#!/usr/bin/env bash
# Run M group ablation variants starting from a specific variant
# Usage: bash scripts/run_m_group_from.sh [START_VARIANT]
# Examples:
#   bash scripts/run_m_group_from.sh                    # Start from M1 (default)
#   bash scripts/run_m_group_from.sh M5_shuffle_pair    # Start from M5
#   bash scripts/run_m_group_from.sh M6_drop_audio_infer # Start from M6

set -euo pipefail
cd "$(dirname "$0")/.."

[ -f .env ] && set -a && . ./.env && set +a

# All M group variants in order
ALL_M_VARIANTS="M1_video_only M2_audio_only M3_intra_modal M4_noise_target M5_shuffle_pair M6_drop_audio_infer M7_drop_video_infer"

# Parse start variant (default to M1)
START_VARIANT="${1:-M1_video_only}"

# Validate start variant
if ! echo "$ALL_M_VARIANTS" | grep -qw "$START_VARIANT"; then
    echo "Error: Invalid start variant '$START_VARIANT'"
    echo "Valid variants: $ALL_M_VARIANTS"
    exit 1
fi

# Find variants to run (from START_VARIANT to the end)
VARIANTS_TO_RUN=""
start_found=false

for variant in $ALL_M_VARIANTS; do
    if [ "$variant" = "$START_VARIANT" ]; then
        start_found=true
    fi
    
    if [ "$start_found" = "true" ]; then
        # Skip if already completed
        if ! ls outputs/cta_ablation_diffusion_${variant}_* 1> /dev/null 2>&1; then
            VARIANTS_TO_RUN="$VARIANTS_TO_RUN $variant"
        else
            echo "[skip] $variant (already completed)"
        fi
    fi
done

if [ -z "$VARIANTS_TO_RUN" ]; then
    echo "============================================================"
    echo "No variants to run starting from $START_VARIANT"
    echo "All variants from $START_VARIANT onwards are already completed!"
    echo "============================================================"
    exit 0
fi

echo "============================================================"
echo "[ablation-diffusion] Running M group variants starting from: $START_VARIANT"
echo "Variants to run:"
for v in $VARIANTS_TO_RUN; do echo "  - $v"; done
echo "[ablation-diffusion] Output dirs: outputs/cta_ablation_diffusion_<V>_<TS>/"
echo "============================================================"

run_variant() {
    local variant="$1"
    echo ""
    echo "============================================================"
    echo "[ablation-diffusion] START: $variant  ($(date '+%Y-%m-%d %H:%M:%S'))"
    echo "============================================================"
    bash scripts/train_cta_ablation_diffusion.sh "$variant"
    echo "[ablation-diffusion] DONE:  $variant  ($(date '+%Y-%m-%d %H:%M:%S'))"
}

export -f run_variant

# Run sequentially
for variant in $VARIANTS_TO_RUN; do
    run_variant "$variant"
done

echo ""
echo "============================================================"
echo "[ablation-diffusion] All variants from $START_VARIANT finished!"
echo "[ablation-diffusion] Next: bash scripts/batch_test_cta_ablation_diffusion.sh"
echo "============================================================"