# coding:utf-8

import datetime
from rest_framework import serializers

from utils.supervisord_utils import SupervisordUtils
from drf_spectacular.utils import extend_schema_field
from drf_spectacular.types import OpenApiTypes


class SystemDetailSerializer(serializers.Serializer):
    cpu_rate = serializers.IntegerField(help_text='cpu使用率', default=0.0)
    disk_rate = serializers.IntegerField(help_text='磁盘使用率', default=0.0)
    memory_rate = serializers.IntegerField(help_text='内存使用率', default=0.0)
    disk_used = serializers.CharField(help_text="磁盘已使用", default="20G")
    disk_total = serializers.CharField(help_text=" 磁盘总数", default="100G")
    memory_used = serializers.CharField(help_text="内存已使用", default="3G")
    memory_total = serializers.CharField(help_text="内存总数", default="8G")

    def to_representation(self, instance):
        return {
            'cpu_rate': instance['cpu_rate'],
            'disk_rate': instance['disk_rate'],
            'memory_rate': instance['memory_rate'],
            'disk_used': instance['disk_used'],
            'disk_total': instance['disk_total'],
            'memory_used': instance['memory_used'],
            'memory_total': instance['memory_total']
        }


class ProcessListSerializer(serializers.Serializer):
    pid = serializers.IntegerField(help_text='进程id', default=1)
    name = serializers.CharField(help_text="进程名称", default="nginx")
    start_time = serializers.DateTimeField(help_text="启动时间", default="2020-03-06 20:54:00")
    state_name = serializers.CharField(label="运行状态", help_text="当运行状态不等于RUNNING时候，停止按钮设置为不可点击状态", default="RUNNING")
    description = serializers.CharField(help_text="描述信息", default="Exited too quickly (process log may have details)")

    def to_representation(self, instance):
        start_date = datetime.datetime.fromtimestamp(instance['start'])
        start_time = start_date.strftime('%Y-%m-%d %H:%M:%S')
        state_name = instance['statename']
        description = instance['description']
        pid = -1
        if state_name == 'RUNNING':
            pid = instance['pid']
            now = datetime.datetime.fromtimestamp(instance['now'])
            diff_date = now - start_date
            description = '已运行 ' + str(diff_date).replace('days', '天')

        return {
            "pid": pid,
            "name": instance['name'],
            "start_time": start_time,
            "state_name": instance['statename'],
            "description": description
        }


class ProcessDetailDeleteSerializer(serializers.Serializer):
    name = serializers.CharField(required=True, help_text="进程名称", error_messages={
        'required': '参数必须存在',
        'blank': '进程名称不能为空',
    })

    def validate_name(self, value):
        if not SupervisordUtils().is_exists(value):
            raise serializers.ValidationError('{}进程不存在'.format(value))


class ProcessDetailPutSerializer(ProcessDetailDeleteSerializer):
    action = serializers.CharField(label="操作方式", required=True, help_text="stop 表示停止，restart 表示重启")

    def validate_action(self, value):
        if value not in ['stop', 'restart']:
            raise serializers.ValidationError('仅支持stop或restart')