import uuid

from django.conf import settings
from django.db import models


class MathIdentity(models.Model):
    code = models.CharField(max_length=8, unique=True)
    name = models.CharField(max_length=80)
    clan = models.CharField(max_length=40)
    mathematician = models.CharField(max_length=80)
    description = models.TextField(blank=True)
    initial_abilities = models.JSONField(default=dict, blank=True)
    portrait = models.CharField(max_length=200, blank=True)

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


class MathBTIAssessment(models.Model):
    version = models.CharField(max_length=30, unique=True)
    title = models.CharField(max_length=120)
    definition = models.JSONField()
    is_published = models.BooleanField(default=False)
    published_at = models.DateTimeField(null=True, blank=True)

    def __str__(self):
        return self.title


class MathBTIResult(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="mathbti_results")
    assessment = models.ForeignKey(MathBTIAssessment, on_delete=models.PROTECT)
    identity = models.ForeignKey(MathIdentity, on_delete=models.PROTECT)
    answers = models.JSONField(default=list)
    axis_scores = models.JSONField(default=dict)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ["-created_at"]


class Character(models.Model):
    slug = models.SlugField(unique=True)
    name = models.CharField(max_length=80)
    profile = models.TextField(blank=True)
    metadata = models.JSONField(default=dict, blank=True)

    def __str__(self):
        return self.name


class Story(models.Model):
    class Kind(models.TextChoices):
        FLAGSHIP = "flagship", "旗舰人生"
        SKILL = "skill", "人物 Skill"
        SPECIAL = "special", "特别篇"

    slug = models.SlugField(unique=True)
    title = models.CharField(max_length=120)
    summary = models.TextField(blank=True)
    kind = models.CharField(max_length=16, choices=Kind.choices, default=Kind.FLAGSHIP)
    estimated_minutes = models.PositiveIntegerField(default=20)
    is_visible = models.BooleanField(default=True)

    def __str__(self):
        return self.title


class StoryVersion(models.Model):
    story = models.ForeignKey(Story, on_delete=models.CASCADE, related_name="versions")
    version = models.PositiveIntegerField()
    content = models.JSONField()
    is_published = models.BooleanField(default=False)
    published_at = models.DateTimeField(null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=("story", "version"), name="unique_story_version")
        ]
        ordering = ["story", "-version"]

    def __str__(self):
        return f"{self.story} v{self.version}"


class StoryRun(models.Model):
    class Status(models.TextChoices):
        ACTIVE = "active", "进行中"
        COMPLETED = "completed", "已完成"
        ABANDONED = "abandoned", "已放弃"

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="story_runs")
    story_version = models.ForeignKey(StoryVersion, on_delete=models.PROTECT, related_name="runs")
    current_node = models.CharField(max_length=100)
    state = models.JSONField(default=dict)
    status = models.CharField(max_length=16, choices=Status.choices, default=Status.ACTIVE)
    ending_code = models.CharField(max_length=80, blank=True)
    started_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    completed_at = models.DateTimeField(null=True, blank=True)

    class Meta:
        ordering = ["-updated_at"]


class StoryChoice(models.Model):
    run = models.ForeignKey(StoryRun, on_delete=models.CASCADE, related_name="choices")
    sequence = models.PositiveIntegerField()
    idempotency_key = models.CharField(max_length=80, null=True, blank=True)
    node_id = models.CharField(max_length=100)
    choice_index = models.PositiveIntegerField()
    choice_text = models.CharField(max_length=300)
    effects = models.JSONField(default=dict, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=("run", "sequence"), name="unique_run_choice_sequence"),
            models.UniqueConstraint(
                fields=("run", "idempotency_key"), name="unique_run_choice_idempotency"
            ),
        ]
        ordering = ["sequence"]


class StoryMark(models.Model):
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        related_name="story_marks",
    )
    story = models.ForeignKey(
        Story,
        on_delete=models.CASCADE,
        related_name="collected_marks",
    )
    source_run = models.ForeignKey(
        StoryRun,
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="acquired_marks",
    )
    code = models.CharField(max_length=60)
    name = models.CharField(max_length=80)
    domain = models.CharField(max_length=40)
    acquired_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(
                fields=("user", "story", "code"),
                name="unique_user_story_mark",
            )
        ]
        ordering = ["acquired_at"]

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


class UserRelationship(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    character = models.ForeignKey(Character, on_delete=models.CASCADE)
    trust = models.SmallIntegerField(default=0)
    rivalry = models.SmallIntegerField(default=0)
    debt = models.SmallIntegerField(default=0)
    cooperation = models.SmallIntegerField(default=0)
    metadata = models.JSONField(default=dict, blank=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=("user", "character"), name="unique_user_character")
        ]


class SkillPackage(models.Model):
    story = models.OneToOneField(Story, on_delete=models.CASCADE, related_name="skill_package")
    real_person = models.CharField(max_length=120)
    historical_context = models.TextField()
    fact_sources = models.JSONField(default=list)
    fictional_scope = models.TextField()
    creator = models.CharField(max_length=120)