/**
 * rSchedule Local-First Client
 *
 * Wraps the shared local-first stack for collaborative schedule management.
 * Jobs, reminders, workflows, and execution logs sync in real-time.
 */

import { DocumentManager } from '../../shared/local-first/document';
import type { DocumentId } from '../../shared/local-first/document';
import { EncryptedDocStore } from '../../shared/local-first/storage';
import { DocSyncManager } from '../../shared/local-first/sync';
import { DocCrypto } from '../../shared/local-first/crypto';
import { scheduleSchema, scheduleDocId, MAX_LOG_ENTRIES } from './schemas';
import type { ScheduleDoc, ScheduleJob, Reminder, Workflow, ExecutionLogEntry } from './schemas';

export class ScheduleLocalFirstClient {
	#space: string;
	#documents: DocumentManager;
	#store: EncryptedDocStore;
	#sync: DocSyncManager;
	#initialized = false;

	constructor(space: string, docCrypto?: DocCrypto) {
		this.#space = space;
		this.#documents = new DocumentManager();
		this.#store = new EncryptedDocStore(space, docCrypto);
		this.#sync = new DocSyncManager({
			documents: this.#documents,
			store: this.#store,
		});
		this.#documents.registerSchema(scheduleSchema);
	}

	get isConnected(): boolean { return this.#sync.isConnected; }

	async init(): Promise<void> {
		if (this.#initialized) return;
		await this.#store.open();
		const cachedIds = await this.#store.listByModule('schedule', 'jobs');
		const cached = await this.#store.loadMany(cachedIds);
		for (const [docId, binary] of cached) {
			this.#documents.open<ScheduleDoc>(docId, scheduleSchema, binary);
		}
		await this.#sync.preloadSyncStates(cachedIds);
		const proto = location.protocol === 'https:' ? 'wss:' : 'ws:';
		const wsUrl = `${proto}//${location.host}/ws/${this.#space}`;
		try { await this.#sync.connect(wsUrl, this.#space); } catch { console.warn('[ScheduleClient] Working offline'); }
		this.#initialized = true;
	}

	async subscribe(): Promise<ScheduleDoc | null> {
		const docId = scheduleDocId(this.#space) as DocumentId;
		let doc = this.#documents.get<ScheduleDoc>(docId);
		if (!doc) {
			const binary = await this.#store.load(docId);
			doc = binary
				? this.#documents.open<ScheduleDoc>(docId, scheduleSchema, binary)
				: this.#documents.open<ScheduleDoc>(docId, scheduleSchema);
		}
		await this.#sync.subscribe([docId]);
		return doc ?? null;
	}

	getDoc(): ScheduleDoc | undefined {
		return this.#documents.get<ScheduleDoc>(scheduleDocId(this.#space) as DocumentId);
	}

	onChange(cb: (doc: ScheduleDoc) => void): () => void {
		return this.#sync.onChange(scheduleDocId(this.#space) as DocumentId, cb as (doc: any) => void);
	}

	onConnect(cb: () => void): () => void { return this.#sync.onConnect(cb); }

	// ── Job CRUD ──

	saveJob(job: ScheduleJob): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Save job ${job.name}`, (d) => {
			d.jobs[job.id] = job;
		});
	}

	deleteJob(jobId: string): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Delete job`, (d) => {
			delete d.jobs[jobId];
		});
	}

	toggleJob(jobId: string, enabled: boolean): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Toggle job`, (d) => {
			if (d.jobs[jobId]) {
				d.jobs[jobId].enabled = enabled;
				d.jobs[jobId].updatedAt = Date.now();
			}
		});
	}

	// ── Reminder CRUD ──

	saveReminder(reminder: Reminder): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Save reminder ${reminder.title}`, (d) => {
			d.reminders[reminder.id] = reminder;
		});
	}

	deleteReminder(reminderId: string): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Delete reminder`, (d) => {
			delete d.reminders[reminderId];
		});
	}

	completeReminder(reminderId: string): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Complete reminder`, (d) => {
			if (d.reminders[reminderId]) {
				d.reminders[reminderId].completed = true;
				d.reminders[reminderId].updatedAt = Date.now();
			}
		});
	}

	// ── Workflow CRUD ──

	saveWorkflow(workflow: Workflow): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Save workflow ${workflow.name}`, (d) => {
			d.workflows[workflow.id] = workflow;
		});
	}

	deleteWorkflow(workflowId: string): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Delete workflow`, (d) => {
			delete d.workflows[workflowId];
		});
	}

	// ── Execution Log ──

	appendLogEntry(entry: ExecutionLogEntry): void {
		const docId = scheduleDocId(this.#space) as DocumentId;
		this.#sync.change<ScheduleDoc>(docId, `Log execution`, (d) => {
			if (!d.log) d.log = [] as any;
			d.log.push(entry);
			// Trim to keep doc size manageable
			while (d.log.length > MAX_LOG_ENTRIES) d.log.splice(0, 1);
		});
	}

	async disconnect(): Promise<void> {
		await this.#sync.flush();
		this.#sync.disconnect();
	}
}