package admin

import (
	"encoding/json"
	"fmt"
	"net/http"
	"strconv"
	"time"

	"git.maze.io/maze/styx/dataset"
)

func (a *Admin) apiLists(w http.ResponseWriter, r *http.Request) {
	lists, err := a.Storage.Lists()
	if err != nil {
		a.handleAPIError(w, r, err)
		return
	}
	a.jsonResponse(w, r, lists)
}

func (a *Admin) apiList(w http.ResponseWriter, r *http.Request) {
	id, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
	if err != nil {
		a.handleAPIError(w, r, err)
		return
	}
	list, err := a.Storage.ListByID(id)
	if err != nil {
		a.handleAPIError(w, r, err)
		return
	}
	a.jsonResponse(w, r, list)
}

func (a *Admin) apiListCreate(w http.ResponseWriter, r *http.Request) {
	var request struct {
		dataset.List
		Groups    []int64   `json:"groups"`
		ID        int64     `json:"id"`         // mask, not used
		CreatedAt time.Time `json:"created_at"` // mask, not used
		UpdatedAt time.Time `json:"updated_at"` // mask, not used
	}
	if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
		a.handleAPIError(w, r, err)
		return
	}

	if err := a.verifyList(&request.List); err != nil {
		a.handleAPIError(w, r, err)
		return
	}

	request.List.Groups = request.List.Groups[:0]
	for _, id := range request.Groups {
		group, err := a.Storage.GroupByID(id)
		if err != nil {
			a.handleAPIError(w, r, err)
			return
		}
		request.List.Groups = append(request.List.Groups, group)
	}

	if err := a.Storage.SaveList(&request.List); err != nil {
		a.handleAPIError(w, r, err)
		return
	}

	a.jsonResponse(w, r, request.List)
}

func (a *Admin) apiListDelete(w http.ResponseWriter, r *http.Request) {
	id, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
	if err != nil {
		a.handleAPIError(w, r, err)
		return
	}
	list, err := a.Storage.ListByID(id)
	if err != nil {
		a.handleAPIError(w, r, err)
		return
	}
	if err = a.Storage.DeleteList(list); err != nil {
		a.handleAPIError(w, r, err)
		return
	}
	a.jsonResponse(w, r, nil)
}

func (a *Admin) verifyList(list *dataset.List) error {
	switch list.Type {
	case dataset.ListTypeDomain, dataset.ListTypeNetwork:
	default:
		return apiError{Err: fmt.Errorf("unknown list type %q", list.Type)}
	}

	return nil
}