CREATE TABLE IF NOT EXISTS admin_users (
  id BIGSERIAL PRIMARY KEY,
  login TEXT NOT NULL UNIQUE,
  password_hash TEXT NOT NULL,
  role TEXT NOT NULL DEFAULT 'admin' CHECK (role IN ('admin','editor','viewer')),
  is_active BOOLEAN NOT NULL DEFAULT TRUE,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS admin_sessions (
  token_hash TEXT PRIMARY KEY,
  user_id BIGINT NOT NULL REFERENCES admin_users(id) ON DELETE CASCADE,
  csrf_token TEXT NOT NULL,
  expires_at TIMESTAMPTZ NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_admin_sessions_user_id ON admin_sessions(user_id);
CREATE INDEX IF NOT EXISTS idx_admin_sessions_expires_at ON admin_sessions(expires_at);

CREATE TABLE IF NOT EXISTS sources (
  id BIGSERIAL PRIMARY KEY,
  platform TEXT NOT NULL DEFAULT 'vk',
  name TEXT NOT NULL,
  url TEXT NOT NULL,
  external_id TEXT,
  external_owner_id BIGINT,
  active BOOLEAN NOT NULL DEFAULT TRUE,
  status TEXT NOT NULL DEFAULT 'new',
  status_msg TEXT,
  parse_from TIMESTAMPTZ,
  last_checked_at TIMESTAMPTZ,
  last_parsed_at TIMESTAMPTZ,
  priority INTEGER NOT NULL DEFAULT 100,
  tags TEXT[] NOT NULL DEFAULT ARRAY[]::TEXT[],
  settings_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  created_by BIGINT REFERENCES admin_users(id) ON DELETE SET NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  archived_at TIMESTAMPTZ
);

CREATE UNIQUE INDEX IF NOT EXISTS ux_sources_platform_url_active
ON sources(platform, lower(url))
WHERE archived_at IS NULL;

CREATE INDEX IF NOT EXISTS idx_sources_active_platform ON sources(active, platform, priority, id)
WHERE archived_at IS NULL;

CREATE TABLE IF NOT EXISTS raw_posts (
  id BIGSERIAL PRIMARY KEY,
  source_id BIGINT NOT NULL REFERENCES sources(id) ON DELETE CASCADE,
  platform TEXT NOT NULL,
  external_post_id TEXT NOT NULL,
  external_owner_id BIGINT,
  original_url TEXT NOT NULL,
  storage_owner_id BIGINT,
  storage_post_id BIGINT,
  storage_post_url TEXT,
  raw_text TEXT NOT NULL DEFAULT '',
  raw_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  text_hash TEXT NOT NULL,
  content_hash TEXT NOT NULL,
  posted_at TIMESTAMPTZ,
  copied_at TIMESTAMPTZ,
  status TEXT NOT NULL DEFAULT 'raw_saved',
  skip_reason TEXT,
  error_reason TEXT,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  UNIQUE(source_id, external_post_id)
);

CREATE INDEX IF NOT EXISTS idx_raw_posts_status_created ON raw_posts(status, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_raw_posts_source_posted ON raw_posts(source_id, posted_at DESC);
CREATE INDEX IF NOT EXISTS idx_raw_posts_content_hash ON raw_posts(content_hash);

CREATE TABLE IF NOT EXISTS raw_post_media (
  id BIGSERIAL PRIMARY KEY,
  raw_post_id BIGINT NOT NULL REFERENCES raw_posts(id) ON DELETE CASCADE,
  platform TEXT NOT NULL,
  media_type TEXT NOT NULL CHECK (media_type IN ('photo','video','link','doc','unknown')),
  original_url TEXT,
  original_attachment_id TEXT,
  storage_attachment_id TEXT,
  storage_url TEXT,
  preview_url TEXT,
  width INTEGER,
  height INTEGER,
  duration_sec INTEGER,
  sort_order INTEGER NOT NULL DEFAULT 0,
  status TEXT NOT NULL DEFAULT 'pending',
  attempts INTEGER NOT NULL DEFAULT 0,
  error TEXT,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_raw_post_media_post ON raw_post_media(raw_post_id, sort_order, id);
CREATE INDEX IF NOT EXISTS idx_raw_post_media_status ON raw_post_media(status);

CREATE TABLE IF NOT EXISTS jobs (
  id BIGSERIAL PRIMARY KEY,
  type TEXT NOT NULL,
  entity_type TEXT NOT NULL,
  entity_id BIGINT NOT NULL,
  payload_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  status TEXT NOT NULL DEFAULT 'pending',
  attempts INTEGER NOT NULL DEFAULT 0,
  max_attempts INTEGER NOT NULL DEFAULT 5,
  next_run_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  locked_by TEXT,
  locked_at TIMESTAMPTZ,
  last_error TEXT,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE UNIQUE INDEX IF NOT EXISTS ux_jobs_open_entity_type
ON jobs(type, entity_type, entity_id)
WHERE status IN ('pending','retry','in_progress');

CREATE INDEX IF NOT EXISTS idx_jobs_claim ON jobs(type, status, next_run_at, id);

