#!/usr/bin/env bash
# price-monitor.sh - Pris-overvagning for produkter (homeshop.dk + pricerunner.dk)
# Brug: bash price-monitor.sh <produkt-id>
# Eksempel: bash price-monitor.sh dewalt-dcd996nt

set -euo pipefail

PRODUCT_ID="${1:-dewalt-dcd996nt}"
DB_FILE="/home/alex/clawd/data/prices/${PRODUCT_ID}.json"

if [[ ! -f "$DB_FILE" ]]; then
  echo "FEJL: Database ikke fundet: $DB_FILE" >&2
  exit 1
fi

# Les konfiguration fra database
URL=$(python3 -c "import json,sys; d=json.load(open('$DB_FILE')); print(d['url'])")
BASELINE=$(python3 -c "import json,sys; d=json.load(open('$DB_FILE')); print(d['baseline_price'])")
THRESHOLD=$(python3 -c "import json,sys; d=json.load(open('$DB_FILE')); print(d['alert_threshold_pct'])")
BUY_UNDER=$(python3 -c "import json,sys; d=json.load(open('$DB_FILE')); print(d['buy_under_dkk'])")
PRODUCT=$(python3 -c "import json,sys; d=json.load(open('$DB_FILE')); print(d['product'])")
PR_SEARCH=$(python3 -c "import json,sys; d=json.load(open('$DB_FILE')); print(d.get('pricerunner_search', ''))")

echo "=== Pris-check: $PRODUCT ==="
echo "Baseline: ${BASELINE} DKK | Threshold: ${THRESHOLD}% | Kobsgraense: ${BUY_UNDER} DKK"
echo ""

# -------------------------------------------------------
# Funktion: Scrape homeshop.dk
# -------------------------------------------------------
scrape_homeshop() {
  python3 /home/alex/clawd/tools/scrape-price.py "$URL" 2>/dev/null
}

# -------------------------------------------------------
# Funktion: Scrape pricerunner.dk sogeside
# -------------------------------------------------------
scrape_pricerunner() {
  local search_url="$1"
  if [[ -z "$search_url" ]]; then
    echo "N/A"
    return
  fi
  python3 /home/alex/clawd/tools/scrape-price.py "$search_url" 2>/dev/null
}

# -------------------------------------------------------
# Hent priser fra begge kilder
# -------------------------------------------------------
echo "Henter pris fra homeshop.dk..."
HOMESHOP_PRICE=$(scrape_homeshop)

echo "Henter pris fra pricerunner.dk..."
PR_PRICE=$(scrape_pricerunner "$PR_SEARCH")

# -------------------------------------------------------
# Find laveste pris
# -------------------------------------------------------
BEST_SOURCE="homeshop.dk"
BEST_PRICE_RAW="$HOMESHOP_PRICE"

if [[ "$HOMESHOP_PRICE" == "ERROR" || -z "$HOMESHOP_PRICE" ]]; then
  echo "ADVARSEL: Kunne ikke hente pris fra homeshop.dk" >&2
  HOMESHOP_PRICE="N/A"
fi

CURRENT_INT=""
if [[ "$HOMESHOP_PRICE" != "N/A" && "$HOMESHOP_PRICE" != "ERROR" ]]; then
  CURRENT_INT=$(python3 -c "print(int(float('$HOMESHOP_PRICE')))" 2>/dev/null || echo "")
fi

# Sammenlign med PriceRunner hvis tilgaengelig
PR_INT=""
if [[ "$PR_PRICE" != "N/A" && -n "$PR_PRICE" ]]; then
  PR_INT=$(python3 -c "print(int(float('$PR_PRICE')))" 2>/dev/null || echo "")
fi

# Vaelg laveste pris som "best"
if [[ -n "$PR_INT" && -n "$CURRENT_INT" ]]; then
  BEST=$(python3 -c "
hs = $CURRENT_INT
pr = $PR_INT
if pr < hs:
    print(f'pr:{pr}')
else:
    print(f'hs:{hs}')
")
  if [[ "$BEST" == pr:* ]]; then
    BEST_SOURCE="pricerunner.dk"
    BEST_PRICE_RAW="$PR_INT"
    CURRENT_INT="$PR_INT"
  fi
elif [[ -n "$PR_INT" && -z "$CURRENT_INT" ]]; then
  BEST_SOURCE="pricerunner.dk"
  CURRENT_INT="$PR_INT"
fi

echo ""
echo "--- Priser ---"
[[ "$HOMESHOP_PRICE" != "N/A" && "$HOMESHOP_PRICE" != "ERROR" ]] && \
  echo "  homeshop.dk:    ${HOMESHOP_PRICE%.*} DKK"
[[ -n "$PR_INT" ]] && echo "  pricerunner.dk: ${PR_INT} DKK (laveste fundet)"
[[ -z "$PR_INT" ]] && echo "  pricerunner.dk: ikke tilgaengelig"
echo ""

if [[ -z "$CURRENT_INT" ]]; then
  echo "FEJL: Ingen priser kunne hentes fra nogen kilde" >&2
  exit 1
fi

echo "Bedste pris: ${CURRENT_INT} DKK (fra ${BEST_SOURCE})"

