using Microsoft.Extensions.DependencyInjection;
using Quartz.Spi;
using Quartz;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace WIDESEA_Core.QuartzJob
{
    /// <summary>
    /// 任务调度 启动服务
    /// </summary>
    public static class JobSetup
    {
        public static void AddJobSetup(this IServiceCollection services, Action<IServiceCollection> configureJobs = null)
        {
            if (services == null) throw new ArgumentNullException(nameof(services));

            // 将JobFactory注入到服务中
            services.AddSingleton<IJobFactory, JobFactory>();
            // 将SchedulerCenterServer注入到服务中
            services.AddSingleton<ISchedulerCenter, SchedulerCenterServer>();

            // 任务注入
            var baseType = typeof(IJob);
            // 获取当前应用程序域的相对搜索路径
            var path = AppDomain.CurrentDomain.RelativeSearchPath ?? AppDomain.CurrentDomain.BaseDirectory;
            // 获取指定路径下的所有程序集
            var referencedAssemblies = System.IO.Directory.GetFiles(path, "WIDESEA_Tasks.dll").Select(Assembly.LoadFrom).ToArray();
            // 获取所有定义的类型
            var types = referencedAssemblies
                .SelectMany(a => a.DefinedTypes)
                .Select(type => type.AsType())
                // 筛选出继承自IJob的类型
                .Where(x => x != baseType && baseType.IsAssignableFrom(x)).ToArray();
            // 获取所有实现了IJob的类型
            var implementTypes = types.Where(x => x.IsClass).ToArray();
            // 将所有实现了IJob的类型注入到服务中
            foreach (var implementType in implementTypes)
            {
                services.AddTransient(implementType);
            }

            // 添加定时启动配置
            services.AddTransient<StartupJob>();
            services.AddSingleton(new JobSchedule(
                jobType: typeof(StartupJob),
                cronExpression: "0 0 8 ? * *")); // 每天上午8点执行
        }
    }

    /// <summary>
    /// 启动任务
    /// </summary>
    public class StartupJob : IJob
    {
        private readonly ISchedulerCenter _schedulerCenter;

        public StartupJob(ISchedulerCenter schedulerCenter)
        {
            _schedulerCenter = schedulerCenter;
        }

        public async Task Execute(IJobExecutionContext context)
        {
            // 在这里启动所有需要定时执行的任务
            await _schedulerCenter.StartScheduleAsync();
        }
    }

    /// <summary>
    /// 任务调度配置
    /// </summary>
    public class JobSchedule
    {
        public Type JobType { get; }
        public string CronExpression { get; }

        public JobSchedule(Type jobType, string cronExpression)
        {
            JobType = jobType;
            CronExpression = cronExpression;
        }
    }
}