package tasks

import (
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/amidaware/taskmaster"
)

func CreateSchedTask(st SchedTask) (bool, error) {
	conn, err := taskmaster.Connect()
	if err != nil {
		return false, err
	}

	defer conn.Disconnect()
	var trigger taskmaster.Trigger
	var action taskmaster.ExecAction
	var tasktrigger taskmaster.TaskTrigger
	var now = time.Now()
	if st.Trigger == "manual" {
		tasktrigger = taskmaster.TaskTrigger{
			Enabled:       st.Enabled,
			StartBoundary: now,
		}
	} else {
		tasktrigger = taskmaster.TaskTrigger{
			Enabled:       st.Enabled,
			StartBoundary: time.Date(st.StartYear, st.StartMonth, st.StartDay, st.StartHour, st.StartMinute, 0, 0, now.Location()),
			RepetitionPattern: taskmaster.RepetitionPattern{
				RepetitionInterval: st.RepetitionInterval,
				RepetitionDuration: st.RepetitionDuration,
				StopAtDurationEnd:  st.StopAtDurationEnd,
			},
		}
	}

	if st.ExpireMinute != 0 {
		tasktrigger.EndBoundary = time.Date(st.ExpireYear, st.ExpireMonth, st.ExpireDay, st.ExpireHour, st.ExpireMinute, 0, 0, now.Location())
	}

	var path, workdir, args string
	def := conn.NewTaskDefinition()
	switch st.Trigger {
	case "runonce":
		trigger = taskmaster.TimeTrigger{
			TaskTrigger: tasktrigger,
			RandomDelay: st.RandomDelay,
		}

	case "daily":
		trigger = taskmaster.DailyTrigger{
			TaskTrigger: tasktrigger,
			DayInterval: st.DayInterval,
			RandomDelay: st.RandomDelay,
		}

	case "weekly":
		trigger = taskmaster.WeeklyTrigger{
			TaskTrigger:  tasktrigger,
			DaysOfWeek:   st.DaysOfWeek,
			WeekInterval: st.WeekInterval,
			RandomDelay:  st.RandomDelay,
		}

	case "monthly":
		trigger = taskmaster.MonthlyTrigger{
			TaskTrigger:         tasktrigger,
			DaysOfMonth:         st.DaysOfMonth,
			MonthsOfYear:        st.MonthsOfYear,
			RandomDelay:         st.RandomDelay,
			RunOnLastDayOfMonth: st.RunOnLastDayOfMonth,
		}

	case "monthlydow":
		trigger = taskmaster.MonthlyDOWTrigger{
			TaskTrigger:  tasktrigger,
			DaysOfWeek:   st.DaysOfWeek,
			MonthsOfYear: st.MonthsOfYear,
			WeeksOfMonth: st.WeeksOfMonth,
			RandomDelay:  st.RandomDelay,
		}

	case "manual":
		trigger = taskmaster.TimeTrigger{
			TaskTrigger: tasktrigger,
		}
	}

	def.AddTrigger(trigger)

	currentDir, _ := os.Getwd()
	switch st.Type {
	case "rmm":
		path = os.Args[0]
		workdir = currentDir
		args = fmt.Sprintf("-m taskrunner -p %d", st.PK)
	case "schedreboot":
		path = "shutdown.exe"
		workdir = filepath.Join(os.Getenv("SYSTEMROOT"), "System32")
		args = "/r /t 5 /f"
	case "custom":
		path = st.Path
		workdir = st.WorkDir
		args = st.Args
	}

	action = taskmaster.ExecAction{
		Path:       path,
		WorkingDir: workdir,
		Args:       args,
	}

	def.AddAction(action)
	def.Principal.RunLevel = taskmaster.TASK_RUNLEVEL_HIGHEST
	def.Principal.LogonType = taskmaster.TASK_LOGON_SERVICE_ACCOUNT
	def.Principal.UserID = "SYSTEM"
	def.Settings.AllowDemandStart = true
	def.Settings.AllowHardTerminate = true
	def.Settings.DontStartOnBatteries = false
	def.Settings.Enabled = st.Enabled
	def.Settings.StopIfGoingOnBatteries = false
	def.Settings.WakeToRun = true
	def.Settings.MultipleInstances = st.TaskPolicy

	if st.DeleteAfter {
		def.Settings.DeleteExpiredTaskAfter = "PT15M"
	}

	if st.RunASAPAfterMissed {
		def.Settings.StartWhenAvailable = true
	}

	_, success, err := conn.CreateTask(fmt.Sprintf("\\%s", st.Name), def, st.Overwrite)
	if err != nil {
		return false, err
	}

	return success, nil
}

func DeleteSchedTask(name string) error {
	conn, err := taskmaster.Connect()
	if err != nil {
		return err
	}

	defer conn.Disconnect()
	err = conn.DeleteTask(fmt.Sprintf("\\%s", name))
	if err != nil {
		return err
	}

	return nil
}

func ListSchedTasks() ([]string, error) {
	ret := make([]string, 0)
	conn, err := taskmaster.Connect()
	if err != nil {
		return ret, err
	}

	defer conn.Disconnect()
	tasks, err := conn.GetRegisteredTasks()
	if err != nil {
		return ret, err
	}

	for _, task := range tasks {
		ret = append(ret, task.Name)
	}

	tasks.Release()
	return ret, nil
}

// CleanupSchedTasks removes all tacticalrmm sched tasks during uninstall
func CleanupSchedTasks() {
	conn, err := taskmaster.Connect()
	if err != nil {
		return
	}
	defer conn.Disconnect()

	tasks, err := conn.GetRegisteredTasks()
	if err != nil {
		return
	}

	for _, task := range tasks {
		if strings.HasPrefix(task.Name, "TacticalRMM_") {
			conn.DeleteTask(fmt.Sprintf("\\%s", task.Name))
		}
	}

	tasks.Release()
}