"""Web 管理面板路由。"""
from flask import Blueprint, render_template, request, redirect, url_for, flash, current_app
from auth import login_required
from database import db
from models import Instance, User
from services import stats_service, backup_service

bp = Blueprint("web", __name__)


# ── 通用模板上下文 ─────────────────────────────────────────────
@bp.app_context_processor
def inject_nav():
    from flask import session as flask_session
    return {
        "nav": {
            "instances": request.path.startswith("/instances") or
                         request.path == "/" or request.path == "/dashboard",
            "users": request.path.startswith("/users"),
            "stats": request.path.startswith("/stats"),
            "logs": request.path.startswith("/logs"),
            "system": request.path.startswith("/system"),
        },
        "logged_in": flask_session.get("logged_in", False),
    }


# ── 仪表盘 ─────────────────────────────────────────────────────
@bp.route("/")
@bp.route("/dashboard")
@login_required
def index():
    summary = stats_service.get_dashboard_summary()
    return render_template("dashboard.html", s=summary)


# ── 实例管理 ───────────────────────────────────────────────────
@bp.route("/instances")
@login_required
def instances():
    inst_list = current_app.instance_manager.get_status()
    return render_template("instances.html", instances=inst_list)


@bp.route("/instances/<int:iid>/start", methods=["POST"])
@login_required
def start_instance(iid):
    current_app.instance_manager.start_instance(iid)
    flash("实例已启动", "success")
    return redirect(url_for("web.instances"))


@bp.route("/instances/<int:iid>/stop", methods=["POST"])
@login_required
def stop_instance(iid):
    current_app.instance_manager.stop_instance(iid)
    flash("实例已停止", "warning")
    return redirect(url_for("web.instances"))


@bp.route("/instances/<int:iid>/restart", methods=["POST"])
@login_required
def restart_instance(iid):
    current_app.instance_manager.restart_instance(iid)
    flash("实例已重启", "info")
    return redirect(url_for("web.instances"))


@bp.route("/instances/add", methods=["POST"])
@login_required
def add_instance():
    name = request.form.get("name", "").strip()
    if not name:
        flash("名称不能为空", "danger")
        return redirect(url_for("web.instances"))
    if db.session.query(Instance).filter_by(name=name).first():
        flash("名称已存在", "danger")
        return redirect(url_for("web.instances"))

    inst = Instance(
        name=name,
        listen_host=request.form.get("listen_host", "0.0.0.0"),
        listen_port=int(request.form.get("listen_port", 1080)),
        timeout=int(request.form.get("timeout", 30)),
        auth_method=request.form.get("auth_method", "none"),
        bandwidth_down=float(request.form.get("bandwidth_down", 0)),
        bandwidth_up=float(request.form.get("bandwidth_up", 0)),
        max_concurrent=int(request.form.get("max_concurrent", 10)),
        notes=request.form.get("notes", ""),
    )
    db.session.add(inst)
    db.session.commit()

    if request.form.get("start") == "on":
        current_app.instance_manager.start_instance(inst.id)

    flash(f"实例 {name} 已创建", "success")
    return redirect(url_for("web.instances"))


@bp.route("/instances/<int:iid>/edit", methods=["POST"])
@login_required
def edit_instance(iid):
    inst = db.session.query(Instance).get(iid)
    if not inst:
        return "实例不存在", 404
    data = request.form
    inst.listen_host = data.get("listen_host", inst.listen_host)
    inst.listen_port = int(data.get("listen_port", inst.listen_port))
    inst.timeout = int(data.get("timeout", inst.timeout))
    inst.auth_method = data.get("auth_method", inst.auth_method)
    inst.bandwidth_down = float(data.get("bandwidth_down", inst.bandwidth_down))
    inst.bandwidth_up = float(data.get("bandwidth_up", inst.bandwidth_up))
    inst.max_concurrent = int(data.get("max_concurrent", inst.max_concurrent))
    inst.notes = data.get("notes", inst.notes)
    db.session.commit()

    if inst.running:
        current_app.instance_manager.restart_instance(iid)

    flash("配置已更新", "success")
    return redirect(url_for("web.instances"))


@bp.route("/instances/<int:iid>/delete", methods=["POST"])
@login_required
def delete_instance(iid):
    inst = db.session.query(Instance).get(iid)
    if not inst:
        return "实例不存在", 404
    current_app.instance_manager.stop_instance(iid)
    db.session.delete(inst)
    db.session.commit()
    flash("实例已删除", "warning")
    return redirect(url_for("web.instances"))


# ── 用户管理 ───────────────────────────────────────────────────
@bp.route("/users")
@login_required
def users():
    page = int(request.args.get("page", 1))
    search = request.args.get("search", "")
    data = current_app.user_service.list_users(page=page, search=search)
    return render_template("users.html", **data, search=search)


