#!/usr/bin/env bash

set -Eeuo pipefail

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
ROOT_DIR="$(cd -- "${SCRIPT_DIR}/.." && pwd)"
PROD_COMPOSE="${ROOT_DIR}/compose.prod.yaml"
DEV_COMPOSE="${ROOT_DIR}/compose.yaml"
ENV_FILE="${ROOT_DIR}/.env"
LEGACY_WAS_RUNNING=0

log() {
    printf '[%s] %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*"
}

fail() {
    printf '[error] %s\n' "$*" >&2
    exit 1
}

env_value() {
    local key="$1"
    grep -E "^${key}=" "$ENV_FILE" | tail -n 1 | cut -d '=' -f 2- | sed -e 's/^"//' -e 's/"$//'
}

prod() {
    docker compose -f "$PROD_COMPOSE" "$@"
}

legacy() {
    docker compose -f "$DEV_COMPOSE" "$@"
}

wait_for_health() {
    local service="$1"
    local container_id
    local status

    container_id="$(prod ps -q "$service")"
    [[ -n "$container_id" ]] || fail "Контейнер ${service} не создан"

    for _ in $(seq 1 45); do
        status="$(docker inspect -f '{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}' "$container_id")"
        if [[ "$status" == healthy ]]; then
            return 0
        fi
        if [[ "$status" == exited || "$status" == dead ]]; then
            docker logs --tail 100 "$container_id" >&2 || true
            fail "Контейнер ${service} завершился со статусом ${status}"
        fi
        sleep 2
    done

    docker logs --tail 100 "$container_id" >&2 || true
    fail "Контейнер ${service} не перешёл в healthy"
}

rollback_legacy() {
    log "Production web не прошёл проверку, выполняю откат"
    prod stop web app >/dev/null 2>&1 || true
    if (( LEGACY_WAS_RUNNING )); then
        legacy start laravel.test >/dev/null 2>&1 || true
    fi
}

main() {
    command -v docker >/dev/null 2>&1 || fail "Не найден Docker"
    docker compose version >/dev/null 2>&1 || fail "Не найден Docker Compose Plugin"
    [[ -f "$ENV_FILE" ]] || fail "Не найден ${ENV_FILE}"

    cd "$ROOT_DIR"

    local app_uid app_gid app_port legacy_id
    app_uid="$(env_value WWWUSER)"
    app_gid="$(env_value WWWGROUP)"
    app_port="$(env_value APP_PORT)"
    app_uid="${app_uid:-1000}"
    app_gid="${app_gid:-1000}"
    app_port="${app_port:-8080}"

    mkdir -p storage/app/public storage/framework/cache/data storage/framework/sessions storage/framework/views storage/logs
    if [[ "$(id -u)" -eq 0 ]]; then
        chown -R "${app_uid}:${app_gid}" storage
    fi
    chmod -R ug+rwX storage

    log "Собираю production-образы"
    prod build app web

    log "Запускаю новый PHP-FPM"
    prod up -d --no-deps app
    wait_for_health app

    log "Выполняю миграции и прогреваю кэш"
    prod exec -T --user "${app_uid}:${app_gid}" app php artisan migrate --force
    prod exec -T --user "${app_uid}:${app_gid}" app php artisan optimize

    legacy_id="$(legacy ps -q laravel.test 2>/dev/null || true)"
    if [[ -n "$legacy_id" ]] && [[ "$(docker inspect -f '{{.State.Running}}' "$legacy_id")" == true ]]; then
        LEGACY_WAS_RUNNING=1
        log "Останавливаю legacy Sail-контейнер"
        legacy stop laravel.test
    fi

    log "Переключаю nginx на production web-контейнер"
    if ! prod up -d --no-deps web || ! wait_for_health web; then
        rollback_legacy
        exit 1
    fi

    if ! curl --fail --silent --max-time 15 "http://127.0.0.1:${app_port}/" >/dev/null; then
        rollback_legacy
        fail "HTTP-проверка production web завершилась ошибкой"
    fi

    log "Production-деплой завершён: app и web healthy"
    prod ps app web
}

main "$@"