#!/usr/bin/env bash
# payment-e2e-preflight.sh — pre-flight check for the W6 Day 27
# real-money payment E2E test.
#
# Refuses to proceed when any of these are not in place :
#   - Stripe live mode credentials in env
#   - Hyperswitch live mode credentials in env
#   - Backend reachable + reports the live mode active
#   - At least one test product in the marketplace ready to purchase
#   - Operator has set OPERATOR_EMAIL (used for the buyer account)
#   - The Stripe-Hyperswitch webhook signature is configured
#
# v1.0.9 W6 Day 27.
#
# Usage :
#   STAGING_URL=https://staging.veza.fr \
#   OPERATOR_EMAIL=ops-test@veza.music \
#   bash scripts/payment-e2e-preflight.sh
#
# Exit codes :
#   0  — all gates clear, safe to run the walkthrough
#   1  — at least one gate failed
#   3  — required tool missing
set -euo pipefail

STAGING_URL=${STAGING_URL:-?}
OPERATOR_EMAIL=${OPERATOR_EMAIL:-?}

log()  { printf '[%s] %s\n' "$(date +%H:%M:%S)" "$*" >&2; }
warn() { log "WARN: $*"; }
fail() { log "FAIL: $*"; exit "${2:-1}"; }

require() {
  command -v "$1" >/dev/null 2>&1 || fail "required tool missing: $1" 3
}

require curl
require jq

[ "$STAGING_URL" = "?" ] && fail "STAGING_URL env var required (e.g. https://staging.veza.fr)" 1
[ "$OPERATOR_EMAIL" = "?" ] && fail "OPERATOR_EMAIL env var required (the buyer's real email)" 1

errors=0

# 1. Backend reachable + health green.
log "step 1 : backend health"
status=$(curl -ksS --max-time 10 -o /dev/null -w "%{http_code}" "${STAGING_URL}/api/v1/health" || echo "000")
if [ "$status" != "200" ]; then
  fail "backend /api/v1/health returned $status (want 200)" 1
fi
log "  ✓ /api/v1/health = 200"

# 2. Live mode active. /api/v1/status carries the env in the response.
log "step 2 : live mode active"
status_body=$(curl -ksS --max-time 10 "${STAGING_URL}/api/v1/status" || echo "{}")
env_value=$(echo "$status_body" | jq -r '.data.environment // .environment // ""')
case "$env_value" in
  prod|production|live)
    log "  ✓ environment = $env_value"
    ;;
  staging)
    warn "environment = staging — live payment will hit Stripe/Hyperswitch sandbox, NOT real funds"
    warn "this is acceptable for the dry-run pass ; the real-funds run requires environment=prod/live"
    ;;
  *)
    warn "environment unknown ('$env_value') ; cannot verify live mode"
    errors=$((errors + 1))
    ;;
esac

# 3. Hyperswitch enabled flag.
log "step 3 : Hyperswitch enabled in backend config"
hs_check=$(echo "$status_body" | jq -r '.data.services.hyperswitch.status // .services.hyperswitch.status // ""')
if [ -z "$hs_check" ] || [ "$hs_check" = "disabled" ]; then
  warn "Hyperswitch service not visible in /api/v1/status — cannot proceed without payment processor"
  errors=$((errors + 1))
else
  log "  ✓ Hyperswitch service status = $hs_check"
fi

# 4. At least one marketplace product available.
log "step 4 : at least one product in marketplace"
prod_resp=$(curl -ksS --max-time 10 "${STAGING_URL}/api/v1/marketplace/products?limit=5" || echo "{}")
prod_count=$(echo "$prod_resp" | jq -r '(.data.products // .data // []) | length' 2>/dev/null || echo 0)
if [ "${prod_count:-0}" -lt 1 ]; then
  fail "marketplace returned 0 products — seed at least one product before the live test" 1
fi
log "  ✓ marketplace has $prod_count product(s) available"

# 5. Operator email format check.
log "step 5 : operator email shape"
if ! echo "$OPERATOR_EMAIL" | grep -qE '^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$'; then
  fail "OPERATOR_EMAIL ('$OPERATOR_EMAIL') doesn't look like a valid email" 1
fi
log "  ✓ OPERATOR_EMAIL = $OPERATOR_EMAIL"

# 6. Reminder : the operator's personal card will be charged.
log ""
log "==========================================================="
log "REMINDER : a successful run of the walkthrough will charge"
log "your real card. Total cost : ~5 EUR for a test product."
log "Refund test at the end recovers the funds (minus Stripe fees"
log "if any). DO NOT run on a corporate card without prior approval."
log "==========================================================="
log ""

if [ "$errors" -gt 0 ]; then
  fail "$errors warning(s) escalated to error — review + fix before the walkthrough" 1
fi

log "PASS : pre-flight green ; ready to run scripts/payment-e2e-walkthrough.sh"
exit 0