get('title', 'N/A')}", file=sys.stderr)
        return app.selected_item
    return None


def main():
    """Run examples based on command line argument."""
    if len(sys.argv) < 2:
        print("Usage: python library_usage.py <example_number>", file=sys.stderr)
        print("\nAvailable examples:", file=sys.stderr)
        print("  1 - Basic item selection", file=sys.stderr)
        print("  2 - Custom keys for title/subtitle", file=sys.stderr)
        print("  3 - Continuous selection mode", file=sys.stderr)
        print("  4 - Events mode", file=sys.stderr)
        print("  5 - Single-line display", file=sys.stderr)
        print("  6 - Command mode with dynamic search", file=sys.stderr)
        sys.exit(1)

    example_num = sys.argv[1]

    examples = {
        "1": example_basic,
        "2": example_custom_keys,
        "3": example_continuous_mode,
        "4": example_events_mode,
        "5": example_single_line,
        "6": example_command_mode,
    }

    if example_num not in examples:
        print(f"Error: Example {example_num} not found", file=sys.stderr)
        sys.exit(1)

    # Run the selected example
    result = examples[example_num]()

    # Output result as JSON to stdout (if any)
    if result:
        import json
        print(json.dumps(result, indent=2))


if __name__ == "__main__":
    main()