// gomuks - A terminal Matrix client written in Go.
// Copyright (C) 2018 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"os"
	"path/filepath"

	"maunium.net/go/gomatrix"
	"maunium.net/go/gomuks/config"
	"maunium.net/go/gomuks/interface"
	"maunium.net/go/gomuks/matrix"
	"maunium.net/go/gomuks/ui"
	"maunium.net/go/gomuks/ui/debug"
	"maunium.net/go/tview"
)

type gomuks struct {
	app    *tview.Application
	ui     *ui.GomuksUI
	matrix *matrix.Container
	debug  *debug.Pane
	config *config.Config
}

func NewGomuks(enableDebug bool) *gomuks {
	configDir := filepath.Join(os.Getenv("HOME"), ".config/gomuks")
	gmx := &gomuks{
		app: tview.NewApplication(),
	}

	gmx.debug = debug.NewPane()
	gmx.debug.SetChangedFunc(func() {
		gmx.ui.Render()
	})
	debug.Default = gmx.debug

	gmx.config = config.NewConfig(configDir)
	gmx.ui = ui.NewGomuksUI(gmx)
	gmx.matrix = matrix.NewMatrixContainer(gmx)

	gmx.config.Load()
	if len(gmx.config.MXID) > 0 {
		gmx.config.LoadSession(gmx.config.MXID)
	}

	gmx.matrix.InitClient()

	main := gmx.ui.InitViews()
	if enableDebug {
		main = gmx.debug.Wrap(main)
	}
	gmx.app.SetRoot(main, true)

	return gmx
}

func (gmx *gomuks) Stop() {
	gmx.debug.Print("Disconnecting from Matrix...")
	gmx.matrix.Stop()
	gmx.debug.Print("Cleaning up UI...")
	gmx.app.Stop()
	if gmx.config.Session != nil {
		gmx.debug.Print("Saving session...")
		gmx.config.Session.Save()
	}
}

func (gmx *gomuks) Recover() {
	if p := recover(); p != nil {
		if gmx.App().GetScreen() != nil {
			gmx.App().GetScreen().Fini()
		}
		panic(p)
	}
}

func (gmx *gomuks) Start() {
	if err := gmx.app.Run(); err != nil {
		panic(err)
	}
}

func (gmx *gomuks) Matrix() *gomatrix.Client {
	return gmx.matrix.Client()
}

func (gmx *gomuks) MatrixContainer() ifc.MatrixContainer {
	return gmx.matrix
}

func (gmx *gomuks) App() *tview.Application {
	return gmx.app
}

func (gmx *gomuks) Config() *config.Config {
	return gmx.config
}

func (gmx *gomuks) UI() ifc.GomuksUI {
	return gmx.ui
}

func main() {
	debug := os.Getenv("DEBUG")
	NewGomuks(len(debug) > 0).Start()
}