#!/bin/bash
#
# Скрипт установки Gitea в LXC контейнере
# Запускать внутри LXC контейнера
# База данных: PostgreSQL
#

set -e

# ============================================
# НАСТРОЙКИ
# ============================================

# Версия Gitea (должна совпадать с версией из бэкапа!)
# Проверьте актуальную на https://github.com/go-gitea/gitea/releases
GITEA_VERSION="${GITEA_VERSION:-1.25.3}"

# Порт Gitea
GITEA_PORT="${GITEA_PORT:-3000}"

# SSH порт для Git
GITEA_SSH_PORT="${GITEA_SSH_PORT:-22}"

# Домен/IP сервера (обновите на свой)
GITEA_DOMAIN="${GITEA_DOMAIN:-$(hostname -I | awk '{print $1}')}"

# PostgreSQL настройки
DB_HOST="${DB_HOST:-127.0.0.1}"
DB_PORT="${DB_PORT:-5432}"
DB_USER="${DB_USER:-gitea}"
DB_NAME="${DB_NAME:-gitea}"
DB_PASSWORD="${DB_PASSWORD:-gitea}"

# ============================================
# ФУНКЦИИ
# ============================================

log() {
    echo -e "\033[1;32m[$(date '+%H:%M:%S')]\033[0m $1"
}

error() {
    echo -e "\033[1;31m[ERROR]\033[0m $1" >&2
    exit 1
}

# ============================================
# ПРОВЕРКИ
# ============================================

if [ "$EUID" -ne 0 ]; then
    error "Запустите скрипт от root: sudo $0"
fi

log "=== Установка Gitea v${GITEA_VERSION} ==="
log "Домен: $GITEA_DOMAIN"
log "Порт: $GITEA_PORT"
log "База данных: PostgreSQL ($DB_USER@$DB_NAME)"

# ============================================
# УСТАНОВКА ЗАВИСИМОСТЕЙ
# ============================================

log "Обновление системы..."
apt update && apt upgrade -y

log "Установка зависимостей..."
apt install -y git curl wget ca-certificates gnupg unzip

# ============================================
# УСТАНОВКА POSTGRESQL
# ============================================

log "Установка PostgreSQL..."
apt install -y postgresql postgresql-contrib
systemctl enable postgresql
systemctl start postgresql

# Создание пользователя и БД
log "Создание пользователя и базы данных PostgreSQL..."
sudo -u postgres psql -c "CREATE USER $DB_USER WITH PASSWORD '$DB_PASSWORD';" 2>/dev/null || \
    log "  Пользователь $DB_USER уже существует"
sudo -u postgres psql -c "CREATE DATABASE $DB_NAME OWNER $DB_USER;" 2>/dev/null || \
    log "  База данных $DB_NAME уже существует"
sudo -u postgres psql -c "ALTER USER $DB_USER WITH SUPERUSER;" 2>/dev/null || true
log "  ✓ PostgreSQL настроен: $DB_USER@$DB_NAME"

# ============================================
# СОЗДАНИЕ ПОЛЬЗОВАТЕЛЯ GIT
# ============================================

log "Создание пользователя git..."
if ! id "git" &>/dev/null; then
    adduser --system --shell /bin/bash --gecos 'Git Version Control' \
        --group --disabled-password --home /home/git git
fi

# ============================================
# СОЗДАНИЕ ДИРЕКТОРИЙ
# ============================================

log "Создание директорий..."
mkdir -p /var/lib/gitea/{custom,data,log}
mkdir -p /var/lib/gitea/data/gitea-repositories
mkdir -p /etc/gitea

chown -R git:git /var/lib/gitea
chown root:git /etc/gitea
chmod 770 /etc/gitea

# ============================================
# СКАЧИВАНИЕ GITEA
# ============================================

log "Скачивание Gitea v${GITEA_VERSION}..."
GITEA_URL="https://dl.gitea.io/gitea/${GITEA_VERSION}/gitea-${GITEA_VERSION}-linux-amd64"

wget -q --show-progress -O /usr/local/bin/gitea "$GITEA_URL"
chmod +x /usr/local/bin/gitea

