-- content-atom: schema для MVP stage 1
-- Postgres (atom-db) + pgvector (расширение "vector")

CREATE EXTENSION IF NOT EXISTS vector;
CREATE EXTENSION IF NOT EXISTS pg_trgm;
CREATE EXTENSION IF NOT EXISTS btree_gin;

-- Проекты (домены)
CREATE TABLE projects (
  id        UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  slug      TEXT UNIQUE NOT NULL,
  name      TEXT NOT NULL,
  kind      TEXT NOT NULL,          -- site | service | social | podcast
  niche     TEXT,
  role      TEXT NOT NULL DEFAULT 'satellite',  -- flagship | satellite | experiment | service
  locale    TEXT DEFAULT 'ru',
  settings  JSONB DEFAULT '{}',
  status    TEXT DEFAULT 'active',  -- active | paused | archived
  created_at TIMESTAMPTZ DEFAULT now()
);
CREATE INDEX ON projects (role, niche);

-- Атомы
CREATE TABLE atoms (
  id             UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  project_id     UUID REFERENCES projects(id) ON DELETE CASCADE,
  type           TEXT NOT NULL,      -- claim | fact | stat | quote | definition | instruction | case | comparison | qa | opinion | hook | transition | cta | media_ref
  status         TEXT NOT NULL DEFAULT 'draft',
  title          TEXT,
  summary        TEXT,
  body           JSONB NOT NULL,
  plain_text     TEXT,
  language       TEXT DEFAULT 'ru',
  entities       JSONB DEFAULT '[]',
  topics         TEXT[] DEFAULT '{}',
  intent         TEXT,
  audience       TEXT,
  confidence     NUMERIC(3,2),
  quality_score  NUMERIC(4,2),
  word_count     INT,
  source_refs    JSONB DEFAULT '[]',
  embedding      VECTOR(1024),
  generator      JSONB,
  cost           JSONB,
  pipeline_stage TEXT,
  parent_atom_id UUID,
  lineage_root_id UUID,
  created_at     TIMESTAMPTZ DEFAULT now(),
  updated_at     TIMESTAMPTZ DEFAULT now()
);
CREATE INDEX ON atoms (project_id, type, status);
CREATE INDEX ON atoms USING gin (plain_text gin_trgm_ops);
CREATE INDEX ON atoms USING ivfflat (embedding vector_cosine_ops) WITH (lists = 100);

-- Версии под каналы
CREATE TABLE atom_versions (
  id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  atom_id       UUID REFERENCES atoms(id) ON DELETE CASCADE,
  channel       TEXT NOT NULL,       -- web_article | telegram | youtube_script | podcast | newsletter | service_card
  format        TEXT NOT NULL,       -- markdown | html | plain | srt | ssml | json
  content       TEXT NOT NULL,
  meta          JSONB DEFAULT '{}',
  quality_score NUMERIC(4,2),
  created_at    TIMESTAMPTZ DEFAULT now(),
  UNIQUE (atom_id, channel, format)
);
CREATE INDEX ON atom_versions (channel, created_at DESC);

-- Задачи пайплайна + стоимость
CREATE TABLE jobs (
  id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  kind         TEXT NOT NULL,        -- generate | edit | adapt | publish | index
  atom_id      UUID REFERENCES atoms(id),
  status       TEXT DEFAULT 'queued',
  attempts     INT DEFAULT 0,
  max_attempts INT DEFAULT 3,
  payload      JSONB DEFAULT '{}',
  error        TEXT,
  scheduled_at TIMESTAMPTZ DEFAULT now(),
  started_at   TIMESTAMPTZ,
  finished_at  TIMESTAMPTZ,
  created_at   TIMESTAMPTZ DEFAULT now()
);

CREATE TABLE runs (
  id          BIGSERIAL PRIMARY KEY,
  job_id      UUID REFERENCES jobs(id) ON DELETE CASCADE,
  stage       TEXT NOT NULL,
  model       TEXT,
  tokens_in   INT,
  tokens_out  INT,
  seconds     NUMERIC,
  cost_usd    NUMERIC DEFAULT 0,
  quality     NUMERIC(4,2),
  created_at  TIMESTAMPTZ DEFAULT now()
);

-- Индексы
CREATE INDEX ON jobs (status, scheduled_at);
CREATE INDEX ON runs (stage, created_at DESC);

-- Связи между атомами (дедup + lineage)
CREATE TABLE atom_relations (
  id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  atom_id_a       UUID REFERENCES atoms(id) ON DELETE CASCADE,
  atom_id_b       UUID REFERENCES atoms(id) ON DELETE CASCADE,
  relation_type   TEXT NOT NULL,   -- duplicate | related | superset | contradiction | parent_of
  similarity      NUMERIC(4,3),    -- cosine similarity (0-1)
  shared_topics   TEXT[] DEFAULT '{}',
  confidence      NUMERIC(3,2),
  source          TEXT,            -- semantic | lexical | manual
  created_at      TIMESTAMPTZ DEFAULT now(),
  UNIQUE (atom_id_a, atom_id_b, relation_type)
);
CREATE INDEX ON atom_relations (atom_id_a, relation_type);
CREATE INDEX ON atom_relations (atom_id_b, relation_type);
CREATE INDEX ON atom_relations (similarity DESC);