import type { FastifyInstance, FastifyRequest } from 'fastify';
import type { AppConfig } from './config.js';
import type { RequestContext } from './core/context.js';
import { newUlid, parseUlid } from './core/ids.js';
import type { IdentityPort } from './core/ports.js';
import { PlatformIdentityAdapter, StandaloneIdentityAdapter } from './adapters/identity.js';
import type { Database } from './infrastructure/database.js';
import { reconcileWorkSession } from './domain/attendance/work-session.js';

const datePattern = /^\d{4}-\d{2}-\d{2}$/;

interface AttendanceBody {
  event_id?: string;
  employee_id: string;
  event_type: 'check_in' | 'check_out';
  occurred_at: string;
  source_event_id: string;
  device_id?: string;
  org_unit_id?: string;
}

interface TimesheetBody {
  minutes_worked: number;
  status: 'draft' | 'submitted' | 'approved' | 'rejected';
  note?: string;
}

interface EmployeeBody {
  personnel_number: string;
  display_name: string;
  position?: string;
  gender?: 'male' | 'female' | '';
}

interface EmployeePatchBody {
  personnel_number?: string;
  display_name?: string;
  position?: string;
  gender?: 'male' | 'female' | '';
  status?: 'active' | 'blocked' | 'dismissed';
}

interface ReconcileSessionsBody {
  date_from: string;
  date_to: string;
  business_day_start_hour?: number;
  automatic_close_hour?: number;
  open_shift_threshold_minutes?: number;
}

interface ConfirmSessionBody {
  status: 'confirmed' | 'rejected';
  worked_minutes?: number;
  started_at?: string | null;
  ended_at?: string | null;
  correction_note?: string;
}

interface SessionBody {
  access_token: string;
}

const sessionCookieName = '__Host-krona_staff_session';
const sessionMaxAgeSeconds = 8 * 60 * 60;

export async function registerPortalRoutes(
  api: FastifyInstance,
  config: AppConfig,
  database: Database,
) {
  const identity: IdentityPort = config.STAFF_RUNTIME_MODE === 'platform'
    ? new PlatformIdentityAdapter()
    : new StandaloneIdentityAdapter(config);

  api.post<{ Body: SessionBody }>('/session', {
    schema: {
      body: {
        type: 'object', additionalProperties: false,
        required: ['access_token'],
        properties: { access_token: { type: 'string', minLength: 32, maxLength: 4096 } },
      },
    },
  }, async (request, reply) => {
    assertSameOrigin(request);
    if (config.STAFF_RUNTIME_MODE === 'standalone' && !config.STANDALONE_MANAGER_TOKEN) {
      return reply.serviceUnavailable('Вход администратора ещё не настроен.');
    }
    const context = await resolveToken(identity, request.body.access_token, request);
    if (!context.permissions.has('staff:attendance:manage')) {
      return reply.forbidden('Для входа требуется ключ администратора.');
    }
    reply
      .header('cache-control', 'no-store')
      .header('set-cookie', serializeSessionCookie(request.body.access_token, sessionMaxAgeSeconds));
    return { role: 'manager', expires_in: sessionMaxAgeSeconds };
  });

  api.delete('/session', async (request, reply) => {
    assertSameOrigin(request);
    reply
      .header('cache-control', 'no-store')
      .header('set-cookie', serializeSessionCookie('', 0));
    return reply.code(204).send();
  });

  api.get('/portal', async (request, reply) => {
    reply.header('cache-control', 'no-store');
    const context = await resolveContext(identity, request);
    const canManage = context.permissions.has('staff:attendance:manage');
    if (!canManage && !context.permissions.has('staff:attendance:read_own')) {
      return reply.forbidden('Недостаточно прав для просмотра посещаемости.');
    }

