"""
Configuration Module

Centralized configuration for paths, constants, and settings.
"""

import os
from pathlib import Path
from typing import Dict, Tuple

# ==================== PATHS ====================

# Base paths
PROJECT_ROOT = Path(__file__).parent.parent  # Points to dudong-v2/

# Model paths
MODELS_DIR = PROJECT_ROOT / "model_files"
# Use the directory containing all the model files
AUDIO_MODEL_PATH = PROJECT_ROOT / "model_files" / "audio"
DEFECT_MODEL_PATH = PROJECT_ROOT / "model_files" / "best.pt"
LOCULE_MODEL_PATH = PROJECT_ROOT / "model_files" / "locule.pt"
MATURITY_MODEL_PATH = PROJECT_ROOT / "model_files" / "multispectral" / "maturity" / "final_model.pt"

# Image paths
IMAGES_DIR = PROJECT_ROOT / "assets" / "logos"

# Test data paths (optional - can be removed if not needed)
UNSEEN_DIR = PROJECT_ROOT / "unseen"
UNSEEN_AUDIO_UNRIPE = UNSEEN_DIR / "unripe"
UNSEEN_AUDIO_MIDRIPE = UNSEEN_DIR / "midripe"
UNSEEN_QUALITY = UNSEEN_DIR / "quality"

# Data storage paths
DATA_DIR = PROJECT_ROOT / "data"
DATABASE_PATH = DATA_DIR / "database.db"
ANALYSES_DIR = DATA_DIR / "analyses"

# ==================== MODEL SETTINGS ====================

# Device configuration
DEVICE_PRIORITY = ["cuda", "cpu"]  # Try CUDA first, fallback to CPU

# Model versions (for display)
MODEL_VERSIONS = {
    "ripeness": "",
    "quality": "",
    "defect": "",
    "maturity": "",
}

# Audio model settings
AUDIO_SAMPLE_RATE = 16000
AUDIO_DESIRED_SAMPLES = 16000
AUDIO_FRAME_LENGTH = 255
AUDIO_FRAME_STEP = 128

# YOLO model settings
YOLO_CONFIDENCE_THRESHOLD = 0.2
YOLO_IMAGE_SIZE = 640

# Maturity model settings
MATURITY_MASK_BAND_INDEX = 4  # Band index for masking (860nm)
MATURITY_IMG_SIZE = 256  # Target image size after preprocessing
MATURITY_IMG_PAD = 8  # Padding for cropping

# ==================== CLASS DEFINITIONS ====================

# Ripeness classes (matching the three-class model from notebook)
RIPENESS_CLASSES = ["unripe", "ripe", "overripe"]

# Defect detection classes and colors (BGR format for OpenCV)
DEFECT_CLASS_COLORS: Dict[int, Tuple[int, int, int]] = {
    0: (255, 34, 134),   # Minor defects - Pink/Magenta
    1: (0, 252, 199),    # No defects - Cyan/Turquoise
    2: (86, 0, 254),     # Reject - Purple
}

DEFECT_CLASS_NAMES = {
    0: "Minor Defects",
    1: "No Defects",
    2: "Reject",
}

# Locule segmentation colors (BGR format) - ROYGBIV
LOCULE_COLORS: list[Tuple[int, int, int]] = [
    (0, 0, 255),      # Red
    (0, 165, 255),    # Orange
    (0, 255, 255),    # Yellow
    (0, 255, 0),      # Green
    (255, 0, 0),      # Blue
    (130, 0, 75),     # Indigo
    (211, 0, 148),    # Violet
]

# ==================== UI SETTINGS ====================

# Window settings
WINDOW_TITLE = "DuDONG Grading System"
WINDOW_WIDTH = 1920
WINDOW_HEIGHT = 1080
DEVICE_ID = "MAIN-001"

# UI Colors (for PyQt styling)
UI_COLORS = {
    # Primary colors
    "primary_dark": "#2c3e50",
    "primary_light": "#34495e",
    "accent_blue": "#3498db",
    "accent_green": "#27ae60",
    
