//go:build kanholec_gui

package gui

import (
	"fmt"
	"image/color"
	"sync"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/canvas"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/layout"
	"fyne.io/fyne/v2/widget"
)

type Dashboard struct {
	app *App

	statusDot    *canvas.Circle
	statusLabel  *widget.Label
	statusDetail *widget.Label

	proxyList   *widget.List
	proxyData   []ProxyInfo
	proxyDataMu sync.Mutex

	logView  *widget.Entry
	logLines []string
	logMu    sync.Mutex

	startBtn     *widget.Button
	stopBtn      *widget.Button
	reconnectBtn *widget.Button

	serverInfo *widget.Label
	configView *widget.Entry

	content *fyne.Container
}

type ProxyInfo struct {
	Name       string
	Type       string
	Status     string
	LocalAddr  string
	RemoteAddr string
	Error      string
}

func NewDashboard(app *App) *Dashboard {
	d := &Dashboard{
		app: app,
	}
	d.buildUI()
	return d
}

func (d *Dashboard) buildUI() {
	d.statusDot = canvas.NewCircle(colorPlaceholder)
	d.statusDot.Resize(fyne.NewSize(16, 16))

	d.statusLabel = widget.NewLabelWithStyle("Disconnected", fyne.TextAlignLeading, fyne.TextStyle{Bold: true})
	d.statusDetail = widget.NewLabel("Not connected to server")
	d.statusDetail.Importance = widget.LowImportance

	d.serverInfo = widget.NewLabel("Server: --")
	d.serverInfo.Importance = widget.LowImportance

	d.configView = widget.NewMultiLineEntry()
	d.configView.SetMinRowsVisible(10)
	d.configView.Disable()
	d.configView.SetText("No configuration loaded yet...")

	d.logView = widget.NewMultiLineEntry()
	d.logView.SetMinRowsVisible(15)
	d.logView.Disable()
	d.logView.Wrapping = fyne.TextWrapWord
	d.logView.SetText("Waiting for logs...\n")

	d.proxyData = []ProxyInfo{}
	d.proxyList = widget.NewList(
		func() int {
			d.proxyDataMu.Lock()
			defer d.proxyDataMu.Unlock()
			return len(d.proxyData)
		},
		func() fyne.CanvasObject {
			name := widget.NewLabelWithStyle("proxy-name", fyne.TextAlignLeading, fyne.TextStyle{Bold: true})
			typ := widget.NewLabel("tcp")
			typ.Importance = widget.LowImportance
			status := widget.NewLabel("unknown")
			local := widget.NewLabel("127.0.0.1:8080")
			remote := widget.NewLabel("0.0.0.0:9090")
			errLabel := widget.NewLabel("")
			errLabel.Importance = widget.DangerImportance

			return container.NewVBox(
				container.NewHBox(name, layout.NewSpacer(), status),
				widget.NewLabel(""),
				container.NewHBox(typ, widget.NewSeparator(), local, widget.NewSeparator(), remote),
				errLabel,
			)
		},
		func(id widget.ListItemID, o fyne.CanvasObject) {
			d.proxyDataMu.Lock()
			defer d.proxyDataMu.Unlock()
			if id >= len(d.proxyData) {
				return
			}
			p := d.proxyData[id]
			vbox := o.(*fyne.Container)

			row1 := vbox.Objects[0].(*fyne.Container)
			nameLabel := row1.Objects[0].(*widget.Label)
			nameLabel.SetText(p.Name)
			statusLabel := row1.Objects[2].(*widget.Label)
			statusLabel.SetText(p.Status)
			statusLabel.Importance = widget.MediumImportance

			row2 := vbox.Objects[2].(*fyne.Container)
			typLabel := row2.Objects[0].(*widget.Label)
			typLabel.SetText(p.Type)
			localLabel := row2.Objects[2].(*widget.Label)
			localLabel.SetText(p.LocalAddr)
			remoteLabel := row2.Objects[4].(*widget.Label)
			remoteLabel.SetText(p.RemoteAddr)

			errLabel := vbox.Objects[3].(*widget.Label)
			errLabel.SetText(p.Error)
		},
	)

	d.startBtn = widget.NewButtonWithIcon("Start", nil, d.onStart)
	d.startBtn.Importance = widget.HighImportance
	d.stopBtn = widget.NewButtonWithIcon("Stop", nil, d.onStop)
	d.stopBtn.Importance = widget.DangerImportance
	d.stopBtn.Disable()
	d.reconnectBtn = widget.NewButtonWithIcon("Reconnect", nil, d.onReconnect)

	statusCard := container.NewVBox(
		container.NewHBox(
			d.statusDot,
			widget.NewLabel(""),
			d.statusLabel,
			layout.NewSpacer(),
			d.serverInfo,
		),
		widget.NewLabel(""),
		d.statusDetail,
	)