    return database.tenantTransaction(context.tenantId, context.actorId, async (client) => {
      const employees = await client.query(
        `SELECT e.id, e.core_user_id, e.personnel_number, e.display_name, e.position, e.gender, e.status
         FROM staff_employees e
         WHERE e.status <> 'dismissed' AND ($1::boolean OR e.core_user_id = $2)
         ORDER BY e.display_name`,
        [canManage, context.actorId],
      );
      const attendance = await client.query(
        `SELECT a.id, a.employee_id, e.display_name, a.event_type, a.source,
                a.occurred_at, a.received_at, a.status
         FROM staff_attendance_events a
         JOIN staff_employees e ON e.tenant_id = a.tenant_id AND e.id = a.employee_id
         WHERE ($1::boolean OR e.core_user_id = $2)
         ORDER BY a.occurred_at DESC LIMIT 100`,
        [canManage, context.actorId],
      );
      const timesheet = await client.query(
        `SELECT t.id, t.employee_id, e.display_name, t.work_date, t.minutes_worked,
                t.status, t.note, t.revision, t.updated_at
         FROM staff_timesheet_entries t
         JOIN staff_employees e ON e.tenant_id = t.tenant_id AND e.id = t.employee_id
         WHERE t.work_date >= (CURRENT_DATE - INTERVAL '40 days')
           AND ($1::boolean OR e.core_user_id = $2)
         ORDER BY t.work_date DESC, e.display_name`,
        [canManage, context.actorId],
      );
      const workSessions = await client.query(
        `SELECT s.id, s.employee_id, e.display_name, s.org_unit_id, u.name AS org_unit_name,
                s.business_date, s.started_at, s.ended_at, s.worked_minutes, s.status,
                s.anomaly, s.correction_note, s.auto_closed, s.revision
         FROM staff_work_sessions s
         JOIN staff_employees e ON e.tenant_id = s.tenant_id AND e.id = s.employee_id
         JOIN staff_org_units u ON u.tenant_id = s.tenant_id AND u.id = s.org_unit_id
         WHERE s.business_date >= (CURRENT_DATE - INTERVAL '40 days')
           AND ($1::boolean OR e.core_user_id = $2)
         ORDER BY s.business_date DESC, e.display_name`,
        [canManage, context.actorId],
      );
      return {
        viewer: { actor_id: context.actorId, role: canManage ? 'manager' : 'employee' },
        employees: employees.rows,
        attendance: attendance.rows,
        timesheet: timesheet.rows,
        work_sessions: workSessions.rows,
        refreshed_at: new Date().toISOString(),
      };
    });
  });

  api.post<{ Body: EmployeeBody }>('/employees', {
    schema: {
      body: {
        type: 'object', additionalProperties: false,
        required: ['personnel_number', 'display_name'],
        properties: {
          personnel_number: { type: 'string', minLength: 1, maxLength: 80 },
          display_name: { type: 'string', minLength: 1, maxLength: 240 },
          position: { type: 'string', maxLength: 160 },
          gender: { enum: ['', 'male', 'female'] },
        },
      },
    },
  }, async (request, reply) => {
    assertCookieMutationOrigin(request);
    const context = await requirePermission(identity, request, 'staff:employee:write');
    const employeeId = newUlid();
    const personnelNumber = request.body.personnel_number.trim();
    const displayName = request.body.display_name.trim();
    if (!personnelNumber || !displayName) return reply.badRequest('Табельный номер и имя обязательны.');

    const employee = await database.tenantTransaction(context.tenantId, context.actorId, async (client) => {
      const saved = await client.query(
        `INSERT INTO staff_employees
           (id, tenant_id, personnel_number, display_name, position, gender, status)
         VALUES ($1, $2, $3, $4, $5, $6, 'active')
         ON CONFLICT (tenant_id, personnel_number) DO NOTHING
         RETURNING id, core_user_id, personnel_number, display_name, position, gender, status`,
        [employeeId, context.tenantId, personnelNumber, displayName,
          request.body.position?.trim() ?? '', request.body.gender ?? ''],
      );
      if (saved.rowCount === 0) return null;
      const result = saved.rows[0] as Record<string, unknown>;
      await client.query(
        `INSERT INTO staff_audit_log
           (id, tenant_id, actor_id, action, entity_type, entity_id, new_values, correlation_id)
         VALUES ($1, $2, $3, 'employee.created', 'Employee', $4, $5, $6)`,
        [newUlid(), context.tenantId, context.actorId, employeeId, result, context.correlationId],
      );
      return result;
    });
    if (!employee) return reply.conflict('Сотрудник с таким табельным номером уже существует.');
    return reply.code(201).send(employee);
  });

