import json
import os
import random

import gradio as gr
from dotenv import load_dotenv

from constants import MODELS, MODELS_PATH, BOOKS
from utils import save_results

load_dotenv()

if os.getenv("ENV_TYPE") == "dev":
    MODELS["Test"] = "test"
    MODELS_PATH["Test"] = "test"
    BOOKS["Test"] = "test.json"

questions_data = []
current_question_index = 0
answers_log = []  # Log for saving answers
feedback_questions = ""


def get_question():
    global questions_data, current_question_index
    question = questions_data[current_question_index]
    question_text = f"# Питання:\n## {question['question']}"
    answers = [answer['answer'] for answer in question['answers']]
    random.shuffle(answers)
    return question_text, answers


def load_questions(model, book, student_name, class_name):
    global questions_data, current_question_index
    current_question_index = 0
    answers_log.clear()

    if not model or not book or not student_name or not class_name:
        return "# Будь ласка, заповніть усі поля!", []

    model_path = MODELS_PATH[model]
    book_filename = BOOKS[book]
    file_path = os.path.join("questions", model_path, book_filename)

    if not os.path.exists(file_path):
        return f"Файл за шляхом {file_path} не знайдено.", []

    with open(file_path, "r", encoding="utf-8") as file:
        questions_data = json.load(file)

    if questions_data:
        return get_question()
    else:
        return "У файлі немає питань.", []


def get_next_question(selected_answer):
    global current_question_index, answers_log, feedback_questions

    if not selected_answer:
        question_text, answers = get_question()
        return (
            question_text,  # question_radio
            gr.update(choices=answers, value=None, interactive=True, visible=True),  # answer_radio
            gr.update(visible=True),  # next_button
            gr.update(visible=False),  # feedback_input
            gr.update(visible=False),  # rating_slider
            gr.update(visible=False),  # submit_feedback_button
            gr.update(visible=False),  # rating_text
            gr.update(visible=False),  # question_correct
            gr.update(visible=False),  # answers_correct
            gr.update(visible=False),  # interesting_question
            gr.update(visible=False, value=""),  # feedback_questions_output
        )

    # Writing answer in log
    answers_log.append({
        "selected": selected_answer,
        "isCorrect": any(answer['answer'] == selected_answer and answer['isCorrect'] for answer in
                         questions_data[current_question_index]['answers'])
    })

    # Move to the next question
    current_question_index += 1
    if current_question_index < len(questions_data):
        question_text, answers = get_question()
        return (
            question_text,  # question_radio
            gr.update(choices=answers, value=None, interactive=True, visible=True),  # answer_radio
            gr.update(visible=True),  # next_button
            gr.update(visible=False),  # feedback_input
            gr.update(visible=False),  # rating_slider
            gr.update(visible=False),  # submit_feedback_button
            gr.update(visible=False),  # rating_text
            gr.update(visible=False),  # question_correct
            gr.update(visible=False),  # answers_correct
            gr.update(visible=False),  # interesting_question
            gr.update(visible=False, value=""),  # feedback_questions_output
        )
    else:
        # All questions are completed — ask for feedback
        question_text = "# Дякуємо за участь у тесті!\n# Передивіться тест та ваші відповіді\n# Залиште, будь ласка, свій відгук в кінці сторінки і оцініть тест.\n---"
        feedback_questions = prepare_questions_for_feedback(questions_data, answers_log)
        return (
            question_text,  # question_radio
            gr.update(visible=False, value=None),  # answer_radio
            gr.update(visible=False),  # next_button
            gr.update(visible=True),  # feedback_input
            gr.update(visible=True),  # rating_slider
            gr.update(visible=True),  # submit_feedback_button
            gr.update(visible=True),  # rating_text
            gr.update(visible=True),  # question_correct
            gr.update(visible=True),  # answers_correct
            gr.update(visible=True),  # interesting_question
            gr.update(visible=True, value=feedback_questions),  # feedback_questions_output
        )


def summarize_results(student_name,
                      class_name,
                      model,
                      book,
                      feedback,
                      rating,
                      question_correct,
                      answers_correct,
                      interesting_question):
    global questions_data, answers_log, feedback_questions
    questions = []

    if not feedback or question_correct is None or answers_correct is None or interesting_question is None or rating is None:
        return (
            "# Залиште відгук про тест!",  # question_output
            gr.update(visible=True),  # feedback_input
            gr.update(visible=True),  # rating_slider
            gr.update(visible=True),  # submit_feedback_button
            gr.update(visible=True),  # question_correct
            gr.update(visible=True),  # answers_correct
            gr.update(visible=True),  # interesting_question
            gr.update(visible=True),  # rating_text
            gr.update(visible=True, value=feedback_questions),  # feedback_questions_output
            gr.update(visible=True),  # feedback_not_provided
        )

    for question, answer in zip(questions_data, answers_log):
        questions.append({
            "question": question,
            "answer": answer
        })

    save_results(
        student_name,
        class_name,
        MODELS[model],
        book,
        questions,
        feedback,
        rating,
        question_correct,
        answers_correct,
        interesting_question
    )

    correct_answers_count = sum(1 for answer in answers_log if answer['isCorrect'])
    total_questions = len(questions_data)

    grade_12 = (correct_answers_count / total_questions) * 12

    summary = (
        f"# Усі питання пройдено!\n\n"
        f"## Ви відповіли правильно на {correct_answers_count} з {total_questions} питань.\n\n"
        f"## Оцінка за 12-бальною шкалою: {grade_12:.2f}.\n\n"
    )