CREATE TABLE IF NOT EXISTS worker_controls (
  name TEXT PRIMARY KEY,
  enabled BOOLEAN NOT NULL DEFAULT TRUE,
  settings_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  updated_by BIGINT REFERENCES admin_users(id) ON DELETE SET NULL,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS worker_heartbeats (
  name TEXT PRIMARY KEY,
  heartbeat_at TIMESTAMPTZ NOT NULL,
  status TEXT NOT NULL DEFAULT 'running',
  current_job_id BIGINT,
  meta_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS app_settings (
  key TEXT PRIMARY KEY,
  value_json JSONB NOT NULL,
  value_type TEXT NOT NULL DEFAULT 'str',
  title TEXT NOT NULL DEFAULT '',
  description TEXT NOT NULL DEFAULT '',
  category TEXT NOT NULL DEFAULT 'General',
  updated_by BIGINT REFERENCES admin_users(id) ON DELETE SET NULL,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS audit_log (
  id BIGSERIAL PRIMARY KEY,
  actor_id BIGINT REFERENCES admin_users(id) ON DELETE SET NULL,
  action TEXT NOT NULL,
  entity_type TEXT NOT NULL,
  entity_id BIGINT,
  before_json JSONB,
  after_json JSONB,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

INSERT INTO worker_controls(name, enabled, settings_json)
VALUES
  ('vk-parser', TRUE, '{}'::jsonb),
  ('vk-storage-uploader', TRUE, '{}'::jsonb)
ON CONFLICT (name) DO NOTHING;

INSERT INTO app_settings(key, value_json, value_type, title, description, category)
VALUES
  ('parser_interval_sec', '300'::jsonb, 'int', 'Parser interval, sec', 'Pause between parser cycles.', 'Parser'),
  ('parser_new_source_lookback_days', '14'::jsonb, 'int', 'New source lookback, days', 'How far back to read a new source.', 'Parser'),
  ('parser_reparse_overlap_minutes', '120'::jsonb, 'int', 'Reparse overlap, min', 'Overlap window for known sources.', 'Parser'),
  ('parser_min_text_length', '50'::jsonb, 'int', 'Minimum text length', 'Posts with shorter text are treated as junk.', 'Parser'),
  ('parser_skip_reposts', 'true'::jsonb, 'bool', 'Skip reposts', 'Do not save reposts from VK copy_history.', 'Parser'),
  ('parser_skip_empty_text', 'true'::jsonb, 'bool', 'Skip empty text posts', 'Treat posts without text as junk.', 'Parser'),
  ('parser_skip_no_media', 'true'::jsonb, 'bool', 'Skip posts without media', 'Treat posts without media as junk.', 'Parser'),
  ('parser_skip_text_too_short', 'true'::jsonb, 'bool', 'Skip short text posts', 'Treat posts shorter than parser_min_text_length as junk.', 'Parser'),
  ('parser_store_skipped_posts', 'false'::jsonb, 'bool', 'Store skipped posts', 'Keep junk posts in raw_posts instead of dropping them.', 'Parser'),
  ('parser_dedupe_content_hash', 'true'::jsonb, 'bool', 'Dedupe by content hash', 'Skip posts whose text and media hash already exists in raw_posts.', 'Parser'),
  ('parser_source_pause_sec', '0'::jsonb, 'float', 'Source pause, sec', 'Pause between VK sources inside one parser cycle.', 'Parser'),
  ('vk_requests_per_second', '3'::jsonb, 'int', 'VK requests per second', 'Global VK API rate limit per worker.', 'VK'),
  ('vk_wall_page_size', '50'::jsonb, 'int', 'VK wall page size', 'wall.get count per page.', 'VK'),
  ('vk_api_timeout_total_sec', '15'::jsonb, 'int', 'VK total timeout, sec', 'Total timeout for one VK API request.', 'VK'),
  ('vk_api_timeout_connect_sec', '5'::jsonb, 'int', 'VK connect timeout, sec', 'Connection timeout for VK API.', 'VK'),
  ('vk_rate_limit_sleep_sec', '1'::jsonb, 'float', 'VK rate limit sleep, sec', 'Sleep after VK API rate limit error code 6.', 'VK'),
  ('vk_api_retry_attempts', '3'::jsonb, 'int', 'VK retry attempts', 'Attempts for temporary VK API/network errors.', 'VK'),
  ('vk_api_retry_min_delay_sec', '2'::jsonb, 'float', 'VK retry min delay, sec', 'Initial retry delay for temporary VK errors.', 'VK'),
  ('vk_api_retry_max_delay_sec', '10'::jsonb, 'float', 'VK retry max delay, sec', 'Maximum retry delay for temporary VK errors.', 'VK'),
  ('uploader_interval_sec', '5'::jsonb, 'int', 'Uploader idle interval, sec', 'Pause when no jobs are available.', 'Uploader'),
  ('uploader_download_timeout_sec', '45'::jsonb, 'int', 'Download timeout, sec', 'Timeout for source media download.', 'Uploader')
ON CONFLICT (key) DO NOTHING;