  api.patch<{ Params: { employeeId: string }; Body: EmployeePatchBody }>('/employees/:employeeId', {
    schema: {
      params: { type: 'object', required: ['employeeId'], properties: {
        employeeId: { type: 'string', pattern: '^[0-9A-HJKMNP-TV-Z]{26}$' },
      } },
      body: {
        type: 'object', additionalProperties: false, minProperties: 1,
        properties: {
          personnel_number: { type: 'string', minLength: 1, maxLength: 80 },
          display_name: { type: 'string', minLength: 1, maxLength: 240 },
          position: { type: 'string', maxLength: 160 },
          gender: { enum: ['', 'male', 'female'] },
          status: { enum: ['active', 'blocked', 'dismissed'] },
        },
      },
    },
  }, async (request, reply) => {
    assertCookieMutationOrigin(request);
    const context = await requirePermission(identity, request, 'staff:employee:write');
    const employeeId = parseUlid(request.params.employeeId);
    const personnelNumber = request.body.personnel_number?.trim();
    const displayName = request.body.display_name?.trim();
    if (personnelNumber === '' || displayName === '') return reply.badRequest('Табельный номер и имя не могут быть пустыми.');

    const outcome = await database.tenantTransaction(context.tenantId, context.actorId, async (client) => {
      const current = await client.query(
        `SELECT id, core_user_id, personnel_number, display_name, position, gender, status
         FROM staff_employees WHERE tenant_id = $1 AND id = $2 FOR UPDATE`,
        [context.tenantId, employeeId],
      );
      if (current.rowCount === 0) return { kind: 'missing' as const };
      if (personnelNumber) {
        const duplicate = await client.query(
          `SELECT id FROM staff_employees
           WHERE tenant_id = $1 AND personnel_number = $2 AND id <> $3 LIMIT 1`,
          [context.tenantId, personnelNumber, employeeId],
        );
        if ((duplicate.rowCount ?? 0) > 0) return { kind: 'conflict' as const };
      }
      const saved = await client.query(
        `UPDATE staff_employees SET
           personnel_number = COALESCE($3, personnel_number),
           display_name = COALESCE($4, display_name),
           position = COALESCE($5, position),
           gender = COALESCE($6, gender),
           status = COALESCE($7, status),
           updated_at = now()
         WHERE tenant_id = $1 AND id = $2
         RETURNING id, core_user_id, personnel_number, display_name, position, gender, status`,
        [context.tenantId, employeeId, personnelNumber, displayName,
          request.body.position?.trim(), request.body.gender, request.body.status],
      );
      const result = saved.rows[0] as Record<string, unknown>;
      await client.query(
        `INSERT INTO staff_audit_log
           (id, tenant_id, actor_id, action, entity_type, entity_id,
            old_values, new_values, correlation_id)
         VALUES ($1, $2, $3, 'employee.updated', 'Employee', $4, $5, $6, $7)`,
        [newUlid(), context.tenantId, context.actorId, employeeId,
          current.rows[0], result, context.correlationId],
      );
      return { kind: 'saved' as const, employee: result };
    });
    if (outcome.kind === 'missing') return reply.notFound('Сотрудник не найден.');
    if (outcome.kind === 'conflict') {
      return reply.conflict('Сотрудник с таким табельным номером уже существует.');
    }
    return reply.send(outcome.employee);
  });

  api.post<{ Body: AttendanceBody }>('/attendance/events', {
    schema: {
      body: {
        type: 'object', additionalProperties: false,
        required: ['employee_id', 'event_type', 'occurred_at', 'source_event_id'],
        properties: {
          event_id: { type: 'string', pattern: '^[0-9A-HJKMNP-TV-Z]{26}$' },
          employee_id: { type: 'string', pattern: '^[0-9A-HJKMNP-TV-Z]{26}$' },
          event_type: { enum: ['check_in', 'check_out'] },
          occurred_at: { type: 'string', format: 'date-time' },
          source_event_id: { type: 'string', minLength: 1, maxLength: 200 },
          device_id: { type: 'string', pattern: '^[0-9A-HJKMNP-TV-Z]{26}$' },
          org_unit_id: { type: 'string', pattern: '^[0-9A-HJKMNP-TV-Z]{26}$' },
        },
      },
    },
  }, async (request, reply) => {
    const context = await requirePermission(identity, request, 'staff:attendance:clock');
    const eventId = request.body.event_id ? parseUlid(request.body.event_id) : newUlid();
    const employeeId = parseUlid(request.body.employee_id);
    const deviceId = request.body.device_id ? parseUlid(request.body.device_id) : null;
    const orgUnitId = request.body.org_unit_id ? parseUlid(request.body.org_unit_id) : null;
    const occurredAt = new Date(request.body.occurred_at);
    if (Number.isNaN(occurredAt.valueOf())) return reply.badRequest('Некорректное время отметки.');
    const now = Date.now();
    if (occurredAt.valueOf() > now + 5 * 60_000 || occurredAt.valueOf() < now - 180 * 86_400_000) {
      return reply.badRequest('Время отметки выходит за допустимый период пилота.');
    }

