import logging

from app.appTypes import Character


# Per-difficulty quiz settings. The number of questions, the pass threshold, and
# whether hints are offered all scale with difficulty. Points are awarded by
# WordPress (mapped server-side from difficulty), not here.
QUIZ_DIFFICULTIES = {
    'easy': {
        'count': 3,
        'count_word': 'three',
        # At least this many correct to pass.
        'pass_threshold': 2,
        'pass_threshold_word': 'two',
        'hints': True,
    },
    'advanced': {
        'count': 5,
        'count_word': 'five',
        'pass_threshold': 4,
        'pass_threshold_word': 'four',
        'hints': False,
    },
}

DEFAULT_DIFFICULTY = 'easy'


class QuizService:
    def _difficulty_settings(self, difficulty: str) -> dict:
        return QUIZ_DIFFICULTIES.get(difficulty, QUIZ_DIFFICULTIES[DEFAULT_DIFFICULTY])

    def get_quiz_instructions(
        self, character: Character, title: str, body: str, difficulty: str = DEFAULT_DIFFICULTY
    ) -> str:
        d = self._difficulty_settings(difficulty)
        count_word = d['count_word']
        threshold_word = d['pass_threshold_word']

        if d['hints']:
            hint_rule = "- If the reader is stuck, give a gentle hint rather than the answer.\n"
        else:
            hint_rule = (
                "- This is the ADVANCED quiz: do NOT give hints. If the reader is stuck, "
                "encourage them to give their best answer, but never reveal or hint at the answer.\n"
            )

        instructions = (
            f"Your name is {character.name}. {character.description}\n\n"
            f"You are giving the reader an approachable {count_word}-question quiz on the article below. "
            "The goal is for the reader to PASS the quiz with a perfect or near-perfect score — "
            "this is meant to be encouraging, not punishing.\n\n"
            "Rules:\n"
            f"- Ask exactly {count_word} questions, ONE AT A TIME, waiting for the reader's answer before moving on.\n"
            "- Each question MUST be either:\n"
            "  (a) MULTIPLE CHOICE: present 3-4 labeled options (A, B, C, D) and ask the reader to pick one, OR\n"
            "  (b) SHORT ANSWER: a question whose answer is at most 1-2 words (a name, a number, a single term).\n"
            "- Never ask open-ended or essay questions. The reader should be able to answer in seconds.\n"
            f"- Mix the two formats across the {count_word} questions when it makes sense.\n"
            "- Cover the most important factual content of the article.\n"
            "- Be warm, patient, and encouraging throughout. Celebrate correct answers.\n"
            "- Accept reasonable variations in spelling, capitalization, and phrasing for short answers.\n"
            "- For multiple choice, accept either the letter (e.g., 'B') or the option text.\n"
            f"{hint_rule}"
            "- The reader can restart the quiz any time, as many times as they want — remind them of this if they seem frustrated.\n"
            "- The reader's result is NOT recorded unless they explicitly ask for it to be recorded.\n"
            f"- After the final answer, summarize how they did:\n"
            f"  - If all {count_word} are correct: tell them they PASSED with a perfect score and congratulate them warmly.\n"
            f"  - If at least {threshold_word} are correct: tell them they PASSED and congratulate them.\n"
            "  - Otherwise: encourage them, briefly mention which areas they might review, and invite them to try the quiz again.\n"
            "- Do NOT assign letter grades, points, or percentages. Just give friendly, conversational feedback.\n\n"
            "Status reporting (IMPORTANT):\n"
            "- You have access to a tool called `set_quiz_status`. Call it whenever the reader's overall quiz status changes.\n"
            f"- Call it with status='passed' ONLY in the same turn where you announce the reader has passed (at least {threshold_word} of {count_word} correct).\n"
            "- Call it with status='failed' ONLY if the reader explicitly gives up.\n"
            "- Otherwise do not call the tool — the default state is in_progress.\n"
            "- The tool call is a silent control signal; the user does not see it. Always send your normal chat reply alongside it.\n\n"
            f"Article title: {title}\n\n"
            "Article body:\n"
            f"{body}\n"
        )
        logging.debug('quiz instructions:\n%s', instructions)
        return instructions

    def get_quiz_intro_message(
        self, character: Character, title: str, difficulty: str = DEFAULT_DIFFICULTY
    ) -> str:
        d = self._difficulty_settings(difficulty)
        count_word = d['count_word']
        return (
            f"Hi! I'm {character.name}, and I'd love to give you a quick {count_word}-question quiz on "
            f"“{title}”. The questions are multiple choice or one-or-two-word answers, so it should "
            "be quick. You can restart any time, and your result won't be recorded unless you ask me to record it. "
            "Ready for question 1?"
        )