package main

import (
	"context"
	"fmt"
	garage "git.deuxfleurs.fr/garage-sdk/garage-admin-sdk-golang"
	"github.com/gorilla/mux"
	"log"
	"net/http"
	"strings"
)


func gadmin() (*garage.APIClient, context.Context) {
	// Set Host and other parameters
	configuration := garage.NewConfiguration()
	configuration.Host = config.S3AdminEndpoint

	// We can now generate a client
	client := garage.NewAPIClient(configuration)

	// Authentication is handled through the context pattern
	ctx := context.WithValue(context.Background(), garage.ContextAccessToken, config.S3AdminToken)
	return client, ctx
}

func grgCreateKey(name string) (*garage.KeyInfo, error) {
	client, ctx := gadmin()

	kr := garage.AddKeyRequest{Name: &name}
	resp, _, err := client.KeyApi.AddKey(ctx).AddKeyRequest(kr).Execute()
	if err != nil {
		fmt.Printf("%+v\n", err)
		return nil, err
	}
	return resp, nil
}

func grgGetKey(accessKey string) (*garage.KeyInfo, error) {
	client, ctx := gadmin()

	resp, _, err := client.KeyApi.GetKey(ctx, accessKey).Execute()
	if err != nil {
		fmt.Printf("%+v\n", err)
		return nil, err
	}
	return resp, nil
}



func grgCreateWebsite(gkey, bucket string, quotas *UserQuota) (*garage.BucketInfo, error) {
	client, ctx := gadmin()

	br := garage.NewCreateBucketRequest()
	br.SetGlobalAlias(bucket)

	// Create Bucket
	binfo, _, err := client.BucketApi.CreateBucket(ctx).CreateBucketRequest(*br).Execute()
	if err != nil {
		fmt.Printf("%+v\n", err)
		return nil, err
	}

	// Allow user's key
	ar := garage.AllowBucketKeyRequest{
		BucketId:    *binfo.Id,
		AccessKeyId: gkey,
		Permissions: *garage.NewAllowBucketKeyRequestPermissions(true, true, true),
	}
	binfo, _, err = client.BucketApi.AllowBucketKey(ctx).AllowBucketKeyRequest(ar).Execute()
	if err != nil {
		fmt.Printf("%+v\n", err)
		return nil, err
	}

	// Expose website and set quota
	wr := garage.NewUpdateBucketRequestWebsiteAccess()
	wr.SetEnabled(true)
	wr.SetIndexDocument("index.html")
	wr.SetErrorDocument("error.html")

	qr := quotas.DefaultWebsiteQuota()

	ur := garage.NewUpdateBucketRequest()
	ur.SetWebsiteAccess(*wr)
	ur.SetQuotas(*qr)

	binfo, _, err = client.BucketApi.UpdateBucket(ctx, *binfo.Id).UpdateBucketRequest(*ur).Execute()
	if err != nil {
		fmt.Printf("%+v\n", err)
		return nil, err
	}

	// Return updated binfo
	return binfo, nil
}

func grgAddGlobalAlias(bid, alias string) (*garage.BucketInfo, error) {
	client, ctx := gadmin()

	resp, _, err := client.BucketApi.PutBucketGlobalAlias(ctx).Id(bid).Alias(alias).Execute()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	return resp, nil
}

func grgAddLocalAlias(bid, key, alias string) (*garage.BucketInfo, error) {
	client, ctx := gadmin()

	resp, _, err := client.BucketApi.PutBucketLocalAlias(ctx).Id(bid).AccessKeyId(key).Alias(alias).Execute()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	return resp, nil
}

func grgDelGlobalAlias(bid, alias string) (*garage.BucketInfo, error) {
	client, ctx := gadmin()

	resp, _, err := client.BucketApi.DeleteBucketGlobalAlias(ctx).Id(bid).Alias(alias).Execute()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	return resp, nil
}

func grgDelLocalAlias(bid, key, alias string) (*garage.BucketInfo, error) {
	client, ctx := gadmin()

	resp, _, err := client.BucketApi.DeleteBucketLocalAlias(ctx).Id(bid).AccessKeyId(key).Alias(alias).Execute()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	return resp, nil
}

func grgGetBucket(bid string) (*garage.BucketInfo, error) {
	client, ctx := gadmin()

	resp, _, err := client.BucketApi.GetBucketInfo(ctx, bid).Execute()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	return resp, nil

}

// --- Start page rendering functions

func handleGarageKey(w http.ResponseWriter, r *http.Request) {
	user := RequireUserHtml(w, r)
	if user == nil {
		return
	}

	tKey := getTemplate("garage_key.html")
	tKey.Execute(w, user)
}

func handleGarageWebsiteList(w http.ResponseWriter, r *http.Request) {
	user := RequireUserHtml(w, r)
	if user == nil {
		return
	}

	tWebsiteList := getTemplate("garage_website_list.html")
	tWebsiteList.Execute(w, user)
}

func handleGarageWebsiteNew(w http.ResponseWriter, r *http.Request) {
	user := RequireUserHtml(w, r)
	if user == nil {
		return
	}

	tWebsiteNew := getTemplate("garage_website_new.html")
	if r.Method == "POST" {
		r.ParseForm()

		bucket := strings.Join(r.Form["bucket"], "")
		if bucket == "" {
			bucket = strings.Join(r.Form["bucket2"], "")
		}
		if bucket == "" {
			log.Println("Form empty")
			// @FIXME we need to return the error to the user
			tWebsiteNew.Execute(w, nil)
			return
		}

		keyInfo, err := user.S3KeyInfo()
		if err != nil {
			log.Println(err)
			// @FIXME we need to return the error to the user
			tWebsiteNew.Execute(w, nil)
			return
		}

		binfo, err := grgCreateWebsite(*keyInfo.AccessKeyId, bucket, user.Quota)
		if err != nil {
			log.Println(err)
			// @FIXME we need to return the error to the user
			tWebsiteNew.Execute(w, nil)
			return
		}

		http.Redirect(w, r, "/garage/website/b/"+*binfo.Id, http.StatusFound)
		return
	}

	tWebsiteNew.Execute(w, nil)
}

type webInspectView struct {
	User        *LoggedUser
	Bucket      *garage.BucketInfo
	IndexDoc    string
	ErrorDoc    string
	MaxObjects  int64
	MaxSize     int64
	UsedSizePct float64
}

func handleGarageWebsiteInspect(w http.ResponseWriter, r *http.Request) {
	user := RequireUserHtml(w, r)
	if user == nil {
		return
	}

	bucketId := mux.Vars(r)["bucket"]
	// @FIXME check that user owns the bucket....

	binfo, err := grgGetBucket(bucketId)
	if err != nil {
		log.Println(err)
		return
	}

	wc := binfo.GetWebsiteConfig()
	q := binfo.GetQuotas()

	view := webInspectView{
		User:       user,
		Bucket:     binfo,
		IndexDoc:   (&wc).GetIndexDocument(),
		ErrorDoc:   (&wc).GetErrorDocument(),
		MaxObjects: (&q).GetMaxObjects(),
		MaxSize:    (&q).GetMaxSize(),
	}

	tWebsiteInspect := getTemplate("garage_website_inspect.html")
	tWebsiteInspect.Execute(w, &view)
}