    const result = await database.tenantTransaction(context.tenantId, context.actorId, async (client) => {
      await client.query(
        `INSERT INTO staff_employees
           (id, tenant_id, personnel_number, display_name, position, gender, status)
         VALUES ($1, $2, $3, $4, '', '', 'active')
         ON CONFLICT (id) DO NOTHING`,
        [employeeId, context.tenantId, `pilot-${employeeId}`, `Сотрудник ${employeeId.slice(-6)}`],
      );
      const inserted = await client.query(
         `INSERT INTO staff_attendance_events
           (id, tenant_id, employee_id, event_type, source, source_event_id,
            occurred_at, device_id, org_unit_id, actor_id, correlation_id)
         VALUES ($1, $2, $3, $4, 'terminal', $5, $6, $7, $8, $9, $10)
         ON CONFLICT (tenant_id, source, source_event_id) DO NOTHING RETURNING id`,
        [eventId, context.tenantId, employeeId, request.body.event_type,
          request.body.source_event_id, occurredAt.toISOString(), deviceId, orgUnitId,
          context.actorId, context.correlationId],
      );
      if (inserted.rowCount === 0) return { id: eventId, duplicate: true };

      const eventType = request.body.event_type === 'check_in'
        ? 'attendance.clock.in'
        : 'attendance.clock.out';
      await client.query(
        `INSERT INTO staff_outbox
           (id, tenant_id, event_type, event_version, subject_type, subject_id,
            actor_type, actor_id, payload, correlation_id, occurred_at)
         VALUES ($1, $2, $3, 1, 'Employee', $4, 'service', $5, $6, $7, $8)`,
        [newUlid(), context.tenantId, eventType, employeeId, context.actorId,
          { attendance_event_id: eventId, channel: 'platform_notification' },
          context.correlationId, occurredAt.toISOString()],
      );
      return { id: eventId, duplicate: false };
    });
    return reply.code(result.duplicate ? 200 : 201).send(result);
  });

  api.post<{ Body: ReconcileSessionsBody }>('/work-sessions/reconcile', {
    schema: {
      body: {
        type: 'object', additionalProperties: false,
        required: ['date_from', 'date_to'],
        properties: {
          date_from: { type: 'string', pattern: '^\\d{4}-\\d{2}-\\d{2}$' },
          date_to: { type: 'string', pattern: '^\\d{4}-\\d{2}-\\d{2}$' },
          business_day_start_hour: { type: 'integer', minimum: 0, maximum: 23 },
          automatic_close_hour: { type: 'integer', minimum: 0, maximum: 23 },
          open_shift_threshold_minutes: { type: 'integer', minimum: 60, maximum: 2880 },
        },
      },
    },
  }, async (request, reply) => {
    assertCookieMutationOrigin(request);
    const context = await requirePermission(identity, request, 'staff:shift:confirm');
    const from = parseDateOnly(request.body.date_from);
    const to = parseDateOnly(request.body.date_to);
    if (!from || !to || to < from) return reply.badRequest('Некорректный период сверки.');
    const periodDays = Math.floor((to.valueOf() - from.valueOf()) / 86_400_000) + 1;
    if (periodDays > 40) return reply.badRequest('За один раз можно сверить не более 40 дней.');
    const businessDayStartHour = request.body.business_day_start_hour ?? 4;
    const automaticCloseHour = request.body.automatic_close_hour ?? 2;
    const thresholdMinutes = request.body.open_shift_threshold_minutes ?? 14 * 60;
    const now = new Date().toISOString();

