-- 1. Bảng CSDL Công Trình Khoa Học (Academic Works - Thống nhất đa loại hình & Fast-Path Cache)
CREATE TABLE IF NOT EXISTS academic_works (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  doi TEXT NOT NULL UNIQUE COLLATE NOCASE,
  registration_agency TEXT NOT NULL DEFAULT 'Crossref',
  work_type TEXT NOT NULL DEFAULT 'journal-article',
  work_type_label TEXT,
  title TEXT NOT NULL,
  chapter_title TEXT,
  book_title TEXT,
  series_title TEXT,
  journal_title TEXT,
  container_title TEXT,
  publisher TEXT,
  pub_year INTEGER,
  pub_date TEXT,
  volume TEXT,
  issue TEXT,
  pages TEXT,
  article_number TEXT,
  issn TEXT,
  isbn TEXT,
  authors TEXT,
  authors_detail_json TEXT,
  open_access INTEGER DEFAULT 0,
  citations_count INTEGER DEFAULT 0,
  is_preprint INTEGER DEFAULT 0,
  scopus_best_q TEXT,
  wos_collection TEXT,
  hdgsnn_max_score REAL,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_academic_works_doi ON academic_works(doi);
CREATE INDEX IF NOT EXISTS idx_academic_works_year ON academic_works(pub_year);
CREATE INDEX IF NOT EXISTS idx_academic_works_type ON academic_works(work_type);

-- 2. Bảng lưu trữ chỉ số Scopus (SJR & CiteScore qua các năm)
CREATE TABLE IF NOT EXISTS scopus_metrics (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  issn TEXT NOT NULL,
  eissn TEXT,
  journal_title TEXT NOT NULL,
  year INTEGER NOT NULL,
  sjr REAL,
  sjr_best_quartile TEXT,
  h_index INTEGER,
  citescore REAL,
  citescore_quartile TEXT,
  highest_percentile REAL,
  categories_json TEXT,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_scopus_issn_year ON scopus_metrics(issn, year);
CREATE INDEX IF NOT EXISTS idx_scopus_eissn_year ON scopus_metrics(eissn, year);

-- 3. Bảng Master List Web of Science (Clarivate)
CREATE TABLE IF NOT EXISTS wos_master_list (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  issn TEXT NOT NULL,
  eissn TEXT,
  journal_title TEXT NOT NULL,
  publisher TEXT,
  primary_collection TEXT NOT NULL, -- SCIE, SSCI, AHCI, ESCI
  collections_json TEXT,
  is_active INTEGER DEFAULT 1,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_wos_issn ON wos_master_list(issn);
CREATE INDEX IF NOT EXISTS idx_wos_eissn ON wos_master_list(eissn);

-- 4. Bảng Danh Mục Tạp Chí Hội Đồng Giáo Sư Nhà Nước (HĐGSNN)
CREATE TABLE IF NOT EXISTS hdgsnn_journals (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  journal_title TEXT NOT NULL,
  issn TEXT NOT NULL,
  eissn TEXT,
  council_code TEXT NOT NULL,
  council_name TEXT NOT NULL,
  max_score REAL NOT NULL,
  year INTEGER NOT NULL,
  decision_no TEXT NOT NULL,
  note TEXT,
  source_url TEXT,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_hdgsnn_issn_year ON hdgsnn_journals(issn, year);
CREATE INDEX IF NOT EXISTS idx_hdgsnn_eissn_year ON hdgsnn_journals(eissn, year);
CREATE INDEX IF NOT EXISTS idx_hdgsnn_issn_council_year ON hdgsnn_journals(issn, council_code, year);
CREATE INDEX IF NOT EXISTS idx_hdgsnn_title ON hdgsnn_journals(journal_title);

-- 5. Bảng Cache Định Danh Bài Báo (Scopus EID & WoS UT)
CREATE TABLE IF NOT EXISTS article_identifiers (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  doi TEXT NOT NULL UNIQUE,
  scopus_eid TEXT,
  scopus_url TEXT,
  wos_ut TEXT,
  wos_url TEXT,
  source TEXT DEFAULT 'api',
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_identifiers_doi ON article_identifiers(doi);

-- 6. Bảng Đối Chiếu Song Ánh ISSN & eISSN (ISSN Crosswalk)
CREATE TABLE IF NOT EXISTS issn_crosswalk (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  issn TEXT NOT NULL,
  eissn TEXT NOT NULL,
  journal_title TEXT,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_crosswalk_issn ON issn_crosswalk(issn);
CREATE INDEX IF NOT EXISTS idx_crosswalk_eissn ON issn_crosswalk(eissn);

-- 7. Bảng Nhật Ký Nguồn & Khám Phá Tự Động (System Source Logs)
CREATE TABLE IF NOT EXISTS system_source_logs (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  source_id TEXT NOT NULL,
  event_type TEXT NOT NULL,
  status TEXT NOT NULL,
  details_json TEXT,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_logs_source ON system_source_logs(source_id);

-- 8. Bảng Quản Lý Metadata Hệ Thống (DB Metadata)
CREATE TABLE IF NOT EXISTS db_metadata (
  key TEXT PRIMARY KEY,
  value TEXT NOT NULL,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);