"""Global configuration constants and project path definitions."""

import os
from pathlib import Path

# Root directory of the project
PROJECT_ROOT = Path(__file__).resolve().parent.parent.parent

# Dataset paths
DATASET_DIR = PROJECT_ROOT / "dataset"
RAW_DATA_DIR = DATASET_DIR / "BASE"
PROCESSED_DATA_DIR = DATASET_DIR / "processed"
METADATA_DIR = DATASET_DIR / "metadata"

# Research and paper
RESEARCH_DIR = PROJECT_ROOT / "research"

# Output directories
EXPERIMENTS_DIR = PROJECT_ROOT / "experiments"
MODELS_DIR = PROJECT_ROOT / "models"
RESULTS_DIR = PROJECT_ROOT / "results"
REPORTS_DIR = PROJECT_ROOT / "reports"
AUDIT_RESULTS_DIR = RESULTS_DIR / "audit"
AUDIT_REPORTS_DIR = REPORTS_DIR / "audit"

# Audio standardization parameters
TARGET_SAMPLE_RATE = 16000
TARGET_CHANNELS = 1  # Mono
AUDIO_BIT_DEPTH = 16
MAX_DURATION_SECONDS = 10.0  # Max window length for models
MIN_DURATION_SECONDS = 1.0

# Emotion classes (strictly defined from BASE dataset)
EMOTION_CLASSES = ["Angry", "Excited", "Happy", "Neutral", "Sad"]
NUM_CLASSES = len(EMOTION_CLASSES)
EMOTION_TO_ID = {emotion: idx for idx, emotion in enumerate(EMOTION_CLASSES)}
ID_TO_EMOTION = {idx: emotion for idx, emotion in enumerate(EMOTION_CLASSES)}

# Reproducibility
RANDOM_SEED = 42

# Ensure key directories exist
for path in [PROCESSED_DATA_DIR, METADATA_DIR, EXPERIMENTS_DIR, MODELS_DIR, RESULTS_DIR, REPORTS_DIR, AUDIT_RESULTS_DIR, AUDIT_REPORTS_DIR]:
    path.mkdir(parents=True, exist_ok=True)