package resolver

import (
	"context"

	"git.aiterp.net/rpdata/api/internal/session"
	"git.aiterp.net/rpdata/api/model/file"
	"git.aiterp.net/rpdata/api/resolver/types"
)

// FileArgs is an arg
type FileArgs struct {
	ID string
}

// File implements the file query
func (r *QueryResolver) File(ctx context.Context, args *FileArgs) (*types.FileResolver, error) {
	file, err := file.FindID(args.ID)
	if err != nil {
		return nil, err
	}

	return &types.FileResolver{F: file}, nil
}

// FilesArgs is an arg
type FilesArgs struct {
	IncludePublic *bool
	MimeTypes     *[]string
}

// Files implements the file query
func (r *QueryResolver) Files(ctx context.Context, args *FilesArgs) ([]*types.FileResolver, error) {
	user := session.FromContext(ctx).User()
	author := ""
	if user != nil {
		author = user.ID
	}

	public := args.IncludePublic != nil && *args.IncludePublic == true

	mimeTypes := []string(nil)
	if args.MimeTypes != nil {
		mimeTypes = *args.MimeTypes
	}

	files, err := file.List(author, public, mimeTypes)
	if err != nil {
		return nil, err
	}

	resolvers := make([]*types.FileResolver, len(files))
	for i := range files {
		resolvers[i] = &types.FileResolver{F: files[i]}
	}

	return resolvers, nil
}

// FileEditArgs is args for the editFile mutation
type FileEditArgs struct {
	Input *struct {
		ID     string
		Name   *string
		Public *bool
	}
}

// EditFile resolves the editFile mutation
func (r *MutationResolver) EditFile(ctx context.Context, args *FileEditArgs) (*types.FileResolver, error) {
	input := args.Input

	user := session.FromContext(ctx).User()
	if user == nil || !user.Permitted("member") {
		return nil, ErrUnauthorized
	}

	file, err := file.FindID(input.ID)
	if err != nil {
		return nil, err
	}
	if file.Author != user.ID && !user.Permitted("file.edit") {
		return nil, ErrUnauthorized
	}

	err = file.Edit(input.Name, input.Public)
	if err != nil {
		return nil, err
	}

	return &types.FileResolver{F: file}, nil
}

// RemoveFile resolves the removeFIle mutation
func (r *MutationResolver) RemoveFile(ctx context.Context, args *FileArgs) (*types.FileResolver, error) {
	user := session.FromContext(ctx).User()
	if user == nil || !user.Permitted("member") {
		return nil, ErrUnauthorized
	}

	file, err := file.FindID(args.ID)
	if err != nil {
		return nil, err
	}
	if file.Author != user.ID && !user.Permitted("file.remove") {
		return nil, ErrUnauthorized
	}

	err = file.Delete()
	if err != nil {
		return nil, err
	}

	return &types.FileResolver{F: file}, nil
}