    const summary = await database.tenantTransaction(context.tenantId, context.actorId, async (client) => {
      const attendance = await client.query(
        `WITH categorized AS (
           SELECT a.id, a.employee_id, a.event_type, a.occurred_at,
                  COALESCE(a.org_unit_id, e.primary_org_unit_id) AS org_unit_id,
                  COALESCE(u.timezone, 'UTC') AS timezone,
                  ((a.occurred_at AT TIME ZONE COALESCE(u.timezone, 'UTC'))
                    - make_interval(hours => $3))::date AS business_date
           FROM staff_attendance_events a
           JOIN staff_employees e ON e.tenant_id = a.tenant_id AND e.id = a.employee_id
           LEFT JOIN staff_org_units u ON u.tenant_id = a.tenant_id
             AND u.id = COALESCE(a.org_unit_id, e.primary_org_unit_id)
           WHERE a.status = 'accepted'
             AND a.occurred_at >= ($1::date - INTERVAL '2 days')
             AND a.occurred_at < ($2::date + INTERVAL '3 days')
         )
         SELECT id, employee_id, event_type, occurred_at, org_unit_id, timezone,
                business_date::text,
                (((business_date + 1)::timestamp + make_interval(hours => $4))
                  AT TIME ZONE timezone) AS automatic_close_at
         FROM categorized
         WHERE business_date BETWEEN $1::date AND $2::date
         ORDER BY employee_id, org_unit_id NULLS LAST, business_date, occurred_at, id`,
        [request.body.date_from, request.body.date_to, businessDayStartHour, automaticCloseHour],
      );

      type AttendanceRow = {
        id: string; employee_id: string; event_type: 'check_in' | 'check_out';
        occurred_at: Date | string; org_unit_id: string | null; business_date: string;
        automatic_close_at: Date | string;
      };
      const grouped = new Map<string, AttendanceRow[]>();
      let unresolvedEvents = 0;
      for (const row of attendance.rows as AttendanceRow[]) {
        if (!row.org_unit_id) {
          unresolvedEvents += 1;
          continue;
        }
        const key = `${row.employee_id}:${row.org_unit_id}:${row.business_date}`;
        const group = grouped.get(key) ?? [];
        group.push(row);
        grouped.set(key, group);
      }

      let createdOrUpdated = 0;
      let confirmedSkipped = 0;
      let anomalous = 0;
      for (const rows of grouped.values()) {
        const first = rows[0];
        if (!first?.org_unit_id) continue;
        const candidate = reconcileWorkSession(
          rows.map((row) => ({
            id: row.id,
            type: row.event_type,
            occurredAt: toIsoInstant(row.occurred_at),
          })),
          {
            now,
            openShiftThresholdMinutes: thresholdMinutes,
            automaticCloseAt: toIsoInstant(first.automatic_close_at),
          },
        );
        if (!candidate) continue;
        if (candidate.anomalies.length > 0) anomalous += 1;
        const saved = await client.query(
          `INSERT INTO staff_work_sessions
             (id, tenant_id, employee_id, org_unit_id, business_date, started_at, ended_at,
              worked_minutes, source, status, anomaly, source_event_ids, auto_closed)
           VALUES ($1, $2, $3, $4, $5, $6, $7, $8, 'terminal', $9, $10, $11, $12)
           ON CONFLICT (tenant_id, employee_id, org_unit_id, business_date) DO UPDATE SET
             started_at = EXCLUDED.started_at,
             ended_at = EXCLUDED.ended_at,
             worked_minutes = EXCLUDED.worked_minutes,
             status = EXCLUDED.status,
             anomaly = EXCLUDED.anomaly,
             source_event_ids = EXCLUDED.source_event_ids,
             auto_closed = EXCLUDED.auto_closed,
             updated_at = now(),
             revision = staff_work_sessions.revision + 1
           WHERE staff_work_sessions.status <> 'confirmed'
           RETURNING id, employee_id, org_unit_id, business_date, started_at, ended_at,
                     worked_minutes, status, anomaly, source_event_ids, auto_closed, revision`,
          [newUlid(), context.tenantId, first.employee_id, first.org_unit_id,
            first.business_date, candidate.startedAt, candidate.endedAt, candidate.workedMinutes,
            candidate.status, candidate.anomalies.join(',') || null,
            JSON.stringify(candidate.attendanceEventIds), candidate.anomalies.includes('auto_closed')],
        );
        if (saved.rowCount === 0) {
          confirmedSkipped += 1;
          continue;
        }
        createdOrUpdated += 1;
        const result = saved.rows[0] as Record<string, unknown>;
        await client.query(
          `INSERT INTO staff_audit_log
             (id, tenant_id, actor_id, action, entity_type, entity_id, new_values, correlation_id)
           VALUES ($1, $2, $3, 'work_session.reconciled', 'WorkSession', $4, $5, $6)`,
          [newUlid(), context.tenantId, context.actorId, result.id, result, context.correlationId],
        );
      }
      return {
        groups: grouped.size,
        sessions_created_or_updated: createdOrUpdated,
        confirmed_sessions_skipped: confirmedSkipped,
        anomalous_sessions: anomalous,
        unresolved_events: unresolvedEvents,
      };
    });
    return reply.send(summary);
  });

