-- Footprints 数据库 schema（开发桥接与 Rust 后端共用同一份）
-- v2：加入多端同步地基（uuid v7 / 软删除墓碑 / HLC / 变更日志）

CREATE TABLE IF NOT EXISTS footprint_type (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  name TEXT NOT NULL UNIQUE,
  icon TEXT NOT NULL DEFAULT 'tag',
  color TEXT NOT NULL DEFAULT '#64748b',
  sort INTEGER NOT NULL DEFAULT 100,
  form_template TEXT NOT NULL DEFAULT '[]',
  is_builtin INTEGER NOT NULL DEFAULT 0,
  closed INTEGER NOT NULL DEFAULT 0,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT,
  created_at TEXT NOT NULL DEFAULT (datetime('now','localtime'))
);

CREATE TABLE IF NOT EXISTS taxonomy (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  kind TEXT NOT NULL,
  value TEXT NOT NULL,
  color TEXT,
  sort INTEGER NOT NULL DEFAULT 100,
  is_builtin INTEGER NOT NULL DEFAULT 0,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT,
  UNIQUE(kind, value)
);

CREATE TABLE IF NOT EXISTS dimension (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  name TEXT NOT NULL UNIQUE,
  color TEXT,
  sort INTEGER NOT NULL DEFAULT 100,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT
);

CREATE TABLE IF NOT EXISTS footprint (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  type_id INTEGER NOT NULL REFERENCES footprint_type(id),
  title TEXT NOT NULL,
  role TEXT,
  level TEXT,
  polarity TEXT NOT NULL DEFAULT 'positive',
  award_grade TEXT,
  rank INTEGER,
  organizer TEXT,
  start_date TEXT,
  end_date TEXT,
  status TEXT NOT NULL DEFAULT 'draft',
  description TEXT NOT NULL DEFAULT '',
  result TEXT NOT NULL DEFAULT '',
  metrics TEXT NOT NULL DEFAULT '{}',
  extras TEXT NOT NULL DEFAULT '{}',
  group_id TEXT,
  parent_id INTEGER,
  tags TEXT NOT NULL DEFAULT '[]',
  weight INTEGER NOT NULL DEFAULT 3,
  search_text TEXT NOT NULL DEFAULT '',
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT,
  created_at TEXT NOT NULL DEFAULT (datetime('now','localtime')),
  updated_at TEXT NOT NULL DEFAULT (datetime('now','localtime'))
);

CREATE TABLE IF NOT EXISTS footprint_dimension (
  footprint_id INTEGER NOT NULL REFERENCES footprint(id) ON DELETE CASCADE,
  dimension_id INTEGER NOT NULL REFERENCES dimension(id) ON DELETE CASCADE,
  PRIMARY KEY (footprint_id, dimension_id)
);

CREATE TABLE IF NOT EXISTS attachment (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  owner_type TEXT NOT NULL DEFAULT 'footprint',
  owner_id INTEGER NOT NULL,
  kind TEXT,
  file_name TEXT NOT NULL,
  mime TEXT,
  size INTEGER NOT NULL DEFAULT 0,
  rel_path TEXT NOT NULL,
  sha256 TEXT,
  thumb_rel_path TEXT,
  taken_at TEXT,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT,
  created_at TEXT NOT NULL DEFAULT (datetime('now','localtime'))
);

CREATE TABLE IF NOT EXISTS semester (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  term TEXT NOT NULL UNIQUE,
  gpa REAL,
  rank INTEGER,
  total_students INTEGER,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT
);

CREATE TABLE IF NOT EXISTS course_grade (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  semester_id INTEGER NOT NULL REFERENCES semester(id) ON DELETE CASCADE,
  course_name TEXT NOT NULL,
  credit REAL NOT NULL DEFAULT 0,
  score REAL,
  grade_point REAL,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT
);

-- 成绩梯度（等级带）：用户可配置；单科成绩按 min <= 分数 < max 定级（满分档闭区间）
CREATE TABLE IF NOT EXISTS grade_band (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  label TEXT NOT NULL,
  color TEXT NOT NULL DEFAULT '#64748b',
  min REAL NOT NULL DEFAULT 0,
  max REAL NOT NULL DEFAULT 100,
  sort INTEGER NOT NULL DEFAULT 100,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT
);

CREATE TABLE IF NOT EXISTS metric_def (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  key TEXT NOT NULL UNIQUE,
  label TEXT NOT NULL,
  unit TEXT,
  agg TEXT NOT NULL DEFAULT 'sum',
  section TEXT,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT
);

CREATE TABLE IF NOT EXISTS saved_view (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  uuid TEXT,
  name TEXT NOT NULL UNIQUE,
  filter TEXT NOT NULL DEFAULT '{}',
  sort TEXT NOT NULL DEFAULT '{}',
  is_default INTEGER NOT NULL DEFAULT 0,
  deleted_at TEXT,
  origin TEXT,
  hlc TEXT,
  updated_at TEXT NOT NULL DEFAULT (datetime('now','localtime'))
);

-- ===== 同步基础设施 =====
CREATE TABLE IF NOT EXISTS sync_state (
  key TEXT PRIMARY KEY,
  value TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS sync_oplog (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  table_name TEXT NOT NULL,
  row_uuid TEXT NOT NULL,
  op TEXT NOT NULL,
  hlc TEXT NOT NULL,
  synced_at TEXT
);

CREATE VIRTUAL TABLE IF NOT EXISTS footprint_fts USING fts5(
  search_text,
  content='footprint',
  content_rowid='id',
  tokenize='trigram'
);

CREATE TRIGGER IF NOT EXISTS footprint_ai AFTER INSERT ON footprint BEGIN
  INSERT INTO footprint_fts(rowid, search_text) VALUES (new.id, new.search_text);
END;
CREATE TRIGGER IF NOT EXISTS footprint_ad AFTER DELETE ON footprint BEGIN
  INSERT INTO footprint_fts(footprint_fts, rowid, search_text)
  VALUES ('delete', old.id, old.search_text);
END;
CREATE TRIGGER IF NOT EXISTS footprint_au AFTER UPDATE OF search_text ON footprint BEGIN
  INSERT INTO footprint_fts(footprint_fts, rowid, search_text)
  VALUES ('delete', old.id, old.search_text);
  INSERT INTO footprint_fts(rowid, search_text) VALUES (new.id, new.search_text);
END;

CREATE INDEX IF NOT EXISTS idx_footprint_start ON footprint(start_date);
CREATE INDEX IF NOT EXISTS idx_footprint_type ON footprint(type_id);
CREATE INDEX IF NOT EXISTS idx_footprint_group ON footprint(group_id);
CREATE INDEX IF NOT EXISTS idx_footprint_hlc ON footprint(hlc);
CREATE INDEX IF NOT EXISTS idx_att_owner ON attachment(owner_type, owner_id);
CREATE INDEX IF NOT EXISTS idx_oplog_pending ON sync_oplog(synced_at);

CREATE UNIQUE INDEX IF NOT EXISTS idx_footprint_uuid ON footprint(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_footprint_type_uuid ON footprint_type(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_taxonomy_uuid ON taxonomy(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_dimension_uuid ON dimension(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_attachment_uuid ON attachment(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_semester_uuid ON semester(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_course_grade_uuid ON course_grade(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_metric_def_uuid ON metric_def(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_saved_view_uuid ON saved_view(uuid);
CREATE UNIQUE INDEX IF NOT EXISTS idx_grade_band_uuid ON grade_band(uuid);