# Проверка
INSTALLED_VERSION=$(/usr/local/bin/gitea --version 2>&1 | head -1)
log "Установлено: $INSTALLED_VERSION"

# ============================================
# SYSTEMD СЕРВИС
# ============================================

log "Создание systemd сервиса..."
cat > /etc/systemd/system/gitea.service << 'EOF'
[Unit]
Description=Gitea (Git with a cup of tea)
After=syslog.target
After=network.target
After=postgresql.service

[Service]
RestartSec=2s
Type=simple
User=git
Group=git
WorkingDirectory=/var/lib/gitea/
ExecStart=/usr/local/bin/gitea web --config /etc/gitea/app.ini
Restart=always
Environment=USER=git HOME=/home/git GITEA_WORK_DIR=/var/lib/gitea

[Install]
WantedBy=multi-user.target
EOF

# ============================================
# БАЗОВАЯ КОНФИГУРАЦИЯ
# ============================================

log "Создание базовой конфигурации..."

cat > /etc/gitea/app.ini << EOF
APP_NAME = Gitea: Git with a cup of tea
RUN_USER = git
RUN_MODE = prod
WORK_PATH = /var/lib/gitea

[database]
DB_TYPE  = postgres
HOST     = ${DB_HOST}:${DB_PORT}
NAME     = $DB_NAME
USER     = $DB_USER
PASSWD   = $DB_PASSWORD
SSL_MODE = disable
LOG_SQL  = false

[repository]
ROOT = /var/lib/gitea/data/gitea-repositories

[server]
DOMAIN           = $GITEA_DOMAIN
HTTP_PORT        = $GITEA_PORT
ROOT_URL         = http://$GITEA_DOMAIN:$GITEA_PORT/
DISABLE_SSH      = false
SSH_DOMAIN       = $GITEA_DOMAIN
SSH_PORT         = $GITEA_SSH_PORT
SSH_LISTEN_PORT  = $GITEA_SSH_PORT
LFS_START_SERVER = true
LFS_CONTENT_PATH = /var/lib/gitea/data/lfs
OFFLINE_MODE     = false

[mailer]
ENABLED = false

[service]
REGISTER_EMAIL_CONFIRM            = false
ENABLE_NOTIFY_MAIL                = false
DISABLE_REGISTRATION              = false
ALLOW_ONLY_EXTERNAL_REGISTRATION  = false
ENABLE_CAPTCHA                    = false
REQUIRE_SIGNIN_VIEW               = false
DEFAULT_KEEP_EMAIL_PRIVATE        = false
DEFAULT_ALLOW_CREATE_ORGANIZATION = true
DEFAULT_ENABLE_TIMETRACKING       = true
NO_REPLY_ADDRESS                  = noreply.$GITEA_DOMAIN

[openid]
ENABLE_OPENID_SIGNIN = true
ENABLE_OPENID_SIGNUP = true

[session]
PROVIDER = file

[log]
MODE      = console
LEVEL     = info
ROOT_PATH = /var/lib/gitea/log

[security]
INSTALL_LOCK = false
EOF

chown root:git /etc/gitea/app.ini
chmod 640 /etc/gitea/app.ini

# ============================================
# ЗАПУСК СЕРВИСА
# ============================================

log "Запуск Gitea..."
systemctl daemon-reload
systemctl enable gitea
systemctl start gitea

# Ждём запуска
sleep 3

# Проверяем статус
if systemctl is-active --quiet gitea; then
    log "✅ Gitea успешно запущена!"
else
    error "Gitea не запустилась. Проверьте: journalctl -u gitea -e"
fi

# ============================================
# ИТОГИ
# ============================================

echo ""
echo "=========================================="
echo "  Gitea установлена!"
echo "=========================================="
echo ""
echo "  Web UI:  http://$GITEA_DOMAIN:$GITEA_PORT"
echo "  SSH:     git@$GITEA_DOMAIN"
echo ""
echo "  Первый пользователь станет администратором."
echo ""
echo "  Конфигурация: /etc/gitea/app.ini"
echo "  Данные:       /var/lib/gitea/"
echo "  Логи:         journalctl -u gitea -f"
echo ""
echo "=========================================="

# Для миграции: установить INSTALL_LOCK = true после восстановления