    return (
        summary,  # question_output
        gr.update(visible=False, value=""),  # feedback_input
        gr.update(visible=False, value=None),  # rating_slider
        gr.update(visible=False),  # submit_feedback_button
        gr.update(visible=False, value=""),  # question_correct
        gr.update(visible=False, value=""),  # answers_correct
        gr.update(visible=False, value=""),  # interesting_question
        gr.update(visible=False),  # rating_text
        gr.update(visible=False, value=""),  # feedback_questions_output
        gr.update(visible=False),  # feedback_not_provided
    )


def prepare_questions_for_feedback(questions, answer_log):
    feedback = []

    for i, question in enumerate(questions):
        question_text = f"## Питання: {question['question']}."
        answers_text = "\n".join(
            [f"* {ans['answer']}" for ans in question['answers']]
        )
        user_answer = f"## Ваша відповідь:\n* {answer_log[i]['selected']}"

        feedback.append(f"{question_text}\n## Відповіді:\n{answers_text}\n{user_answer}\n---")

    return "\n".join(feedback)


with gr.Blocks() as demo:
    with gr.Column():
        gr.Markdown("# Оберіть модель та книгу, щоб завантажити питання")

        student_name_input = gr.Textbox(label="Ваше ім'я")
        class_name_input = gr.Textbox(label="Ваш клас")
        model_radio = gr.Radio(list(MODELS.keys()), label="Оберіть модель")
        book_radio = gr.Radio(list(BOOKS.keys()), label="Оберіть книгу")

        load_button = gr.Button("Завантажити питання")
        question_output = gr.Markdown(label="Питання")
        answer_radio = gr.Radio([], label="Варіанти відповіді", interactive=True, visible=False)
        next_button = gr.Button("Наступне питання", visible=False)

        feedback_questions_output = gr.Markdown(label="Пройдені питання", value="Nothing", visible=False)
        rating_text = gr.Markdown(
            "### Шкала оцінювання:\n\n#### -2 — дуже погано\n\n#### -1 — погано\n\n#### 0 — задовільно\n\n#### 1 — добре\n\n#### 2 — відмінно",
            visible=False)
        feedback_not_provided = gr.Markdown("# Заповніть поля відгуку та залишіть оцінку!", visible=False)
        question_correct_radio = gr.Radio([-2, -1, 0, 1, 2], label="Чи коректно поставлені запитання?", visible=False,
                                          interactive=True)
        answers_correct_radio = gr.Radio([-2, -1, 0, 1, 2], label="Чи коректно поставлені варіанти відповідей?",
                                         visible=False, interactive=True)
        interesting_question_radio = gr.Radio([-2, -1, 0, 1, 2], label="Чи цікаві були запитання?", visible=False,
                                              interactive=True)
        feedback_input = gr.Textbox(label="Будь-який коментар про тест (за бажанням)", visible=False)
        rating_buttons = gr.Radio([-2, -1, 0, 1, 2], label="Оцініть тест", visible=False, interactive=True)
        submit_feedback_button = gr.Button("Завершити тест", visible=False)


        def update_question(model, book, student_name, class_name):
            question, answers = load_questions(model, book, student_name, class_name)
            is_field_filled = len(answers) > 0
            return (
                question,  # question_output
                gr.update(choices=answers, interactive=True, visible=is_field_filled),  # answer_radio
                gr.update(visible=is_field_filled),  # next_button
                gr.update(visible=False, value=""),  # feedback_input
                gr.update(visible=False, value=None),  # rating_buttons
                gr.update(visible=False),  # submit_feedback_button
                gr.update(visible=False),  # rating_text
                gr.update(visible=False, value=""),  # question_correct
                gr.update(visible=False, value=""),  # answers_correct
                gr.update(visible=False, value=""),  # interesting_question
                gr.update(visible=False, value=""),  # feedback_questions_output
                gr.update(visible=False),  # feedback_not_provided
            )


        load_button.click(
            update_question,
            inputs=[
                model_radio,
                book_radio,
                student_name_input,
                class_name_input,
            ],
            outputs=[
                question_output,
                answer_radio,
                next_button,
                feedback_input,
                rating_buttons,
                submit_feedback_button,
                rating_text,
                question_correct_radio,
                answers_correct_radio,
                interesting_question_radio,
                feedback_questions_output,
                feedback_not_provided,
            ]
        )

        next_button.click(
            get_next_question,
            inputs=[answer_radio],
            outputs=[
                question_output,
                answer_radio,
                next_button,
                feedback_input,
                rating_buttons,
                submit_feedback_button,
                rating_text,
                question_correct_radio,
                answers_correct_radio,
                interesting_question_radio,
                feedback_questions_output,
            ]
        )

        submit_feedback_button.click(
            summarize_results,
            inputs=[
                student_name_input,
                class_name_input,
                model_radio,
                book_radio,
                feedback_input,
                rating_buttons,
                question_correct_radio,
                answers_correct_radio,
                interesting_question_radio,
            ],
            outputs=[
                question_output,
                feedback_input,
                rating_buttons,
                submit_feedback_button,
                question_correct_radio,
                answers_correct_radio,
                interesting_question_radio,
                rating_text,
                feedback_questions_output,
                feedback_not_provided,
            ]
        )

if __name__ == "__main__":
    demo.launch()