package main

import (
	"context"
	"errors"
	"fmt"
	"log"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/spf13/cobra"
)

func devCmd(cmd *cobra.Command, args []string) {
	testDomain := "lunamc.org"
	//config, err = ezconf.LoadConfiguration("/etc/certman/certman.conf")
	err := LoadConfig("/etc/certman/certman.conf")
	if err != nil {
		log.Fatalf("Error loading configuration: %v\n", err)
	}
	err = LoadDomainConfigs()
	if err != nil {
		log.Fatalf("Error loading configs: %v\n", err)
	}

	fmt.Println(testDomain)
}

func versionCmd(cmd *cobra.Command, args []string) {
	fmt.Println("CertManager (certman) - Steven Tracey\nVersion: " + version + " build-" + build)
}

func newKeyCmd(cmd *cobra.Command, args []string) {
	key, err := GenerateKey()
	if err != nil {
		log.Fatalf("%v", err)
	}
	fmt.Printf(key)
}

func newDomain(domain, domainDir string, dirOverridden bool) error {
	//TODO add config option for "overriden dir"
	fmt.Printf("Creating new domain %s\n", domain)
	err := createNewDomainConfig(domain)
	if err != nil {
		return err
	}
	createNewDomainCertsDir(domain, domainDir, dirOverridden)
	fmt.Println("Successfully created domain entry for " + domain + "\nUpdate config file as needed in /etc/certman/domains/" + domainDir + ".conf")
	return nil
}

func install(isThin bool, mode string) error {
	if !isThin {
		makeDirs()
	}
	//config, err = ezconf.NewConfiguration(configFile, strings.ReplaceAll(defaultConfig, "{mode}", mode))
	createNewConfig(mode)
	return nil
}

func runDaemonCmd() error {
	err := createOrUpdatePIDFile("/var/run/certman.pid")
	if err != nil {
		if errors.Is(err, ErrorPIDInUse) {
			return fmt.Errorf("daemon process is already running")
		}
		return fmt.Errorf("error creating pidfile: %v", err)
	}

	ctx, cancel = context.WithCancel(context.Background())

	// Check if main config exists
	if _, err := os.Stat(configFile); os.IsNotExist(err) {
		return fmt.Errorf("main config file not found, please run 'certman --install', then properly configure /etc/certman/certman.conf")
	} else if err != nil {
		return fmt.Errorf("error opening %s: %v", configFile, err)
	}
	err = LoadConfig(configFile)
	if err != nil {
		return fmt.Errorf("error loading configuration: %v", err)
	}

	// Setup SIGINT and SIGTERM listeners
	sigChannel := make(chan os.Signal, 1)
	signal.Notify(sigChannel, syscall.SIGINT, syscall.SIGTERM)
	defer signal.Stop(sigChannel)

	reloadSigChan := make(chan os.Signal, 1)
	signal.Notify(reloadSigChan, syscall.SIGHUP)
	defer signal.Stop(reloadSigChan)

	tickRate := config.GetInt("App.tick_rate")
	ticker := time.NewTicker(time.Duration(tickRate) * time.Hour)
	defer ticker.Stop()

	wg.Add(1)
	if config.GetString("App.mode") == "server" {
		fmt.Println("Starting CertManager in server mode...")
		// Server Task loop
		go func() {
			initServer()
			defer wg.Done()
			for {
				select {
				case <-ctx.Done():
					stopServer()
					return
				case <-reloadSigChan:
					reloadServer()
				case <-ticker.C:
					serverTick()
				}
			}
		}()
	} else if config.GetString("App.mode") == "client" {
		fmt.Println("Starting CertManager in client mode...")
		// Client Task loop
		go func() {
			initClient()
			defer wg.Done()
			for {
				select {
				case <-ctx.Done():
					stopClient()
					return
				case <-reloadSigChan:
					reloadClient()
				case <-ticker.C:
					clientTick()
				}
			}
		}()
	} else {
		return fmt.Errorf("invalid operating mode \"" + config.GetString("App.mode") + "\"")
	}

	// Cleanup on stop
	sig := <-sigChannel
	fmt.Printf("Program terminated with %v\n", sig.String())

	stop()
	wg.Wait()
	return nil
}

func stop() {
	cancel()
	clearPIDFile()
}

func stopDaemonCmd() error {
	proc, err := getDaemonProcess()
	if err != nil {
		return fmt.Errorf("error getting daemon process: %v", err)
	}

	err = proc.Signal(syscall.SIGTERM)
	if err != nil {
		return fmt.Errorf("error sending SIGTERM to daemon PID: %v", err)
	}
	return nil
}

func reloadDaemonCmd() error {
	proc, err := getDaemonProcess()
	if err != nil {
		return fmt.Errorf("error getting daemon process: %v", err)
	}

	err = proc.Signal(syscall.SIGHUP)
	if err != nil {
		return fmt.Errorf("error sending SIGHUP to daemon PID: %v", err)
	}
	return nil
}

func statusDaemonCmd() error {
	fmt.Println("Not implemented :/")
	return nil
}