package app

import (
	"fmt"
	"os"
	"strings"
	"time"
)

func writeAutoloopLoginState(loginStateFile, state, email, msg string) {
	ts := time.Now().Format(time.RFC3339)
	payload := fmt.Sprintf(`{"ts":"%s","state":"%s","email":"%s","msg":"%s"}`,
		ts,
		escapeJSON(state),
		escapeJSON(email),
		escapeJSON(msg),
	)
	_ = os.WriteFile(loginStateFile, []byte(payload), 0o644)
}

func isAutoloopConnected(out string) bool {
	low := strings.ToLower(out)
	return strings.Contains(low, "vpn is connected") ||
		strings.Contains(low, "connected to") ||
		strings.Contains(low, "after connect: connected")
}

func parseAutoloopEmail(text string) string {
	return autoloopEmailRe.FindString(text)
}

func isAutoloopLoginRequired(text string) bool {
	low := strings.ToLower(text)
	return strings.Contains(low, "please log in") ||
		strings.Contains(low, "not logged in") ||
		strings.Contains(low, "login required") ||
		strings.Contains(low, "sign in")
}

func updateAutoloopLoginStateFromText(
	text string,
	writeState func(state, email, msg string),
	logLine func(msg string),
) {
	if writeState == nil {
		return
	}
	if isAutoloopLoginRequired(text) {
		writeState("no_login", "", "NOT LOGGED IN")
		if logLine != nil {
			logLine("login: NO (detected from output)")
		}
		return
	}
	if em := parseAutoloopEmail(text); em != "" {
		writeState("ok", em, "logged in")
		if logLine != nil {
			logLine("login: OK email=" + em)
		}
		return
	}
	low := strings.ToLower(text)
	if strings.Contains(low, "not logged in") ||
		strings.Contains(low, "expired") ||
		strings.Contains(low, "no active license") {
		writeState("no_login", "", "NOT LOGGED IN (license)")
		if logLine != nil {
			logLine("login: NO (license says not logged in)")
		}
		return
	}

	if strings.Contains(low, "license") &&
		(strings.Contains(low, "active") || strings.Contains(low, "valid")) {
		writeState("ok", "", "logged in (license ok)")
		if logLine != nil {
			logLine("login: OK (license ok, email not found)")
		}
		return
	}
}

func escapeJSON(s string) string {
	s = strings.ReplaceAll(s, `\`, `\\`)
	s = strings.ReplaceAll(s, `"`, `\\"`)
	s = strings.ReplaceAll(s, "\n", "\\n")
	s = strings.ReplaceAll(s, "\r", "")
	return s
}