import type { FastifyApp } from '@bytelyst/fastify-core';
import { BadRequestError, NotFoundError } from '@bytelyst/errors';
import { extractAuth, requireWriter } from '../../lib/auth.js';
import { PRODUCT_ID } from '../../lib/product-config.js';
import { trackEvent } from '../../lib/telemetry.js';
import { isFeatureEnabled } from '../../lib/feature-flags.js';
import { extractFromText } from '../../lib/extraction-client.js';
import * as repo from './repository.js';
import * as artifactRepo from '../note-artifacts/repository.js';
import { CreateNoteSchema, ListNotesQuerySchema, UpdateNoteSchema, type NoteDoc } from './types.js';

type RouteApp = Omit<FastifyApp, 'setReadyState' | 'isReadyState'>;

export async function noteRoutes(app: RouteApp) {
  app.get('/notes/search', async req => {
    if (!isFeatureEnabled('notes.enabled')) {
      throw new BadRequestError('Notes feature is currently disabled');
    }
    const auth = await extractAuth(req);
    const parsed = ListNotesQuerySchema.safeParse(req.query);
    if (!parsed.success) {
      throw new BadRequestError(parsed.error.issues.map((issue: { message: string }) => issue.message).join('; '));
    }

    const result = await repo.listNotes(auth.sub, PRODUCT_ID, parsed.data);
    return {
      query: parsed.data.search ?? null,
      ...result,
      limit: parsed.data.limit,
      offset: parsed.data.offset,
    };
  });

  app.get('/notes', async req => {
    const auth = await extractAuth(req);
    const parsed = ListNotesQuerySchema.safeParse(req.query);
    if (!parsed.success) {
      throw new BadRequestError(parsed.error.issues.map((issue: { message: string }) => issue.message).join('; '));
    }

    const result = await repo.listNotes(auth.sub, PRODUCT_ID, parsed.data);
    return { ...result, limit: parsed.data.limit, offset: parsed.data.offset };
  });

  app.get('/notes/:id', async req => {
    const auth = await extractAuth(req);
    const { id } = req.params as { id: string };
    const workspaceId = (req.query as { workspaceId?: string }).workspaceId;

    if (!workspaceId) {
      throw new BadRequestError('workspaceId is required');
    }

    const note = await repo.getNote(id, workspaceId);
    if (!note || note.userId !== auth.sub || note.productId !== PRODUCT_ID) {
      throw new NotFoundError('Note not found');
    }

    return note;
  });

  app.post('/notes', async (req, reply) => {
    const auth = await requireWriter(req);
    const parsed = CreateNoteSchema.safeParse(req.body);
    if (!parsed.success) {
      throw new BadRequestError(
        parsed.error.issues.map((issue: { message: string }) => issue.message).join('; ')
      );
    }

    const now = new Date().toISOString();
    const doc: NoteDoc = {
      id: parsed.data.id,
      productId: PRODUCT_ID,
      workspaceId: parsed.data.workspaceId,
      userId: auth.sub,
      title: parsed.data.title,
      body: parsed.data.body,
      status: 'draft',
      tags: parsed.data.tags,
      links: parsed.data.links,
      sourceType: parsed.data.sourceType,
      sourceUri: parsed.data.sourceUri,
      createdAt: now,
      updatedAt: now,
      createdBy: auth.sub,
      updatedBy: auth.sub,
      agentId: parsed.data.agentId,
    };

    const created = await repo.createNote(doc);
    trackEvent({ event: 'note.created', userId: auth.sub, properties: { noteId: created.id, workspaceId: created.workspaceId } });
    reply.code(201);
    return created;
  });

  app.patch('/notes/:id', async req => {
    const auth = await requireWriter(req);
    const { id } = req.params as { id: string };
    const workspaceId = (req.query as { workspaceId?: string }).workspaceId;

    if (!workspaceId) {
      throw new BadRequestError('workspaceId is required');
    }

    const parsed = UpdateNoteSchema.safeParse(req.body);
    if (!parsed.success) {
      throw new BadRequestError(
        parsed.error.issues.map((issue: { message: string }) => issue.message).join('; ')
      );
    }

    const existing = await repo.getNote(id, workspaceId);
    if (!existing || existing.userId !== auth.sub || existing.productId !== PRODUCT_ID) {
      throw new NotFoundError('Note not found');
    }

    const updated = await repo.updateNote(id, workspaceId, {
      ...parsed.data,
      updatedAt: new Date().toISOString(),
      updatedBy: auth.sub,
    });

    if (!updated) {
      throw new NotFoundError('Note not found');
    }

    trackEvent({ event: 'note.updated', userId: auth.sub, properties: { noteId: id, workspaceId } });
    return updated;
  });

