import { Context } from "koa";
import { FormControlContext } from "../controls/form-control.js";
import { Textarea } from "../controls/textarea.js";
import { FormDataValue } from "../form-types.js";
import { FieldParseResult } from "./field.js";
import { SimpleFormField } from "./simple-form-field.js";

export class JSONField<Required extends boolean> extends SimpleFormField<
	Required,
	Textarea,
	Record<string, unknown>
> {
	constructor(required: Required) {
		super(required, "text");
	}

	getControl(): Textarea {
		return new Textarea(this);
	}

	public getEmptyValue(): Record<string, unknown> {
		return {};
	}

	async parse(
		ctx: Context,
		raw_value: FormDataValue
	): Promise<FieldParseResult<Record<string, unknown>>> {
		return {
			parsable: true,
			error: null,
			parsed_value: JSON.parse(raw_value as string) as Record<
				string,
				unknown
			>,
		};
	}

	async getSealiousCreateValue(
		fctx: FormControlContext
	): Promise<Record<string, unknown> | null> {
		const { parsed } = await this.getParsedValue(
			fctx.ctx,
			fctx.data.raw_values
		);
		return parsed;
	}
}