interface ServerChatRoomMessage {
	MBCHC_ID?: number
}

namespace BCE {
	interface Matcher {
		Tester: RegExp
		Criteria?: {
			TargetIsPlayer?: boolean
			SenderIsPlayer?: boolean
			DictionaryMatchers?: Array<OBJ<string>>
		}
	}
	interface Trigger {
		Event: string
		Type: 'Emote' | 'Activity' | 'Action'
		Matchers: Matcher[]
	}
	interface Patcher {
		timer: number | undefined
		patches: Array<[RegExp, string]>
		cfs: {[k in 'anim' | 'pose']: () => Iterable<string>}
		gen: (comp_func: () => Iterable<string>) => (this: Optional<ICommand, 'Tag'>) => undefined
		copy(t: Trigger): Trigger
		patch(): true | undefined
	}
}

type SUBCOMMANDS = {
	[k: string]: {
		desc: string
		args?: {[n: string]: OBJ}
		cb: (mbchc: Window['MBCHC'], args: string[], __: unknown, ___?: unknown) => void
	}
};

interface Window {
	MBCHC: {
		loader: () => void
		DO_DATA: {
			zones: OBJ<string>
			verbs: {
				[verb: string]: {
					[zone: string]: {
						self: string[]
						others: string[]
					}
				}
			}
		}
		MAP_ACTIONS: {
			[verb: string]: {
				[zones: string]: {
					all?: string
					self?: string
					others?: string
				}
			}
		}
		MAP_ZONES: {[zone: string]: string[]}
		LOADED: boolean
		NEXT_MESSAGE: number
		LOG_MESSAGES: boolean
		LAST_HACKED: number | undefined
		version: string
		VERSION: string
		Settings: Settings.Methods
		TZ: TZ_Cache
		SUBCOMMANDS_MBCHC: SUBCOMMANDS
		H: InputHistory
		U: Utils
		AUTOHACK_ENABLED: boolean
		RE_PREF_ACTIVITY_ME: RegExp
		RE_PREF_ACTIVITY: RegExp
		RE_ACT_CIDS: RegExp
		RE_LAST_WORD: RegExp
		RE_LAST_LETTER: RegExp
		RE_ACTIVITY: RegExp
		UTC_OFFSET: number
		calculate_maps(): void
		normalise_message(text: string, options?: OBJ<boolean>): string
		donate_data(target: string): void
		run_activity(char: Character, ag: AssetGroupItemName, action: ActivityName): void
		send_activity(message: string): void
		set_timezone(args: string[]): number | undefined
		command_mbchc(this: Optional<ICommand, 'Tag'>, args: string, msg: string, parsed: string[]): undefined
		command_activity(this: Optional<ICommand, 'Tag'>, args: string, msg: string, parsed: string[]): undefined
		command_do(this: Optional<ICommand, 'Tag'>, args: string, msg: string, parsed: string[]): undefined
	}
	bcModSdk?: import('./node_modules/bondage-club-mod-sdk/dist/bcmodsdk.d.ts').ModSDKGlobalAPI;
	FBC_VERSION?: string
	bce_ActivityTriggers?: BCE.Trigger[]
	bce_EventExpressions?: OBJ
}

type OBJ<T = unknown> = Record<string, T>;
type FUN = (...args: never[]) => unknown;

/**
 * Stands for "Value or Function". Not remotely ideal, but the best I can come up with.
 */
type VOF<F extends FUN> = undefined | boolean | number | bigint | string | symbol | OBJ | Set<unknown> | Map<unknown, unknown> | FP.Interval | F;

/**
 * I can write Haskell in every language.
 * I was unbelievably tempted to go with emojis here, but I'm not a monster of this caliber.
 * @see https://8fw.me/hell/a8aaaefcb6e30ec4b2e398c70d49b72a6b53232f.png
 */
namespace FP {
	interface Interval {
		proxy: object // eslint-disable-line @typescript-eslint/ban-types
		min: number
		max: number
		mini: boolean
		maxi: boolean
		has(_: unknown, x: string): boolean
	}

	interface Pipeline<T> {
		proxy: PipelineProxy<T>
		me<N>(iterable: Iterable<N>): PipelineProxy<N>
		[Symbol.iterator](): Iterator<T>
		rdc<R>(initial: R, func: (accumulator: R, value: T) => R): R
		any(func: (v: T) => boolean): boolean
		all(func: (v: T) => boolean): boolean
		map<R>(func: (value: T) => R): PipelineProxy<R>
		sel(func: (value: T) => boolean): PipelineProxy<T>
	}
	interface PipelineProxy<T> extends Pipeline<T> {
		[i: number]: T | undefined
	}

	/**
	 * Creates an iteration pipeline.
	 */
	type P = <T>(iterable: Iterable<T>) => PipelineProxy<T>;

	/**
	 * A silly helper to kinda c[au]rry values. Basically equivalent to:
	 * `const a = value; return func(a)`
	 * Stands for "Carry, Use, Return".
	 */
	type cur = <T, R>(value: T, func: (value: T) => R) => R;

