import { BuilderExtract, IBuilder } from "./builder";
import { Config } from "./config";
import { List } from "./list";
import { Variants } from "./variants";
import {
  ConfigSpec,
  UniqueBy,
  ValueSpec,
  ValueSpecList,
  ValueSpecNumber,
  ValueSpecString,
} from "../../types/config-types";

export type DefaultString =
  | string
  | {
      charset: string | null | undefined;
      len: number;
    };
export type Description = {
  name: string;
  description: string | null;
  warning: string | null;
};
export type Default<A> = {
  default: A;
};
export type NullableDefault<A> = {
  default: null | A;
};

export type StringSpec = {
  masked: boolean | null;
  placeholder: string | null;
  pattern: null | string;
  "pattern-description": null | string;
  textarea: boolean | null;
};
export type NumberSpec = {
  range: string;
  integral: boolean;
  units: string | null;
  placeholder: string | null;
};
export type Nullable = {
  nullable: boolean;
};

/**
 * A value is going to be part of the form in the FE of the OS.
 * Something like a boolean, a string, a number, etc.
 * in the fe it will ask for the name of value, and use the rest of the value to determine how to render it.
 * While writing with a value, you will start with `Value.` then let the IDE suggest the rest.
 * for things like string, the options are going to be in {}.
 * Keep an eye out for another config builder types as params.
 * Note, usually this is going to be used in a `Config` {@link Config} builder.
 ```ts
    Value.string({
      name: "Name of This Value",
      description: "Going to be what the description is in the FE, hover over",
      warning: "What the warning is going to be on warning situations",
      default: null,
      nullable: false,
      masked: null, // If there is a masked, then the value is going to be masked in the FE, like a password
      placeholder: null, // If there is a placeholder, then the value is going to be masked in the FE, like a password
      pattern: null, // A regex pattern to validate the value
      "pattern-description": null,
      textarea: null
    })
 ```
 */
export class Value<A extends ValueSpec> extends IBuilder<A> {
  static boolean<A extends Description & Default<boolean>>(a: A) {
    return new Value({
      type: "boolean" as const,
      ...a,
    });
  }
  static string<
    A extends Description &
      NullableDefault<DefaultString> &
      Nullable &
      StringSpec
  >(a: A) {
    return new Value({
      type: "string" as const,
      ...a,
    } as ValueSpecString);
  }
  static number<
    A extends Description & NullableDefault<number> & Nullable & NumberSpec
  >(a: A) {
    return new Value({
      type: "number" as const,
      ...a,
    } as ValueSpecNumber);
  }
  static enum<
    A extends Description &
      Default<string> & {
        values: readonly string[] | string[];
        "value-names": Record<string, string>;
      }
  >(a: A) {
    return new Value({
      type: "enum" as const,
      ...a,
    });
  }
  static object<
    A extends {
      name: string;
      description: string | null;
      warning: string | null;
      default: null | { [k: string]: unknown };
      "display-as": null | string;
      "unique-by": null | string;
      spec: Config<ConfigSpec>;
      "value-names": Record<string, string>;
    }
  >(a: A) {
    const { spec: previousSpec, ...rest } = a;
    const spec = previousSpec.build() as BuilderExtract<A["spec"]>;
    return new Value({
      type: "object" as const,
      ...rest,
      spec,
    });
  }
  static union<
    A extends Description &
      Default<string> & {
        tag: {
          id: B;
          name: string;
          description: string | null;
          warning: string | null;
          "variant-names": {
            [key: string]: string;
          };
        };
        variants: Variants<{ [key: string]: ConfigSpec }>;
        "display-as": string | null;
        "unique-by": UniqueBy;
      },
    B extends string
  >(a: A) {
    const { variants: previousVariants, ...rest } = a;
    const variants = previousVariants.build() as BuilderExtract<A["variants"]>;
    return new Value({
      type: "union" as const,
      ...rest,
      variants,
    });
  }

  static list<A extends List<ValueSpecList>>(a: A) {
    return new Value(a.build());
  }
}