package queries

import (
	"context"
	"errors"

	"git.aiterp.net/rpdata/api/graphql/loader"
	"git.aiterp.net/rpdata/api/graphql/resolver/types"
	"git.aiterp.net/rpdata/api/model/character"
)

// CharactersArgs is args for characters query
type CharactersArgs struct {
	IDs    *[]string
	Nicks  *[]string
	Author *string
}

// Characters resolves the characters query
func (r *QueryResolver) Characters(ctx context.Context, args *CharactersArgs) ([]*types.CharacterResolver, error) {
	var chars []character.Character
	var err error

	loader := loader.FromContext(ctx)
	if loader == nil {
		return nil, errors.New("no loader")
	}

	switch {
	case args.IDs != nil:
		chars, err = character.ListIDs(*args.IDs...)
	case args.Nicks != nil:
		chars, err = character.ListNicks(*args.Nicks...)
	case args.Author != nil:
		chars, err = character.ListAuthor(*args.Author)
	default:
		chars, err = character.List()
	}

	if err != nil {
		return nil, err
	}

	resolvers := make([]*types.CharacterResolver, 0, len(chars))
	for i := range chars {
		if chars[i].ID == "" {
			continue
		}

		resolvers = append(resolvers, &types.CharacterResolver{C: chars[i]})
	}

	return resolvers, nil
}