import assert from 'node:assert/strict';
import { after, before, describe, it } from 'node:test';
import { randomUUID } from 'node:crypto';
import {
  AssignmentDayStatus,
  AssignmentType,
  UserAssignmentStatus,
  UserRole,
} from '@prisma/client';
import { prisma } from '../src/lib/prisma.js';
import { AUDIT_ACTIONS } from '../src/modules/admin/auditActions.js';
import {
  assertNoSecrets,
  authHeader,
  createTestApp,
  isDatabaseAvailable,
  requestJson,
} from './helpers.js';

const app = createTestApp();
const createdUserIds: bigint[] = [];
const createdDefinitionIds: bigint[] = [];

async function trackUser(externalId: string | undefined) {
  if (!externalId) return;
  const user = await prisma.user.findUnique({ where: { externalId } });
  if (user) createdUserIds.push(user.id);
}

async function register(email: string, password = 'password12') {
  const result = await requestJson(app, '/auth/register', {
    method: 'POST',
    body: JSON.stringify({ email, password }),
  });
  await trackUser((result.body.data?.user as { id?: string } | undefined)?.id);
  return result;
}

async function promoteAndLogin(email: string): Promise<{ token: string; userId: bigint }> {
  const registered = await register(email);
  assert.equal(registered.status, 201);
  const externalId = (registered.body.data?.user as { id: string }).id;
  const user = await prisma.user.findUniqueOrThrow({ where: { externalId } });
  await prisma.user.update({ where: { id: user.id }, data: { role: UserRole.admin } });
  const login = await requestJson(app, '/auth/login', {
    method: 'POST',
    body: JSON.stringify({ email, password: 'password12' }),
  });
  assert.equal(login.status, 200);
  return {
    token: login.body.data?.sessionToken as string,
    userId: user.id,
  };
}

async function ensureCourseSession(order: number, title: string) {
  const existing = await prisma.courseSession.findUnique({ where: { order } });
  if (existing) {
    return prisma.courseSession.update({
      where: { order },
      data: { title },
    });
  }
  return prisma.courseSession.create({
    data: {
      sessionKey: `admin-detail-test-${order}-${Date.now()}`,
      order,
      title,
      description: 'admin assignment detail test',
      estimatedDurationMinutes: 10,
      blocks: [],
    },
  });
}

async function createDefinition(input: {
  key: string;
  sessionOrder: number;
  title: string;
  expectedDurationDays?: number | null;
}) {
  await ensureCourseSession(input.sessionOrder, `جلسه detail ${input.sessionOrder}`);
  const def = await prisma.assignmentDefinition.create({
    data: {
      key: input.key,
      sessionOrder: input.sessionOrder,
      title: input.title,
      description: 'desc',
      instructions: 'instr',
      assignmentType: AssignmentType.DAILY,
      expectedDurationDays:
        input.expectedDurationDays !== undefined ? input.expectedDurationDays : 4,
      displayOrder: input.sessionOrder,
    },
  });
  createdDefinitionIds.push(def.id);
  return def;
}

describe('admin assignment detail', () => {
  let dbAvailable = false;

  before(async () => {
    dbAvailable = await isDatabaseAvailable();
  });

  after(async () => {
    if (!dbAvailable) return;
    if (createdUserIds.length > 0) {
      await prisma.auditLog.deleteMany({
        where: {
          OR: [
            { actorUserId: { in: createdUserIds } },
            { targetUserId: { in: createdUserIds } },
          ],
        },
      });
      await prisma.user.deleteMany({ where: { id: { in: createdUserIds } } });
    }
    if (createdDefinitionIds.length > 0) {
      await prisma.assignmentDefinition.deleteMany({
        where: { id: { in: createdDefinitionIds } },
      });
    }
  });

  it('returns 401 without session', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }
    const { status, raw } = await requestJson(
      app,
      `/admin/users/${randomUUID()}/assignments/1`,
    );
    assert.equal(status, 401);
    assertNoSecrets(raw);
  });

  it('returns 403 for a normal user', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }
    const registered = await register(`detail-user-${Date.now()}@example.com`);
    const token = registered.body.data?.sessionToken as string;
    const id = (registered.body.data?.user as { id: string }).id;
    const { status, body, raw } = await requestJson(app, `/admin/users/${id}/assignments/1`, {
      headers: authHeader(token),
    });
    assert.equal(status, 403);
    assert.equal(body.error?.code, 'FORBIDDEN');
    assertNoSecrets(raw);
  });

  it('returns 422 for invalid externalId or assignmentId', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }
    const { token } = await promoteAndLogin(`detail-invalid-${Date.now()}@example.com`);
    const badUser = await requestJson(app, '/admin/users/not-a-uuid/assignments/1', {
      headers: authHeader(token),
    });
    assert.equal(badUser.status, 422);

    const badAssignment = await requestJson(
      app,
      `/admin/users/${randomUUID()}/assignments/not-numeric`,
      { headers: authHeader(token) },
    );
    assert.equal(badAssignment.status, 422);
  });

  it('returns 404 for missing user', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }
    const { token } = await promoteAndLogin(`detail-missing-${Date.now()}@example.com`);
    const { status, body } = await requestJson(
      app,
      `/admin/users/${randomUUID()}/assignments/1`,
      { headers: authHeader(token) },
    );
    assert.equal(status, 404);
    assert.equal(body.error?.code, 'NOT_FOUND');
  });

