package tuiutil

import (
	"context"
	"fmt"

	handlers "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/schema"
	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
	"github.com/davecgh/go-spew/spew"
	"github.com/gdamore/tcell/v2"
	"github.com/mr-tron/base58"
	"github.com/rivo/tview"
	"go.etcd.io/bbolt"
)

// 29NkY3QtH6r8Hd9RBejwtUuju1ViAQ6jZPR7pjuTnkoH
// 1QVJo3LCACFnbeqJ7uHz97PyoPrkZr4BnZ9cVYAhRPx

// 6E6b24qy32p3L3wjRSUEGNFHMxkUsaqj7udwWVKLzkU
// 1GcnNjFnPof2YbPi2RBi3Sjy3qeR2cymc9BR6i9U2Kt

type Bucket struct {
	name        []byte
	path        [][]byte
	nextHandler handlers.Handler
	result      *handlers.KV
}

type Record struct {
	key         []byte
	value       []byte
	path        [][]byte
	nextHandler handlers.Handler
	result      *handlers.KV
}

type Application struct {
	app *tview.Application
	nav *Navigation

	db *bbolt.DB
}

func NewApplication(ctx context.Context, db *bbolt.DB) (*Application, error) {
	spew.Config.DisableMethods = true

	a := &Application{
		db: db,
	}

	a.app = tview.NewApplication()
	a.nav = NewNavigation(a.app)

	a.app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
		if event.Key() == tcell.KeyEsc {
			a.app.Stop()
			return nil
		}
		return event
	})

	err := a.nav.Push(ctx, a.newIntoView)
	if err != nil {
		return nil, err
	}

	return a, nil
}

func (a *Application) Run() error {
	return a.app.Run()
}

func (a *Application) stopOnErr(err error) {
	if err != nil {
		a.app.QueueEvent(tcell.NewEventError(err))
	}
}

func (a *Application) newIntoView(ctx context.Context) (tview.Primitive, error) {
	form := tview.NewForm()

	unsetErrMsg := func() {
		if form.GetFormItemCount() >= 4 {
			form.RemoveFormItem(3)
		}
	}
	setErrMsg := func(msg string) {
		form.AddTextView("", fmt.Sprintf("[red]%s[white]", msg), 45, 1, true, false)
	}

	var cidText, oidText string

	form.
		AddInputField("CID", "", 45, nil, func(text string) { cidText = text }).
		AddInputField("OID", "", 45, nil, func(text string) { oidText = text }).
		AddButton("Search", func() {
			unsetErrMsg()

			cidVal := &cid.ID{}
			data, err := base58.Decode(cidText)
			if err != nil {
				setErrMsg("not a valid CID")
				return
			}
			err = cidVal.Decode(data)
			if err != nil {
				setErrMsg("not a valid CID")
				return
			}

			oidVal := &oid.ID{}
			data, err = base58.Decode(oidText)
			if err != nil {
				setErrMsg("not a valid OID")
				return
			}
			err = oidVal.Decode(data)
			if err != nil {
				setErrMsg("not a valid OID")
				return
			}

			err = a.nav.Push(ctx, func(ctx context.Context) (tview.Primitive, error) {
				return a.newBucketsView(ctx, cidVal, oidVal)
			})
			a.stopOnErr(err)
		}).
		AddButton("Continue w/o search", func() {
			err := a.nav.Push(ctx, func(ctx context.Context) (tview.Primitive, error) {
				return a.newBucketsView(ctx, nil, nil)
			})
			a.stopOnErr(err)
		})

	form.SetBorder(true)

	view := tview.NewFlex().
		SetDirection(tview.FlexRow).
		AddItem(tview.NewBox(), 0, 1, false).
		AddItem(
			tview.NewFlex().
				AddItem(tview.NewBox(), 0, 1, false).
				AddItem(form, 54, 0, true).
				AddItem(tview.NewBox(), 0, 1, false),
			13, 0, true,
		).
		AddItem(tview.NewBox(), 0, 1, false)

	return view, nil
}