package docker

// start up urbits

import (
	"fmt"
	"goseg/config"
	"goseg/defaults"
	"path/filepath"
	"io/ioutil"

	"github.com/docker/docker/api/types/container"
)

// load existing urbits from config json
func LoadUrbits() error {
	logger.Info("Loading Urbit ships")
	// Loop through pier list
	conf := config.Conf()
	for _, pier := range conf.Piers {
		logger.Info(fmt.Sprintf("Loading pier %s", pier))
		// load json into struct
		err := config.LoadUrbitConfig(pier)
		if err != nil {
			logger.Error(fmt.Sprintf("Error loading %s config: %v", pier, err))
			continue
		}
		shipConf := config.UrbitConf(pier)
		// don't bootstrap if it's busted
		if shipConf.BootStatus != "noboot" {
			info, err := StartContainer(pier, "vere")
			if err != nil {
				logger.Error(fmt.Sprintf("Error starting %s: %v", pier, err))
				continue
			}
			config.UpdateContainerState(pier, info)
		}
	}
	return nil
}

// urbit container config builder
func urbitContainerConf(containerName string) (container.Config, error) {
	var containerConfig container.Config
	var scriptContent string
	// construct the container metadata from version server info
	containerInfo, err := GetLatestContainerInfo("vere")
	if err != nil {
		return containerConfig, err
	}
	desiredTag := containerInfo["tag"]
	desiredHash := containerInfo["hash"]
	desiredRepo := containerInfo["repo"]
	desiredImage := fmt.Sprintf("%s:%s@sha256:%s", desiredRepo, desiredTag, desiredHash)
	// reload urbit conf from disk
	err = config.LoadUrbitConfig(containerName)
	if err != nil {
		errmsg := fmt.Errorf("Error loading %s config: %v", containerName, err)
		return containerConfig, errmsg
	}
	// put in memory
	shipConf := config.UrbitConf(containerName)
	// todo: this BootStatus doesnt actually have anythin to do with pack and meld right now
	act := shipConf.BootStatus
	// get the correct startup script based on act
	switch act {
	case "boot":
		scriptContent = defaults.StartScript
	case "pack":
		scriptContent = defaults.PackScript
	case "meld":
		scriptContent = defaults.MeldScript
	case "prep":
		scriptContent = defaults.PrepScript
	default:
		return containerConfig, fmt.Errorf("Unknown action: %s", act)
	}
	// write the script
	scriptPath := filepath.Join(config.DockerDir, containerName, "_data", containerName, "start_urbit.sh")
	err = ioutil.WriteFile(scriptPath, []byte(scriptContent), 0755) // make the script executable
	if err != nil {
		return containerConfig, fmt.Errorf("Failed to write script: %v", err)
	}
	// gather boot option values
	shipName := shipConf.PierName
	loomValue := string(shipConf.LoomSize)
	dirnameValue := shipConf.PierName
	var httpPort string
	var amesPort string
	if shipConf.Network == "wireguard" {
		httpPort = string(shipConf.WgHTTPPort)
		amesPort = string(shipConf.WgAmesPort)
	} else {
		httpPort = string(shipConf.HTTPPort)
		amesPort = string(shipConf.AmesPort)
	}
	// finally construct the container config struct
	containerConfig = container.Config{
		Image:      desiredImage,
		Entrypoint: []string{scriptPath, shipName, "--loom="+loomValue, "--dirname="+dirnameValue, "--http-port="+httpPort, "--ames-port="+amesPort},
	}
	return containerConfig, nil
}