/** Parsed and normalised ```gtd-calendar config. */
export interface CalendarConfig {
	view: "day" | "week" | "month" | "month-grid";
	title: string | null;
	/** Folder recursion depth: 0 = this folder only, Infinity = all children. */
	scopeDepth: number;
	/**
	 * `scope: all` — scan every notebook in the profile, ignoring the root
	 * folder entirely. When true, `scopeDepth` and `notebook` are irrelevant.
	 */
	scopeAll: boolean;
	/**
	 * Notebook to root the folder scan at (id, title, or Parent/Child path).
	 * null = the host note's own folder. `scopeDepth` applies relative to it.
	 * Ignored when `scopeAll` is true.
	 */
	notebook: string | null;
	/** Notebook roots whose complete descendant trees are removed from scope. */
	excludeNotebooks: string[];
	notes: InclusionMode;
	todos: InclusionMode;
	sort: "asc" | "desc";
	sortType: "title" | "modified_date";
	/** Whether to show the Unscheduled to-dos / notes sub-sections. */
	unscheduledTodos: boolean;
	unscheduledNotes: boolean;
	/** Non-fatal problems found while parsing, surfaced in the UI. */
	warnings: string[];
}

export type InclusionMode = "gtd-only" | "all" | "none";

/** A note/todo as fetched from the Joplin data API. */
export interface RawNote {
	id: string;
	title: string;
	parent_id: string;
	is_todo: number;
	todo_due: number;
	todo_completed: number;
	updated_time: number;
	/**
	 * Note body. Only fetched when the caller asks for it via
	 * `getNotesInFolder(folderId, true)`; undefined otherwise. Collectors only
	 * omit the body when their inclusion mode means the gtd block is never
	 * scanned, so callers must never read this in a body-less path.
	 */
	body?: string;
}

/** Properties parsed from a ```gtd block. */
export interface GtdBlock {
	date: string | null;
	bgColour: string | null;
	fgColour: string | null;
	icon: string | null;
	title: string | null;
	text: string | null;
}

export interface GtdBlockResult {
	found: boolean;
	block: GtdBlock | null;
	error: string | null;
}

/** Event payload sent to the webview. */
export interface GtdEvent {
	id: string;
	title: string;
	/** ISO yyyy-mm-dd, or null for unscheduled. */
	date: string | null;
	isTodo: boolean;
	completed: boolean;
	bgColour: string | null;
	fgColour: string | null;
	icon: string | null;
	text: string | null;
	updatedTime: number;
	/** True when the to-do carries the recurrence index tag (see RECURRING_TAG). */
	isRecurring: boolean;
}

export interface RawFolder {
	id: string;
	parent_id: string;
	/**
	 * Notebook title. Needed only to resolve the `notebook:` option by
	 * name/path (folder scoping uses id/parent_id alone), so it is optional for
	 * the benefit of scope-only test fixtures; the real adapter always sets it.
	 */
	title?: string;
}

/** Thin abstraction over the Joplin data API so collectEvents is testable. */
export interface DataAdapter {
	getFolders(): Promise<RawFolder[]>;
	/**
	 * Notes in a folder. `includeBody` is a fetch hint: when false, the adapter
	 * may omit the (potentially large) `body` field. Collectors pass false only
	 * when their inclusion mode guarantees the gtd block is never scanned.
	 */
	getNotesInFolder(folderId: string, includeBody: boolean): Promise<RawNote[]>;
	/** Lowercased tag titles for a note. Used to detect recurrence. */
	getNoteTagTitles(noteId: string): Promise<string[]>;
}

export interface RawTag {
	id: string;
	title: string;
}

/** Narrow writable Joplin boundary used only by validated workflow moves. */
export interface MutationAdapter {
	getNote(noteId: string): Promise<RawNote | null>;
	getNoteTags(noteId: string): Promise<RawTag[]>;
	getAllTags(): Promise<RawTag[]>;
	createTag(title: string): Promise<RawTag>;
	attachTag(tagId: string, noteId: string): Promise<void>;
	detachTag(tagId: string, noteId: string): Promise<void>;
	setTodoCompleted(noteId: string, completedTime: number): Promise<void>;
}

/**
 * Tag maintained by the "Repeating To-Dos" plugin family as a query index
 * for recurring to-dos. We treat its presence as the recurrence signal.
 * Kept as a constant so a future `recurring-tag:` config option (or a
 * switch to a different recurrence plugin) is a one-line change.
 */
export const RECURRING_TAG = "recurring";

