package task

import (
    "gopkg.in/macaron.v1"
    "github.com/ouqiang/gocron/models"
    "github.com/ouqiang/gocron/modules/logger"
    "github.com/ouqiang/gocron/modules/utils"
    "github.com/ouqiang/gocron/service"
    "strconv"
    "github.com/jakecoffman/cron"
)

func Index(ctx *macaron.Context)  {
    taskModel := new(models.Task)
    tasks, err := taskModel.List()
    if err != nil {
        logger.Error(err)
    }
    ctx.Data["Title"] = "任务列表"
    ctx.Data["Tasks"] = tasks
    ctx.HTML(200, "task/index")
}

func Create(ctx *macaron.Context)  {
    hostModel := new(models.Host)
    hosts, err := hostModel.List()
    if err != nil || len(hosts) == 0 {
        logger.Error(err)
    }
    ctx.Data["Title"] = "任务管理"
    ctx.Data["Hosts"] = hosts
    ctx.Data["FirstHostName"] = hosts[0].Name
    ctx.Data["FirstHostId"] = hosts[0].Id
    ctx.HTML(200, "task/create")
}

type TaskForm struct {
    Name string `binding:"Required;"`
    Spec string `binding:"Required;MaxSize(64)"`
    Protocol models.TaskProtocol `binding:"In(1,2)"`
    Command string `binding:"Required;MaxSize(512)"`
    Timeout int `binding:"Range(0,86400)"`
    HostId int16
    Remark string
    Status models.Status `binding:"In(1,0)"`
}

// 保存任务
func Store(ctx *macaron.Context, form TaskForm) string  {
    json := utils.JsonResponse{}
    taskModel := models.Task{}
    _, err := cron.Parse(form.Spec)
    if err != nil {
        return json.CommonFailure("crontab表达式解析失败", err)
    }
    nameExists, err := taskModel.NameExist(form.Name)
    if err != nil {
        return json.CommonFailure(utils.FailureContent, err)
    }
    if nameExists {
        return json.CommonFailure("任务名称已存在")
    }

    if form.Protocol == models.TaskSSH && form.HostId <= 0 {
        return json.CommonFailure("请选择主机名")
    }

    taskModel.Name = form.Name
    taskModel.Protocol = form.Protocol
    taskModel.Command = form.Command
    taskModel.Timeout = form.Timeout
    taskModel.HostId = form.HostId
    taskModel.Remark = form.Remark
    taskModel.Status = form.Status
    taskModel.Spec = form.Spec
    insertId, err := taskModel.Create()
    if err != nil {
        return json.CommonFailure("保存失败", err)
    }

    // 任务处于激活状态,加入调度管理
    if (taskModel.Status == models.Enabled) {
        addTaskToTimer(insertId)
    }

    return json.Success("保存成功", nil)
}

// 删除任务
func Remove(ctx *macaron.Context) string {
    id, err := strconv.Atoi(ctx.Params(":id"))
    json := utils.JsonResponse{}
    if err != nil {
        return json.CommonFailure("参数错误", err)
    }
    taskModel := new(models.Task)
    _, err = taskModel.Delete(id)
    if err != nil {
        return json.CommonFailure(utils.FailureContent, err)
    }

    service.Cron.RemoveJob(strconv.Itoa(id))

    return json.Success(utils.SuccessContent, nil)
}

// 激活任务
func Enable(ctx *macaron.Context) string {
    return changeStatus(ctx, models.Enabled)
}

// 暂停任务
func Disable(ctx *macaron.Context) string {
    return changeStatus(ctx, models.Disabled)
}

// 改变任务状态
func changeStatus(ctx *macaron.Context, status models.Status) string {
    id, err := strconv.Atoi(ctx.Params(":id"))
    json := utils.JsonResponse{}
    if err != nil {
        return json.CommonFailure("参数错误", err)
    }
    taskModel := new(models.Task)
    _, err = taskModel.Update(id, models.CommonMap{
        "Status": status,
    })
    if err != nil {
        return json.CommonFailure(utils.FailureContent, err)
    }

    if status == models.Enabled {
        addTaskToTimer(id)
    } else {
        service.Cron.RemoveJob(strconv.Itoa(id))
    }

    return json.Success(utils.SuccessContent, nil)
}

// 添加任务到定时器
func addTaskToTimer(id int)  {
    taskModel := new(models.Task)
    task, err := taskModel.Detail(id)
    if err != nil {
        logger.Error(err)
        return
    }

    taskService := service.Task{}
    taskService.Add(task)
}