"""Fractafrag — Pydantic Request/Response Schemas."""

from __future__ import annotations
from datetime import datetime
from uuid import UUID
from typing import Optional
from pydantic import BaseModel, EmailStr, Field, ConfigDict


# ════════════════════════════════════════════════════════════
# AUTH
# ════════════════════════════════════════════════════════════

class UserRegister(BaseModel):
    username: str = Field(..., min_length=3, max_length=30, pattern=r"^[a-zA-Z0-9_-]+$")
    email: EmailStr
    password: str = Field(..., min_length=8, max_length=128)
    turnstile_token: str


class UserLogin(BaseModel):
    email: EmailStr
    password: str
    turnstile_token: str


class TokenResponse(BaseModel):
    access_token: str
    token_type: str = "bearer"


class UserPublic(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: UUID
    username: str
    role: str
    subscription_tier: str
    is_verified_creator: bool
    created_at: datetime


class UserMe(UserPublic):
    email: str
    ai_credits_remaining: int
    trust_tier: str
    last_active_at: Optional[datetime] = None


# ════════════════════════════════════════════════════════════
# SHADERS
# ════════════════════════════════════════════════════════════

class ShaderCreate(BaseModel):
    title: str = Field(..., min_length=1, max_length=120)
    description: Optional[str] = Field(None, max_length=1000)
    glsl_code: str = Field(..., min_length=10)
    tags: list[str] = Field(default_factory=list, max_length=10)
    shader_type: str = Field(default="2d", pattern=r"^(2d|3d|audio-reactive)$")
    is_public: bool = True
    style_metadata: Optional[dict] = None
    fulfills_desire_id: Optional[UUID] = None


class ShaderUpdate(BaseModel):
    title: Optional[str] = Field(None, min_length=1, max_length=120)
    description: Optional[str] = Field(None, max_length=1000)
    glsl_code: Optional[str] = Field(None, min_length=10)
    tags: Optional[list[str]] = None
    is_public: Optional[bool] = None


class ShaderPublic(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: UUID
    author_id: Optional[UUID]
    title: str
    description: Optional[str]
    glsl_code: str
    is_public: bool
    is_ai_generated: bool
    ai_provider: Optional[str]
    thumbnail_url: Optional[str]
    preview_url: Optional[str]
    render_status: str
    style_metadata: Optional[dict]
    tags: list[str]
    shader_type: str
    forked_from: Optional[UUID]
    view_count: int
    score: float
    created_at: datetime
    updated_at: datetime


class ShaderFeedItem(BaseModel):
    """Lighter shader representation for feed responses."""
    model_config = ConfigDict(from_attributes=True)

    id: UUID
    author_id: Optional[UUID]
    title: str
    thumbnail_url: Optional[str]
    preview_url: Optional[str]
    glsl_code: str
    tags: list[str]
    shader_type: str
    score: float
    view_count: int
    is_ai_generated: bool
    style_metadata: Optional[dict]
    created_at: datetime


# ════════════════════════════════════════════════════════════
# VOTES & ENGAGEMENT
# ════════════════════════════════════════════════════════════

class VoteCreate(BaseModel):
    value: int = Field(..., ge=-1, le=1)


class DwellReport(BaseModel):
    shader_id: UUID
    dwell_secs: float = Field(..., gt=0)
    replayed: bool = False
    session_id: Optional[str] = None


# ════════════════════════════════════════════════════════════
# DESIRES / BOUNTIES
# ════════════════════════════════════════════════════════════

class DesireCreate(BaseModel):
    prompt_text: str = Field(..., min_length=5, max_length=500)
    style_hints: Optional[dict] = None


class DesirePublic(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: UUID
    author_id: Optional[UUID]
    prompt_text: str
    style_hints: Optional[dict]
    tip_amount_cents: int
    status: str
    heat_score: float
    fulfilled_by_shader: Optional[UUID]
    fulfilled_at: Optional[datetime]
    created_at: datetime


# ════════════════════════════════════════════════════════════
# AI GENERATION
# ════════════════════════════════════════════════════════════

class GenerateRequest(BaseModel):
    prompt: str = Field(..., min_length=5, max_length=500)
    provider: Optional[str] = None  # anthropic, openai, ollama — auto-selected if None
    style_metadata: Optional[dict] = None


class GenerateStatusResponse(BaseModel):
    job_id: str
    status: str  # queued, generating, rendering, complete, failed
    shader_id: Optional[UUID] = None
    error: Optional[str] = None


# ════════════════════════════════════════════════════════════
# API KEYS
# ════════════════════════════════════════════════════════════

class ApiKeyCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=100)


class ApiKeyPublic(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: UUID
    key_prefix: str
    name: Optional[str]
    trust_tier: str
    rate_limit_per_hour: int
    last_used_at: Optional[datetime]
    created_at: datetime


class ApiKeyCreated(ApiKeyPublic):
    """Returned only on creation — includes the full key (shown once)."""
    full_key: str


# ════════════════════════════════════════════════════════════
# PAGINATION
# ════════════════════════════════════════════════════════════

class PaginatedResponse(BaseModel):
    items: list
    cursor: Optional[str] = None
    has_more: bool = False