CREATE TABLE hdb_catalog.hdb_cron_triggers
(
  name TEXT PRIMARY KEY,
  webhook_conf JSON NOT NULL,
  cron_schedule TEXT NOT NULL,
  payload JSON,
  retry_conf JSON,
  header_conf JSON,
  include_in_metadata BOOLEAN NOT NULL DEFAULT FALSE,
  comment TEXT
);

CREATE TABLE hdb_catalog.hdb_cron_events
(
  id TEXT DEFAULT gen_random_uuid() PRIMARY KEY,
  trigger_name TEXT NOT NULL,
  scheduled_time TIMESTAMPTZ NOT NULL,
  additional_payload JSON,
  status TEXT NOT NULL DEFAULT 'scheduled',
  tries INTEGER NOT NULL DEFAULT 0,
  created_at TIMESTAMP DEFAULT NOW(),
  next_retry_at TIMESTAMPTZ,

  FOREIGN KEY (trigger_name) REFERENCES hdb_catalog.hdb_cron_triggers(name)
    ON UPDATE CASCADE ON DELETE CASCADE,
  CONSTRAINT valid_status CHECK (status IN ('scheduled','locked','delivered','error','dead'))
);

CREATE INDEX hdb_cron_event_status ON hdb_catalog.hdb_cron_events (status);

CREATE TABLE hdb_catalog.hdb_cron_event_invocation_logs
(
  id TEXT DEFAULT gen_random_uuid() PRIMARY KEY,
  event_id TEXT,
  status INTEGER,
  request JSON,
  response JSON,
  created_at TIMESTAMP DEFAULT NOW(),

  FOREIGN KEY (event_id) REFERENCES hdb_catalog.hdb_cron_events (id)
    ON UPDATE CASCADE ON DELETE CASCADE
);

CREATE VIEW hdb_catalog.hdb_cron_events_stats AS
  SELECT ct.name,
         COALESCE(ce.upcoming_events_count,0) as upcoming_events_count,
         COALESCE(ce.max_scheduled_time, now()) as max_scheduled_time
  FROM hdb_catalog.hdb_cron_triggers ct
  LEFT JOIN
  ( SELECT trigger_name, count(*) as upcoming_events_count, max(scheduled_time) as max_scheduled_time
    FROM hdb_catalog.hdb_cron_events
    WHERE tries = 0 AND status = 'scheduled'
    GROUP BY trigger_name
  ) ce
  ON ct.name = ce.trigger_name;

CREATE TABLE hdb_catalog.hdb_scheduled_events
(
  id TEXT DEFAULT gen_random_uuid() PRIMARY KEY,
  webhook_conf JSON NOT NULL,
  scheduled_time TIMESTAMPTZ NOT NULL,
  retry_conf JSON,
  payload JSON,
  header_conf JSON,
  status TEXT NOT NULL DEFAULT 'scheduled',
  tries INTEGER NOT NULL DEFAULT 0,
  created_at TIMESTAMP DEFAULT NOW(),
  next_retry_at TIMESTAMPTZ,
  comment TEXT,
  CONSTRAINT valid_status CHECK (status IN ('scheduled','locked','delivered','error','dead'))
);

CREATE INDEX hdb_scheduled_event_status ON hdb_catalog.hdb_scheduled_events (status);

CREATE TABLE hdb_catalog.hdb_scheduled_event_invocation_logs
(
id TEXT DEFAULT gen_random_uuid() PRIMARY KEY,
event_id TEXT,
status INTEGER,
request JSON,
response JSON,
created_at TIMESTAMP DEFAULT NOW(),

FOREIGN KEY (event_id) REFERENCES hdb_catalog.hdb_scheduled_events (id)
   ON DELETE CASCADE ON UPDATE CASCADE
);