"""Pydantic schemas for API request/response."""
from __future__ import annotations

from datetime import datetime
from typing import Any, Dict, List, Optional
from uuid import UUID

from pydantic import BaseModel, ConfigDict, EmailStr, Field


# === Auth ===
class UserRegister(BaseModel):
    email: EmailStr
    username: str = Field(min_length=3, max_length=64)
    password: str = Field(min_length=6, max_length=128)


class UserLogin(BaseModel):
    # Accepts either email or username — the backend resolves it.
    login: str
    password: str


class UserOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    email: EmailStr
    username: str
    is_admin: bool
    is_active: bool
    preferred_language: str
    created_at: datetime


class TokenOut(BaseModel):
    access_token: str
    token_type: str = "bearer"
    user: UserOut


class AdminSetupRequest(BaseModel):
    token: str
    email: EmailStr
    username: str = Field(min_length=3, max_length=64)
    password: str = Field(min_length=6, max_length=128)


# === Settings ===
class SettingsUpdate(BaseModel):
    values: Dict[str, Any]


class SettingsOut(BaseModel):
    values: Dict[str, Any]
    editable_keys: List[str]


# === Presets ===
class PresetOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    slug: str
    title: str
    description: Optional[str] = None
    language: str
    is_public: bool
    is_builtin: bool
    payload: Dict[str, Any]
    created_at: datetime


class PresetCreate(BaseModel):
    slug: str
    title: str
    description: Optional[str] = None
    language: str = "en"
    is_public: bool = True
    payload: Dict[str, Any]


# === Worlds ===
class WorldCreate(BaseModel):
    name: str = Field(min_length=1, max_length=255)
    language: str = "en"
    preset_id: Optional[UUID] = None


class WorldDefinition(BaseModel):
    setting_description: str = ""
    rules: Dict[str, Any] = Field(default_factory=dict)
    world_schema: Dict[str, Any] = Field(default_factory=dict)
    plot_rails: Dict[str, Any] = Field(default_factory=dict)
    initial_state: Dict[str, Any] = Field(default_factory=dict)
    initial_time: Optional[str] = None


class WorldOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    owner_id: UUID
    name: str
    language: str
    definition: Dict[str, Any]
    state: Dict[str, Any]
    current_time: Optional[str]
    status: str
    preset_id: Optional[UUID] = None
    created_at: datetime
    updated_at: datetime


class WorldUpdate(BaseModel):
    name: Optional[str] = None
    definition: Optional[Dict[str, Any]] = None
    state: Optional[Dict[str, Any]] = None
    current_time: Optional[str] = None
    status: Optional[str] = None


# === World Builder ===
class WorldBuilderStart(BaseModel):
    """Kick off a new world-building conversation."""
    world_name: str = Field(min_length=1, max_length=255)
    language: str = "en"
    # Either pick a preset to start from, or fill the freeform brief.
    preset_id: Optional[UUID] = None
    setting_brief: str = ""
    character_brief: str = ""
    rules_brief: str = ""
    notes: str = ""


class WorldBuilderMessage(BaseModel):
    """User reply in the world-builder dialogue."""
    session_id: UUID
    message: str


class WorldBuilderReply(BaseModel):
    """AI reply in the world-builder dialogue."""
    session_id: UUID
    turn: int
    ai_message: str
    proposed_definition: Optional[WorldDefinition] = None
    is_final: bool = False  # True when AI thinks world is ready to commit
    followup_questions: List[str] = Field(default_factory=list)


class WorldBuilderCommit(BaseModel):
    """User accepts the proposed world definition and creates the world."""
    session_id: UUID
    name: Optional[str] = None


# === Sessions ===
class SessionOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    world_id: UUID
    title: str
    is_active: bool
    created_at: datetime
    last_played_at: Optional[datetime] = None


class SessionCreate(BaseModel):
    world_id: UUID
    title: Optional[str] = None


# === Messages ===
class MessageOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    seq: int
    role: str
    kind: str
    content: str
    payload: Dict[str, Any]
    is_pinned: bool
    hidden: bool
    created_at: datetime


# === Iteration ===
class IterationRequest(BaseModel):
    """Player submits an action/choice for the next iteration."""
    session_id: UUID
    action_text: str = Field(min_length=1, max_length=4000)


class IterationEvent(BaseModel):
    """SSE event sent to the frontend during an iteration."""
    type: str  # status / plan / tool_call / tool_result / narrative_chunk / step_complete / error / done
    data: Dict[str, Any] = Field(default_factory=dict)


# === Glossary ===
class GlossaryEntryOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    kind: str
    name: str
    description: str
    payload: Dict[str, Any]


# === LLM Logs ===
class LlmLogOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    purpose: str
    model: str
    base_url: str
    prompt_tokens: Optional[int]
    completion_tokens: Optional[int]
    total_tokens: Optional[int]
    latency_ms: Optional[int]
    error: Optional[str]
    created_at: datetime


# === Triggers ===
class TriggerOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    session_id: UUID
    fire_at: str
    description: str
    payload: Dict[str, Any]
    fired: bool
    created_at: datetime


class TriggerCreate(BaseModel):
    session_id: UUID
    fire_at: str
    description: str
    payload: Dict[str, Any] = Field(default_factory=dict)



# === World Editor (AI-assisted editing of an existing world) ===
class WorldEditorChatRequest(BaseModel):
    message: str = Field(min_length=1, max_length=4000)


class WorldEditorChatReply(BaseModel):
    ai_message: str
    definition: Optional[Dict[str, Any]] = None
    changed: bool = False