#!/bin/bash
# Integration tests for martillo-maldito CLI in isolated network namespaces.
# These exercise the full iptables+ipset stack end-to-end.
#
# Requires: ipset, iptables, sudo, cargo (already built binary at $BIN)
# Usage:    BIN=./target/release/martillo_maldito ./tests/integration_netns.sh

set -euo pipefail

BIN="${BIN:-./target/release/martillo_maldito}"
SET="${IPSET_NAME:-banned_it_test}"
NS="martillo-it-$RANDOM"

if [[ ! -x "$BIN" ]]; then
    echo "ERROR: binary not found at $BIN"
    echo "Build it first: cargo build --release"
    exit 1
fi

if ! command -v ipset >/dev/null; then
    echo "ERROR: ipset not installed"
    exit 1
fi

if ! command -v sudo >/dev/null; then
    echo "ERROR: sudo not installed (required for netns + iptables)"
    exit 1
fi

cleanup() {
    sudo ip netns del "$NS" 2>/dev/null || true
    sudo ipset destroy "$SET" 2>/dev/null || true
}
trap cleanup EXIT

echo "==> Creating namespace $NS"
sudo ip netns add "$NS"

echo "==> Cleaning any pre-existing set"
sudo ipset destroy "$SET" 2>/dev/null || true

PASS=0
FAIL=0

assert_eq() {
    local desc="$1" expected="$2" actual="$3"
    if [[ "$expected" == "$actual" ]]; then
        echo "  PASS: $desc"
        PASS=$((PASS+1))
    else
        echo "  FAIL: $desc (expected: '$expected', got: '$actual')"
        FAIL=$((FAIL+1))
    fi
}

run_cli() {
    sudo ip netns exec "$NS" "$BIN" "$@"
}

echo ""
echo "==> Test 1: ban then unban cycle"
run_cli ban-ip -i 192.0.2.10
assert_eq "ipset contains banned IP" "0" "$(sudo ip netns exec "$NS" ipset test "$SET" 192.0.2.10 >/dev/null 2>&1; echo $?)"
run_cli unban-ip -i 192.0.2.10
assert_eq "ipset no longer contains IP" "1" "$(sudo ip netns exec "$NS" ipset test "$SET" 192.0.2.10 >/dev/null 2>&1; echo $?)"

echo ""
echo "==> Test 2: get-banned-ips returns JSON array"
sudo ip netns exec "$NS" "$BIN" ban-ip -i 192.0.2.20
sudo ip netns exec "$NS" "$BIN" ban-ip -i 192.0.2.21
output=$(sudo ip netns exec "$NS" "$BIN" get-banned-ips)
assert_eq "output is valid JSON" "true" "$(echo "$output" | jq -e '. | type == "array"' >/dev/null 2>&1 && echo true || echo false)"
count=$(echo "$output" | jq 'length')
assert_eq "contains 2 IPs" "2" "$count"

echo ""
echo "==> Test 3: unban is idempotent"
run_cli unban-ip -i 192.0.2.99
output=$(run_cli unban-ip -i 192.0.2.99)
assert_eq "second unban returns ok" "true" "$output"

echo ""
echo "==> Test 4: iptables rule installed for ipset match"
rule_check=$(sudo ip netns exec "$NS" iptables -C INPUT -m set --match-set "$SET" src -j DROP 2>&1; echo $?)
assert_eq "iptables rule exists" "0" "$rule_check"

echo ""
echo "==> Test 5: secured ports with allowed IPs"
run_cli secure-port -p 9999
assert_eq "port 9999 is secured" "true" "$(run_cli is-port-secured -p 9999)"
assert_eq "port 8888 is NOT secured" "false" "$(run_cli is-port-secured -p 8888)"
run_cli allow-ip-for-port -i 10.0.0.5 -p 9999
allowed=$(run_cli get-secured-ports-with-allowed-ips)
assert_eq "10.0.0.5 allowed for 9999" "10.0.0.5" "$(echo "$allowed" | jq -r '."9999"[]')"
run_cli unsecure-port -p 9999
run_cli remove-allow-ip-port -i 10.0.0.5 -p 9999

echo ""
echo "==> Test 6: bulk ban performance (1000 IPs)"
start=$(date +%s%N)
for i in $(seq 1 1000); do
    a=$((i / 256))
    b=$((i % 256))
    sudo ip netns exec "$NS" ipset add "$SET" "10.50.$a.$b" -exist >/dev/null
done
end=$(date +%s%N)
elapsed_ms=$(( (end - start) / 1000000 ))
assert_eq "1000 ipset adds under 5s" "true" "$([[ $elapsed_ms -lt 5000 ]] && echo true || echo false)"
echo "  (1000 adds took ${elapsed_ms}ms)"

echo ""
echo "==> Test 7: cli list matches ipset list directly"
cli_list=$(sudo ip netns exec "$NS" "$BIN" get-banned-ips | jq -r '.[]' | sort)
ipset_list=$(sudo ip netns exec "$NS" ipset list "$SET" -json | jq -r '.ipset[0].members[].ip' | sort)
# ipset -json uses different format, compare counts instead
cli_count=$(echo "$cli_list" | wc -l)
ipset_count=$(echo "$ipset_list" | wc -l)
assert_eq "cli and ipset report same count" "$ipset_count" "$cli_count"

echo ""
echo "================================================"
echo "Results: $PASS passed, $FAIL failed"
echo "================================================"

if [[ $FAIL -gt 0 ]]; then
    exit 1
fi

echo "All integration tests passed."