/**
 * Default tag that places a to-do in the kanban "In Progress" column.
 * Overridable via the gtd-kanban `in-progress-tag:` option. Constant
 * mirrors RECURRING_TAG.
 */
export const IN_PROGRESS_TAG = "in-progress";

/** Default tag that marks an opted-in ordinary note complete. */
export const DONE_TAG = "done";

export type KanbanSortType = "due-date" | "title" | "modified-date";
/** Ordinary-note inclusion for kanban/matrix; notes still require a gtd block. */
export type NoteInclusionMode = "all" | "none";

/** Parsed and normalised ```gtd-kanban config. */
export interface KanbanConfig {
	title: string | null;
	scopeDepth: number;
	/** `scope: all` — scan every notebook; ignores scopeDepth and notebook. */
	scopeAll: boolean;
	/** Separate exact-owner notebook views; requires children + notebook grouping. */
	groupByNotebook: boolean;
	/** Notebook to root the scan at (id/title/path); null = host folder. */
	notebook: string | null;
	/** Notebook roots whose complete descendant trees are removed from scope. */
	excludeNotebooks: string[];
	notes: NoteInclusionMode;
	todos: InclusionMode;
	sortType: KanbanSortType;
	sort: "asc" | "desc";
	inProgressTag: string;
	/** Tag that marks an opted-in ordinary note complete. */
	doneTag: string;
	cardDetail: "hover" | "always" | "none";
	/** Cards initially shown, and revealed per "List more" action. */
	pageSize: number;
	/** Whether this board explicitly opts in to persisted workflow moves. */
	editable: boolean;
	/** Days; Infinity means "all". */
	doneWindow: number;
	warnings: string[];
}

/** Fixed semantic destinations accepted from an editable kanban webview. */
export type KanbanDestination = "backlog" | "inProgress" | "done";

/** Constrained intent sent by the webview; the main process derives all writes. */
export interface MoveKanbanCardIntent {
	type: "moveKanbanCard";
	view: "kanban";
	hostNoteId: string;
	cardId: string;
	destination: KanbanDestination;
	rawConfig: string;
	viewInstanceId: string;
}

export type MoveCardResult =
	| { status: "success"; viewInstanceId: string; changed: boolean }
	| { status: "stale"; viewInstanceId: string; message: string }
	| { status: "error"; viewInstanceId: string; message: string };

/** A note or to-do rendered as a kanban/matrix card. */
export interface KanbanCard {
	id: string;
	title: string;
	date: string | null;
	isTodo: boolean;
	completed: boolean;
	completedTime: number;
	isRecurring: boolean;
	bgColour: string | null;
	fgColour: string | null;
	icon: string | null;
	text: string | null;
	updatedTime: number;
}

export interface KanbanBoard {
	backlog: KanbanCard[];
	inProgress: KanbanCard[];
	done: KanbanCard[];
}

/** Identity shared by every exact-owner notebook view. */
export interface NotebookViewMetadata {
	folderId: string;
	notebookPath: string;
	cardCount: number;
	warnings: string[];
}

export interface NotebookKanbanGroup extends NotebookViewMetadata {
	board: KanbanBoard;
}

export type KanbanLayout =
	| { kind: "single"; board: KanbanBoard }
	| { kind: "notebooks"; groups: NotebookKanbanGroup[] };

/**
 * Default tags for the Eisenhower matrix axes. Overridable via the
 * gtd-matrix `urgent-tag:` / `important-tag:` options.
 */
export const URGENT_TAG = "urgent";
export const IMPORTANT_TAG = "important";

export type MatrixMode = "skeleton" | "eisenhower";

/** Parsed and normalised ```gtd-matrix config. */
export interface MatrixConfig {
	mode: MatrixMode;
	title: string | null;
	scopeDepth: number;
	/** `scope: all` — scan every notebook; ignores scopeDepth and notebook. */
	scopeAll: boolean;
	/** Separate exact-owner notebook views; requires children + notebook grouping. */
	groupByNotebook: boolean;
	/** Notebook to root the scan at (id/title/path); null = host folder. */
	notebook: string | null;
	/** Notebook roots whose complete descendant trees are removed from scope. */
	excludeNotebooks: string[];
	notes: NoteInclusionMode;
	todos: InclusionMode;
	sortType: KanbanSortType;
	sort: "asc" | "desc";
	urgentTag: string;
	importantTag: string;
	/** Skeleton mode: tag marking active work (shared with the kanban). */
	inProgressTag: string;
	/** Tag that marks an opted-in ordinary note complete. */
	doneTag: string;
	/** Skeleton mode: days ahead within which a due date counts as "due soon". */
	urgentWindow: number;
	cardDetail: "hover" | "always" | "none";
	/** Cards initially shown, and revealed per "List more" action. */
	pageSize: number;
	/** Effective editable state; only valid for distinct-axis Eisenhower mode. */
	editable: boolean;
	warnings: string[];
}