  api.patch<{ Params: { sessionId: string }; Body: ConfirmSessionBody }>(
    '/work-sessions/:sessionId',
    {
      schema: {
        params: { type: 'object', required: ['sessionId'], properties: {
          sessionId: { type: 'string', pattern: '^[0-9A-HJKMNP-TV-Z]{26}$' },
        } },
        body: { type: 'object', additionalProperties: false, required: ['status'], properties: {
          status: { enum: ['confirmed', 'rejected'] },
          worked_minutes: { type: 'integer', minimum: 0, maximum: 2880 },
          started_at: { anyOf: [{ type: 'string', format: 'date-time' }, { type: 'null' }] },
          ended_at: { anyOf: [{ type: 'string', format: 'date-time' }, { type: 'null' }] },
          correction_note: { type: 'string', maxLength: 1000 },
        } },
      },
    },
    async (request, reply) => {
      assertCookieMutationOrigin(request);
      const context = await requirePermission(identity, request, 'staff:shift:confirm');
      const sessionId = parseUlid(request.params.sessionId);
      const outcome = await database.tenantTransaction(context.tenantId, context.actorId, async (client) => {
        const currentQuery = await client.query(
          `SELECT id, employee_id, org_unit_id, business_date, started_at, ended_at,
                  worked_minutes, status, anomaly, correction_note, source_event_ids,
                  auto_closed, revision
           FROM staff_work_sessions WHERE tenant_id = $1 AND id = $2 FOR UPDATE`,
          [context.tenantId, sessionId],
        );
        if (currentQuery.rowCount === 0) return { kind: 'missing' as const };
        const current = currentQuery.rows[0] as Record<string, unknown>;
        const currentStartedAt = parseDatabaseOptionalInstant(current.started_at);
        const currentEndedAt = parseDatabaseOptionalInstant(current.ended_at);
        const startedAt = request.body.started_at === undefined
          ? currentStartedAt
          : parseOptionalInstant(request.body.started_at);
        const endedAt = request.body.ended_at === undefined
          ? currentEndedAt
          : parseOptionalInstant(request.body.ended_at);
        const workedMinutes = request.body.worked_minutes ?? Number(current.worked_minutes);
        const changed = workedMinutes !== Number(current.worked_minutes)
          || startedAt !== currentStartedAt || endedAt !== currentEndedAt;
        const correctionNote = request.body.correction_note?.trim() ?? '';
        if (changed && !correctionNote) return { kind: 'note_required' as const };
        if (startedAt && endedAt && new Date(endedAt) < new Date(startedAt)) {
          return { kind: 'invalid_interval' as const };
        }
        const saved = await client.query(
          `UPDATE staff_work_sessions SET
             started_at = $3, ended_at = $4, worked_minutes = $5, status = $6,
             correction_note = $7, confirmed_by = CASE WHEN $6 = 'confirmed' THEN $8 ELSE NULL END,
             confirmed_at = CASE WHEN $6 = 'confirmed' THEN now() ELSE NULL END,
             updated_at = now(), revision = revision + 1
           WHERE tenant_id = $1 AND id = $2
           RETURNING id, employee_id, org_unit_id, business_date, started_at, ended_at,
                     worked_minutes, status, anomaly, correction_note, source_event_ids,
                     auto_closed, confirmed_by, confirmed_at, revision`,
          [context.tenantId, sessionId, startedAt, endedAt, workedMinutes,
            request.body.status, correctionNote, context.actorId],
        );
        const result = saved.rows[0] as Record<string, unknown>;
        await client.query(
          `INSERT INTO staff_audit_log
             (id, tenant_id, actor_id, action, entity_type, entity_id,
              old_values, new_values, correlation_id)
           VALUES ($1, $2, $3, 'work_session.reviewed', 'WorkSession', $4, $5, $6, $7)`,
          [newUlid(), context.tenantId, context.actorId, sessionId,
            current, result, context.correlationId],
        );
        if (request.body.status === 'confirmed') {
          await client.query(
            `INSERT INTO staff_timesheet_entries
               (id, tenant_id, employee_id, work_date, minutes_worked, status, note, updated_by)
             VALUES ($1, $2, $3, $4, $5, 'submitted', $6, $7)
             ON CONFLICT (tenant_id, employee_id, work_date) DO UPDATE SET
               minutes_worked = EXCLUDED.minutes_worked,
               status = CASE WHEN staff_timesheet_entries.status = 'approved'
                 THEN staff_timesheet_entries.status ELSE 'submitted' END,
               note = EXCLUDED.note,
               revision = staff_timesheet_entries.revision + 1,
               updated_by = EXCLUDED.updated_by, updated_at = now()`,
            [newUlid(), context.tenantId, current.employee_id, current.business_date,
              workedMinutes, correctionNote, context.actorId],
          );
          await client.query(
            `INSERT INTO staff_outbox
               (id, tenant_id, event_type, event_version, subject_type, subject_id,
                actor_type, actor_id, payload, correlation_id)
             VALUES ($1, $2, 'staff.work_session.confirmed', 1, 'WorkSession', $3,
                     'user', $4, $5, $6)`,
            [newUlid(), context.tenantId, sessionId, context.actorId,
              { employee_id: current.employee_id, business_date: current.business_date,
                worked_minutes: workedMinutes }, context.correlationId],
          );
        }
        return { kind: 'saved' as const, session: result };
      });
      if (outcome.kind === 'missing') return reply.notFound('Смена не найдена.');
      if (outcome.kind === 'note_required') {
        return reply.badRequest('Для ручной корректировки смены укажите причину.');
      }
      if (outcome.kind === 'invalid_interval') {
        return reply.badRequest('Окончание смены не может быть раньше начала.');
      }
      return reply.send(outcome.session);
    },
  );