@bp.route("/users/add", methods=["POST"])
@login_required
def add_user():
    data = request.form
    result = current_app.user_service.create_user(
        username=data.get("username", "").strip(),
        password=data.get("password", ""),
        bandwidth_down=float(data.get("bandwidth_down", 0)),
        bandwidth_up=float(data.get("bandwidth_up", 0)),
        max_concurrent=int(data.get("max_concurrent", 10)),
        total_traffic_mb=float(data.get("total_traffic_mb", 0)),
        monthly_traffic_mb=float(data.get("monthly_traffic_mb", 0)),
        ip_whitelist=data.get("ip_whitelist", ""),
        ip_blacklist=data.get("ip_blacklist", ""),
        expire_at=data.get("expire_at"),
    )
    if "error" in result:
        flash(result["error"], "danger")
    else:
        flash("用户已创建", "success")
    return redirect(url_for("web.users"))


@bp.route("/users/<int:uid>/edit", methods=["POST"])
@login_required
def edit_user(uid):
    data = request.form
    kwargs = {
        "password": data.get("password", ""),
        "bandwidth_down": float(data.get("bandwidth_down", 0)),
        "bandwidth_up": float(data.get("bandwidth_up", 0)),
        "max_concurrent": int(data.get("max_concurrent", 10)),
        "total_traffic_mb": float(data.get("total_traffic_mb", 0)),
        "monthly_traffic_mb": float(data.get("monthly_traffic_mb", 0)),
        "ip_whitelist": data.get("ip_whitelist", ""),
        "ip_blacklist": data.get("ip_blacklist", ""),
        "expire_at": data.get("expire_at"),
    }
    result = current_app.user_service.update_user(uid, **kwargs)
    if "error" in result:
        flash(result["error"], "danger")
    else:
        flash("用户已更新", "success")
    return redirect(url_for("web.users"))


@bp.route("/users/<int:uid>/delete", methods=["POST"])
@login_required
def delete_user(uid):
    result = current_app.user_service.delete_user(uid)
    if "error" in result:
        flash(result["error"], "danger")
    else:
        flash("用户已删除", "warning")
    return redirect(url_for("web.users"))


@bp.route("/users/<int:uid>/toggle", methods=["POST"])
@login_required
def toggle_user(uid):
    enabled = "enabled" in request.form
    result = current_app.user_service.toggle_user(uid, enabled)
    flash("已" + ("启用" if enabled else "禁用") + "该用户", "success")
    return redirect(url_for("web.users"))


@bp.route("/users/<int:uid>/ban", methods=["POST"])
@login_required
def ban_user(uid):
    banned = "ban" in request.form
    result = current_app.user_service.ban_user(uid, banned)
    flash("已" + ("封禁" if banned else "解封") + "该用户", "success")
    return redirect(url_for("web.users"))


# ── 统计 ───────────────────────────────────────────────────────
@bp.route("/stats")
@login_required
def stats():
    return render_template("stats.html",
                           trend=stats_service.get_traffic_trend(30),
                           users=stats_service.get_user_stats(),
                           instances=stats_service.get_instance_stats())


# ── 活跃连接 ───────────────────────────────────────────────────
@bp.route("/stats/connections")
@login_required
def connections():
    return render_template("connections.html",
                           conns=stats_service.get_active_connections())


# ── 审计日志 ───────────────────────────────────────────────────
@bp.route("/logs")
@login_required
def logs():
    page = int(request.args.get("page", 1))
    data = current_app.user_service.query_logs(
        page=page,
        event=request.args.get("event", ""),
        user=request.args.get("user", ""),
        src_ip=request.args.get("src_ip", ""),
    )
    return render_template("logs.html", **data,
                           event_filter=request.args.get("event", ""),
                           user_filter=request.args.get("user", ""),
                           ip_filter=request.args.get("src_ip", ""))


# ── 系统管理 ───────────────────────────────────────────────────
@bp.route("/system")
@login_required
def system():
    import platform, time
    backups = backup_service.list_backups()
    return render_template("system.html", backups=backups,
                           sys_version=platform.python_version(),
                           sys_platform=platform.platform(),
                           sys_hostname=platform.node(),
                           uptime=time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime()))


@bp.route("/system/backup", methods=["POST"])
@login_required
def create_backup():
    backup_service.create_backup()
    flash("备份已完成", "success")
    return redirect(url_for("web.system"))


@bp.route("/system/restore/<int:bid>", methods=["POST"])
@login_required
def restore_backup(bid):
    result = backup_service.restore_backup(bid)
    if "error" in result:
        flash(result["error"], "danger")
    else:
        flash("恢复完成，请刷新页面", "success")
    return redirect(url_for("web.system"))