import { $resyncPrune } from "./symbols.js";
import type { PrimitiveType, RawPrimitiveType } from "../annotations.js";
import type { Schema } from "../Schema.js";
import type { ArraySchema } from "./custom/ArraySchema.js";
import type { CollectionSchema } from "./custom/CollectionSchema.js";
import type { MapSchema } from "./custom/MapSchema.js";
import type { SetSchema } from "./custom/SetSchema.js";
import type { StreamSchema } from "./custom/StreamSchema.js";
import type { FieldBuilder } from "./builder.js";
export type Constructor<T = {}> = new (...args: any[]) => T;
type PrimitiveStringToType<T> = T extends "string" ? string : T extends "number" | "int8" | "uint8" | "int16" | "uint16" | "int32" | "uint32" | "int64" | "uint64" | "float32" | "float64" ? number : T extends "bigint64" | "biguint64" ? bigint : T extends "boolean" ? boolean : T;
/**
 * What the decoder callbacks accept as "a collection": the public shape, which
 * a plain array satisfies too — `@type([X]) items: X[]` is a common way to
 * declare a field. {@link Collection} is the runtime contract on top of it.
 */
export interface CollectionLike<K = any, V = any, IT = V> {
    [Symbol.iterator](): IterableIterator<IT>;
    forEach(callback: Function): void;
    entries(): IterableIterator<[K, V]>;
}
export interface Collection<K = any, V = any, IT = V> extends CollectionLike<K, V, IT> {
    /** See {@link $resyncPrune} — every collection kind must declare its resync-sweep semantics. */
    [$resyncPrune](visited: Set<number | string>, prune: (value: V, identity: number | string) => void, keep: (value: V) => void): void;
}
export type InferValueType<T> = T extends FieldBuilder<infer V> ? V : T extends "string" ? string : T extends "number" ? number : T extends "int8" ? number : T extends "uint8" ? number : T extends "int16" ? number : T extends "uint16" ? number : T extends "int32" ? number : T extends "uint32" ? number : T extends "int64" ? number : T extends "uint64" ? number : T extends "float32" ? number : T extends "float64" ? number : T extends "bigint64" ? bigint : T extends "biguint64" ? bigint : T extends "boolean" ? boolean : T extends {
    type: infer ChildType extends PrimitiveType;
} ? InferValueType<ChildType> : T extends {
    type: infer ChildType extends Constructor;
} ? InstanceType<ChildType> : T extends {
    type: Array<infer ChildType>;
} ? (ChildType extends Record<string | number, string | number> ? ChildType[keyof ChildType][] : ChildType[]) : T extends {
    type: {
        map: infer ChildType;
    };
} ? (ChildType extends Record<string | number, string | number> ? MapSchema<ChildType[keyof ChildType]> : MapSchema<ChildType>) : T extends {
    type: {
        set: infer ChildType;
    };
} ? (ChildType extends Record<string | number, string | number> ? SetSchema<ChildType[keyof ChildType]> : SetSchema<ChildType>) : T extends {
    type: {
        collection: infer ChildType;
    };
} ? (ChildType extends Record<string | number, string | number> ? CollectionSchema<ChildType[keyof ChildType]> : CollectionSchema<ChildType>) : T extends {
    type: {
        stream: infer ChildType extends Constructor;
    };
} ? StreamSchema<InstanceType<ChildType>> : T extends {
    type: {
        stream: infer ChildType;
    };
} ? StreamSchema<ChildType> : T extends {
    type: infer ChildType;
} ? (ChildType extends Record<string | number, string | number> ? ChildType[keyof ChildType] : ChildType) : T extends Array<infer ChildType extends Constructor> ? ArraySchema<InstanceType<ChildType>> : T extends Array<infer ChildType> ? (ChildType extends Record<string | number, string | number> ? ArraySchema<ChildType[keyof ChildType]> : ArraySchema<PrimitiveStringToType<ChildType>>) : T extends {
    array: infer ChildType extends Constructor;
} ? ArraySchema<InstanceType<ChildType>> : T extends {
    array: infer ChildType;
} ? (ChildType extends Record<string | number, string | number> ? ArraySchema<ChildType[keyof ChildType]> : ArraySchema<PrimitiveStringToType<ChildType>>) : T extends {
    map: infer ChildType extends Constructor;
