#!/usr/bin/env bash
# e2e-backup-test.sh — Backup/restore E2E test (v0.6.1)
#
# Requires: docker compose running with a single instance.
# Usage:
#   docker compose up --build -d
#   ./ci/e2e-backup-test.sh
#   docker compose down -v

set -euo pipefail

BASE="http://localhost:8080"
PASS=0
FAIL=0

pass() { PASS=$((PASS + 1)); echo "  PASS: $1"; }
fail() { FAIL=$((FAIL + 1)); echo "  FAIL: $1"; }

# ── Wait for service ─────────────────────────
echo "=== Waiting for service ==="
for i in $(seq 1 30); do
    if curl -sf "$BASE/health" > /dev/null 2>&1; then
        echo "  service ready"
        break
    fi
    sleep 1
    if [ "$i" -eq 30 ]; then
        echo "FATAL: service did not become healthy"
        exit 1
    fi
done

# ── Login as admin ───────────────────────────
echo "=== Authenticating ==="
TOKEN=$(curl -sf "$BASE/api/v1/auth/login" \
    -H "Content-Type: application/json" \
    -d '{"login":"admin","password":"admin"}' | jq -r '.access_token')

if [ -z "$TOKEN" ] || [ "$TOKEN" = "null" ]; then
    echo "FATAL: login failed"
    exit 1
fi
echo "  admin token acquired"

auth() { echo "Authorization: Bearer $TOKEN"; }

# ── Seed test data ───────────────────────────
echo "=== Seeding test data ==="

# Create a test user
curl -sf "$BASE/api/v1/auth/register" \
    -H "Content-Type: application/json" \
    -d '{"username":"backup-test-user","email":"bktest@test.com","password":"testpass123"}' > /dev/null

USER_COUNT=$(curl -sf "$BASE/api/v1/admin/users" -H "$(auth)" | jq '.data | length')
echo "  users: $USER_COUNT"

# ── Test 1: List backups (empty) ─────────────
echo "=== Test 1: List backups (empty) ==="
LIST=$(curl -sf "$BASE/api/v1/admin/backups" -H "$(auth)")
COUNT=$(echo "$LIST" | jq '.data | length')
if [ "$COUNT" -eq 0 ]; then
    pass "empty backup list"
else
    fail "expected 0 backups, got $COUNT"
fi

# ── Test 2: Create server-side backup ────────
echo "=== Test 2: Create server-side backup ==="
RESULT=$(curl -sf "$BASE/api/v1/admin/backup?store=true" \
    -X POST \
    -H "$(auth)")
FILENAME=$(echo "$RESULT" | jq -r '.data.filename')
if [ -n "$FILENAME" ] && [ "$FILENAME" != "null" ]; then
    pass "created backup: $FILENAME"
else
    fail "backup creation failed: $RESULT"
fi

# ── Test 3: List backups (has one) ───────────
echo "=== Test 3: List backups (has one) ==="
LIST=$(curl -sf "$BASE/api/v1/admin/backups" -H "$(auth)")
COUNT=$(echo "$LIST" | jq '.data | length')
if [ "$COUNT" -eq 1 ]; then
    pass "one backup listed"
else
    fail "expected 1 backup, got $COUNT"
fi

# ── Test 4: Download backup ──────────────────
echo "=== Test 4: Download backup ==="
TMPFILE=$(mktemp /tmp/backup-test-XXXXXX.swb)
HTTP_CODE=$(curl -sf -o "$TMPFILE" -w "%{http_code}" \
    "$BASE/api/v1/admin/backups/$FILENAME" -H "$(auth)")
if [ "$HTTP_CODE" = "200" ] && [ -s "$TMPFILE" ]; then
    pass "download OK ($(wc -c < "$TMPFILE") bytes)"
else
    fail "download failed (HTTP $HTTP_CODE)"
fi

# ── Test 5: Streaming backup (direct download) ──
echo "=== Test 5: Streaming backup ==="
STREAM_FILE=$(mktemp /tmp/backup-stream-XXXXXX.swb)
HTTP_CODE=$(curl -sf -o "$STREAM_FILE" -w "%{http_code}" \
    -X POST "$BASE/api/v1/admin/backup" -H "$(auth)")
if [ "$HTTP_CODE" = "200" ] && [ -s "$STREAM_FILE" ]; then
    pass "streaming download OK ($(wc -c < "$STREAM_FILE") bytes)"
else
    fail "streaming download failed (HTTP $HTTP_CODE)"
fi

# ── Test 6: Delete backup ────────────────────
echo "=== Test 6: Delete backup ==="
DEL=$(curl -sf -X DELETE "$BASE/api/v1/admin/backups/$FILENAME" -H "$(auth)")
DELETED=$(echo "$DEL" | jq -r '.data.deleted')
if [ "$DELETED" = "$FILENAME" ]; then
    pass "deleted backup"
else
    fail "delete failed: $DEL"
fi

# Verify deletion
LIST=$(curl -sf "$BASE/api/v1/admin/backups" -H "$(auth)")
COUNT=$(echo "$LIST" | jq '.data | length')
if [ "$COUNT" -eq 0 ]; then
    pass "backup list empty after delete"
else
    fail "expected 0 backups after delete, got $COUNT"
fi

# ── Cleanup ──────────────────────────────────
rm -f "$TMPFILE" "$STREAM_FILE"

# ── Summary ──────────────────────────────────
echo ""
echo "=== Results: $PASS passed, $FAIL failed ==="
if [ "$FAIL" -gt 0 ]; then
    exit 1
fi