from django.db import models


## Модуль Анкетирование (название приложения: surveys)

class Survey(models.Model):
    title = models.CharField(max_length=70, verbose_name="Название опроса")

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = "Опрос"
        verbose_name_plural = "Опросы"
        ordering = ["title"]


class ScoreVariable(models.Model):
    name = models.CharField(max_length=30, verbose_name="Имя переменной")
    title = models.CharField(max_length=70, verbose_name="Название переменной")
    description = models.TextField(verbose_name="Описание")
    survey = models.ForeignKey(
        Survey, on_delete=models.CASCADE, verbose_name="Опрос"
    )

    def __str__(self):
        return f"{self.title} ({self.survey})"

    class Meta:
        verbose_name = "Переменная оценки"
        verbose_name_plural = "Переменные оценки"
        ordering = ["survey", "name", "title"]


class Statement(models.Model):
    statement = models.CharField(max_length=256, verbose_name="Утверждение")
    score_variable = models.ForeignKey(
        ScoreVariable, on_delete=models.SET_NULL, blank=True, null=True, verbose_name="Переменная оценки"
    )

    def __str__(self):
        return self.statement

    class Meta:
        verbose_name = "Утверждение"
        verbose_name_plural = "Утверждения"
        ordering = ["statement", "score_variable"]


class QuestionPair(models.Model):
    survey = models.ForeignKey(
        Survey, on_delete=models.CASCADE, verbose_name="Опрос"
    )
    statement_a = models.OneToOneField(
        Statement, on_delete=models.CASCADE, related_name="pair_a", verbose_name="Утверждение A"
    )
    statement_b = models.OneToOneField(
        Statement, on_delete=models.CASCADE, related_name="pair_b", verbose_name="Утверждение B"
    )

    def __str__(self):
        return f"Пара: {self.statement_a} - {self.statement_b}"

    class Meta:
        verbose_name = "Пара вопросов"
        verbose_name_plural = "Пары вопросов"
        ordering = ["survey", "statement_a", "statement_b"]


class AgreementQuestion(models.Model):
    survey = models.ForeignKey(
        Survey, on_delete=models.CASCADE, verbose_name="Опрос"
    )
    question = models.CharField(max_length=256, verbose_name="Вопрос")
    score_variable = models.ForeignKey(
        ScoreVariable, on_delete=models.CASCADE, verbose_name="Переменная оценки"
    )

    def __str__(self):
        return self.question

    class Meta:
        verbose_name = "Вопрос на согласие"
        verbose_name_plural = "Вопросы на согласие"
        ordering = ["survey", "question"]


class EducationalInstitution(models.Model):
    name = models.CharField(max_length=256, verbose_name="Название учреждения")

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = "Образовательное учреждение"
        verbose_name_plural = "Образовательные учреждения"
        ordering = ["name"]


class Profession(models.Model):
    name = models.CharField(max_length=256, verbose_name="Название профессии")
    description = models.TextField(blank=True, null=True, verbose_name="Описание")

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = "Профессия"
        verbose_name_plural = "Профессии"
        ordering = ["name"]


class Specialty(models.Model):
    name = models.CharField(max_length=256, verbose_name="Название специальности")
    institution = models.ForeignKey(
        EducationalInstitution, on_delete=models.CASCADE, verbose_name="Образовательное учреждение"
    )
    link = models.URLField(verbose_name="Ссылка", null=True, blank=True)

    def __str__(self):
        return f"{self.name} ({self.institution})"

    class Meta:
        verbose_name = "Специальность"
        verbose_name_plural = "Специальности"
        ordering = ["name", "institution"]


class ProfessionSpecialtyLink(models.Model):
    profession = models.ForeignKey(
        Profession, on_delete=models.CASCADE, verbose_name="Профессия"
    )
    specialty = models.ForeignKey(
        Specialty, on_delete=models.CASCADE, verbose_name="Специальность"
    )

    def __str__(self):
        return f"{self.profession} - {self.specialty}"

    class Meta:
        verbose_name = "Связь между профессией и специальностью"
        verbose_name_plural = "Связи между профессиями и специальностями"
        unique_together = ("profession", "specialty")
        ordering = ["profession", "specialty"]


class ProfessionTestResult(models.Model):
    profession = models.ForeignKey(
        Profession, on_delete=models.CASCADE, verbose_name="Профессия"
    )
    survey_score_variable = models.ForeignKey(
        ScoreVariable, on_delete=models.CASCADE, verbose_name="Переменная оценки"
    )

    def __str__(self):
        return f"{self.profession} - {self.survey_score_variable}"

    class Meta:
        verbose_name = "Результат теста по профессии"
        verbose_name_plural = "Результаты тестов по профессиям"
        ordering = ["profession", "survey_score_variable"]