import json
import os
import random

import gradio as gr
from dotenv import load_dotenv

from constants import MODELS, MODELS_PATH, BOOKS, CLASSES, STUDENTS, MODEL_NAME_TO_CHOICE
from utils import save_results, get_test_by_student_class_book

load_dotenv()

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

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 {current_question_index + 1}/{len(questions_data)}:\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 student_name is None or class_name is None:
        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),  # 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),  # 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#### Нижче можете переглянути ваші та правильні відповіді\n#### Залиште, будь ласка, відгук про тест в кінці сторінки.\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),  # 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,
                      question_correct,
                      answers_correct,
                      interesting_question):
    global questions_data, answers_log, feedback_questions
    questions = []

    if question_correct is None or answers_correct is None or interesting_question is None:
        return (
            "### Залиште відгук про тест!",  # question_output
            gr.update(visible=True),  # feedback_input
            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
        })

    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

    save_results(
        student_name,
        class_name,
        MODELS[model],
        book,
        questions,
        feedback,
        question_correct,
        answers_correct,
        interesting_question,
        grade_12,
        correct_answers_count,
    )

    summary = (
        f"#### Тест для моделі {model} закінчено!\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),  # submit_feedback_button
        gr.update(visible=False, value=None),  # question_correct
        gr.update(visible=False, value=None),  # answers_correct
        gr.update(visible=False, value=None),  # 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']}"
        quote = f"#### Цитата: *{question['textPart']}*"
        user_answer = answer_log[i]['selected']
        answers_text = "\n".join(
            [
                f"- {'**(Правильна)**' if ans['isCorrect'] else ''} {'**(Обрана)**' if ans['answer'] == user_answer else ''} {ans['answer']}"
                for ans in question['answers']
            ]
        )

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

    return "\n".join(feedback)


def update_students(class_name):
    print('update_students')
    students = STUDENTS.get(class_name, [])
    return (
        gr.update(choices=students, value=None, visible=True),  # student_name_input
        gr.update(choices=[], value=None, visible=False),  # book_radio
        gr.update(choices=[], value=None, visible=False),  # model_radio
    )


def handle_student_name_change(student_name):
    print('handle_student_name_change')
    if not student_name:
        return (
            gr.update(choices=[], value=None, visible=False),  # book_radio
            gr.update(choices=[], value=None, visible=False),  # model_radio
        )

    return (
        gr.update(choices=list(BOOKS.keys()), value=None, visible=True),  # book_radio
        gr.update(choices=[], value=None, visible=False),  # model_radio
    )


def filter_models(student_name, class_name, book):
    print('filter_models')
    if not book:
        return gr.update(choices=[], value=None, visible=False)

    tests = get_test_by_student_class_book(student_name, class_name, book)
    available_models = list(MODELS.values())

    for test in tests:
        if test.get("model") in available_models:
            available_models.remove(test.get("model"))

    print("Available models (before update):", available_models)

    if not available_models:
        return gr.update(choices=[], label="Немає доступних моделей", value=None, visible=True)

    models_list = []

    for model in list(available_models):
        models_list.append(MODEL_NAME_TO_CHOICE.get(model))

    return gr.update(choices=models_list, value=None, visible=True)


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

        class_name_input = gr.Dropdown(choices=CLASSES, label="Ваш клас", value=None)
        student_name_input = gr.Dropdown(label="Ваше ім'я", value=None, visible=False)
        book_radio = gr.Radio([], label="Оберіть книгу", interactive=True, value=None, visible=False)
        model_radio = gr.Radio([], label="Оберіть модель", interactive=True, value=None, visible=False)
        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)
        submit_feedback_button = gr.Button("Завершити тест", visible=False)

        class_name_input.change(
            update_students,
            inputs=[
                class_name_input,
            ],
            outputs=[
                student_name_input,
                book_radio,
                model_radio,
            ]
        )

        student_name_input.change(
            handle_student_name_change,
            inputs=[
                student_name_input,
            ],
            outputs=[
                book_radio,
                model_radio,
            ]
        )

        book_radio.change(
            filter_models,
            inputs=[
                student_name_input,
                class_name_input,
                book_radio,
            ],
            outputs=[
                model_radio,
            ]
        )


        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),  # submit_feedback_button
                gr.update(visible=False),  # rating_text
                gr.update(visible=False, value=None),  # question_correct
                gr.update(visible=False, value=None),  # answers_correct
                gr.update(visible=False, value=None),  # 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,
                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,
                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,
                question_correct_radio,
                answers_correct_radio,
                interesting_question_radio,
            ],
            outputs=[
                question_output,
                feedback_input,
                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()