package main

import (
	"fmt"
	"strconv"
	"time"

	"git.bullercodeworks.com/brian/gime"
)

// switchTimer performs a stop on any currently running timers
// and starts a new timer with the given arguments
func cmdSwitchTimer(args []string) int {
	loadActiveTimeEntries()
	tm := time.Now()
	if timeEntries.Length() > 0 {
		fmt.Println("Stopped Timers:")
	}
	for i := 0; i < timeEntries.Length(); i++ {
		tmr := timeEntries.Get(i)
		tmr.SetEnd(tm)
		if err := gdb.UpdateTimeEntry(tmr); err != nil {
			fmt.Println(err.Error())
			return 1
		}
		fmt.Println("  " + TimerToString(tmr))
	}
	fmt.Println("Started Timer:")
	return cmdStartTimer(args)
}

// cmdStartTimer takes a list of arguments and returns the return code
// to be passed along to os.Exit
func cmdStartTimer(args []string) int {
	var err error
	var tm time.Time
	tagStart := 0
	if len(args) > 0 {
		// Check if the first argument looks like a date/time
		tm, err = parseFuzzyTime(args[0])
	}

	if len(args) == 0 || err != nil {
		// Just start it now
		tm = time.Now()
	} else {
		tagStart = 1
	}
	var entry *gime.TimeEntry

	var timerArgs []string
	if tagStart < len(args) {
		timerArgs = args[tagStart:]
	}
	tc := new(gime.TagCollection)
	for i := range timerArgs {
		tc.Push(timerArgs[i])
	}
	if entry, err = gime.CreateTimeEntry(tm, time.Time{}, tc); err != nil {
		fmt.Println(err)
		return 1
	}
	if err = gdb.SaveTimeEntry(entry); err != nil {
		fmt.Println(err)
		return 1
	}
	fmt.Println("  " + TimerToString(entry))
	return 0
}

// cmdStopTimer takes parameters that describe which times to stop
func cmdStopTimer(args []string) int {
	// args[0] should either be a timer id (starting with '@') or 'all'
	var err error
	tm := time.Now()
	actTimers := gdb.LoadTimeEntryCollection(gime.TypeCurrent)
	var tmr *gime.TimeEntry
	stopAll := len(args) > 0 && args[0] == "all"

	if !stopAll {
		if actTimers.Length() != 1 && (len(args) < 1 || args[0][0] != '@') {
			fmt.Println("Couldn't determine which timer(s) to stop")
			return 1
		}
		if actTimers.Length() == 1 {
			// only one timer running
			tmr = actTimers.Get(0)
		} else {
			// We've got a timer id to delete
			timerId, err := strconv.Atoi(args[0][1:])
			if err != nil {
				fmt.Println("Error parsing timer id: " + err.Error())
				return 1
			}
			tmr, _, err = findTimerById(timerId)
			if err != nil {
				fmt.Println(err.Error())
				return 1
			}
		}
	}

	if len(args) > 1 {
		// Check if the next argument looks like a date/time
		tm, err = parseFuzzyTime(args[1])
		if err != nil {
			fmt.Println(err.Error())
			return 1
		}
	}

	stopTimer := func(tmr *gime.TimeEntry, at time.Time) int {
		tmr.SetEnd(at)
		if err = gdb.UpdateTimeEntry(tmr); err != nil {
			fmt.Println(err.Error())
			return 1
		}
		fmt.Println("Stopped:", InferTimerDetailString(tmr))
		return 0
	}
	if stopAll {
		var ret int
		for i := 0; i < actTimers.Length(); i++ {
			ret += stopTimer(actTimers.Get(i), tm)
		}
		if ret > 0 {
			return 1 // One or more stop operations failed
		}
		return 0
	}
	return stopTimer(tmr, tm)
}

// cmdDeleteTimer takes parameters that describe the timers to be deleted.
func cmdDeleteTimer(args []string) int {
	var err error
	if len(args) < 1 || args[0][0] != '@' {
		fmt.Println("Couldn't determine which timer(s) to delete")
		return 1
	}

	// We've got a timer id to delete
	timerId, err := strconv.Atoi(args[0][1:])
	if err != nil {
		fmt.Println("Error parsing timer id: " + err.Error())
		return 1
	}
	tmr, tp, err := findTimerById(timerId)
	if err != nil {
		fmt.Println(err.Error())
		return 1
	}
	if gdb.RemoveTimeEntry(tmr.GetUUID()) != nil {
		fmt.Println("Error removing entry " + gime.TypeToString(tp) + "." + tmr.GetUUID())
		return 1
	}
	fmt.Println("Deleted Time Entry: " + TimerToString(tmr))
	return 0
}