  it('returns detail for owned assignment, hides foreign assignment, and records audit', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }
    const stamp = Date.now();
    const { token, userId: adminId } = await promoteAndLogin(
      `detail-admin-${stamp}@example.com`,
    );
    const targetReg = await register(`detail-target-${stamp}@example.com`);
    const otherReg = await register(`detail-other-${stamp}@example.com`);
    const targetId = (targetReg.body.data?.user as { id: string }).id;
    const otherId = (otherReg.body.data?.user as { id: string }).id;
    const target = await prisma.user.findUniqueOrThrow({ where: { externalId: targetId } });
    const other = await prisma.user.findUniqueOrThrow({ where: { externalId: otherId } });

    const def = await createDefinition({
      key: `detail-def-${stamp}`,
      sessionOrder: 9,
      title: 'جزئیات تمرین',
      expectedDurationDays: 4,
    });
    const otherDef = await createDefinition({
      key: `detail-other-def-${stamp}`,
      sessionOrder: 10,
      title: 'تکلیف دیگری',
    });

    const activatedAt = new Date('2026-04-01T10:00:00.000Z');
    const startedAt = new Date('2026-04-02T10:00:00.000Z');
    const ua = await prisma.userAssignment.create({
      data: {
        userId: target.id,
        definitionId: def.id,
        status: UserAssignmentStatus.IN_PROGRESS,
        activatedAt,
        startedAt,
        lastActivityAt: new Date('2026-04-03T12:00:00.000Z'),
        draftData: { secretField: 'must-not-leak' },
        completionNote: 'private note',
      },
    });
    await prisma.assignmentDailyEntry.create({
      data: {
        userAssignmentId: ua.id,
        userId: target.id,
        entryDate: new Date('2026-04-02'),
        dayStatus: AssignmentDayStatus.done,
        responseData: { answer: 'private' },
        note: 'private entry note',
      },
    });
    await prisma.assignmentReport.create({
      data: {
        userAssignmentId: ua.id,
        userId: target.id,
        reportText: 'secret report text',
        reportStatus: 'in_progress',
      },
    });

    const foreign = await prisma.userAssignment.create({
      data: {
        userId: other.id,
        definitionId: otherDef.id,
        status: UserAssignmentStatus.ACTIVE,
      },
    });

    await prisma.learningJourney.upsert({
      where: { userId: target.id },
      create: {
        userId: target.id,
        preTestCompletedAt: new Date(),
        trainingStartedAt: new Date(),
      },
      update: {
        preTestCompletedAt: new Date(),
        trainingStartedAt: new Date(),
      },
    });

    const before = await prisma.userAssignment.findUniqueOrThrow({ where: { id: ua.id } });

    const { status, body, raw } = await requestJson(
      app,
      `/admin/users/${targetId}/assignments/${ua.id.toString()}`,
      { headers: authHeader(token) },
    );
    assert.equal(status, 200);
    assertNoSecrets(raw);
    assert.equal(
      !/must-not-leak|private note|secret report|passwordHash|draftData|responseData/i.test(raw),
      true,
    );

    const data = body.data as {
      user: { id: string };
      assignment: {
        id: string;
        definitionTitle: string;
        status: string;
        assignedAt: string;
        startedAt: string | null;
        doneDayCount: number;
        expectedDurationDays: number | null;
        progressPercent: number | null;
      };
      session: { order: number; title: string };
      learningProgress: {
        currentStep: string | null;
        totalLessons: number;
        completedLessons: number;
      };
      activity: {
        firstActivityAt: string | null;
        lastActivityAt: string | null;
        completedActivityCount: number;
      } | null;
    };

    assert.equal(data.user.id, targetId);
    assert.equal(data.assignment.id, ua.id.toString());
    assert.equal(data.assignment.definitionTitle, 'جزئیات تمرین');
    assert.equal(data.assignment.status, UserAssignmentStatus.IN_PROGRESS);
    assert.equal(data.assignment.assignedAt, activatedAt.toISOString());
    assert.equal(data.assignment.startedAt, startedAt.toISOString());
    assert.equal(data.assignment.doneDayCount, 1);
    assert.equal(data.assignment.expectedDurationDays, 4);
    assert.equal(data.assignment.progressPercent, 25);
    assert.equal(data.session.order, 9);
    assert.ok(data.session.title);
    assert.equal(data.learningProgress.currentStep, 'training_in_progress');
    assert.ok(data.activity);
    assert.equal(data.activity!.completedActivityCount, 1);
    assert.ok(data.activity!.firstActivityAt);

    const foreignRes = await requestJson(
      app,
      `/admin/users/${targetId}/assignments/${foreign.id.toString()}`,
      { headers: authHeader(token) },
    );
    assert.equal(foreignRes.status, 404);
    assert.equal(foreignRes.body.error?.code, 'NOT_FOUND');
    assert.equal(!/تکلیف دیگری|Other/i.test(foreignRes.raw), true);

    const missing = await requestJson(
      app,
      `/admin/users/${targetId}/assignments/999999999999`,
      { headers: authHeader(token) },
    );
    assert.equal(missing.status, 404);

    const after = await prisma.userAssignment.findUniqueOrThrow({ where: { id: ua.id } });
    assert.equal(after.status, before.status);
    assert.equal(after.updatedAt.toISOString(), before.updatedAt.toISOString());
    assert.deepEqual(after.draftData, before.draftData);

    const audit = await prisma.auditLog.findFirst({
      where: {
        actorUserId: adminId,
        action: AUDIT_ACTIONS.ADMIN_VIEW_ASSIGNMENT,
        targetId: ua.id.toString(),
      },
      orderBy: { createdAt: 'desc' },
    });
    assert.ok(audit);
    const meta = audit!.metadata as Record<string, unknown>;
    assert.equal(meta.view, 'assignment_detail');
    assert.equal(meta.externalId, targetId);
    assert.equal(meta.assignmentId, ua.id.toString());
    assert.equal(!JSON.stringify(meta).includes('must-not-leak'), true);
  });
});