package main

import (
	"fmt"
	"os"
	"os/exec"
	"strconv"
	"strings"

	todotxt "git.bullercodeworks.com/brian/go-todotxt"
)

func (a *AppState) opEditor(args []string) int {
	editor := os.Getenv("EDITOR")
	if editor == "" {
		fmt.Println("No EDITOR set")
		return 1
	}
	fmt.Println("Starting", editor, a.getTodoFile())
	c := exec.Command(editor, a.getTodoFile())
	c.Stdin = os.Stdin
	c.Stdout = os.Stdout
	if err := c.Run(); err != nil {
		fmt.Println(err)
		return 1
	}
	return 0
}

func (a *AppState) opI3Status(args []string) int {
	var filterString string
	state := "Idle"
	if len(args) > 0 {
		filterString = strings.Join(args, " ")
		a.TodoList = a.getFilteredList(filterString)
	}
	total := len(a.TodoList.Todos)
	var incomplete int
	for _, v := range a.TodoList.Todos {
		if !v.HasCompletedDate() {
			incomplete++
			if dateWithinNextDay(v.DueDate) {
				state = "Warning"
			}
		}
	}
	if state != "Warning" {
		warning := a.config.Get("i3status_warning")
		if warning != "" {
			t := a.getFilteredList(warning)
			for _, v := range t.Todos {
				if !v.HasCompletedDate() {
					state = "Warning"
					break
				}
			}
		}
	}
	fmt.Printf("{\"icon\":\"tasks\",\"state\":\"%s\", \"text\": \"%s: %d/%d\"}", state, filterString, (total - incomplete), total)
	return 0
}

func (a *AppState) opListTodos(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.TodoList = a.getFilteredList(filterString)
	}

	a.TodoList.Sort(todotxt.SortPriorityAsc)

	for _, v := range a.TodoList.Todos {
		fmt.Println(a.getTodoString(*v))
		lastIdx++
	}
	if showAll {
		if err := app.LoadDoneList(); err != nil {
			fmt.Println(a.s(ResStrErrLoadingDoneList))
			fmt.Println(err.Error())
			return 1
		}
		if filterString != "" {
			a.DoneList = a.getFilteredList(filterString)
		}
		for _, v := range a.DoneList.Todos {
			fmt.Println(a.getDoneTodoString(*v))
		}
	}
	return 0
}

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

func (a *AppState) opToggleTodoComplete(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.toggleTodoComplete(id); err != nil {
			fmt.Println(err.Error())
			return 1
		}
	}
	if a.WriteList() != nil {
		fmt.Println(a.s(ResStrErrSavingList))
		return 1
	}
	return 0
}

func (a *AppState) opArchiveTodos(args []string) int {
	if len(args) > 0 {
		for _, v := range args {
			var id int
			var task *todotxt.Todo
			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.TodoList.GetTodo(id); err != nil {
				fmt.Printf("Error getting task %d\n", id)
				return 1
			}
			if err = a.archiveTodo(id); err != nil {
				fmt.Printf("Error archiving task %d\n", id)
				return 1
			}
			fmt.Println(a.getDoneTodoString(*task))
		}
	} else {
		for _, v := range a.TodoList.Todos {
			if v.Completed {
				if err := a.archiveTodo(v.Id); err != nil {
					fmt.Printf("Error archiving task %d\n", v.Id)
					return 1
				}
				fmt.Println(a.getDoneTodoString(*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
}