-- 完整业务表（T0.1 的 0001 仅为 SELECT 1 占位且可能已记入 schema_migrations，故放在 0002）。
CREATE TABLE endpoints (
  id TEXT PRIMARY KEY,
  name TEXT NOT NULL DEFAULT '',
  remark TEXT NOT NULL DEFAULT '',
  source TEXT NOT NULL DEFAULT 'admin',
  login_hash TEXT NOT NULL,
  talk_hash TEXT,
  talk_version INTEGER NOT NULL DEFAULT 0,
  default_delay_ms INTEGER NOT NULL DEFAULT 0,
  enabled INTEGER NOT NULL DEFAULT 1,
  created_at INTEGER NOT NULL,
  online_since INTEGER,
  offline_since INTEGER,
  session_hash TEXT,
  session_issued_at INTEGER,
  session_used_at INTEGER
);

CREATE TABLE settings (
  key TEXT PRIMARY KEY,
  value TEXT NOT NULL,
  updated_at INTEGER NOT NULL
);

CREATE TABLE talk_grants (
  sender_id TEXT NOT NULL,
  target_id TEXT NOT NULL,
  target_talk_version INTEGER NOT NULL,
  kind TEXT NOT NULL,
  created_at INTEGER NOT NULL,
  PRIMARY KEY (sender_id, target_id)
);

CREATE TABLE groups (
  id TEXT PRIMARY KEY,
  name TEXT NOT NULL,
  owner_id TEXT NOT NULL,
  created_at INTEGER NOT NULL
);

CREATE TABLE group_members (
  group_id TEXT NOT NULL,
  endpoint_id TEXT NOT NULL,
  joined_at INTEGER NOT NULL,
  PRIMARY KEY (group_id, endpoint_id)
);

CREATE TABLE messages (
  seq INTEGER PRIMARY KEY,
  id TEXT NOT NULL,
  sender_id TEXT NOT NULL,
  dest_kind TEXT NOT NULL,
  dest_id TEXT NOT NULL,
  meta TEXT NOT NULL DEFAULT '{}',
  content_type TEXT NOT NULL,
  body_enc TEXT NOT NULL,
  send_at INTEGER NOT NULL,
  keep INTEGER NOT NULL,
  ttl_seconds INTEGER NOT NULL DEFAULT 0,
  receipt INTEGER NOT NULL,
  state TEXT NOT NULL,
  reason TEXT NOT NULL DEFAULT '',
  created_at INTEGER NOT NULL,
  UNIQUE (sender_id, id)
);

CREATE TABLE message_bodies (
  seq INTEGER PRIMARY KEY REFERENCES messages(seq) ON DELETE CASCADE,
  body BLOB NOT NULL
);

CREATE TABLE deliveries (
  seq INTEGER NOT NULL REFERENCES messages(seq) ON DELETE CASCADE,
  endpoint_id TEXT NOT NULL,
  send_at INTEGER NOT NULL,
  keep INTEGER NOT NULL,
  state TEXT NOT NULL,
  reason TEXT NOT NULL DEFAULT '',
  expire_at INTEGER,
  pushed_conn TEXT,
  pushed_at INTEGER,
  attempts INTEGER NOT NULL DEFAULT 0,
  updated_at INTEGER NOT NULL,
  PRIMARY KEY (seq, endpoint_id)
);

CREATE TABLE receipts (
  receipt_id INTEGER PRIMARY KEY,
  sender_id TEXT NOT NULL,
  msg_id TEXT NOT NULL,
  endpoint_id TEXT NOT NULL DEFAULT '',
  state TEXT NOT NULL,
  reason TEXT NOT NULL DEFAULT '',
  created_at INTEGER NOT NULL,
  acked INTEGER NOT NULL DEFAULT 0
);

CREATE TABLE send_keys (
  sender_id TEXT NOT NULL,
  msg_id TEXT NOT NULL,
  request_sha256 BLOB NOT NULL,
  created_at INTEGER NOT NULL,
  PRIMARY KEY (sender_id, msg_id)
);

CREATE TABLE admin_sessions (
  token_hash TEXT PRIMARY KEY,
  created_at INTEGER NOT NULL,
  expires_at INTEGER NOT NULL
);

CREATE TABLE api_tokens (
  id TEXT PRIMARY KEY,
  name TEXT NOT NULL,
  token_hash TEXT NOT NULL UNIQUE,
  enabled INTEGER NOT NULL DEFAULT 1,
  created_at INTEGER NOT NULL,
  last_used_at INTEGER
);

CREATE INDEX idx_messages_due ON messages(state, send_at);
CREATE INDEX idx_messages_dest ON messages(dest_kind, dest_id, state);
CREATE INDEX idx_messages_created ON messages(created_at);
CREATE INDEX idx_messages_sender ON messages(sender_id, created_at);
CREATE INDEX idx_messages_sender_state ON messages(sender_id, state);
CREATE INDEX idx_deliveries_outbox ON deliveries(endpoint_id, state, send_at, seq);
CREATE INDEX idx_deliveries_expire ON deliveries(state, expire_at);
CREATE INDEX idx_receipts_outbox ON receipts(sender_id, acked, receipt_id);
CREATE INDEX idx_talk_grants_target ON talk_grants(target_id);
CREATE INDEX idx_group_members_endpoint ON group_members(endpoint_id);