package ui

import (
	"fmt"
	"time"

	"github.com/gdamore/tcell/v2"
	"github.com/rivo/tview"
)

const maxLogLines = 1000

// logView keeps the history of everything that was reported as a popup.
type logView struct {
	root   *tview.TextView
	app    *App
	follow bool
}

func newLogView(app *App) *logView {
	v := &logView{app: app, follow: true}
	v.root = tview.NewTextView().SetDynamicColors(true).SetScrollable(true).SetMaxLines(maxLogLines)
	v.root.SetBorder(true).SetTitle(" Log ")
	v.root.SetInputCapture(func(ev *tcell.EventKey) *tcell.EventKey {
		switch ev.Key() {
		case tcell.KeyUp, tcell.KeyPgUp, tcell.KeyHome:
			v.follow = false
		case tcell.KeyEnd:
			v.follow = true
		case tcell.KeyRune:
			switch ev.Rune() {
			case 'c':
				v.root.Clear()
				return nil
			case 'k':
				v.follow = false
			case 'G':
				v.follow = true
				v.root.ScrollToEnd()
				return nil
			}
		}
		return ev
	})
	return v
}

// add appends an entry.
func (v *logView) add(l level, text string) {
	color := map[level]string{levelInfo: "white", levelSuccess: "green", levelWarn: "yellow", levelError: "red"}[l]
	fmt.Fprintf(v.root, "[gray]%s[-] [%s]%-5s[-] %s\n", time.Now().Format("15:04:05"), color, l, tview.Escape(text))
	if v.follow {
		v.root.ScrollToEnd()
	}
}

func (v *logView) onShow() {
	if v.follow {
		v.root.ScrollToEnd()
	}
}