import Database from "better-sqlite3";
import { mkdtempSync, rmSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, describe, expect, it } from "vitest";
import { DatabaseService } from "./database.service.js";
import { books, libraries, series } from "./schema.js";

const previousDatabasePath = process.env.DATABASE_PATH;
const previousStorageDir = process.env.STORAGE_DIR;
const tempDirs: string[] = [];

afterEach(() => {
  process.env.DATABASE_PATH = previousDatabasePath;
  process.env.STORAGE_DIR = previousStorageDir;
  for (const dir of tempDirs.splice(0)) {
    rmSync(dir, { recursive: true, force: true });
  }
});

describe("database migrations", () => {
  it.runIf(canLoadBetterSqlite())("adds metadata columns to an existing comic-capable books table before creating dependent indexes", () => {
    const dir = mkdtempSync(join(tmpdir(), "readabook-migration-"));
    tempDirs.push(dir);
    const databasePath = join(dir, "readabook.sqlite");
    const storageDir = join(dir, "storage");

    const legacy = new Database(databasePath);
    const now = new Date().toISOString();
    legacy.exec(`
      CREATE TABLE users (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        email TEXT NOT NULL UNIQUE,
        name TEXT,
        password_hash TEXT NOT NULL,
        role TEXT NOT NULL DEFAULT 'user' CHECK (role IN ('admin','user')),
        created_at TEXT NOT NULL,
        updated_at TEXT NOT NULL
      );

      CREATE TABLE libraries (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        name TEXT NOT NULL,
        path TEXT NOT NULL,
        enabled INTEGER NOT NULL DEFAULT 1,
        created_at TEXT NOT NULL,
        updated_at TEXT NOT NULL
      );

      CREATE TABLE books (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        library_id INTEGER NOT NULL REFERENCES libraries(id) ON DELETE CASCADE,
        title TEXT NOT NULL,
        author TEXT,
        description TEXT,
        isbn TEXT,
        language TEXT,
        publisher TEXT,
        published_date TEXT,
        format TEXT NOT NULL CHECK (format IN ('epub','pdf','cbz','cbr')),
        file_path TEXT NOT NULL UNIQUE,
        cover_path TEXT,
        file_size INTEGER NOT NULL,
        file_mtime TEXT NOT NULL,
        created_at TEXT NOT NULL,
        updated_at TEXT NOT NULL
      );

      CREATE TABLE progress (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
        book_id INTEGER NOT NULL REFERENCES books(id) ON DELETE CASCADE,
        locator TEXT NOT NULL,
        percent INTEGER NOT NULL CHECK (percent >= 0 AND percent <= 100),
        created_at TEXT NOT NULL,
        updated_at TEXT NOT NULL,
        UNIQUE(user_id, book_id)
      );

      CREATE TABLE jobs (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        type TEXT NOT NULL,
        status TEXT NOT NULL CHECK (status IN ('queued','running','succeeded','failed')),
        detail TEXT,
        error TEXT,
        created_at TEXT NOT NULL,
        updated_at TEXT NOT NULL
      );

      INSERT INTO libraries (id, name, path, enabled, created_at, updated_at)
      VALUES (1, 'Corpus', '/library', 1, '${now}', '${now}');
      INSERT INTO books (
        library_id, title, author, description, isbn, language, publisher, published_date,
        format, file_path, cover_path, file_size, file_mtime, created_at, updated_at
      )
      VALUES
        (1, 'Solo Leveling T03', NULL, NULL, NULL, NULL, NULL, NULL, 'cbz', '/library/Solo Leveling T03.cbz', NULL, 42, '${now}', '${now}', '${now}'),
        (1, 'Eyeshield.21.T01.FRENCH.CBZ.eBook-ebdz', NULL, NULL, NULL, NULL, NULL, NULL, 'cbz', '/library/Eyeshield.21.T01.FRENCH.CBZ.eBook-ebdz.cbz', NULL, 42, '${now}', '${now}', '${now}'),
        (1, 'Dragon.Ball.SD.T01.FRENCH.CBZ.eBook-Paprika+', NULL, NULL, NULL, NULL, NULL, NULL, 'cbz', '/library/Dragon.Ball.SD.T01.FRENCH.CBZ.eBook-Paprika+.cbz', NULL, 42, '${now}', '${now}', '${now}');
    `);
    legacy.close();

    process.env.DATABASE_PATH = databasePath;
    process.env.STORAGE_DIR = storageDir;