# Beregn aendring fra baseline
PRICE_CHANGE=$(python3 -c "
baseline = float($BASELINE)
current = float($CURRENT_INT)
pct = ((baseline - current) / baseline) * 100
print(f'{pct:.1f}')
")
echo "Aendring fra baseline (${BASELINE} DKK): ${PRICE_CHANGE}%"

TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")

# -------------------------------------------------------
# Gem priser i database
# -------------------------------------------------------
python3 -c "
import json

db_file = '$DB_FILE'
with open(db_file, 'r') as f:
    data = json.load(f)

entries = []
if '$HOMESHOP_PRICE' not in ('N/A', 'ERROR', ''):
    entries.append({
        'price': int(float('$HOMESHOP_PRICE')),
        'currency': 'DKK',
        'timestamp': '$TIMESTAMP',
        'source': 'homeshop.dk'
    })
if '$PR_INT' not in ('', 'N/A'):
    entries.append({
        'price': int('$PR_INT'),
        'currency': 'DKK',
        'timestamp': '$TIMESTAMP',
        'source': 'pricerunner.dk'
    })

data['prices'].extend(entries)

# Hold kun de 90 seneste priser
if len(data['prices']) > 90:
    data['prices'] = data['prices'][-90:]

data['last_best_price'] = $CURRENT_INT
data['last_best_source'] = '$BEST_SOURCE'
data['last_checked'] = '$TIMESTAMP'

with open(db_file, 'w') as f:
    json.dump(data, f, indent=2, ensure_ascii=False)

print(f'Priser gemt ({len(entries)} poster).')
"

# -------------------------------------------------------
# Alert-logik: baseret pa bedste pris
# -------------------------------------------------------
BELOW_BUY_UNDER=$(python3 -c "print('yes' if $CURRENT_INT <= $BUY_UNDER else 'no')")
TRIGGER_ALERT=$(python3 -c "
baseline = float($BASELINE)
current = float($CURRENT_INT)
threshold = float($THRESHOLD)
pct_drop = ((baseline - current) / baseline) * 100
print('yes' if pct_drop >= threshold else 'no')
")

echo ""
if [[ "$TRIGGER_ALERT" == "yes" ]]; then
  PCT_DROP=$(python3 -c "
baseline = float($BASELINE)
current = float($CURRENT_INT)
pct = ((baseline - current) / baseline) * 100
print(f'{pct:.0f}')
")
  echo "ALERT: Pris faldet >=${THRESHOLD}% fra baseline!"
  PR_LINE=""
  [[ -n "$PR_INT" ]] && PR_LINE="
PriceRunner: ${PR_INT} DKK"
  ALERT_MSG="Prisfald! ${PRODUCT}: ${CURRENT_INT} DKK (var ${BASELINE} DKK, -${PCT_DROP}%) [${BEST_SOURCE}]${PR_LINE}
${URL}"
  echo "Sender Discord alert..."
  openclaw message send --channel discord --target "1466863360099356763" \
    -m "$ALERT_MSG" 2>/dev/null || echo "ADVARSEL: Discord alert fejlede"
elif [[ "$BELOW_BUY_UNDER" == "yes" && "$CURRENT_INT" -lt "$BASELINE" ]]; then
  echo "INFO: Pris under kobsgraense (${CURRENT_INT} <= ${BUY_UNDER} DKK)"
  PR_LINE=""
  [[ -n "$PR_INT" ]] && PR_LINE="
PriceRunner: ${PR_INT} DKK"
  ALERT_MSG="KOB NU! ${PRODUCT}: ${CURRENT_INT} DKK (under kobsgraensen ${BUY_UNDER} DKK!) [${BEST_SOURCE}]${PR_LINE}
${URL}"
  echo "Sender Discord alert (kobsgraense)..."
  openclaw message send --channel discord --target "1466863360099356763" \
    -m "$ALERT_MSG" 2>/dev/null || echo "ADVARSEL: Discord alert fejlede"
else
  echo "OK: Ingen alert - bedste pris stabil (${CURRENT_INT} DKK, aendring: ${PRICE_CHANGE}%)"
fi

echo ""
echo "Pris-check fuldfert: $(date)"