from django.db import models

from apps.common.models import TeamOwnedModel, TimeStampedModel


class ModelProvider(TimeStampedModel):
    class Status(models.TextChoices):
        ACTIVE = "active", "Active"
        DISABLED = "disabled", "Disabled"

    name = models.CharField(max_length=64, unique=True)
    display_name = models.CharField(max_length=128)
    status = models.CharField(max_length=24, choices=Status.choices, default=Status.ACTIVE)
    base_url = models.URLField(blank=True)
    metadata = models.JSONField(default=dict, blank=True)

    def __str__(self) -> str:
        return self.display_name


class ModelConfig(TimeStampedModel):
    class Capability(models.TextChoices):
        TEXT = "text", "Text"
        IMAGE = "image", "Image"
        VIDEO = "video", "Video"
        VISION = "vision", "Vision"
        EXPORT = "export", "Export"

    class Status(models.TextChoices):
        ACTIVE = "active", "Active"
        DISABLED = "disabled", "Disabled"

    provider = models.ForeignKey(ModelProvider, on_delete=models.CASCADE, related_name="models")
    name = models.CharField(max_length=128)
    display_name = models.CharField(max_length=128)
    capability = models.CharField(max_length=32, choices=Capability.choices)
    endpoint = models.CharField(max_length=255, blank=True)
    unit_price = models.DecimalField(max_digits=12, decimal_places=4, default=0)
    status = models.CharField(max_length=24, choices=Status.choices, default=Status.ACTIVE)
    rate_limit_per_minute = models.PositiveIntegerField(default=60)
    metadata = models.JSONField(default=dict, blank=True)

    class Meta:
        unique_together = [("provider", "name", "capability")]

    def __str__(self) -> str:
        return f"{self.provider.name}:{self.name}:{self.capability}"


class AITask(TeamOwnedModel):
    class Type(models.TextChoices):
        SCRIPT_GENERATION = "script_generation", "Script Generation"
        SCRIPT_OPTIMIZATION = "script_optimization", "Script Optimization"
        PRODUCT_IMAGE = "product_image", "Product Image"
        PERSON_IMAGE = "person_image", "Person Image"
        SCENE_IMAGE = "scene_image", "Scene Image"
        STORYBOARD = "storyboard", "Storyboard"
        VIDEO_SEGMENT = "video_segment", "Video Segment"
        EXPORT = "export", "Export"

    class Status(models.TextChoices):
        CREATED = "created", "Created"
        RESERVED = "reserved", "Reserved"
        SUBMITTED = "submitted", "Submitted"
        POLLING = "polling", "Polling"
        POSTPROCESSING = "postprocessing", "Postprocessing"
        SUCCEEDED = "succeeded", "Succeeded"
        FAILED = "failed", "Failed"
        COMPENSATING = "compensating", "Compensating"
        CANCELLED = "cancelled", "Cancelled"

    project = models.ForeignKey(
        "projects.Project",
        on_delete=models.CASCADE,
        null=True,
        blank=True,
        related_name="ai_tasks",
    )
    task_type = models.CharField(max_length=48, choices=Type.choices)
    status = models.CharField(max_length=32, choices=Status.choices, default=Status.CREATED)
    model_config = models.ForeignKey(ModelConfig, on_delete=models.PROTECT, related_name="tasks")
    idempotency_key = models.CharField(max_length=128, unique=True)
    provider_task_id = models.CharField(max_length=255, blank=True)
    request_payload = models.JSONField(default=dict, blank=True)
    response_payload = models.JSONField(default=dict, blank=True)
    estimated_cost = models.DecimalField(max_digits=12, decimal_places=4, default=0)
    actual_cost = models.DecimalField(max_digits=12, decimal_places=4, default=0)
    error_code = models.CharField(max_length=64, blank=True)
    error_message = models.TextField(blank=True)
    submitted_at = models.DateTimeField(null=True, blank=True)
    completed_at = models.DateTimeField(null=True, blank=True)

    class Meta:
        indexes = [
            models.Index(fields=["team", "status"]),
            models.Index(fields=["project", "task_type"]),
            models.Index(fields=["provider_task_id"]),
        ]

    def __str__(self) -> str:
        return f"{self.task_type}:{self.status}:{self.id}"