"""Schemas for scheduled task API."""

from datetime import datetime
from typing import Any

from pydantic import BaseModel, Field

from app.models.scheduled_task import RecurrenceType, TaskStatus, TaskType


class TaskFilterParams(BaseModel):
    """Query parameters for filtering tasks."""

    status: TaskStatus | None = Field(default=None, description="Filter by task status")
    task_type: TaskType | None = Field(default=None, description="Filter by task type")
    limit: int = Field(default=50, description="Maximum number of tasks to return")
    offset: int = Field(default=0, description="Number of tasks to skip")


class ScheduledTaskBase(BaseModel):
    """Base schema for scheduled tasks."""

    name: str = Field(description="Human-readable task name")
    task_type: TaskType = Field(description="Type of task to execute")
    scheduled_at: datetime = Field(description="When the task should be executed")
    timezone: str = Field(default="UTC", description="Timezone for scheduling")
    parameters: dict[str, Any] = Field(
        default_factory=dict,
        description="Task-specific parameters",
    )
    recurrence_type: RecurrenceType = Field(
        default=RecurrenceType.NONE,
        description="Recurrence pattern",
    )
    cron_expression: str | None = Field(
        default=None,
        description="Cron expression for custom recurrence",
    )
    recurrence_count: int | None = Field(
        default=None,
        description="Number of times to repeat (None for infinite)",
    )
    expires_at: datetime | None = Field(
        default=None,
        description="When the task expires (optional)",
    )


class ScheduledTaskCreate(ScheduledTaskBase):
    """Schema for creating a scheduled task."""



class ScheduledTaskUpdate(BaseModel):
    """Schema for updating a scheduled task."""

    name: str | None = None
    scheduled_at: datetime | None = None
    timezone: str | None = None
    parameters: dict[str, Any] | None = None
    is_active: bool | None = None
    expires_at: datetime | None = None


class ScheduledTaskResponse(ScheduledTaskBase):
    """Schema for scheduled task responses."""

    id: int
    status: TaskStatus
    user_id: int | None = None
    executions_count: int
    last_executed_at: datetime | None = None
    next_execution_at: datetime | None = None
    error_message: str | None = None
    is_active: bool
    created_at: datetime
    updated_at: datetime

    class Config:
        """Pydantic configuration."""

        from_attributes = True


# Task-specific parameter schemas
class CreditRechargeParameters(BaseModel):
    """Parameters for credit recharge tasks."""

    user_id: int | None = Field(
        default=None,
        description="Specific user ID to recharge (None for all users)",
    )


class PlaySoundParameters(BaseModel):
    """Parameters for play sound tasks."""

    sound_id: int = Field(description="ID of the sound to play")


class PlayPlaylistParameters(BaseModel):
    """Parameters for play playlist tasks."""

    playlist_id: int = Field(description="ID of the playlist to play")
    play_mode: str = Field(
        default="continuous",
        description="Play mode (continuous, loop, loop_one, random, single)",
    )
    shuffle: bool = Field(default=False, description="Whether to shuffle the playlist")


# Convenience schemas for creating specific task types
class CreateCreditRechargeTask(BaseModel):
    """Schema for creating credit recharge tasks."""

    name: str = "Credit Recharge"
    scheduled_at: datetime
    timezone: str = "UTC"
    recurrence_type: RecurrenceType = RecurrenceType.NONE
    cron_expression: str | None = None
    recurrence_count: int | None = None
    expires_at: datetime | None = None
    user_id: int | None = None

    def to_task_create(self) -> ScheduledTaskCreate:
        """Convert to generic task creation schema."""
        return ScheduledTaskCreate(
            name=self.name,
            task_type=TaskType.CREDIT_RECHARGE,
            scheduled_at=self.scheduled_at,
            timezone=self.timezone,
            parameters={"user_id": self.user_id},
            recurrence_type=self.recurrence_type,
            cron_expression=self.cron_expression,
            recurrence_count=self.recurrence_count,
            expires_at=self.expires_at,
        )


class CreatePlaySoundTask(BaseModel):
    """Schema for creating play sound tasks."""

    name: str
    scheduled_at: datetime
    sound_id: int
    timezone: str = "UTC"
    recurrence_type: RecurrenceType = RecurrenceType.NONE
    cron_expression: str | None = None
    recurrence_count: int | None = None
    expires_at: datetime | None = None

    def to_task_create(self) -> ScheduledTaskCreate:
        """Convert to generic task creation schema."""
        return ScheduledTaskCreate(
            name=self.name,
            task_type=TaskType.PLAY_SOUND,
            scheduled_at=self.scheduled_at,
            timezone=self.timezone,
            parameters={"sound_id": self.sound_id},
            recurrence_type=self.recurrence_type,
            cron_expression=self.cron_expression,
            recurrence_count=self.recurrence_count,
            expires_at=self.expires_at,
        )


class CreatePlayPlaylistTask(BaseModel):
    """Schema for creating play playlist tasks."""

    name: str
    scheduled_at: datetime
    playlist_id: int
    play_mode: str = "continuous"
    shuffle: bool = False
    timezone: str = "UTC"
    recurrence_type: RecurrenceType = RecurrenceType.NONE
    cron_expression: str | None = None
    recurrence_count: int | None = None
    expires_at: datetime | None = None

    def to_task_create(self) -> ScheduledTaskCreate:
        """Convert to generic task creation schema."""
        return ScheduledTaskCreate(
            name=self.name,
            task_type=TaskType.PLAY_PLAYLIST,
            scheduled_at=self.scheduled_at,
            timezone=self.timezone,
            parameters={
                "playlist_id": self.playlist_id,
                "play_mode": self.play_mode,
                "shuffle": self.shuffle,
            },
            recurrence_type=self.recurrence_type,
            cron_expression=self.cron_expression,
            recurrence_count=self.recurrence_count,
            expires_at=self.expires_at,
        )