from django.db import models
from django.core.exceptions import ValidationError
from django.core.validators import MinValueValidator, MaxValueValidator
from modelcluster.fields import ParentalManyToManyField
from wagtail.models import Page
from wagtail.admin.panels import FieldPanel, MultiFieldPanel
from wagtail.fields import RichTextField
from wagtail.snippets.models import register_snippet


class ScenarioIndexPage(Page):
    parent_page_types = ["home.HomePage"]
    subpage_types = ["core.ScenarioPage"]
    max_count = 1

    content_panels = Page.content_panels

    class Meta:
        verbose_name = "Scenario Index"


class ScenarioPage(Page):
    parent_page_types = ["core.ScenarioIndexPage"]
    subpage_types = []

    content_panels = Page.content_panels

    class Meta:
        verbose_name = "Scenario"


@register_snippet
class Language(models.Model):
    name = models.CharField(max_length=50, unique=True)
    slug = models.SlugField(max_length=50, unique=True)

    panels = [
        FieldPanel("name"),
        FieldPanel("slug"),
    ]

    class Meta:
        ordering = ["name"]
        verbose_name = "Language"
        verbose_name_plural = "Languages"

    def __str__(self):
        return self.name


@register_snippet
class Framework(models.Model):
    name = models.CharField(max_length=50, unique=True)
    slug = models.SlugField(max_length=50, unique=True)

    panels = [
        FieldPanel("name"),
        FieldPanel("slug"),
    ]

    class Meta:
        ordering = ["name"]
        verbose_name = "Framework"
        verbose_name_plural = "Frameworks"

    def __str__(self):
        return self.name


@register_snippet
class DatabaseOption(models.Model):
    name = models.CharField(max_length=50, unique=True)
    slug = models.SlugField(max_length=50, unique=True)

    panels = [
        FieldPanel("name"),
        FieldPanel("slug"),
    ]

    class Meta:
        ordering = ["name"]
        verbose_name = "Database Option"
        verbose_name_plural = "Database Options"

    def __str__(self):
        return self.name


@register_snippet
class SkeletonFeature(models.Model):
    name = models.CharField(max_length=50, unique=True)
    slug = models.SlugField(max_length=50, unique=True)

    panels = [
        FieldPanel("name"),
        FieldPanel("slug"),
    ]

    class Meta:
        ordering = ["name"]
        verbose_name = "Skeleton Feature"
        verbose_name_plural = "Skeleton Features"

    def __str__(self):
        return self.name


class ProjectIndexPage(Page):
    parent_page_types = ["home.HomePage"]
    subpage_types = ["core.SkeletonProjectPage"]
    max_count = 1

    content_panels = Page.content_panels

    class Meta:
        verbose_name = "Project Index"


class SkeletonProjectPage(Page):
    MATURITY_CHOICES = [
        ("experimental", "Experimental"),
        ("stable", "Stable"),
        ("mature", "Mature"),
    ]
    MAINTENANCE_CHOICES = [
        ("active", "Active"),
        ("slow", "Slow"),
        ("unknown", "Unknown"),
        ("archived", "Archived"),
    ]

    summary = models.TextField()
    github_url = models.URLField()
    official_url = models.URLField(blank=True)
    license_name = models.CharField(max_length=100, blank=True)

    scenarios = ParentalManyToManyField("core.ScenarioPage", blank=False)
    languages = ParentalManyToManyField("core.Language", blank=False)
    frameworks = ParentalManyToManyField("core.Framework", blank=True)
    databases = ParentalManyToManyField("core.DatabaseOption", blank=True)
    features = ParentalManyToManyField("core.SkeletonFeature", blank=True)

    maturity = models.CharField(max_length=20, choices=MATURITY_CHOICES)
    maintenance_status = models.CharField(
        max_length=20, choices=MAINTENANCE_CHOICES, default="unknown"
    )

    structure_score = models.IntegerField(
        validators=[MinValueValidator(0), MaxValueValidator(5)]
    )
    docs_score = models.IntegerField(
        validators=[MinValueValidator(0), MaxValueValidator(5)]
    )
    tests_score = models.IntegerField(
        validators=[MinValueValidator(0), MaxValueValidator(5)]
    )
    example_score = models.IntegerField(
        validators=[MinValueValidator(0), MaxValueValidator(5)]
    )
    dependency_score = models.IntegerField(
        validators=[MinValueValidator(0), MaxValueValidator(5)]
    )
    incremental_score = models.IntegerField(
        validators=[MinValueValidator(0), MaxValueValidator(5)]
    )

    recommended_for = RichTextField()
    not_recommended_for = RichTextField(blank=True)
    review_notes = RichTextField(blank=True)

    is_featured = models.BooleanField(default=False)
    is_sponsored = models.BooleanField(default=False)

    parent_page_types = ["core.ProjectIndexPage"]
    subpage_types = []

    @property
    def total_score(self):
        return (
            self.structure_score
            + self.docs_score
            + self.tests_score
            + self.example_score
            + self.dependency_score
            + self.incremental_score
        )

    content_panels = Page.content_panels + [
        MultiFieldPanel(
            [
                FieldPanel("summary"),
                FieldPanel("github_url"),
                FieldPanel("official_url"),
                FieldPanel("license_name"),
            ],
            heading="Basic Info",
        ),
        MultiFieldPanel(
            [
                FieldPanel("scenarios"),
                FieldPanel("languages"),
                FieldPanel("frameworks"),
                FieldPanel("databases"),
                FieldPanel("features"),
                FieldPanel("maturity"),
                FieldPanel("maintenance_status"),
            ],
            heading="Classification",
        ),
        MultiFieldPanel(
            [
                FieldPanel("structure_score"),
                FieldPanel("docs_score"),
                FieldPanel("tests_score"),
                FieldPanel("example_score"),
                FieldPanel("dependency_score"),
                FieldPanel("incremental_score"),
            ],
            heading="Scores",
        ),
        MultiFieldPanel(
            [
                FieldPanel("recommended_for"),
                FieldPanel("not_recommended_for"),
                FieldPanel("review_notes"),
            ],
            heading="Review Content",
        ),
        MultiFieldPanel(
            [
                FieldPanel("is_featured"),
                FieldPanel("is_sponsored"),
            ],
            heading="Display Options",
        ),
    ]

    def clean(self):
        super().clean()
        if self.id is not None:
            errors = {}
            if not self.scenarios.exists():
                errors["scenarios"] = ValidationError(
                    "At least one scenario is required."
                )
            if not self.languages.exists():
                errors["languages"] = ValidationError(
                    "At least one language is required."
                )
            if errors:
                raise ValidationError(errors)

    class Meta:
        verbose_name = "Skeleton Project"


class ArticleIndexPage(Page):
    parent_page_types = ["home.HomePage"]
    subpage_types = ["core.ArticlePage"]
    max_count = 1

    content_panels = Page.content_panels

    class Meta:
        verbose_name = "Article Index"


class ArticlePage(Page):
    body = RichTextField()
    related_projects = ParentalManyToManyField(
        "core.SkeletonProjectPage", blank=True
    )

    parent_page_types = ["core.ArticleIndexPage"]
    subpage_types = []

    content_panels = Page.content_panels + [
        FieldPanel("body"),
        FieldPanel("related_projects"),
    ]

    class Meta:
        verbose_name = "Article"