  app.post('/notes/:id/restore', async req => {
    const auth = await requireWriter(req);
    const { id } = req.params as { id: string };
    const workspaceId = (req.body as { workspaceId?: string } | undefined)?.workspaceId;

    if (!workspaceId) {
      throw new BadRequestError('workspaceId is required');
    }

    const existing = await repo.getNote(id, workspaceId);
    if (!existing || existing.userId !== auth.sub || existing.productId !== PRODUCT_ID) {
      throw new NotFoundError('Note not found');
    }

    const updated = await repo.updateNote(id, workspaceId, {
      status: 'active',
      updatedAt: new Date().toISOString(),
      updatedBy: auth.sub,
    });

    if (!updated) {
      throw new NotFoundError('Note not found');
    }

    return updated;
  });

  app.post('/notes/:id/archive', async req => {
    const auth = await requireWriter(req);
    const { id } = req.params as { id: string };
    const workspaceId = (req.body as { workspaceId?: string } | undefined)?.workspaceId;

    if (!workspaceId) {
      throw new BadRequestError('workspaceId is required');
    }

    const existing = await repo.getNote(id, workspaceId);
    if (!existing || existing.userId !== auth.sub || existing.productId !== PRODUCT_ID) {
      throw new NotFoundError('Note not found');
    }

    const updated = await repo.updateNote(id, workspaceId, {
      status: 'archived',
      updatedAt: new Date().toISOString(),
      updatedBy: auth.sub,
    });

    if (!updated) {
      throw new NotFoundError('Note not found');
    }

    trackEvent({ event: 'note.archived', userId: auth.sub, properties: { noteId: id, workspaceId } });
    return updated;
  });

  app.post('/notes/:id/summarize', async (req, reply) => {
    const auth = await requireWriter(req);
    const { id } = req.params as { id: string };
    const workspaceId = (req.body as { workspaceId?: string } | undefined)?.workspaceId;

    if (!workspaceId) {
      throw new BadRequestError('workspaceId is required');
    }

    const existing = await repo.getNote(id, workspaceId);
    if (!existing || existing.userId !== auth.sub || existing.productId !== PRODUCT_ID) {
      throw new NotFoundError('Note not found');
    }

    let summaryText: string;
    try {
      const result = await extractFromText(existing.body, 'summarization');
      summaryText = result.summary ?? 'No summary generated.';
    } catch {
      summaryText = `Auto-summary of: ${existing.title}. ${existing.body.slice(0, 200)}...`;
    }

    const now = new Date().toISOString();
    const artifact = await artifactRepo.createNoteArtifact({
      id: `summary-${id}-${Date.now()}`,
      productId: PRODUCT_ID,
      workspaceId,
      userId: auth.sub,
      noteId: id,
      artifactType: 'summary',
      title: `Summary of ${existing.title}`,
      description: summaryText,
      createdAt: now,
      createdBy: auth.sub,
      updatedAt: now,
      updatedBy: auth.sub,
    });

    reply.code(201);
    return artifact;
  });

  app.get('/notes/export', async (req, reply) => {
    const auth = await extractAuth(req);
    const query = req.query as { format?: string; workspaceId?: string };
    const format = query.format ?? 'json';

    if (format !== 'json' && format !== 'markdown') {
      throw new BadRequestError('format must be json or markdown');
    }

    const listQuery = { workspaceId: query.workspaceId, limit: 100, offset: 0 };
    const result = await repo.listNotes(auth.sub, PRODUCT_ID, listQuery);

    if (format === 'markdown') {
      const md = result.items
        .map((n: NoteDoc) => `# ${n.title}\n\n${n.body}\n\n---\n`)
        .join('\n');
      reply.header('Content-Type', 'text/markdown');
      reply.header('Content-Disposition', 'attachment; filename="notes-export.md"');
      return md;
    }

    reply.header('Content-Type', 'application/json');
    reply.header('Content-Disposition', 'attachment; filename="notes-export.json"');
    return { exportedAt: new Date().toISOString(), notes: result.items };
  });

  app.delete('/notes/:id', async (req, reply) => {
    const auth = await requireWriter(req);
    const { id } = req.params as { id: string };
    const workspaceId = (req.query as { workspaceId?: string }).workspaceId;

    if (!workspaceId) {
      throw new BadRequestError('workspaceId is required');
    }

    const existing = await repo.getNote(id, workspaceId);
    if (!existing || existing.userId !== auth.sub || existing.productId !== PRODUCT_ID) {
      throw new NotFoundError('Note not found');
    }

    await repo.deleteNote(id, workspaceId);
    reply.code(204).send();
  });
}