-- 계획서 §6.1 원안 — PostgreSQL 16 + pgvector 전환 시 사용 (ASSUMPTIONS.md §1)
-- 임베딩 차원(1024)은 모델 확정 후 조정할 것.
CREATE EXTENSION IF NOT EXISTS vector;

CREATE TABLE IF NOT EXISTS package(
  devclass TEXT PRIMARY KEY, text_ko TEXT, summary_json JSONB, embedding vector(1024)
);
CREATE TABLE IF NOT EXISTS program(
  name TEXT PRIMARY KEY, devclass TEXT, title_ko TEXT,
  created_on DATE, changed_on DATE, source_hash TEXT,
  summary_json JSONB, summary_status TEXT DEFAULT 'none', has_source BOOLEAN DEFAULT FALSE,
  embedding vector(1024), fts tsvector
);
CREATE TABLE IF NOT EXISTS include(
  program TEXT, include TEXT, code_hash TEXT, line_count INT, code TEXT,
  PRIMARY KEY(program, include)
);
CREATE TABLE IF NOT EXISTS unit(
  unit_id TEXT PRIMARY KEY, program TEXT, include TEXT, unit_type TEXT, name TEXT,
  line_start INT, line_end INT, code_hash TEXT, signature TEXT, header_comment TEXT,
  loc INT, refs_json JSONB, sub_chunks_json JSONB,
  summary_json JSONB, summary_status TEXT DEFAULT 'none', prompt_version INT DEFAULT 0,
  embedding vector(1024), fts tsvector
);
CREATE TABLE IF NOT EXISTS symbol(
  program TEXT, name TEXT, scope TEXT, unit_id TEXT, decl_include TEXT,
  decl_line INT, type_text TEXT, ddic_ref TEXT, kind TEXT
);
CREATE TABLE IF NOT EXISTS symbol_write(
  id BIGSERIAL PRIMARY KEY,
  program TEXT, symbol TEXT, unit_id TEXT, include TEXT, line INT, kind TEXT,
  source_symbols TEXT[], source_tables TEXT[], stmt_text TEXT, callee TEXT
);
CREATE TABLE IF NOT EXISTS symbol_read(
  program TEXT, symbol TEXT, unit_id TEXT, include TEXT, line INT
);
CREATE TABLE IF NOT EXISTS table_ref(
  program TEXT, unit_id TEXT, table_name TEXT, mode TEXT, line INT
);
CREATE TABLE IF NOT EXISTS call_edge(
  program TEXT, from_unit TEXT, to_unit TEXT, external_name TEXT, call_type TEXT, line INT
);
CREATE TABLE IF NOT EXISTS topo(program TEXT, unit_id TEXT, ord INT, PRIMARY KEY(program, unit_id));
CREATE TABLE IF NOT EXISTS ddic_table(name TEXT PRIMARY KEY, text_ko TEXT);
CREATE TABLE IF NOT EXISTS ddic_field(tabname TEXT, field TEXT, text_ko TEXT, data_element TEXT);
CREATE TABLE IF NOT EXISTS tcode(tcode TEXT PRIMARY KEY, program TEXT, text_ko TEXT);
CREATE TABLE IF NOT EXISTS eval_question(id TEXT PRIMARY KEY, question TEXT, expected_programs TEXT[], type TEXT);

CREATE INDEX IF NOT EXISTS idx_unit_fts ON unit USING GIN(fts);
CREATE INDEX IF NOT EXISTS idx_program_fts ON program USING GIN(fts);
CREATE INDEX IF NOT EXISTS idx_unit_emb ON unit USING hnsw(embedding vector_cosine_ops);
CREATE INDEX IF NOT EXISTS idx_program_emb ON program USING hnsw(embedding vector_cosine_ops);
CREATE INDEX IF NOT EXISTS idx_symbol_write ON symbol_write(program, symbol);
CREATE INDEX IF NOT EXISTS idx_table_ref ON table_ref(table_name);
CREATE INDEX IF NOT EXISTS idx_edge_to ON call_edge(to_unit);
CREATE INDEX IF NOT EXISTS idx_edge_ext ON call_edge(external_name);