} ? MapSchema<InstanceType<ChildType>> : T extends {
    map: infer ChildType;
} ? (ChildType extends Record<string | number, string | number> ? MapSchema<ChildType[keyof ChildType]> : MapSchema<PrimitiveStringToType<ChildType>>) : T extends {
    set: infer ChildType extends Constructor;
} ? SetSchema<InstanceType<ChildType>> : T extends {
    set: infer ChildType extends RawPrimitiveType;
} ? SetSchema<InferValueType<ChildType>> : T extends {
    set: infer ChildType;
} ? (ChildType extends Record<string | number, string | number> ? SetSchema<ChildType[keyof ChildType]> : SetSchema<ChildType>) : T extends {
    collection: infer ChildType extends Constructor;
} ? CollectionSchema<InstanceType<ChildType>> : T extends {
    collection: infer ChildType extends RawPrimitiveType;
} ? CollectionSchema<InferValueType<ChildType>> : T extends {
    collection: infer ChildType;
} ? (ChildType extends Record<string | number, string | number> ? CollectionSchema<ChildType[keyof ChildType]> : CollectionSchema<ChildType>) : T extends {
    stream: infer ChildType extends Constructor;
} ? StreamSchema<InstanceType<ChildType>> : T extends {
    stream: infer ChildType;
} ? StreamSchema<ChildType> : T extends Constructor ? InstanceType<T> : T extends Record<string | number, string | number> ? T[keyof T] : T extends PrimitiveType ? T : never;
/**
 * Codecs that can carry a `T` — {@link InferValueType} run backwards, derived
 * from it so the two can't drift. Constrains the element refinement in
 * `t.array<Mark>("uint8")`; `never` (an uncallable overload) when no codec
 * decodes into `T`.
 *
 * `[T] extends [...]` is deliberate: a distributive check would let a mixed
 * union like `string | number` match on either half.
 */
export type CodecFor<T> = {
    [K in RawPrimitiveType]: [T] extends [InferValueType<K>] ? K : never;
}[RawPrimitiveType];
type IsOptionalBuilderKey<T, K extends keyof T> = T[K] extends FieldBuilder<unknown, boolean, infer O extends boolean> ? O : false;
export type InferSchemaInstanceType<T> = {
    -readonly [K in keyof T as IsOptionalBuilderKey<T, K> extends true ? never : K]-?: T[K] extends FieldBuilder<any> ? InferValueType<T[K]> : T[K] extends (...args: any[]) => any ? (T[K] extends new (...args: any[]) => any ? InferValueType<T[K]> : T[K]) : InferValueType<T[K]>;
} & {
    -readonly [K in keyof T as IsOptionalBuilderKey<T, K> extends true ? K : never]?: T[K] extends FieldBuilder<infer V> ? V : never;
} & Schema;
type DataKey<T, K extends keyof T> = K extends keyof Schema ? never : T[K] extends Function ? never : K;
export type NonFunctionPropNames<T> = {
    [K in keyof T]-?: DataKey<T, K>;
}[keyof T];
export type NonFunctionNonPrimitivePropNames<T> = {
    [K in keyof T]-?: [DataKey<T, K>] extends [never] ? never : T[K] extends number | string | boolean ? never : K;
}[keyof T];
type ToJSONValue<U> = U extends Schema ? ToJSON<U> : PrimitiveStringToType<U>;
type ToJSONField<X> = X extends MapSchema<infer U> ? Record<string, ToJSONValue<U>> : X extends Map<string, infer U> ? Record<string, ToJSONValue<U>> : X extends ArraySchema<infer U> ? ToJSONValue<U>[] : X extends SetSchema<infer U> ? ToJSONValue<U>[] : X extends CollectionSchema<infer U> ? ToJSONValue<U>[] : X extends Schema ? ToJSON<X> : X;
type IsOptionalKey<T, K extends keyof T> = undefined extends {} ? ({} extends Pick<T, K> ? true : false) : (undefined extends T[K] ? true : false);
export type ToJSON<T> = {
    -readonly [K in keyof T as IsOptionalKey<T, K> extends true ? never : DataKey<T, K>]-?: ToJSONField<T[K]>;
} & {
    -readonly [K in keyof T as IsOptionalKey<T, K> extends true ? DataKey<T, K> : never]?: ToJSONField<Exclude<T[K], undefined>>;
};
/**
 * The plain DATA shape of a Schema instance type `T`: its synchronized fields
 * with all `Schema` machinery stripped (`assign`, `clone`, `toJSON`, the
 * change-tracking state, the internal symbol keys, …), so a plain object literal
 * satisfies it. Field types — including narrowed primitives like
 * `t.int8<-1 | 0 | 1>()` — are preserved exactly.
