import { describe, expect, it } from "vitest";

import type { PersistentStorageAdapter } from "@/application/ports/PersistentStorageAdapter";
import { AdvanceCycleUseCase } from "@/application/use-cases/AdvanceCycleUseCase";
import { AddStudyItemResourceReferenceUseCase } from "@/application/use-cases/AddStudyItemResourceReferenceUseCase";
import { CreateContestUseCase } from "@/application/use-cases/CreateContestUseCase";
import { CreateStudyItemUseCase } from "@/application/use-cases/CreateStudyItemUseCase";
import { CreateSubjectUseCase } from "@/application/use-cases/CreateSubjectUseCase";
import { CreateTopicUseCase } from "@/application/use-cases/CreateTopicUseCase";
import { DeleteStudySessionUseCase } from "@/application/use-cases/DeleteStudySessionUseCase";
import { GetActiveCycleSnapshotUseCase } from "@/application/use-cases/GetActiveCycleSnapshotUseCase";
import { LinkQuestionNotebookUseCase } from "@/application/use-cases/LinkQuestionNotebookUseCase";
import { RegisterStudySessionUseCase } from "@/application/use-cases/RegisterStudySessionUseCase";
import { createDefaultLeifPluginData, type LeifPluginData } from "@/domain/types/LeifPluginData";
import { PluginDataStore } from "@/infrastructure/persistence/PluginDataStore";
import { EntityRepositoryFactory } from "@/infrastructure/persistence/EntityRepositoryFactory";

class InMemoryStorageAdapter implements PersistentStorageAdapter<LeifPluginData> {
  private data: LeifPluginData | null;

  constructor(initialData: LeifPluginData | null = null) {
    this.data = initialData;
  }

  async load(): Promise<LeifPluginData | null> {
    return this.data;
  }

  async save(data: LeifPluginData): Promise<void> {
    this.data = data;
  }
}

function createStore(): PluginDataStore {
  return new PluginDataStore(new InMemoryStorageAdapter(createDefaultLeifPluginData()));
}

describe("Study structure", () => {
  it("creates items and topics in order and exposes the active cycle snapshot", async () => {
    const store = createStore();
    const factory = new EntityRepositoryFactory(store);
    const createContest = new CreateContestUseCase(store, factory);
    const createSubject = new CreateSubjectUseCase(store, factory);
    const createStudyItem = new CreateStudyItemUseCase(store, factory);
    const createTopic = new CreateTopicUseCase(store, factory);
    const advanceCycle = new AdvanceCycleUseCase(store);
    const getSnapshot = new GetActiveCycleSnapshotUseCase(store);

    await createContest.execute({ id: "contest-1", name: "TRT" });
    await createSubject.execute({
      id: "subject-1",
      contestId: "contest-1",
      name: "Portuguese",
      plannedStudyMinutes: 60
    });
    const item1 = await createStudyItem.execute({ subjectId: "subject-1", title: "Sintaxe" });
    const item2 = await createStudyItem.execute({ subjectId: "subject-1", title: "Pontuação" });
    await createTopic.execute({
      id: "topic-1",
      subjectId: "subject-1",
      name: "Orações subordinadas"
    });

    await advanceCycle.execute();

    await expect(getSnapshot.execute()).resolves.toMatchObject({
      currentSubject: { id: "subject-1" },
      nextSubject: { id: "subject-1" },
      currentItemId: item1.id,
      nextItemId: item2.id
    });
  });

  it("recommends the first pending item before the cycle has been started", async () => {
    const store = createStore();
    const factory = new EntityRepositoryFactory(store);
    const createContest = new CreateContestUseCase(store, factory);
    const createSubject = new CreateSubjectUseCase(store, factory);
    const createStudyItem = new CreateStudyItemUseCase(store, factory);
    const getSnapshot = new GetActiveCycleSnapshotUseCase(store);

    await createContest.execute({ id: "contest-1", name: "TRT" });
    await createSubject.execute({
      id: "subject-1",
      contestId: "contest-1",
      name: "Portuguese",
      plannedStudyMinutes: 60
    });
    const item1 = await createStudyItem.execute({ subjectId: "subject-1", title: "Sintaxe" });
    await createStudyItem.execute({ subjectId: "subject-1", title: "Pontuação" });

    await expect(getSnapshot.execute()).resolves.toMatchObject({
      currentSubject: null,
      nextSubject: { id: "subject-1" },
      currentItemId: null,
      nextItemId: item1.id
    });
  });

  it("adds material resources to items, links a question notebook to topics, and registers study sessions", async () => {
    const store = createStore();
    const factory = new EntityRepositoryFactory(store);
    const createContest = new CreateContestUseCase(store, factory);
    const createSubject = new CreateSubjectUseCase(store, factory);
    const createStudyItem = new CreateStudyItemUseCase(store, factory);
    const addStudyItemResourceReference = new AddStudyItemResourceReferenceUseCase(store, factory);
    const createTopic = new CreateTopicUseCase(store, factory);
    const linkQuestionNotebook = new LinkQuestionNotebookUseCase(store, factory);
    const registerStudySession = new RegisterStudySessionUseCase(store, factory);

