#!/usr/bin/env python3
"""Append a turn to the story book and clear turn temp files.

Usage:
    python3 scripts/store_turn.py "Dillion stepped into the chamber..."
    python3 scripts/store_turn.py < reaction.txt
"""

import sys
from pathlib import Path
from datetime import date

SESSION = Path(__file__).resolve().parent.parent / 'session'
BOOK = SESSION / 'book.md'
TURN_DESC = SESSION / 'turn_description.md'
TURN_PROMPT = SESSION / 'turn_prompt.md'
TURN_REACTION = SESSION / 'turn_reaction.md'

CLEAR_FILES = [TURN_DESC, TURN_PROMPT, TURN_REACTION]


def get_reaction() -> str:
    if len(sys.argv) > 1:
        return sys.argv[1]
    if not sys.stdin.isatty():
        return sys.stdin.read().strip()
    return ''


def main():
    reaction = get_reaction()
    if not reaction:
        print("No reaction text provided. Pass as argument or pipe stdin.")
        sys.exit(1)

    description = TURN_DESC.read_text().strip() if TURN_DESC.exists() else ''
    timestamp = date.today().isoformat()

    entry_parts = []
    if description:
        entry_parts.append(description)
    if reaction:
        entry_parts.append(reaction)

    entry = '\n\n'.join(entry_parts)
    heading = f'\n\n## Turn — {timestamp}\n\n'
    BOOK.parent.mkdir(parents=True, exist_ok=True)
    with open(BOOK, 'a') as f:
        f.write(heading + entry + '\n')

    for fpath in CLEAR_FILES:
        if fpath.exists():
            fpath.write_text('')

    print(f"✓ Turn stored → {BOOK}")


if __name__ == '__main__':
    main()