	controls := container.NewHBox(
		d.startBtn,
		widget.NewLabel(""),
		d.stopBtn,
		layout.NewSpacer(),
		d.reconnectBtn,
	)

	proxiesTab := container.NewBorder(
		container.NewVBox(
			container.NewHBox(
				widget.NewLabelWithStyle("Proxies", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
				layout.NewSpacer(),
				widget.NewButton("Refresh", func() { d.refreshProxies() }),
			),
			widget.NewLabel(""),
		),
		nil, nil, nil,
		container.NewStack(
			d.proxyList,
			container.NewVBox(
				layout.NewSpacer(),
				container.NewHBox(
					layout.NewSpacer(),
					widget.NewLabel("No proxies configured yet. Start the client to connect."),
					layout.NewSpacer(),
				),
				layout.NewSpacer(),
			),
		),
	)

	logTab := container.NewBorder(
		container.NewVBox(
			container.NewHBox(
				widget.NewLabelWithStyle("Logs", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
				layout.NewSpacer(),
				widget.NewButton("Clear", func() { d.clearLogs() }),
			),
			widget.NewLabel(""),
		),
		nil, nil, nil,
		d.logView,
	)

	configTab := container.NewBorder(
		container.NewVBox(
			widget.NewLabelWithStyle("Active Configuration", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
			widget.NewLabel(""),
		),
		nil, nil, nil,
		d.configView,
	)

	tabs := container.NewAppTabs(
		container.NewTabItem("Proxies", proxiesTab),
		container.NewTabItem("Logs", logTab),
		container.NewTabItem("Config", configTab),
	)
	tabs.SelectIndex(0)

	d.content = container.NewBorder(
		container.NewVBox(
			statusCard,
			widget.NewLabel(""),
			widget.NewSeparator(),
			widget.NewLabel(""),
			controls,
			widget.NewLabel(""),
			widget.NewSeparator(),
			widget.NewLabel(""),
		),
		nil, nil, nil,
		tabs,
	)
}

func (d *Dashboard) Content() *fyne.Container {
	return d.content
}

func (d *Dashboard) SetStatus(status string, detail string) {
	d.statusLabel.SetText(status)
	d.statusDetail.SetText(detail)

	c := StatusColor(status)
	d.statusDot.FillColor = c
	d.statusDot.Refresh()
}

func (d *Dashboard) SetServerInfo(addr string, port int) {
	d.serverInfo.SetText(fmt.Sprintf("Server: %s:%d", addr, port))
}

func (d *Dashboard) SetConfig(data string) {
	d.configView.SetText(data)
}

func (d *Dashboard) AppendLog(line string) {
	d.logMu.Lock()
	d.logLines = append(d.logLines, line)
	if len(d.logLines) > 500 {
		d.logLines = d.logLines[len(d.logLines)-500:]
	}
	d.logMu.Unlock()

	text := ""
	d.logMu.Lock()
	for _, l := range d.logLines {
		text += l + "\n"
	}
	d.logMu.Unlock()
	d.logView.SetText(text)
}

func (d *Dashboard) clearLogs() {
	d.logMu.Lock()
	d.logLines = nil
	d.logMu.Unlock()
	d.logView.SetText("")
}

func (d *Dashboard) SetProxies(proxies []ProxyInfo) {
	d.proxyDataMu.Lock()
	d.proxyData = proxies
	d.proxyDataMu.Unlock()
	d.proxyList.Refresh()
	if len(proxies) > 0 {
		d.AppendLog(fmt.Sprintf("Loaded %d proxies", len(proxies)))
	}
}

func (d *Dashboard) refreshProxies() {
	if d.app != nil && d.app.clientService != nil {
		d.AppendLog("Refreshing proxy status...")
	}
}

func (d *Dashboard) onStart() {
	d.app.startClient()
}

func (d *Dashboard) onStop() {
	d.app.stopClient()
}

func (d *Dashboard) onReconnect() {
	d.app.reconnect()
}

func (d *Dashboard) SetRunning(running bool) {
	if running {
		d.startBtn.Disable()
		d.stopBtn.Enable()
		d.SetStatus("running", "Client is connected and running")
		d.statusDot.FillColor = color.NRGBA{R: 34, G: 197, B: 94, A: 255}
	} else {
		d.startBtn.Enable()
		d.stopBtn.Disable()
		d.SetStatus("stopped", "Client is not running")
		d.statusDot.FillColor = color.NRGBA{R: 239, G: 68, B: 68, A: 255}
	}
	d.statusDot.Refresh()

	if d.app != nil && d.app.tray != nil {
		d.app.tray.SetRunning(running)
	}
}