    await createContest.execute({ id: "contest-1", name: "TRT" });
    await createSubject.execute({
      id: "subject-1",
      contestId: "contest-1",
      name: "Portuguese",
      plannedStudyMinutes: 60
    });
    const item1 = await createStudyItem.execute({ subjectId: "subject-1", title: "Sintaxe" });
    await createTopic.execute({
      id: "topic-1",
      subjectId: "subject-1",
      name: "Orações subordinadas"
    });

    await addStudyItemResourceReference.execute({
      studyItemId: item1.id,
      resourceReference: {
        id: "resource-item-1",
        title: "Vídeo Aula 01",
        type: "video",
        url: "https://example.com/video-aula-01"
      }
    });
    await linkQuestionNotebook.execute({
      topicId: "topic-1",
      questionNotebook: {
        id: "notebook-1",
        name: "Tec Concursos - Orações",
        url: "https://tec.example.com/notebook-1",
        solvedQuestions: 0,
        correctAnswers: 0
      }
    });
    await registerStudySession.execute({
      id: "session-1",
      contestId: "contest-1",
      subjectId: "subject-1",
      topicId: "topic-1",
      type: "questions",
      studiedAt: "2026-06-11T20:00:00.000Z",
      pagesOrCount: 20,
      correctAnswers: 16,
      completed: true
    });

    const data = await store.load();

    expect(data.topics).toMatchObject([
      {
        id: "topic-1",
        resourceReferences: [],
        questionNotebook: {
          id: "notebook-1",
          name: "Tec Concursos - Orações",
          solvedQuestions: 20,
          correctAnswers: 16
        }
      }
    ]);
    expect(data.studyItems).toMatchObject([
      {
        resourceReferences: [
          {
            id: "resource-item-1",
            title: "Vídeo Aula 01",
            type: "video",
            url: "https://example.com/video-aula-01"
          }
        ]
      }
    ]);
    expect(data.studySessions).toMatchObject([
      {
        id: "session-1",
        type: "questions",
        pagesOrCount: 20,
        correctAnswers: 16
      }
    ]);
  });

  it("removes a question session and reverts notebook stats", async () => {
    const store = createStore();
    const factory = new EntityRepositoryFactory(store);
    const createContest = new CreateContestUseCase(store, factory);
    const createSubject = new CreateSubjectUseCase(store, factory);
    const createTopic = new CreateTopicUseCase(store, factory);
    const linkQuestionNotebook = new LinkQuestionNotebookUseCase(store, factory);
    const registerStudySession = new RegisterStudySessionUseCase(store, factory);
    const deleteStudySession = new DeleteStudySessionUseCase(store, factory);

    await createContest.execute({ id: "contest-1", name: "TRT" });
    await createSubject.execute({
      id: "subject-1",
      contestId: "contest-1",
      name: "Portuguese",
      plannedStudyMinutes: 60
    });
    await createTopic.execute({
      id: "topic-1",
      subjectId: "subject-1",
      name: "Orações subordinadas"
    });
    await linkQuestionNotebook.execute({
      topicId: "topic-1",
      questionNotebook: {
        id: "notebook-1",
        name: "Tec Concursos - Orações",
        url: "https://tec.example.com/notebook-1",
        solvedQuestions: 20,
        correctAnswers: 16
      }
    });
    await registerStudySession.execute({
      id: "session-1",
      contestId: "contest-1",
      subjectId: "subject-1",
      topicId: "topic-1",
      type: "questions",
      studiedAt: "2026-06-11",
      pagesOrCount: 20,
      correctAnswers: 16,
      completed: true
    });

    await deleteStudySession.execute({ sessionId: "session-1" });

    const data = await store.load();
    expect(data.studySessions).toHaveLength(0);
    expect(data.topics.find((topic) => topic.id === "topic-1")?.questionNotebook).toMatchObject({
      solvedQuestions: 20,
      correctAnswers: 16
    });
  });

  it("does not advance the current cycle when a question session is registered", async () => {
    const store = createStore();
    const factory = new EntityRepositoryFactory(store);
    const createContest = new CreateContestUseCase(store, factory);
    const createSubject = new CreateSubjectUseCase(store, factory);
    const advanceCycle = new AdvanceCycleUseCase(store);
    const registerStudySession = new RegisterStudySessionUseCase(store, factory);
    const getSnapshot = new GetActiveCycleSnapshotUseCase(store);

    await createContest.execute({ id: "contest-1", name: "TRT" });
    await createSubject.execute({
      id: "subject-1",
      contestId: "contest-1",
      name: "Portuguese",
      plannedStudyMinutes: 60
    });
    await createSubject.execute({
      id: "subject-2",
      contestId: "contest-1",
      name: "Constitutional Law",
      plannedStudyMinutes: 45
    });

    await advanceCycle.execute();
    await registerStudySession.execute({
      id: "session-2",
      contestId: "contest-1",
      subjectId: "subject-1",
      type: "questions",
      studiedAt: "2026-06-11T21:00:00.000Z",
      pagesOrCount: 10,
      correctAnswers: 8,
      completed: true
    });

    await expect(getSnapshot.execute()).resolves.toMatchObject({
      currentSubject: { id: "subject-1" },
      nextSubject: { id: "subject-2" }
    });
  });
});