export type MatrixDestination =
	| "topLeft"
	| "topRight"
	| "bottomLeft"
	| "bottomRight";

export interface MoveMatrixCardIntent {
	type: "moveMatrixCard";
	view: "matrix";
	hostNoteId: string;
	cardId: string;
	destination: MatrixDestination;
	rawConfig: string;
	viewInstanceId: string;
}

/**
 * The four matrix quadrants, positional (row x column):
 *   topLeft     topRight
 *   bottomLeft  bottomRight
 *
 * Both modes display Do Next / Scheduled / On Deck / Backlog; their axes and
 * bucketing semantics remain mode-specific.
 */
export interface MatrixBoard {
	topLeft: KanbanCard[];
	topRight: KanbanCard[];
	bottomLeft: KanbanCard[];
	bottomRight: KanbanCard[];
}

export interface NotebookMatrixGroup extends NotebookViewMetadata {
	board: MatrixBoard;
}

export type MatrixLayout =
	| { kind: "single"; board: MatrixBoard }
	| { kind: "notebooks"; groups: NotebookMatrixGroup[] };

/** Display labels for a matrix mode, sent to the webview. */
export interface MatrixLabels {
	columns: [string, string];
	rows: [string, string];
	quadrants: {
		topLeft: string;
		topRight: string;
		bottomLeft: string;
		bottomRight: string;
	};
}

// ---------------------------------------------------------------------------
// Gantt (SLICE4 data layer)
// ---------------------------------------------------------------------------

export type GanttSortType = "begin-date" | "title" | "modified-date";

/**
 * Parsed properties of an item `gtd-gantt` block (one carrying a `project:`
 * key). Notes become bars (begin/end), to-dos become milestones (the to-do's
 * native due date; begin/end on a to-do are ignored with a warning).
 */
export interface GanttItemBlock {
	/** Non-null marks this as an ITEM block; null/absent means a CHART block. */
	project: string | null;
	beginDate: string | null;
	endDate: string | null;
	bgColour: string | null;
	fgColour: string | null;
	title: string | null;
	text: string | null;
}

export interface GanttBlockResult {
	found: boolean;
	block: GanttItemBlock | null;
	error: string | null;
}

/** Parsed and normalised CHART `gtd-gantt` config (no `project:` key). */
export interface GanttConfig {
	title: string | null;
	scopeDepth: number;
	scopeAll: boolean;
	notebook: string | null;
	/** Limit the chart to a single project (case-insensitive); null = all. */
	filterProject: string | null;
	sortType: GanttSortType;
	sort: "asc" | "desc";
	cardDetail: "hover" | "always" | "none";
	warnings: string[];
}

/** A note rendered as a gantt bar (a dated span). */
export interface GanttBar {
	id: string;
	title: string;
	/** yyyy-mm-dd, inclusive. */
	beginDate: string;
	endDate: string;
	bgColour: string | null;
	fgColour: string | null;
	text: string | null;
	updatedTime: number;
}

/** A to-do rendered as a gantt milestone (a single dated point). */
export interface GanttMilestone {
	id: string;
	title: string;
	/** yyyy-mm-dd (the to-do's due date). */
	date: string;
	completed: boolean;
	isRecurring: boolean;
	bgColour: string | null;
	fgColour: string | null;
	text: string | null;
	updatedTime: number;
}

/** One swimlane: all bars + milestones sharing a `project:`. */
export interface GanttProject {
	name: string;
	bars: GanttBar[];
	milestones: GanttMilestone[];
}

/** Full gantt payload: projects plus the overall date envelope. */
export interface GanttChart {
	projects: GanttProject[];
	/** Earliest/latest dates across all items; null when the chart is empty. */
	rangeStart: string | null;
	rangeEnd: string | null;
	warnings: string[];
	scannedFolders: number;
	scannedNotes: number;
	itemCount: number;
}