import type { SupabaseClient } from '@supabase/supabase-js';
import type { Database, Document } from '$lib/supabase/types';
import { createLogger } from '$lib/utils/logger';

const log = createLogger('api.documents');

export async function fetchDocuments(
	supabase: SupabaseClient<Database>,
	orgId: string
): Promise<Document[]> {
	const { data, error } = await supabase
		.from('documents')
		.select('*')
		.eq('org_id', orgId)
		.order('type', { ascending: false }) // folders first
		.order('name');

	if (error) {
		log.error('fetchDocuments failed', { error, data: { orgId } });
		throw error;
	}
	log.debug('fetchDocuments ok', { data: { count: data?.length ?? 0 } });
	return data ?? [];
}

export async function createDocument(
	supabase: SupabaseClient<Database>,
	orgId: string,
	name: string,
	type: 'folder' | 'document' | 'kanban',
	parentId: string | null = null,
	userId: string,
	options?: { id?: string; content?: import('$lib/supabase/types').Json }
): Promise<Document> {
	let content: import('$lib/supabase/types').Json | null = options?.content ?? null;
	if (!content && type === 'document') {
		content = { type: 'doc', content: [] };
	}

	const { data, error } = await supabase
		.from('documents')
		.insert({
			...(options?.id ? { id: options.id } : {}),
			org_id: orgId,
			name,
			type,
			parent_id: parentId,
			created_by: userId,
			content,
		})
		.select()
		.single();

	if (error) {
		log.error('createDocument failed', { error, data: { orgId, name, type, parentId } });
		throw error;
	}
	log.info('createDocument ok', { data: { id: data.id, name, type } });
	return data;
}

export async function updateDocument(
	supabase: SupabaseClient<Database>,
	id: string,
	updates: Partial<Pick<Document, 'name' | 'content' | 'parent_id'>>
): Promise<Document> {
	const { data, error } = await supabase
		.from('documents')
		.update({ ...updates, updated_at: new Date().toISOString() })
		.eq('id', id)
		.select()
		.single();

	if (error) {
		log.error('updateDocument failed', { error, data: { id, updates } });
		throw error;
	}
	return data;
}

export async function deleteDocument(
	supabase: SupabaseClient<Database>,
	id: string
): Promise<void> {
	const { error } = await supabase.from('documents').delete().eq('id', id);
	if (error) {
		log.error('deleteDocument failed', { error, data: { id } });
		throw error;
	}
}

export async function moveDocument(
	supabase: SupabaseClient<Database>,
	id: string,
	newParentId: string | null
): Promise<void> {
	const { error } = await supabase
		.from('documents')
		.update({ parent_id: newParentId, updated_at: new Date().toISOString() })
		.eq('id', id);

	if (error) {
		log.error('moveDocument failed', { error, data: { id, newParentId } });
		throw error;
	}
}


export async function copyDocument(
	supabase: SupabaseClient<Database>,
	doc: Pick<Document, 'name' | 'type' | 'parent_id' | 'content'>,
	orgId: string,
	userId: string
): Promise<Document> {
	const { data, error } = await supabase
		.from('documents')
		.insert({
			org_id: orgId,
			name: `${doc.name} (copy)`,
			type: doc.type,
			parent_id: doc.parent_id,
			created_by: userId,
			content: doc.content,
		})
		.select()
		.single();

	if (error) {
		log.error('copyDocument failed', { error, data: { orgId, name: doc.name } });
		throw error;
	}
	log.info('copyDocument ok', { data: { id: data.id, name: data.name } });
	return data;
}

export function subscribeToDocuments(
	supabase: SupabaseClient<Database>,
	orgId: string,
	onInsert: (doc: Document) => void,
	onUpdate: (doc: Document) => void,
	onDelete: (id: string) => void
) {
	return supabase
		.channel(`documents:${orgId}`)
		.on(
			'postgres_changes',
			{ event: 'INSERT', schema: 'public', table: 'documents', filter: `org_id=eq.${orgId}` },
			(payload) => onInsert(payload.new as Document)
		)
		.on(
			'postgres_changes',
			{ event: 'UPDATE', schema: 'public', table: 'documents', filter: `org_id=eq.${orgId}` },
			(payload) => onUpdate(payload.new as Document)
		)
		.on(
			'postgres_changes',
			{ event: 'DELETE', schema: 'public', table: 'documents', filter: `org_id=eq.${orgId}` },
			(payload) => onDelete((payload.old as { id: string }).id)
		)
		.subscribe();
}