-- +goose Up
-- Очередь на добавление (docs/uploads.md, docs/data-model.md#очередь-на-добавление-загрузки).
CREATE TYPE upload_status AS ENUM (
  'uploading', 'processing', 'pending_review', 'approved', 'importing', 'imported',
  'import_failed', 'duplicate', 'invalid', 'rejected', 'withdrawn', 'expired');

CREATE TABLE upload_batches (
  id         uuid PRIMARY KEY,
  author_id  uuid NOT NULL REFERENCES users(id),
  comment    text,
  created_at timestamptz NOT NULL DEFAULT now()
);

CREATE TABLE upload_files (
  id                    uuid PRIMARY KEY,
  batch_id              uuid NOT NULL REFERENCES upload_batches(id) ON DELETE CASCADE,
  author_id             uuid NOT NULL REFERENCES users(id),
  status                upload_status NOT NULL,
  original_name         text NOT NULL,
  client_rel_path       text,
  size_bytes            bigint NOT NULL,
  received_bytes        bigint NOT NULL DEFAULT 0, -- смещение tus
  sha256                bytea,                     -- заявленный клиентом, после обработки — фактический
  staging_path          text,                      -- относительно каталога staging
  format                text,
  codec                 text,
  bitrate               int,
  sample_rate           int,
  bit_depth             int,
  duration_ms           int,
  tags                  jsonb,
  metadata              jsonb,
  metadata_edited       boolean NOT NULL DEFAULT false,
  fingerprint           int[],
  matched_artist_id     uuid REFERENCES artists(id) ON DELETE SET NULL,
  matched_album_id      uuid REFERENCES albums(id) ON DELETE SET NULL,
  duplicate_of_track_id uuid REFERENCES tracks(id) ON DELETE SET NULL,
  duplicate_level       text,
  possible_duplicate    boolean NOT NULL DEFAULT false,
  target_source_id      uuid REFERENCES library_sources(id) ON DELETE SET NULL,
  target_rel_path       text,
  status_reason         text,
  reviewed_by           uuid REFERENCES users(id) ON DELETE SET NULL,
  reviewed_at           timestamptz,
  imported_file_id      uuid REFERENCES media_files(id) ON DELETE SET NULL,
  created_at            timestamptz NOT NULL DEFAULT now(),
  updated_at            timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX upload_files_status_idx ON upload_files (status, updated_at);
CREATE INDEX upload_files_author_idx ON upload_files (author_id, created_at DESC, id DESC);
CREATE INDEX upload_files_batch_idx ON upload_files (batch_id);
CREATE INDEX upload_files_sha256_idx ON upload_files (sha256);

-- Занятое место очереди (одна строка): меняется в той же транзакции, что и статус.
CREATE TABLE upload_quota (
  id         boolean PRIMARY KEY DEFAULT true CHECK (id),
  used_bytes bigint NOT NULL DEFAULT 0
);
INSERT INTO upload_quota (id, used_bytes) VALUES (true, 0);

ALTER TABLE media_files ADD FOREIGN KEY (upload_file_id) REFERENCES upload_files(id) ON DELETE SET NULL;

-- +goose Down
ALTER TABLE media_files DROP CONSTRAINT media_files_upload_file_id_fkey;
DROP TABLE upload_quota;
DROP TABLE upload_files;
DROP TABLE upload_batches;
DROP TYPE upload_status;