 *
 * Use it to type code that operates on schema-shaped *plain objects* rather than
 * decoded instances: deterministic simulation / physics steps, synthesized or
 * buffered input commands, plain DTOs, etc.
 *
 * ```ts
 * function applyInput(state: Player, cmd: Data<MoveInput>) { … }
 * applyInput(player, { moveX: 1, jump: false, dt });   // plain literal — OK
 * ```
 *
 * Unlike {@link ToJSON} (a recursive *serialization* shape), this is a flat
 * structural projection: nested Schema / collection fields keep their instance
 * types.
 */
export type Data<T> = Omit<T, keyof Schema>;
export type IsNever<T> = [T] extends [never] ? true : false;
/**
 * Type helper for .assign() method - allows assigning values in a flexible way
 * - Primitives can be assigned directly
 * - Schema instances can be assigned from plain objects or Schema instances
 * - Collections can be assigned from their JSON representations
 *
 * Keys filter through `DataKey` in the `as` clause — see THE RULE above.
 */
export type AssignableProps<T> = {
    -readonly [K in keyof T as DataKey<T, K>]?: AssignableValue<T[K]>;
};
/**
 * Value-level assignment shape shared by `AssignableProps` and
 * `BuilderInitProps`. Captures the "you can pass the real instance, or the
 * plain-object / array shape" pattern.
 */
export type AssignableValue<V> = V extends MapSchema<infer U> ? MapSchema<U> | Record<string, U extends Schema ? (U | AssignableProps<U>) : U> : V extends ArraySchema<infer U> ? ArraySchema<U> | (U extends Schema ? (U | AssignableProps<U>)[] : U[]) : V extends SetSchema<infer U> ? SetSchema<U> | Set<U> | (U extends Schema ? (U | AssignableProps<U>)[] : U[]) : V extends CollectionSchema<infer U> ? CollectionSchema<U> | (U extends Schema ? (U | AssignableProps<U>)[] : U[]) : V extends Schema ? V | AssignableProps<V> : V;
export type RefHasDefault<C> = C extends {
    prototype: {
        initialize(...args: infer P): any;
    };
} ? (P extends readonly [] ? true : false) : true;
type FieldValue<F> = F extends FieldBuilder<infer V, boolean, boolean> ? V : F extends new (...args: any[]) => infer I ? (I extends Schema ? I : never) : never;
type KeyClass<T, K extends keyof T> = T[K] extends FieldBuilder<unknown, infer D extends boolean, infer O extends boolean> ? (D extends true ? "optional" : O extends true ? "optional" : "required") : T[K] extends new (...args: any[]) => Schema ? (RefHasDefault<T[K]> extends true ? "optional" : "required") : "none";
/**
 * Constructor/init-props type for a schema() fields map. Required fields
 * (primitives without `.default()` or `.optional()`, and Schema refs with
 * non-zero-arg `initialize()`) are `:`; everything else is `?:`.
 *
 * Split by `KeyClass` in the `as` clause — see THE RULE above. `-?` matters
 * under `strictNullChecks: false`: an optional key in the fields map still
 * classifies as "required" there, and would otherwise inherit the `?`.
 */
export type BuilderInitProps<T> = {
    -readonly [K in keyof T as KeyClass<T, K> extends "required" ? K : never]-?: AssignableValue<FieldValue<T[K]>>;
} & {
    -readonly [K in keyof T as KeyClass<T, K> extends "optional" ? K : never]?: AssignableValue<Exclude<FieldValue<T[K]>, undefined>>;
};
export {};