	/**
	 * Convert `null` to `undefined`.
	 */ // eslint-disable-next-line @typescript-eslint/ban-types
	type n2u = <T>(value: T | undefined | null) => T | undefined;

	/**
	 * Enumerate keys of an object. Type-safe, also shorter.
	 */
	type enu = <O extends OBJ>(object: O) => Array<keyof O>;

	/**
	 * Like `carry()` but does nothing if `value` is `null` or `undefined`.
	 * Something like an `Option<>` when you want to just pass `undefined` along, but
	 * run a function on actual values. Also coverts `null` to `undefined`.
	 */ // eslint-disable-next-line @typescript-eslint/ban-types
	type val = <T, R>(value: T | null | undefined, func: (value: T) => R) => R | undefined;

	/**
	 * `+` as a function
	 */
	type add = (x: number, y: number) => number;

	/**
	 * `-` as a function
	 */
	type sub = (x: number, y: number) => number;

	/**
	 * `>` as a function
	 */
	type cgt = (x: number, y: number) => boolean;

	/**
	 * `>=` as a function
	 */
	type cge = (x: number, y: number) => boolean;

	/**
	 * `<` as a function
	 */
	type clt = (x: number, y: number) => boolean;

	/**
	 * `<=` as a function
	 */
	type cle = (x: number, y: number) => boolean;

	/**
	 * Converts a string into a base 10 integer. Not only is it shorter than `Number.parseInt`,
	 * it also converts `NaN` to `undefined`, because I find it much easier to only have
	 * one nil value for everything.
	 */
	type int = (text: string) => number | undefined;

	/**
	 * This is a type assertion helper for Typescript. Probably not very useful in general.
	 */
	type fun = <F extends FUN>(func: unknown) => func is F;

	/**
	 * Takes anything, ignores non-functions, calls functions with supplied parameters.
	 */
	type run = <F extends FUN>(functions_or_values: Array<VOF<F>>, ...args: Parameters<F>) => true;

	/**
	 * Takes anything, ignores non-functions, calls functions with `undefined` as a single parameter.
	 */
	type yes = (...args: Array<VOF<(_: undefined) => unknown>>) => true;

	/**
	 * Takes anything, ignores non-functions, calls functions with a single provided parameter.
	 * Always returns the parameter itself.
	 */
	type mut = <T>(value: T, ...args: Array<VOF<(value: T) => unknown>>) => T;

	/**
	 * `delete` as a function
	 */ // eslint-disable-next-line @typescript-eslint/ban-types
	type del = <T extends object>(object: T, property: keyof T) => T;

	/**
	 * Short for `assert`. Throws, if value is `undefined`, or if `condition(value)` is false.
	 */
	type ass = <T>(error: string, value: T | undefined, condition?: (value: T) => boolean) => T | never;

	/**
	 * Casts value as a given prototype or returns undefined.
	 */
	type asa = <T>(prototype: new () => T, value: unknown) => T | undefined;

	/**
	 * `catch` as a function. Short for `rescue`.
	 */
	type rsc = (operation: (_: undefined) => unknown, exception_handler: (error: unknown) => unknown) => true;

	/**
	 * Returns a proxy for `in` operator.
	 * Use it like `2 in rng(0, 4)`.
	 */ // eslint-disable-next-line @typescript-eslint/ban-types
	type rng = (min: number, max: number, min_inclusive?: boolean, max_inclusive?: boolean) => object;

	/**
	 * Something slightly better than `Boolean()`.
	 * True is `null`, `undefined`, `false`, empty strings, sets, maps, arrays and objects.
	 * Short for "empty".
	 */
	type m_t = (value: unknown) => boolean;

	/**
	 * `while()` as a function. Executes the second callback while the first one is true.
	 * Always bound by max number of iterations.
	 * Returns the last value from the action or undefined if the action never ran.
	 */
	type loo = <T>(max: number, condition: (_: undefined) => boolean, action: (_: undefined) => T) => T | undefined;

}

namespace SDK {
	type GDPT<F> = import('./node_modules/bondage-club-mod-sdk/dist/bcmodsdk.d.ts').GetDotedPathType<typeof globalThis, F>;
	type Void<F extends FUN> = (...args: Parameters<F>) => unknown;
	type Hook = <F extends string>(name: F, hook: Void<GDPT<F>>) => () => unknown;
}

namespace Cons {
	type MS = {w: 'warn', i: 'info', d: 'debug', l: 'log'};
	type E = (error: unknown) => true;
	type F = (message: string) => true;
	interface Wrap {
		readonly ms: MS
		e: E
		w: F
		i: F
		d: F
		l: F
		gen: (m: keyof MS) => F
	}
}

namespace Settings {
	/**
	 * The whole `Player.OnlineSettings`.
	 */
	type V0 = PlayerOnlineSettings & {MBCHC?: {timezones?: Record<number, number>}};

	/**
	 * Specifically `MBCHC` inside `Player.ExtensionSettings`.
	 */
	interface V1 {
		TZ: Record<number, number>
	}

	interface Methods {
		migrate_0_1(v0: V0): true
		save(func?: (v1: V1) => unknown): true
		replace(new_v1: V1): true
		'purge!'(): true
		get v0(): V0 | undefined
		get v1(): V1
	}
}

