#!/usr/bin/env bash
# Run OCR pipeline regression tests and exit non-zero on failure.
#
# Usage:
#   ./scripts/run-regression.sh                    # default: macmini:8086
#   ./scripts/run-regression.sh http://localhost:8086
#
# Exit codes:
#   0 = all pass
#   1 = failures or errors
#   2 = connection error

set -euo pipefail

BASE_URL="${1:-http://macmini:8086}"
ENDPOINT="${BASE_URL}/api/v1/ocr-pipeline/regression/run?triggered_by=script"

echo "=== OCR Pipeline Regression Suite ==="
echo "Endpoint: ${ENDPOINT}"
echo ""

RESPONSE=$(curl -sf -X POST "${ENDPOINT}" -H "Content-Type: application/json" 2>&1) || {
    echo "ERROR: Could not reach ${ENDPOINT}"
    exit 2
}

STATUS=$(echo "${RESPONSE}" | python3 -c "import sys,json; print(json.load(sys.stdin)['status'])")
TOTAL=$(echo "${RESPONSE}" | python3 -c "import sys,json; s=json.load(sys.stdin)['summary']; print(s['total'])")
PASSED=$(echo "${RESPONSE}" | python3 -c "import sys,json; s=json.load(sys.stdin)['summary']; print(s['passed'])")
FAILED=$(echo "${RESPONSE}" | python3 -c "import sys,json; s=json.load(sys.stdin)['summary']; print(s['failed'])")
ERRORS=$(echo "${RESPONSE}" | python3 -c "import sys,json; s=json.load(sys.stdin)['summary']; print(s['errors'])")
DURATION=$(echo "${RESPONSE}" | python3 -c "import sys,json; print(json.load(sys.stdin).get('duration_ms', '?'))")

echo "Status:   ${STATUS}"
echo "Total:    ${TOTAL}"
echo "Passed:   ${PASSED}"
echo "Failed:   ${FAILED}"
echo "Errors:   ${ERRORS}"
echo "Duration: ${DURATION}ms"
echo ""

if [ "${STATUS}" = "pass" ]; then
    echo "PASS — All regression tests passed."
    exit 0
else
    echo "FAIL — Regression failures detected!"
    # Print failure details
    echo "${RESPONSE}" | python3 -c "
import sys, json
data = json.load(sys.stdin)
for r in data.get('results', []):
    if r['status'] != 'pass':
        print(f\"  {r['status'].upper()}: {r.get('name', r['session_id'])}\")
        if 'error' in r:
            print(f\"    Error: {r['error']}\")
        ds = r.get('diff_summary', {})
        if ds:
            print(f\"    Structural: {ds.get('structural_changes', 0)}, Text: {ds.get('text_changes', 0)}, Missing: {ds.get('cells_missing', 0)}, Added: {ds.get('cells_added', 0)}\")
"
    exit 1
fi