// The plugin's configuration model — the single source of truth for the sync engine, editable by hand
// (headless boxes) or by the web UI. Everything the engine needs is derivable from this file plus the
// exporter's `punktfunk-library.json`; `resolveConfig` fills defaults so the rest of the code works
// against a fully-populated shape.

/** When and how often we re-read the export and reconcile. */
export interface SyncOptions {
	/** Interval poll in minutes — the backstop under the exporter-driven file watch. */
	pollMinutes: number;
	/** Watch the exporter's output directory and reconcile on change (the primary trigger). */
	watch: boolean;
	/** Debounce window for coalescing watch/poll-triggered re-reads (ms). */
	debounceMs: number;
}

/** Which Playnite games become library entries. */
export interface FilterOptions {
	/** Only sync games Playnite marks installed (default). Off = include not-yet-installed titles too. */
	installedOnly: boolean;
	/** Include games flagged Hidden in Playnite (default off). */
	includeHidden: boolean;
	/** If non-empty, keep ONLY games whose source is in this list ("Steam", "GOG", …). */
	sources: string[];
	/** Drop games whose source is in this list (applied after `sources`). */
	excludeSources: string[];
}

/** How cover art reaches the clients. Playnite art is local files on the host, and the host only
 *  proxies Steam art — so for a provider entry we inline the cover as a size-capped `data:` URL that
 *  clients render directly. `off` syncs titles with no art. */
export type ArtMode = "dataurl" | "off";

export interface ArtOptions {
	mode: ArtMode;
	/** Skip an image whose file is larger than this (bytes) — a `data:` URL bloats the library payload,
	 *  so covers over the cap are dropped rather than inlined. */
	maxBytes: number;
	/** Also inline the Playnite background as `hero` art (usually large — off by default). */
	includeBackground: boolean;
}

export interface UiOptions {
	/** Fallback standalone mode: serve the UI on a fixed port behind a password instead of via the
	 *  console proxy. For host-only installs without the console. */
	standalone: boolean;
	/** Standalone bind port. */
	port: number;
	/** Standalone bind address (defaults to loopback; a non-loopback bind REQUIRES a password). */
	bind: string;
	/** scrypt password hash (`scrypt$<saltB64>$<hashB64>`), required for a non-loopback standalone bind. */
	passwordHash?: string;
}

/** The on-disk config as authored (all optional — `resolveConfig` fills the rest). */
export interface RawConfig {
	/** Override the auto-detected Playnite data directory (`%APPDATA%\Playnite`). Point it at a
	 *  portable install, or at the interactive user's profile when the runner runs as a different user. */
	playniteDir?: string;
	sync?: Partial<SyncOptions>;
	filter?: Partial<FilterOptions>;
	art?: Partial<ArtOptions>;
	ui?: Partial<UiOptions>;
	/** Dev/acceptance flag: reconcile one hardcoded entry so the round-trip is observable. */
	devEntry?: boolean;
}

/** The fully-resolved config the engine consumes. */
export interface Config {
	playniteDir?: string;
	sync: SyncOptions;
	filter: FilterOptions;
	art: ArtOptions;
	ui: UiOptions;
	devEntry: boolean;
}

export const DEFAULT_SYNC: SyncOptions = {
	pollMinutes: 5,
	watch: true,
	debounceMs: 1500,
};

export const DEFAULT_FILTER: FilterOptions = {
	installedOnly: true,
	includeHidden: false,
	sources: [],
	excludeSources: [],
};

export const DEFAULT_ART: ArtOptions = {
	mode: "dataurl",
	maxBytes: 1_500_000,
	includeBackground: false,
};

export const DEFAULT_UI: UiOptions = {
	standalone: false,
	port: 47994,
	bind: "127.0.0.1",
};

/** Fill defaults over an authored config so the rest of the engine sees a total shape. */
export const resolveConfig = (raw: RawConfig): Config => ({
	playniteDir: raw.playniteDir?.trim() || undefined,
	sync: { ...DEFAULT_SYNC, ...raw.sync },
	filter: { ...DEFAULT_FILTER, ...raw.filter },
	art: { ...DEFAULT_ART, ...raw.art },
	ui: { ...DEFAULT_UI, ...raw.ui },
	devEntry: raw.devEntry ?? false,
});

/** The empty starting config for a fresh install. */
export const emptyConfig = (): Config => resolveConfig({});