package cli

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"os"
	"sort"
	"time"

	"coopcloud.tech/abra/config"

	"github.com/sirupsen/logrus"
	"github.com/urfave/cli/v2"
)

type Image struct {
	Image  string `json:"image"`
	Rating string `json:"rating"`
	Source string `json:"source"`
	URL    string `json:"url"`
}

type Feature struct {
	Backups     string `json:"backups"`
	Email       string `json:"email"`
	Healthcheck string `json:"healthcheck"`
	Image       Image  `json:"image"`
	Status      int    `json:"status"`
	Tests       string `json:"tests"`
}

type Version struct {
	Digest string `json:"digest"`
	Image  string `json:"image"`
	Tag    string `json:"tag"`
}

type App struct {
	Category      string                        `json:"category"`
	DefaultBranch string                        `json:"default_branch"`
	Description   string                        `json:"description"`
	Features      Feature                       `json:"features"`
	Icon          string                        `json:"icon"`
	Name          string                        `json:"name"`
	Repository    string                        `json:"repository"`
	Versions      map[string]map[string]Version `json:"versions"`
	Website       string                        `json:"website"`
}

type Apps map[string]App

var httpClient = &http.Client{Timeout: 5 * time.Second}

var AppsUrl = "https://apps.coopcloud.tech"

func readJson(url string, target interface{}) error {
	res, err := httpClient.Get(url)
	if err != nil {
		return err
	}
	defer res.Body.Close()
	return json.NewDecoder(res.Body).Decode(target)
}

func AppsFSIsLatest() (bool, error) {
	res, err := httpClient.Head(AppsUrl)
	if err != nil {
		return false, err
	}

	lastModified := res.Header["Last-Modified"][0]
	parsed, err := time.Parse(time.RFC1123, lastModified)
	if err != nil {
		return false, err
	}

	info, err := os.Stat(config.APPS_JSON)
	if err != nil {
		if os.IsNotExist(err) {
			return false, nil
		}
		return false, err
	}

	localModifiedTime := info.ModTime().Unix()
	remoteModifiedTime := parsed.Unix()

	if localModifiedTime < remoteModifiedTime {
		return false, nil
	}

	return true, nil
}

func ReadApps() (Apps, error) {
	apps := make(Apps)

	appsFSIsLatest, err := AppsFSIsLatest()
	if err != nil {
		return nil, err
	}

	if !appsFSIsLatest {
		if err := ReadAppsWeb(&apps); err != nil {
			return nil, err
		}
		return apps, nil
	}

	if err := ReadAppsFS(&apps); err != nil {
		return nil, err
	}

	return apps, nil
}

func ReadAppsFS(target interface{}) error {
	appsJsonFS, err := ioutil.ReadFile(config.APPS_JSON)
	if err != nil {
		return err
	}
	if err := json.Unmarshal(appsJsonFS, &target); err != nil {
		return err
	}
	return nil
}

func ReadAppsWeb(target interface{}) error {
	if err := readJson(AppsUrl, &target); err != nil {
		return err
	}

	appsJson, err := json.MarshalIndent(target, "", "    ")
	if err != nil {
		return err
	}

	if err := ioutil.WriteFile(config.APPS_JSON, appsJson, 0644); err != nil {
		return err
	}

	return nil
}

func SortByAppName(apps Apps) []string {
	var names []string
	for name := range apps {
		names = append(names, name)
	}
	sort.Strings(names)
	return names
}

var recipeListCommand = &cli.Command{
	Name:    "list",
	Aliases: []string{"ls"},
	Action: func(c *cli.Context) error {
		apps, err := ReadApps()
		if err != nil {
			logrus.Fatal(err.Error())
		}
		tableCol := []string{"Name", "Category", "Status"}
		table := createTable(tableCol)
		for _, name := range SortByAppName(apps) {
			app := apps[name]
			status := fmt.Sprintf("%v", app.Features.Status)
			tableRow := []string{app.Name, app.Category, status}
			table.Append(tableRow)
		}
		table.Render()
		return nil
	},
}

var RecipeCommand = &cli.Command{
	Name:     "recipe",
	HideHelp: true,
	Subcommands: []*cli.Command{
		recipeListCommand,
	},
}