package ui

import (
	"strings"

	"git.bullercodeworks.com/brian/boltbrowser/models"
	"git.bullercodeworks.com/brian/wandle"
	"github.com/nsf/termbox-go"
)

type BoltTreePane struct {
	x, y      int
	width     int
	height    int
	scrollRow int
	active    bool

	buffer         []string
	currentPath    []string
	currentPathIdx int
	filter         string

	db *models.BoltDB

	message string
}

func NewBoltTreePane(x, y, w, h int) *BoltTreePane {
	return &BoltTreePane{
		x: x, y: y,
		width: w, height: h,
	}
}

func (w *BoltTreePane) Init() wandle.Cmd {
	if w.db != nil {
		w.buffer = w.db.Lines()
	}
	return nil
}
func (w *BoltTreePane) Update(msg wandle.Msg) wandle.Cmd {
	if len(w.currentPath) == 0 {
		w.currentPath = w.db.GetNextVisiblePath(nil, w.filter)
	}
	switch msg := msg.(type) {
	case termbox.Event:
		return w.handleTermboxEvent(msg)
	}
	return nil
}
func (w *BoltTreePane) handleTermboxEvent(msg termbox.Event) wandle.Cmd {
	switch msg.Type {
	case termbox.EventKey:
		w.message = "Key Pressed: " + wandle.KeyToString(msg)
		if msg.Ch == 'g' {
			// Jump to Beginning
			w.currentPath = w.db.GetNextVisiblePath(nil, w.filter)
			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'G' {
			// Jump to End
			w.currentPath = w.db.GetPrevVisiblePath(nil, w.filter)
			return func() wandle.Msg { return nil }
		} else if msg.Key == termbox.KeyCtrlF {
			w.jumpCursorDown(w.height / 2)
			return func() wandle.Msg { return nil }
		} else if msg.Key == termbox.KeyCtrlB {
			w.jumpCursorDown(w.height / 2)
			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'j' || msg.Key == termbox.KeyArrowDown {
			w.moveCursorDown()
			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'k' || msg.Key == termbox.KeyArrowUp {
			w.moveCursorUp()
			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'p' {

			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'P' {

			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'b' {

			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'B' {

			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'l' || msg.Key == termbox.KeyArrowRight || msg.Key == termbox.KeyEnter {
			b, p, _ := w.db.GetGenericFromPath(w.currentPath)
			// Select the current item
			if b != nil {
				w.db.ToggleOpenBucket(w.currentPath)
			} else if p != nil {
				// Edit the pair
			}
			return func() wandle.Msg { return nil }
		} else if msg.Ch == 'h' || msg.Key == termbox.KeyArrowLeft {
			b, _, e := w.db.GetGenericFromPath(w.currentPath)
			if e == nil && b != nil && b.IsExpanded() {
				w.db.CloseBucket(w.currentPath)
			} else {
				if len(w.currentPath) > 1 {
					parent, err := w.db.GetBucketFromPath(w.currentPath[:len(w.currentPath)-1])
					if err == nil {
						w.db.CloseBucket(parent.GetPath())
						w.currentPath = parent.GetPath()
					}
				} else {
				}
			}
			return func() wandle.Msg { return nil }
		}
	}
	return nil
}
func (w *BoltTreePane) View(style wandle.Style) {
	treeOffset := 0
	maxCursor := w.height * 2 / 3
	if w.scrollRow > maxCursor {
		treeOffset = w.scrollRow - maxCursor
	}
	if len(w.buffer) > 0 {
		for k, v := range w.buffer[treeOffset:] {
			wandle.Print(w.x, (w.y + k - 1), style, v)
		}
	}
	wd, h := termbox.Size()
	wandle.Print(wd, h-1, style, w.message)
}

func (w *BoltTreePane) IsActive() bool   { return w.active }
func (w *BoltTreePane) SetActive(b bool) { w.active = b }
func (w *BoltTreePane) Focusable() bool  { return true }
func (w *BoltTreePane) SetX(x int)       { w.x = x }
func (w *BoltTreePane) SetY(y int)       { w.y = y }
func (w *BoltTreePane) GetX() int        { return w.x }
func (w *BoltTreePane) GetY() int        { return w.y }
func (w *BoltTreePane) SetHeight(h int)  { w.height = h }
func (w *BoltTreePane) GetHeight() int   { return w.height }
func (w *BoltTreePane) SetWidth(wdt int) { w.height = wdt }
func (w *BoltTreePane) GetWidth() int    { return w.width }

func (w *BoltTreePane) SetDB(db *models.BoltDB) {
	w.db = db
	w.RefreshBuffer()
}

func (w *BoltTreePane) RefreshBuffer() {
	buckets := w.db.GetBuckets()
	for i := range buckets {
		w.buffer = append(w.buffer, buckets[i].Lines()...)
	}
}

func (w *BoltTreePane) jumpCursorDown(distance int) {
	paths, err := w.db.BuildVisiblePathSlice(w.filter)
	if err != nil {
		return
	}
	findPath := w.currentPath
	for idx, pth := range paths {
		startJump := true
		for i := range pth {
			if len(w.currentPath) > i && pth[i] != w.currentPath[i] {
				startJump = false
			}
		}
		if startJump {
			distance--
			if distance == 0 {
				w.currentPath = paths[len(paths)-1-idx]
			}
		}
	}
	isCurPath := true
	for i := range w.currentPath {
		if w.currentPath[i] != findPath[i] {
			isCurPath = false
			break
		}
	}
	if isCurPath {
		w.currentPath = w.db.GetNextVisiblePath(nil, w.filter)
	}
}
func (w *BoltTreePane) jumpCursorUp(distance int) {
	paths, err := w.db.BuildVisiblePathSlice(w.filter)
	if err != nil {
		return
	}
	findPath := w.currentPath
	for idx, pth := range paths {
		startJump := true
		for i := range pth {
			if len(w.currentPath) > i && pth[i] != w.currentPath[i] {
				startJump = false
			}
		}
		if startJump {
			distance--
			if distance == 0 {
				w.currentPath = paths[idx]
				break
			}
		}
	}
	isCurPath := true
	for i := range w.currentPath {
		if w.currentPath[i] != findPath[i] {
			isCurPath = false
			break
		}
	}
	if isCurPath {
		w.currentPath = w.db.GetNextVisiblePath(nil, w.filter)
	}
}
func (w *BoltTreePane) moveCursorUp() {
	p := w.db.GetPrevVisiblePath(w.currentPath, w.filter)
	if p != nil {
		w.currentPath = p
	}
}
func (w *BoltTreePane) moveCursorDown() {
	p := w.db.GetNextVisiblePath(w.currentPath, w.filter)
	if p != nil {
		w.currentPath = p
	}
}

func (w *BoltTreePane) comparePaths(p1, p2 []string) bool {
	return strings.Join(p1, " → ") == strings.Join(p2, " → ")
}