package cli

import (
	"fmt"
	"strings"
	"time"

	"git.bullercodeworks.com/brian/gime/util"
	timertxt "git.bullercodeworks.com/brian/go-timertxt"
	"github.com/spf13/viper"
)

type Program struct {
	debug bool

	timerPath string
	TimerList *timertxt.TimerList
	donePath  string
	DoneList  *timertxt.TimerList
}

func (p *Program) Initialize() error {
	path := viper.GetString("directory")
	p.timerPath = fmt.Sprintf("%s%s", path, viper.GetString("timerfile"))
	p.donePath = fmt.Sprintf("%s%s", path, viper.GetString("donefile"))

	return nil
}

func (p *Program) GetTimerFilePath() string {
	return p.timerPath
}

func (p *Program) LoadTimerList() error {
	var err error
	var tl *timertxt.TimerList
	tl, err = timertxt.LoadFromFilename(p.timerPath)
	if err != nil {
		return err
	}
	tl.Sort(timertxt.SORT_UNFINISHED_START)
	p.TimerList = tl
	return nil
}

func (p *Program) WriteLists() error {
	err := p.WriteTimerList()
	if dErr := p.WriteDoneList(); dErr != nil {
		if err == nil {
			return fmt.Errorf("Error writing Done list %w", dErr)
		} else {
			return fmt.Errorf("Error writing Both lists (Timer: %s; Done: %s) (%w)", err.Error(), dErr.Error(), err)
		}
	}
	return nil
}

func (p *Program) WriteTimerList() error {
	return p.TimerList.WriteToFilename(p.timerPath)
}

func (p *Program) GetDoneFilePath() string {
	return p.donePath
}

func (p *Program) LoadDoneList() error {
	var err error
	var tl *timertxt.TimerList
	tl, err = timertxt.LoadFromFilename(p.donePath)
	if err != nil {
		return err
	}
	p.DoneList = tl
	return nil
}

func (p *Program) WriteDoneList() error {
	return p.DoneList.WriteToFilename(p.donePath)
}

func (p *Program) ArchiveTimer(timer *timertxt.Timer) error {
	if err := p.TimerList.ArchiveTimerToFile(*timer, p.donePath); err != nil {
		return err
	}
	return p.WriteTimerList()
}

func (p *Program) GetFilteredTimerList(args []string) *timertxt.TimerList {
	var includeArchive bool
	var err error
	start := time.Time{}
	end := time.Now()
	var contextFilters []string
	var projectFilters []string

	var allFilters []func(timertxt.Timer) bool

	if len(args) > 0 {
		contextFilters, args = util.GetContextsFromSlice(args)
		projectFilters, args = util.GetProjectsFromSlice(args)
	}
	if len(args) > 0 {
		if args[0] == "--a" {
			includeArchive = true
			args = args[1:]
		}
	}
	if len(args) > 0 {
		if start, err = util.ParseFuzzyTime(args[0]); err != nil {
			y, m, d := time.Now().Date()
			start = time.Date(y, m, d, 0, 0, 0, 0, time.Now().Location())
		} else {
			args = args[1:]
		}
		if len(args) > 0 {
			if end, err = util.ParseFuzzyTime(args[0]); err != nil {
				y, m, d := time.Now().Date()
				end = time.Date(y, m, d, 23, 59, 59, 0, time.Now().Location())
			} else {
				args = args[1:]
			}
		}
	}
	list := p.TimerList.GetTimersInRange(start, end)
	if includeArchive {
		if err = p.LoadDoneList(); err != nil {
			fmt.Println("Error loading done.txt entries")
			fmt.Println(err.Error())
			return nil
		}
		doneList := p.DoneList.GetTimersInRange(start, end)
		list.Combine(doneList)
	}
	if len(contextFilters) > 0 {
		allFilters = append(allFilters, func(t timertxt.Timer) bool {
			for _, v := range contextFilters {
				v = strings.TrimPrefix(v, "@")
				if !t.HasContext(v) {
					return false
				}
			}
			return true
		})
	}
	if len(projectFilters) > 0 {
		allFilters = append(allFilters, func(t timertxt.Timer) bool {
			for _, v := range projectFilters {
				v = strings.TrimPrefix(v, "+")
				if !t.HasProject(v) {
					return false
				}
			}
			return true
		})
	}
	doFilters := func(t *timertxt.Timer) bool {
		for _, v := range allFilters {
			if !v(*t) {
				return false
			}
		}
		// If we made it all the way down here, it matches
		return true
	}
	return list.Filter(doFilters)
}

func (p *Program) GetActiveOrMostRecent() (*timertxt.Timer, error) {
	work, wErr := p.TimerList.GetActiveOrMostRecent()
	if wErr == nil {
		return work, nil
	}
	return p.GetMostRecentTimer()
}
func (p *Program) GetMostRecentTimer() (*timertxt.Timer, error) {
	work, wErr := p.TimerList.GetMostRecentTimer()
	if wErr == nil && work.FinishDate.IsZero() {
		return work, nil
	}

	if err := p.LoadDoneList(); err != nil {
		return nil, err
	}
	done, dErr := p.DoneList.GetMostRecentTimer()
	if dErr != nil {
		return nil, dErr
	}
	if !done.FinishDate.IsZero() && work == nil || done.FinishDate.After(work.FinishDate) {
		return done, nil
	}
	return work, nil
}

func (p *Program) GetTimerString(timer *timertxt.Timer) string {
	return fmt.Sprintf("%d. %s", timer.Id, strings.TrimPrefix(timer.String(), "x "))
}

func (p *Program) GetDoneTimerString(timer *timertxt.Timer) string {
	return fmt.Sprintf("--. %s", timer.String())
}