    const database = new DatabaseService();
    const bookColumns = database.sqlite.prepare("PRAGMA table_info(books)").all() as Array<{ name: string }>;
    const bookIndexes = database.sqlite.prepare("PRAGMA index_list(books)").all() as Array<{ name: string }>;
    const metadataSources = database.sqlite.prepare("SELECT provider FROM metadata_source_config ORDER BY priority").all() as Array<{ provider: string }>;
    const seriesRows = database.sqlite
      .prepare(
        `
        SELECT books.title, books.volume_number, books.volume_label, series.title AS series_title, series.normalized_title
        FROM books
        JOIN series ON series.id = books.series_id
        ORDER BY books.title
      `
      )
      .all() as Array<{
      title: string;
      volume_number: number | null;
      volume_label: string | null;
      series_title: string;
      normalized_title: string;
    }>;
    const automationSettings = database.sqlite.prepare("SELECT id, isbn_priority_enabled FROM automation_settings").get() as
      | { id: number; isbn_priority_enabled: number }
      | undefined;

    expect(bookColumns.map((column) => column.name)).toContain("isbn13");
    expect(bookColumns.map((column) => column.name)).toContain("identifiers_json");
    expect(bookColumns.map((column) => column.name)).toContain("scan_status");
    expect(bookColumns.map((column) => column.name)).toContain("enrichment_status");
    expect(bookColumns.map((column) => column.name)).toContain("series_id");
    expect(bookColumns.map((column) => column.name)).toContain("volume_number");
    expect(bookColumns.map((column) => column.name)).toContain("volume_label");
    expect(bookIndexes.map((index) => index.name)).toContain("books_isbn13_idx");
    expect(bookIndexes.map((index) => index.name)).toContain("books_series_idx");
    expect(seriesRows).toEqual([
      {
        title: "Dragon.Ball.SD.T01.FRENCH.CBZ.eBook-Paprika+",
        volume_number: 1,
        volume_label: "T01",
        series_title: "Dragon Ball SD",
        normalized_title: "dragon ball sd"
      },
      {
        title: "Eyeshield.21.T01.FRENCH.CBZ.eBook-ebdz",
        volume_number: 1,
        volume_label: "T01",
        series_title: "Eyeshield 21",
        normalized_title: "eyeshield 21"
      },
      {
        title: "Solo Leveling T03",
        volume_number: 3,
        volume_label: "T03",
        series_title: "Solo Leveling",
        normalized_title: "solo leveling"
      }
    ]);
    expect(metadataSources.map((source) => source.provider)).toEqual(["local", "openlibrary", "googlebooks", "bnf", "mangadex", "comicvine"]);
    expect(automationSettings).toMatchObject({ id: 1, isbn_priority_enabled: 1 });

    database.onModuleDestroy();
  });

  it.runIf(canLoadBetterSqlite())("backfills missing Daredevil volume numbers when series already exists", () => {
    const dir = mkdtempSync(join(tmpdir(), "readabook-series-backfill-"));
    tempDirs.push(dir);
    process.env.DATABASE_PATH = join(dir, "readabook.sqlite");
    process.env.STORAGE_DIR = join(dir, "storage");

    const first = new DatabaseService();
    const now = first.now();
    const library = first.db
      .insert(libraries)
      .values({ name: "Corpus", path: "/library", enabled: true, createdAt: now, updatedAt: now })
      .returning()
      .get();
    const daredevil = first.db
      .insert(series)
      .values({
        title: "Daredevil",
        normalizedTitle: "daredevil",
        description: null,
        publisher: null,
        createdAt: now,
        updatedAt: now
      })
      .returning()
      .get();
    first.db
      .insert(books)
      .values({
        libraryId: library.id,
        seriesId: daredevil.id,
        title: "Daredevil",
        author: null,
        description: null,
        isbn: null,
        isbn13: null,
        identifiersJson: null,
        localMetadataJson: null,
        language: null,
        publisher: null,
        publishedDate: null,
        volumeNumber: null,
        volumeLabel: null,
        format: "cbz",
        filePath: "/library/Daredevil - 001[Sebmov].cbz",
        coverPath: null,
        metadataStatus: "none",
        metadataProvenanceJson: JSON.stringify({ title: "local" }),
        scanStatus: "succeeded",
        enrichmentStatus: "idle",
        fileSize: 42,
        fileMtime: now,
        createdAt: now,
        updatedAt: now
      })
      .run();
    first.onModuleDestroy();

    const second = new DatabaseService();
    const row = second.sqlite.prepare("SELECT volume_number, volume_label FROM books WHERE file_path = ?").get(
      "/library/Daredevil - 001[Sebmov].cbz"
    ) as { volume_number: number | null; volume_label: string | null };

    expect(row).toEqual({ volume_number: 1, volume_label: "001" });

    second.onModuleDestroy();
  });
});

function canLoadBetterSqlite(): boolean {
  try {
    new Database(":memory:").close();
    return true;
  } catch {
    return false;
  }
}