  api.put<{ Params: { employeeId: string; workDate: string }; Body: TimesheetBody }>(
    '/timesheets/:employeeId/:workDate',
    {
      schema: {
        params: { type: 'object', required: ['employeeId', 'workDate'], properties: {
          employeeId: { type: 'string', pattern: '^[0-9A-HJKMNP-TV-Z]{26}$' },
          workDate: { type: 'string', pattern: '^\\d{4}-\\d{2}-\\d{2}$' },
        } },
        body: { type: 'object', additionalProperties: false,
          required: ['minutes_worked', 'status'], properties: {
            minutes_worked: { type: 'integer', minimum: 0, maximum: 1440 },
            status: { enum: ['draft', 'submitted', 'approved', 'rejected'] },
            note: { type: 'string', maxLength: 1000 },
          } },
      },
    },
    async (request, reply) => {
      assertCookieMutationOrigin(request);
      const context = await requirePermission(identity, request, 'staff:attendance:manage');
      if (!datePattern.test(request.params.workDate)) return reply.badRequest('Некорректная дата.');
      const employeeId = parseUlid(request.params.employeeId);
      if (request.body.status === 'approved' && !context.permissions.has('staff:attendance:approve')) {
        return reply.forbidden('Для утверждения табеля требуется отдельное право.');
      }