    # Status colors
    "online": "#27ae60",
    "offline": "#e74c3c",
    "updating": "#f39c12",
    
    # Background colors
    "bg_light": "#f8f9fa",
    "bg_white": "#ffffff",
    "bg_panel": "#ecf0f1",
    
    # Text colors
    "text_dark": "#2c3e50",
    "text_medium": "#7f8c8d",
    "text_light": "#bdc3c7",
    
    # Button colors
    "btn_green": "#27ae60",
    "btn_green_hover": "#229954",
    "btn_blue": "#3498db",
    "btn_blue_hover": "#2980b9",
    "btn_orange": "#f39c12",
    "btn_orange_hover": "#e67e22",
    "btn_purple": "#9b59b6",
    "btn_purple_hover": "#8e44ad",
    "btn_red": "#e74c3c",
    "btn_red_hover": "#c0392b",
    
    # Grade colors
    "grade_a": "#27ae60",
    "grade_b": "#3498db",
    "grade_c": "#e74c3c",
}

# Status indicator sizes
STATUS_INDICATOR_SIZE = 12
STATUS_INDICATOR_RADIUS = 6

# Table settings
TABLE_ROW_HEIGHT = 45
TABLE_RECENT_RESULTS_COUNT = 5
TABLE_MAX_RESULTS_MEMORY = 100

# Feed display sizes
FEED_MIN_WIDTH = 150
FEED_MIN_HEIGHT = 110

# Image display sizes
RESULT_IMAGE_WIDTH = 621
RESULT_IMAGE_HEIGHT = 441

# ==================== THREADING SETTINGS ====================

# Thread pool settings
MAX_THREAD_COUNT = None  # None = use default (CPU count)

# ==================== PERFORMANCE SETTINGS ====================

# Spectrogram figure size
SPECTROGRAM_FIG_SIZE = (8, 1.9)
SPECTROGRAM_DPI = 100

# ==================== LOGGING SETTINGS ====================

# Log level
LOG_LEVEL = "INFO"
LOG_FORMAT = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"

# ==================== FILE DIALOG FILTERS ====================

FILE_FILTERS = {
    "audio": "Audio Files (*.wav *.mp3 *.flac *.ogg *.m4a *.aac *.wma);;WAV Files (*.wav);;MP3 Files (*.mp3);;FLAC Files (*.flac);;OGG Files (*.ogg);;M4A Files (*.m4a);;AAC Files (*.aac);;WMA Files (*.wma);;All Files (*.*)",
    "image": "Image Files (*.jpg *.jpeg *.png *.JPG *.JPEG *.PNG)",
    "tiff": "TIFF Files (*.tif *.tiff *.TIF *.TIFF);;All Files (*.*)",
    "all_media": "All Files (*.*)",
}

# Default directories for file dialogs
DEFAULT_DIRS = {
    "audio": str(UNSEEN_DIR),
    "image": str(PROJECT_ROOT),
}

# ==================== HELPER FUNCTIONS ====================

def get_device() -> str:
    """
    Get the best available device for model inference.
    
    Returns:
        str: Device name ('cuda' or 'cpu')
    """
    import torch
    
    for device in DEVICE_PRIORITY:
        if device == "cuda" and torch.cuda.is_available():
            return "cuda"
    return "cpu"


def get_gpu_info() -> str:
    """
    Get GPU information for display.
    
    Returns:
        str: GPU information string
    """
    import torch
    
    if torch.cuda.is_available():
        gpu_name = torch.cuda.get_device_name(0)
        return f"GPU: {gpu_name}"
    return "GPU: Not Available (Using CPU)"


def ensure_paths_exist() -> None:
    """Create necessary directories if they don't exist."""
    # Create necessary directories
    for directory in [IMAGES_DIR, UNSEEN_DIR, DATA_DIR, ANALYSES_DIR]:
        directory.mkdir(parents=True, exist_ok=True)


def validate_model_paths() -> Dict[str, bool]:
    """
    Check if all required model files exist.
    
    Returns:
        Dict[str, bool]: Dictionary of model availability
    """
    return {
        "audio": AUDIO_MODEL_PATH.exists(),
        "defect": DEFECT_MODEL_PATH.exists(),
        "locule": LOCULE_MODEL_PATH.exists(),
        "maturity": MATURITY_MODEL_PATH.exists(),
    }


# ==================== INITIALIZATION ====================

# Ensure paths exist when module is imported
ensure_paths_exist()