package main

import (
	"bytes"
	"encoding/json"
	"io/ioutil"
	"net/http"

	shell "github.com/ipfs/go-ipfs-api"
	"tulpa.dev/within/wasmcloud/cmd/internal"
	"within.website/ln"
	"within.website/olin/namegen"
)

func createHandler(w http.ResponseWriter, r *http.Request, u *User) {
	if !u.CanCreateHandlers {
		http.Error(w, "you can't create handlers, contact support", http.StatusForbidden)
		return
	}

	ctx := r.Context()
	sh := shell.NewShell(*ipfsURL)
	data, err := ioutil.ReadAll(r.Body)
	if err != nil {
		ln.Error(ctx, err)
		http.Error(w, "invalid data", http.StatusBadRequest)
		return
	}
	r.Body.Close()

	var hdlr internal.Handler
	err = json.Unmarshal(data, &hdlr)
	if err != nil {
		ln.Error(ctx, err)
		http.Error(w, "not json", http.StatusBadRequest)
		return
	}

	switch string(hdlr.ABI) {
	case string(internal.CWA), string(internal.Dagger):
	default:
		ln.Log(ctx, ln.Info("unknown ABI"), ln.F{"abi": hdlr.ABI})
		http.Error(w, "unknown ABI", http.StatusBadRequest)
		return
	}

	cid, err := sh.Add(bytes.NewBuffer(hdlr.WASM))
	if err != nil {
		ln.Error(ctx, err)
		http.Error(w, "can't upload wasm to storage", http.StatusInternalServerError)
		return
	}

	n := namegen.Next()
	h := Handler{
		Name:   n,
		User:   *u,
		UserID: u.ID,
		Path:   cid,
	}

	if err := db.Save(&h).Error; err != nil {
		ln.Error(ctx, err)
		http.Error(w, "can't save record", http.StatusInternalServerError)
		return
	}

	json.NewEncoder(w).Encode(h)
}