"""
Worksheet Editor Models — Enums, Pydantic models, and configuration.
"""

import os
import logging
from typing import Optional, List, Dict
from enum import Enum

from pydantic import BaseModel, Field

logger = logging.getLogger(__name__)

# =============================================
# CONFIGURATION
# =============================================

OLLAMA_URL = os.getenv("OLLAMA_URL", "http://host.docker.internal:11434")
SD_MODEL = os.getenv("SD_MODEL", "stable-diffusion")  # or specific SD model
WORKSHEET_STORAGE_DIR = os.getenv("WORKSHEET_STORAGE_DIR",
    os.path.join(os.path.dirname(os.path.abspath(__file__)), "worksheet-storage"))

# Ensure storage directory exists
os.makedirs(WORKSHEET_STORAGE_DIR, exist_ok=True)

# =============================================
# ENUMS & MODELS
# =============================================

class AIImageStyle(str, Enum):
    REALISTIC = "realistic"
    CARTOON = "cartoon"
    SKETCH = "sketch"
    CLIPART = "clipart"
    EDUCATIONAL = "educational"

class WorksheetStatus(str, Enum):
    DRAFT = "draft"
    PUBLISHED = "published"
    ARCHIVED = "archived"

# Style prompt modifiers
STYLE_PROMPTS = {
    AIImageStyle.REALISTIC: "photorealistic, high detail, professional photography",
    AIImageStyle.CARTOON: "cartoon style, colorful, child-friendly, simple shapes",
    AIImageStyle.SKETCH: "pencil sketch, hand-drawn, black and white, artistic",
    AIImageStyle.CLIPART: "clipart style, flat design, simple, vector-like",
    AIImageStyle.EDUCATIONAL: "educational illustration, clear, informative, textbook style"
}

# =============================================
# REQUEST/RESPONSE MODELS
# =============================================

class AIImageRequest(BaseModel):
    prompt: str = Field(..., min_length=3, max_length=500)
    style: AIImageStyle = AIImageStyle.EDUCATIONAL
    width: int = Field(512, ge=256, le=1024)
    height: int = Field(512, ge=256, le=1024)

class AIImageResponse(BaseModel):
    image_base64: str
    prompt_used: str
    error: Optional[str] = None

class PageData(BaseModel):
    id: str
    index: int
    canvasJSON: str

class PageFormat(BaseModel):
    width: float = 210
    height: float = 297
    orientation: str = "portrait"
    margins: Dict[str, float] = {"top": 15, "right": 15, "bottom": 15, "left": 15}

class WorksheetSaveRequest(BaseModel):
    id: Optional[str] = None
    title: str
    description: Optional[str] = None
    pages: List[PageData]
    pageFormat: Optional[PageFormat] = None

class WorksheetResponse(BaseModel):
    id: str
    title: str
    description: Optional[str]
    pages: List[PageData]
    pageFormat: PageFormat
    createdAt: str
    updatedAt: str

class AIModifyRequest(BaseModel):
    prompt: str = Field(..., min_length=3, max_length=1000)
    canvas_json: str
    model: str = "qwen2.5vl:32b"

class AIModifyResponse(BaseModel):
    modified_canvas_json: Optional[str] = None
    message: str
    error: Optional[str] = None

class ReconstructRequest(BaseModel):
    session_id: str
    page_number: int = 1
    include_images: bool = True
    regenerate_graphics: bool = False

class ReconstructResponse(BaseModel):
    canvas_json: str
    page_width: int
    page_height: int
    elements_count: int
    vocabulary_matched: int
    message: str
    error: Optional[str] = None

# =============================================
# IN-MEMORY STORAGE (Development)
# =============================================

worksheets_db: Dict[str, Dict] = {}

# PDF Generation availability
try:
    from reportlab.lib import colors  # noqa: F401
    from reportlab.lib.pagesizes import A4  # noqa: F401
    from reportlab.lib.units import mm  # noqa: F401
    from reportlab.pdfgen import canvas  # noqa: F401
    from reportlab.lib.styles import getSampleStyleSheet  # noqa: F401
    REPORTLAB_AVAILABLE = True
except ImportError:
    REPORTLAB_AVAILABLE = False