from flask import Blueprint, render_template, request, redirect, url_for, flash, jsonify
from datetime import datetime, timezone
from auth import login_required
from models import Proxy, Group, Log, db
from health import check_proxy, run_health_checks

bp = Blueprint("main", __name__)


def _log(level, action, target=None, detail=None):
    db.session.add(Log(level=level, action=action, target=target, detail=detail))
    db.session.commit()


# ── Dashboard ──────────────────────────────────────────────────
@bp.route("/")
@bp.route("/dashboard")
@login_required
def dashboard():
    total = Proxy.query.count()
    online = Proxy.query.filter_by(status="online", enabled=True).count()
    offline = Proxy.query.filter_by(status="offline").count()
    unknown = Proxy.query.filter_by(status="unknown").count()
    groups = Group.query.count()
    recent = Log.query.order_by(Log.timestamp.desc()).limit(20).all()
    proxies = Proxy.query.filter_by(enabled=True).order_by(Proxy.updated_at.desc()).limit(10).all()
    return render_template("dashboard.html", total=total, online=online, offline=offline,
                           unknown=unknown, groups=groups, recent=recent, proxies=proxies)


# ── Proxy list ─────────────────────────────────────────────────
@bp.route("/proxies")
@login_required
def proxy_list():
    g = request.args.get("group")
    query = Proxy.query.order_by(Proxy.updated_at.desc())
    if g:
        query = query.filter_by(group_id=g)
    groups = Group.query.all()
    return render_template("proxies.html", proxies=query.all(), groups=groups, active_group=g)


@bp.route("/proxies/<int:pid>", methods=["DELETE"])
@login_required
def delete_proxy(pid):
    p = Proxy.query.get_or_404(pid)
    _log("WARN", "delete", p.name, f"删除代理 {p.host}:{p.port}")
    db.session.delete(p)
    db.session.commit()
    return redirect(url_for("main.proxy_list"))


@bp.route("/proxies/toggle/<int:pid>")
@login_required
def toggle_proxy(pid):
    p = Proxy.query.get_or_404(pid)
    p.enabled = not p.enabled
    db.session.commit()
    _log("INFO", "toggle", p.name, f"{'启用' if p.enabled else '禁用'}")
    return redirect(url_for("main.proxy_list"))


# ── Add / Edit ─────────────────────────────────────────────────
@bp.route("/proxies/add", methods=["GET", "POST"])
@login_required
def add_proxy():
    if request.method == "POST":
        p = Proxy(
            name=request.form["name"],
            host=request.form["host"],
            port=int(request.form["port"]),
            username=request.form.get("username"),
            password=request.form.get("password"),
            group_id=int(request.form["group_id"]) if request.form.get("group_id") else None,
            notes=request.form.get("notes"),
        )
        db.session.add(p)
        db.session.commit()
        _log("INFO", "add", p.name, f"添加代理 {p.host}:{p.port}")
        return redirect(url_for("main.proxy_list"))
    groups = Group.query.all()
    return render_template("proxy_form.html", p=None, groups=groups, action="add")


@bp.route("/proxies/<int:pid>/edit", methods=["GET", "POST"])
@login_required
def edit_proxy(pid):
    p = Proxy.query.get_or_404(pid)
    if request.method == "POST":
        p.name = request.form["name"]
        p.host = request.form["host"]
        p.port = int(request.form["port"])
        p.username = request.form.get("username")
        p.password = request.form.get("password")
        p.group_id = int(request.form["group_id"]) if request.form.get("group_id") else None
        p.notes = request.form.get("notes")
        db.session.commit()
        _log("INFO", "update", p.name, f"更新代理 {p.host}:{p.port}")
        return redirect(url_for("main.proxy_list"))
    groups = Group.query.all()
    return render_template("proxy_form.html", p=p, groups=groups, action="edit")


# ── Group ──────────────────────────────────────────────────────
@bp.route("/groups")
@login_required
def group_list():
    groups = Group.query.all()
    return render_template("groups.html", groups=groups)


@bp.route("/groups/add", methods=["POST"])
@login_required
def add_group():
    name = request.form["name"]
    if Group.query.filter_by(name=name).first():
        return jsonify({"error": "分组已存在"}), 400
    g = Group(name=name, color=request.form.get("color", "#6366f1"),
              description=request.form.get("description"))
    db.session.add(g)
    db.session.commit()
    _log("INFO", "add", name, "添加分组")
    return jsonify({"id": g.id, "name": g.name})


@bp.route("/groups/<int:gid>", methods=["DELETE"])
@login_required
def delete_group(gid):
    g = Group.query.get_or_404(gid)
    if g.proxies:
        return jsonify({"error": "分组下仍有代理，请先移动"}), 400
    _log("WARN", "delete", g.name, "删除分组")
    db.session.delete(g)
    db.session.commit()
    return jsonify({"ok": True})


# ── Logs ───────────────────────────────────────────────────────
@bp.route("/logs")
@login_required
def logs():
    page = int(request.args.get("page", 1))
    ps = db.paginate(Log.query.order_by(Log.timestamp.desc()), page=page, per_page=50)
    return render_template("logs.html", pages=ps,
                           page_start=max(1, ps.page - 2),
                           page_end=min(ps.pages, ps.page + 2))


@bp.route("/health/check-all")
@login_required
def health_check_all():
    results = run_health_checks()
    return jsonify(results)