#!/bin/bash
set -euo pipefail

# ==================== 配置 ====================
PROJECT_NAME="FastapiAdmin"
WORK_DIR="$(cd "$(dirname "$0")" && pwd)"
DOCKER_DIR="${WORK_DIR}/docker"
ENV_FILE="${DOCKER_DIR}/.env"
GIT_REPO="https://gitee.com/fastapiadmin/${PROJECT_NAME}.git"

COLOR_GREEN='\033[0;32m'; COLOR_BLUE='\033[0;34m'; COLOR_YELLOW='\033[0;33m'; COLOR_RED='\033[0;31m'; COLOR_RESET='\033[0m'

log() {
    local color; local level=${2:-INFO}
    case $level in
        INFO) color="${COLOR_BLUE}" ;; WARN) color="${COLOR_YELLOW}" ;;
        ERROR) color="${COLOR_RED}" ;; SUCCESS) color="${COLOR_GREEN}" ;;
        *) color="${COLOR_RESET}" ;;
    esac
    echo -e "${color}[$(date '+%Y-%m-%d %H:%M:%S')] [${level}] ${1}${COLOR_RESET}"
}

# ==================== 核心函数 ====================

load_env() {
    if [ -f "${ENV_FILE}" ]; then
        set -a; source "${ENV_FILE}"; set +a
    elif [ -f "${DOCKER_DIR}/.env.example" ]; then
        cp "${DOCKER_DIR}/.env.example" "${ENV_FILE}"
        set -a; source "${ENV_FILE}"; set +a
    else
        log ".env 文件不存在" "ERROR"; exit 1
    fi
    log "✅ 环境变量已加载" "SUCCESS"
}

check_deps() {
    for dir in "${DOCKER_DIR}/mysql/data" "${DOCKER_DIR}/redis/data"; do
        [ -d "$dir" ] || mkdir -p "$dir"
    done
    local missing=()
    for cmd in git docker; do
        command -v $cmd &>/dev/null || missing+=($cmd)
    done
    if ! docker compose version &>/dev/null && ! docker-compose --version &>/dev/null; then
        missing+=("docker compose")
    fi
    if [ ${#missing[@]} -gt 0 ]; then
        log "缺少依赖: ${missing[*]}" "ERROR"; exit 1
    fi
    log "✅ 依赖检查通过" "SUCCESS"
}

pull_code() {
    cd "${WORK_DIR}"

    local script_md5=""
    if command -v md5sum &>/dev/null; then
        script_md5=$(md5sum "$0" | awk '{print $1}')
    elif command -v md5 &>/dev/null; then
        script_md5=$(md5 -q "$0")
    fi
    if [ -d ".git" ]; then
        local branch
        branch=$(git rev-parse --abbrev-ref HEAD)
        log "分支: ${branch}"
        local old_head
        old_head=$(git rev-parse HEAD 2>/dev/null || echo "")
        git fetch origin || true
        git pull || { log "git pull 失败" "ERROR"; exit 1; }
        local new_head
        new_head=$(git rev-parse HEAD 2>/dev/null || echo "")
        if [ -n "$old_head" ] && [ "$old_head" != "$new_head" ]; then
            log "📋 本次拉取提交："
            git log --oneline --no-decorate "${old_head}..${new_head}" 2>/dev/null | sed 's/^/    /' || true
        fi
        # deploy.sh 自身有更新则重载
        if [ -n "$script_md5" ]; then
            local new_md5=""
            command -v md5sum &>/dev/null && new_md5=$(md5sum "$0" | awk '{print $1}') || new_md5=$(md5 -q "$0")
            if [ "$script_md5" != "$new_md5" ]; then
                log "🔄 deploy.sh 已更新，重新执行..." "WARN"
                exec "$0" "$@"
            fi
        fi
    else
        git init && git remote add origin "${GIT_REPO}"
        git pull origin master || git pull origin main || { log "拉取代码失败" "ERROR"; exit 1; }
    fi
    log "✅ 代码已更新至 $(git log -1 --oneline)" "SUCCESS"
}

build_image() {
    cd "${DOCKER_DIR}"
    export DOCKER_BUILDKIT=1
    docker compose build || { log "镜像构建失败" "ERROR"; exit 1; }
    log "✅ 镜像构建完成" "SUCCESS"
}

start_service() {
    cd "${DOCKER_DIR}"
    docker compose up -d --force-recreate || { log "容器启动失败" "ERROR"; exit 1; }
    log "⏳ 等待服务就绪..."
    for i in $(seq 1 30); do
        if docker compose ps mysql --format '{{.Status}}' 2>/dev/null | grep -q "healthy"; then
            log "✅ MySQL 已就绪" "SUCCESS"; break
        fi
        sleep 2
    done
    docker compose ps
    log "✅ 服务启动完成" "SUCCESS"
}

stop_service() {
    cd "${DOCKER_DIR}" 2>/dev/null || true
    docker compose down 2>/dev/null || true
    log "✅ 服务已停止" "SUCCESS"
}

show_logs() {
    cd "${DOCKER_DIR}"
    docker compose ps --format "table {{.Service}}\t{{.Name}}\t{{.Status}}\t{{.Ports}}"
    echo "--- 最近 50 行日志 ---"
    docker compose logs --tail=50 2>/dev/null
}

verify() {
    local ok=true
    for svc in mysql redis backend nginx; do
        local st=$(docker compose ps "$svc" --format '{{.Status}}' 2>/dev/null || echo "not found")
        if echo "$st" | grep -qE "Up|healthy"; then
            log "✅ $svc: $st" "SUCCESS"
        else
            log "❌ $svc: $st" "ERROR"; ok=false
        fi
    done
    $ok && log "✅ 所有服务正常" "SUCCESS" || log "⚠️ 部分服务异常" "WARN"
}

cleanup() {
    docker system prune -a -f >/dev/null 2>&1 || true
    log "✅ 所有资源已清理" "SUCCESS"
}

# ==================== 主流程 ====================

full_deploy() {
    log "========== 🚀 开始完整部署 ==========" "INFO"
    log "时间: $(date '+%Y-%m-%d %H:%M:%S')"
    load_env
    check_deps
    stop_service
    pull_code "$@"
    build_image
    start_service
    verify
    show_logs
    cleanup
    log "========== 🎉 部署完成 ==========" "SUCCESS"
}

# ==================== 入口 ====================

trap 'stop_service; exit 130' INT TERM

case ${1:-} in
    start)   load_env; start_service ;;
    stop)    load_env; stop_service ;;
    restart) load_env; cd "${DOCKER_DIR}"; docker compose restart; docker compose ps ;;
    logs)    load_env; show_logs ;;
    verify)  load_env; verify ;;
    clean)   cleanup ;;
    help|-h|--help)
        echo "用法: $0 [命令]"
        echo "  无参数    完整部署（拉代码→构建→启动→清理）"
        echo "  start     启动服务"
        echo "  stop      停止服务"
        echo "  restart   重启服务"
        echo "  logs      查看日志"
        echo "  verify    验证服务"
        echo "  clean     清理构建缓存"
        ;;
    *) full_deploy "$@" ;;
esac