import time
from datetime import datetime, timezone
from extensions import db


class Proxy(db.Model):
    __tablename__ = "proxies"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(128), nullable=False, index=True)
    host = db.Column(db.String(256), nullable=False)
    port = db.Column(db.Integer, nullable=False)
    username = db.Column(db.String(128), nullable=True)
    password = db.Column(db.String(256), nullable=True)
    group_id = db.Column(db.Integer, db.ForeignKey("groups.id"), nullable=True)
    enabled = db.Column(db.Boolean, default=True)
    notes = db.Column(db.Text, nullable=True)

    # 健康状态（由检测任务更新）
    status = db.Column(db.String(16), default="unknown")  # online/offline/unknown/error
    latency_ms = db.Column(db.Float, nullable=True)
    last_check = db.Column(db.DateTime, nullable=True)

    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    updated_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc),
                           onupdate=lambda: datetime.now(timezone.utc))

    group = db.relationship("Group", backref=db.backref("proxies", lazy=True))

    def __repr__(self):
        return f"<Proxy {self.name} {self.host}:{self.port}>"


class Group(db.Model):
    __tablename__ = "groups"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(128), nullable=False, unique=True)
    color = db.Column(db.String(16), default="#6366f1")
    description = db.Column(db.Text, nullable=True)
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))

    def __repr__(self):
        return f"<Group {self.name}>"


class Log(db.Model):
    __tablename__ = "logs"

    id = db.Column(db.Integer, primary_key=True)
    timestamp = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
    level = db.Column(db.String(16), default="INFO")  # INFO/WARN/ERROR
    action = db.Column(db.String(64), nullable=True)  # add/update/delete/check
    target = db.Column(db.String(128), nullable=True)  # proxy/group name
    detail = db.Column(db.Text, nullable=True)

    def __repr__(self):
        return f"<Log [{self.level}] {self.action}>"