/**
 * We need a place to cache the timezones instead of the `Character` object itself.
 */
interface TZ_Cache {
	map: Map<number, number>
	RE: RegExp
	parse(description: string | undefined): number | undefined
	memo(member_number: number, description?: string | undefined): number | undefined
	lookup(character: Character): number | undefined
}

interface Utils {
	remove_loader_hook: (() => unknown) | undefined
	RE: {SPACES: RegExp, REL: {L: RegExp, R: RegExp}, '@': [RegExp, RegExp]}
	RGB: {Polly: string, Mute: string}
	ACT: string,
	get crc(): Character[]
	get ic(): HTMLTextAreaElement | undefined
	cid(character: Character): number | undefined
	dn(character: Character): string
	current(): string
	style<T>(query: string, func: (s: CSSStyleDeclaration) => T): T | undefined
	inform(html: string): true
	report(error: unknown): true

	/**
	 * Splits a string into words by continuous whitespace sequences. Some examples:
	 * ```
	 * ""      => [""]
	 * " "     => ["", ""]
	 * "f   g" => ["f", "g"]
	 * " f g " => ["", "f", "g", ""]
	 * ```
	 */
	split(text: string): string[]
	abs2char(index: number): Character
	rel2char(target: string): Character
	cid2char(cid: number): Character
	target2char(target: string): Character
	mkdiv(html?: string): HTMLDivElement
	bell(): true
	targets(me2?: boolean, check_perms?: boolean): Set<string>
	complete_mbchc(this: Optional<ICommand, 'Tag'>): undefined
	complete_do_target(actions: {self: unknown, others: unknown}): Set<string>
	complete_do(this: Optional<ICommand, 'Tag'>): undefined
	replace_me(_match: string, _offset: number, whole: string): string
	//pad_chat(chat: HTMLDivElement): undefined
}

interface Complete {
	S_OPTS: {behavior: 'instant'}

	/**
	 * The suggestions panel.
	 * Its structure is (outer div) -> (container div) -> (multiple suggestion div elements)
	 */
	e: HTMLDivElement

	/**
	 * The container div.
	 */
	get div(): Element | undefined

	/**
	 * Longest common prefix, or an empty string for an empty set.
	 */
	lcp(candidates: Set<string>): string

	/**
	 * !WARNING! Mutate the given set in accordance with the input.
	 * Returns the input with completion done and removes all failed candidates.
	 * If the set is empty, the completion failed and the result is the unmodified input.
	 * If the set has more than one value, these are all new candidates, and the input was completed with the lcp.
	 * Otherwise, the only successful candidate will remain in the set and the input was completed to it.
	 */
	complete_word(input: string, candidates: Set<string>, ignore_case?: boolean | undefined): string

	/**
	 * Show the suggestions to the user.
	 */
	hint(candidates: Set<string>): true

	/**
	 * Returns false if the suggestion panel is visible.
	 */
	get hidden(): boolean

	/**
	 * Makes the suggestions panel disappear.
	 */
	hide(): true

	/**
	 * The whole deal. Will read and modify the chat input window.
	 * Takes a callback that will receive current input split into words
	 * and should return all possible candidates for the word being completed.
	 * Note: if the input ends with whitespace, the last word will be empty.
	 */
	complete(func: (words: string[]) => Set<string>, ignore_case?: boolean | undefined): true

	/**
	 * Case-insensitive complete.
	 */
	icomplete(func: (words: string[]) => Set<string>): true

}

/**
 * So, this is what happens. We have two modes: input mode and history mode. In the history mode the element is read-only.
 * In the input mode:
 *   If the input is empty, we just scroll the history as usual
 *   Otherwise, we build a history set using the input as prefix
 *     The history set filters through the history, keeping only unique lines that start with the prefix along with indices
 *     But we exclude lines that match the input exactly
 *     It keeps the original input in a separate place too
 *   If the set is empty, we bell out
 *   Otherwise, we enter the history mode and invoke the first search
 * In the history mode:
 *   We search up or down, using the index as a starting point for the next match, treating the set as a ring
 *   If the found line is the same as the current line, we bell out
 *   Upon finding a next match, we replace the input with its text and set the index appropriately
 * We exit the history mode using the InputChat keydown handler, on Tab, Escape or Enter
 * Escape restores the saved input, discarding the history line
 * Tab keeps the current text and unlocks the element, allowing it to be edited
 * Enter keeps the current text and sends it as the message as usual
 */
interface InputHistory {
	/**
	 * Whether the chat log is scrolled to the end when we enter history mode.
	 */
	bottom: boolean | undefined

	/**
	 * The initial user input when we enter the history mode.
	 */
	input: string | undefined

	/**
	 * The indices of the lines that match the prefix.
	 */
	ids: Set<number> | undefined

	/**
	 * Enter the history mode.
	 */
	enter(textarea: HTMLTextAreaElement, input: string, bottom: boolean, ids: Set<number>): true

	/**
	 * Exit the history mode and optionally restore original input.
	 */
	exit(textarea: HTMLTextAreaElement, restore_input: boolean): true
}

// FIXME spread around readonly where appropriate