package main

import (
	"bytes"
	"fmt"
	"log"
	"os"
	"syscall"
)

var Version = "0.0.0-dev"

var state editorState

type editorState struct {
	orig       syscall.Termios
	Buffer     *bytes.Buffer
	Cx         int
	Cy         int
	Rows       int
	Cols       int
	StatusLines [2]string
	DebugLine  string
	rows       []string
	rowOffset  int
	colOffset  int
	file       string
}

func (es editorState) getCurrentRowLen() int {
	return es.getRowLen(es.Cy)
}

func (es editorState) getRowLen(lineNumber int) int {
	if lineNumber >= len(es.rows) {
		return 0
	}

	row := es.rows[lineNumber]
	_, l := renderLine(row)

	return l
}

func main() {
	defer cleanup()
	enableRawMode()
	initEditor()
	if len(os.Args) > 1 {
		fileOpen(os.Args[1])
	}

	uiRefresh()
	for editorKeyPresses() {
		uiRefresh()
	}
}

func initEditor() {
	var err error
	if state.Rows, state.Cols, err = getWindowSize(); err != nil {
		log.Fatalf("COULD NOT GET WINDOW SIZE: %v", err)
	}

	state.Cx = 0
	state.Buffer = &bytes.Buffer{}
	state.rows = []string{fmt.Sprintf("Pound Ed %s", Version)}
	state.file = ""
	state.StatusLines = [2]string{}
}

func cleanup() {
	disableRawMode()
	uiClearScreen()

	return
	if r := recover(); r != nil {
		fmt.Fprintf(os.Stderr, "Unrecoverable error:\n\t%+v\n", r)
		os.Exit(-1)
	}
}