"""Pydantic request/response models for the platform SDK REST API."""

from __future__ import annotations

from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, Field


class TaskConstraintsModel(BaseModel):
    driver_type: str | None = None
    capability_tags: list[str] = Field(default_factory=list)
    target_host_id: str | None = Field(default=None, min_length=1)
    target_device_id: str | None = Field(default=None, min_length=1)


class TaskSubmissionRequest(BaseModel):
    goal: str | None = None
    workflow_definition_id: str | None = None
    constraints: TaskConstraintsModel = Field(default_factory=TaskConstraintsModel)


class TaskSubmissionResponse(BaseModel):
    task_id: str


class TaskStatusResponse(BaseModel):
    id: str
    status: str
    goal: str | None = None
    workflow_definition_id: str | None = None
    assigned_device_id: str | None = None
    assigned_host_id: str | None = None
    attempt_count: int = 0
    lease_expires_at: datetime | None = None
    failure_reason: str | None = None
    target_host_id: str | None = None
    target_device_id: str | None = None


class TaskListItem(BaseModel):
    id: str
    status: str
    goal: str | None = None
    workflow_definition_id: str | None = None
    assigned_device_id: str | None = None
    assigned_host_id: str | None = None
    attempt_count: int = 0
    failure_reason: str | None = None
    target_host_id: str | None = None
    target_device_id: str | None = None
    created_at: datetime


class TaskListResponse(BaseModel):
    items: list[TaskListItem]
    total: int
    limit: int
    offset: int


class TaskAttemptResponse(BaseModel):
    task_id: str
    attempt: int
    lease_id: str
    host_id: str
    device_id: str
    status: str
    lease_expires_at: datetime
    created_at: datetime
    completed_at: datetime | None = None
    failure_reason: str | None = None
    terminal_result: dict[str, Any] | None = None


class DeviceResponse(BaseModel):
    device_id: str
    host_id: str
    driver_type: str
    status: str
    capability_tags: list[str] = Field(default_factory=list)


class HostResponse(BaseModel):
    host_id: str
    address: str | None = None
    last_seen_at: str
    planner_transport: Literal["direct", "cloud"] = "direct"


class PluginRegistrationRequest(BaseModel):
    name: str
    version: str
    entry_point_kind: Literal["driver", "tool", "skill"]
    target: str


class PluginResponse(BaseModel):
    name: str
    version: str
    entry_point_kind: str
    target: str
    wired: bool


class LoginRequest(BaseModel):
    username: str = Field(min_length=1, max_length=64)
    password: str = Field(min_length=1, max_length=256)


class PasswordChangeRequest(BaseModel):
    current_password: str = Field(min_length=1, max_length=256)
    new_password: str = Field(min_length=1, max_length=256)


class UserResponse(BaseModel):
    id: str
    username: str
    display_name: str
    role: Literal["viewer", "operator", "admin"]
    enabled: bool
    must_change_password: bool
    scopes: list[str]
    created_at: datetime
    updated_at: datetime
    last_login_at: datetime | None = None


class UserListResponse(BaseModel):
    items: list[UserResponse]
    limit: int
    offset: int


class UserCreateRequest(BaseModel):
    username: str = Field(min_length=1, max_length=64)
    display_name: str = Field(min_length=1, max_length=120)
    role: Literal["viewer", "operator", "admin"]
    password: str = Field(min_length=1, max_length=256)


class UserUpdateRequest(BaseModel):
    display_name: str | None = Field(default=None, min_length=1, max_length=120)
    role: Literal["viewer", "operator", "admin"] | None = None
    enabled: bool | None = None


class PasswordResetRequest(BaseModel):
    password: str = Field(min_length=1, max_length=256)


class ErrorResponse(BaseModel):
    detail: str


class DeviceTargetModel(BaseModel):
    host_id: str = Field(min_length=1)
    device_id: str = Field(min_length=1)


class UserSubmissionPolicyRequest(BaseModel):
    submission_enabled: bool = True
    allowed_host_ids: list[str] | None = None
    allowed_device_targets: list[DeviceTargetModel] | None = None
    expected_revision: int | None = Field(default=None, ge=0)


class UserSubmissionPolicyResponse(BaseModel):
    user_id: str
    revision: int
    submission_enabled: bool
    allowed_host_ids: list[str] | None = None
    allowed_device_targets: list[DeviceTargetModel] | None = None
    updated_at: datetime


class HostGovernancePolicyRequest(BaseModel):
    self_submission_enabled: bool = True
    max_active_tasks: int | None = Field(default=None, ge=1)
    daily_token_budget: int | None = Field(default=None, ge=1)
    expected_revision: int | None = Field(default=None, ge=0)


class HostGovernancePolicyResponse(BaseModel):
    host_id: str
    revision: int
    self_submission_enabled: bool
    max_active_tasks: int | None = None
    daily_token_budget: int | None = None
    updated_at: datetime


class HostTokenUsageSummaryResponse(BaseModel):
    host_id: str
    usage_day: str
    daily_token_budget: int | None = None
    used_tokens: int
    reserved_tokens: int
    remaining_tokens: int | None = None


class TokenUsageEventResponse(BaseModel):
    id: str
    host_id: str
    usage_day: str
    task_id: str | None = None
    attempt: int | None = None
    provider: str
    model: str
    input_tokens: int | None = None
    output_tokens: int | None = None
    total_tokens: int
    occurred_at: datetime