package main

import (
	"fmt"
	"strconv"
	"strings"

	todotxt "github.com/br0xen/go-todotxt"
)

func (a *AppState) opListTasks(args []string) int {
	var lastIdx int
	var filterString string
	showAll := len(args) > 0 && args[0] == "-1"
	if showAll {
		args = args[1:]
	}
	if len(args) > 0 {
		filterString = strings.Join(args, " ")
		a.TaskList = a.getFilteredList(filterString)
	}
	for _, v := range *a.TaskList {
		fmt.Println(a.getTaskString(v))
		lastIdx++
	}
	if showAll {
		if err := app.LoadDoneList(); err != nil {
			fmt.Println("Error loading 'Done' list")
			fmt.Println(err.Error())
			return 1
		}
		if filterString != "" {
			a.DoneList = a.getFilteredList(filterString)
		}
		for _, v := range *a.DoneList {
			fmt.Println(a.getDoneTaskString(v))
		}
	}
	return 0
}

func (a *AppState) opAddTask(args []string) int {
	taskString := strings.Join(args, " ")
	if err := a.addTask(taskString); err != nil {
		fmt.Println("Error adding task")
		fmt.Println(err.Error())
		return 1
	}
	return 0
}

func (a *AppState) opToggleTaskComplete(args []string) int {
	if len(args) == 0 {
		fmt.Println("No id given")
		return 1
	}
	if len(args) == 0 {
		fmt.Println("No id given")
		return 1
	}
	for _, v := range args {
		var id int
		var err error
		if id, err = strconv.Atoi(v); err != nil {
			fmt.Printf("Invalid id given: %s\n", v)
			return 1
		}
		if err := a.toggleTaskComplete(id); err != nil {
			fmt.Println(err.Error())
			return 1
		}
	}
	if a.WriteList() != nil {
		fmt.Println("Error saving list")
		return 1
	}
	return 0
}

func (a *AppState) opArchiveTasks(args []string) int {
	if err := app.LoadDoneList(); err != nil {
		fmt.Println("Error loading 'Done' list")
		fmt.Println(err.Error())
		return 1
	}
	if len(args) > 0 {
		for _, v := range args {
			var id int
			var task *todotxt.Task
			var err error
			if id, err = strconv.Atoi(v); err != nil {
				fmt.Printf("Invalid id given: %s\n", v)
				return 1
			}
			if task, err = a.TaskList.GetTask(id); err != nil {
				fmt.Printf("Error getting task %d\n", id)
				return 1
			}
			if err = a.archiveTask(id); err != nil {
				fmt.Printf("Error archiving task %d\n", id)
				return 1
			}
			fmt.Println(a.getDoneTaskString(*task))
		}
	} else {
		for _, v := range *a.TaskList {
			if v.Completed {
				if err := a.archiveTask(v.Id); err != nil {
					fmt.Printf("Error archiving task %d\n", v.Id)
					return 1
				}
				fmt.Println(a.getDoneTaskString(v))
			}
		}
	}
	return 0
}

func (a *AppState) opPrintUsage(args []string) int {
	for _, v := range a.ValidOperations {
		for _, vv := range v {
			fmt.Println("  " + vv)
			fmt.Println("")
		}
	}
	return 0
}