      const row = await database.tenantTransaction(context.tenantId, context.actorId, async (client) => {
        const saved = await client.query(
          `INSERT INTO staff_timesheet_entries
             (id, tenant_id, employee_id, work_date, minutes_worked, status, note, updated_by)
           VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
           ON CONFLICT (tenant_id, employee_id, work_date) DO UPDATE SET
             minutes_worked = EXCLUDED.minutes_worked, status = EXCLUDED.status,
             note = EXCLUDED.note, revision = staff_timesheet_entries.revision + 1,
             updated_by = EXCLUDED.updated_by, updated_at = now()
           RETURNING id, employee_id, work_date, minutes_worked, status, note, revision, updated_at`,
          [newUlid(), context.tenantId, employeeId, request.params.workDate,
            request.body.minutes_worked, request.body.status, request.body.note ?? '', context.actorId],
        );
        const result = saved.rows[0] as Record<string, unknown>;
        await client.query(
          `INSERT INTO staff_audit_log
             (id, tenant_id, actor_id, action, entity_type, entity_id, new_values, correlation_id)
           VALUES ($1, $2, $3, 'timesheet.entry.saved', 'TimesheetEntry', $4, $5, $6)`,
          [newUlid(), context.tenantId, context.actorId, result.id, result, context.correlationId],
        );
        return result;
      });
      return reply.send(row);
    },
  );
}

async function resolveContext(identity: IdentityPort, request: FastifyRequest): Promise<RequestContext> {
  const authorization = request.headers.authorization;
  const token = authorization?.startsWith('Bearer ')
    ? authorization.slice(7)
    : readCookie(request.headers.cookie, sessionCookieName);
  return resolveToken(identity, token, request);
}

async function resolveToken(
  identity: IdentityPort,
  token: string | undefined,
  request: FastifyRequest,
): Promise<RequestContext> {
  try {
    return await identity.resolve(token, parseUlid(request.id));
  } catch {
    throw request.server.httpErrors.unauthorized('Требуется действующий ключ доступа.');
  }
}

function readCookie(header: string | undefined, name: string): string | undefined {
  if (!header) return undefined;
  for (const part of header.split(';')) {
    const separator = part.indexOf('=');
    if (separator < 0 || part.slice(0, separator).trim() !== name) continue;
    try {
      return decodeURIComponent(part.slice(separator + 1).trim());
    } catch {
      return undefined;
    }
  }
  return undefined;
}

function serializeSessionCookie(value: string, maxAge: number): string {
  return `${sessionCookieName}=${encodeURIComponent(value)}; Path=/; Max-Age=${maxAge}; HttpOnly; Secure; SameSite=Strict`;
}

function assertSameOrigin(request: FastifyRequest) {
  const origin = request.headers.origin;
  if (!origin) return;
  try {
    const parsed = new URL(origin);
    if (parsed.protocol !== 'https:' || parsed.host !== request.headers.host) throw new Error();
  } catch {
    throw request.server.httpErrors.forbidden('Запрос с постороннего сайта отклонён.');
  }
}

function assertCookieMutationOrigin(request: FastifyRequest) {
  if (!request.headers.authorization && readCookie(request.headers.cookie, sessionCookieName)) {
    assertSameOrigin(request);
  }
}

async function requirePermission(identity: IdentityPort, request: FastifyRequest, permission: string) {
  const context = await resolveContext(identity, request);
  if (!context.permissions.has(permission)) {
    throw request.server.httpErrors.forbidden('Недостаточно прав для этой операции.');
  }
  return context;
}

function parseDateOnly(value: string): Date | null {
  if (!datePattern.test(value)) return null;
  const parsed = new Date(`${value}T00:00:00.000Z`);
  return Number.isNaN(parsed.valueOf()) || parsed.toISOString().slice(0, 10) !== value
    ? null
    : parsed;
}

function toIsoInstant(value: Date | string): string {
  const parsed = value instanceof Date ? value : new Date(value);
  if (Number.isNaN(parsed.valueOf())) throw new Error('Database returned an invalid timestamp');
  return parsed.toISOString();
}

function parseOptionalInstant(value: string | null): string | null {
  if (value === null) return null;
  const parsed = new Date(value);
  if (Number.isNaN(parsed.valueOf())) throw new Error('Invalid date-time');
  return parsed.toISOString();
}

function parseDatabaseOptionalInstant(value: unknown): string | null {
  if (value === null || value === undefined) return null;
  if (value instanceof Date) return toIsoInstant(value);
  if (typeof value === 'string') return toIsoInstant(value);
  throw new Error('Database returned an invalid optional timestamp');
}