-- 恢复 pg-boss 需要的函数
-- 从备份文件 rds_init_20251224_154529.sql 提取

-- 1. create_queue 函数
CREATE OR REPLACE FUNCTION platform_schema.create_queue(queue_name text, options jsonb) RETURNS void
    LANGUAGE plpgsql
    AS $_$
    DECLARE
      tablename varchar := CASE WHEN options->>'partition' = 'true'
                            THEN 'j' || encode(sha224(queue_name::bytea), 'hex')
                            ELSE 'job_common'
                            END;
      queue_created_on timestamptz;
    BEGIN

      WITH q as (
        INSERT INTO platform_schema.queue (
          name,
          policy,
          retry_limit,
          retry_delay,
          retry_backoff,
          retry_delay_max,
          expire_seconds,
          retention_seconds,
          deletion_seconds,
          warning_queued,
          dead_letter,
          partition,
          table_name
        )
        VALUES (
          queue_name,
          options->>'policy',
          COALESCE((options->>'retryLimit')::int, 2),
          COALESCE((options->>'retryDelay')::int, 0),
          COALESCE((options->>'retryBackoff')::bool, false),
          (options->>'retryDelayMax')::int,
          COALESCE((options->>'expireInSeconds')::int, 900),
          COALESCE((options->>'retentionSeconds')::int, 1209600),
          COALESCE((options->>'deleteAfterSeconds')::int, 604800),
          COALESCE((options->>'warningQueueSize')::int, 0),
          options->>'deadLetter',
          COALESCE((options->>'partition')::bool, false),
          tablename
        )
        ON CONFLICT DO NOTHING
        RETURNING created_on
      )
      SELECT created_on into queue_created_on from q;

      IF queue_created_on IS NULL OR options->>'partition' IS DISTINCT FROM 'true' THEN
        RETURN;
      END IF;

      EXECUTE format('CREATE TABLE platform_schema.%I (LIKE platform_schema.job INCLUDING DEFAULTS)', tablename);

      EXECUTE format('ALTER TABLE platform_schema.%1$I ADD PRIMARY KEY (name, id)', tablename);
      EXECUTE format('ALTER TABLE platform_schema.%1$I ADD CONSTRAINT q_fkey FOREIGN KEY (name) REFERENCES platform_schema.queue (name) ON DELETE RESTRICT DEFERRABLE INITIALLY DEFERRED', tablename);
      EXECUTE format('ALTER TABLE platform_schema.%1$I ADD CONSTRAINT dlq_fkey FOREIGN KEY (dead_letter) REFERENCES platform_schema.queue (name) ON DELETE RESTRICT DEFERRABLE INITIALLY DEFERRED', tablename);

      EXECUTE format('CREATE INDEX %1$s_i5 ON platform_schema.%1$I (name, start_after) INCLUDE (priority, created_on, id) WHERE state < ''active''', tablename);
      EXECUTE format('CREATE UNIQUE INDEX %1$s_i4 ON platform_schema.%1$I (name, singleton_on, COALESCE(singleton_key, '''')) WHERE state <> ''cancelled'' AND singleton_on IS NOT NULL', tablename);

      IF options->>'policy' = 'short' THEN
        EXECUTE format('CREATE UNIQUE INDEX %1$s_i1 ON platform_schema.%1$I (name, COALESCE(singleton_key, '''')) WHERE state = ''created'' AND policy = ''short''', tablename);
      ELSIF options->>'policy' = 'singleton' THEN
        EXECUTE format('CREATE UNIQUE INDEX %1$s_i2 ON platform_schema.%1$I (name, COALESCE(singleton_key, '''')) WHERE state = ''active'' AND policy = ''singleton''', tablename);
      ELSIF options->>'policy' = 'stately' THEN
        EXECUTE format('CREATE UNIQUE INDEX %1$s_i3 ON platform_schema.%1$I (name, state, COALESCE(singleton_key, '''')) WHERE state <= ''active'' AND policy = ''stately''', tablename);
      ELSIF options->>'policy' = 'exclusive' THEN
        EXECUTE format('CREATE UNIQUE INDEX %1$s_i6 ON platform_schema.%1$I (name, COALESCE(singleton_key, '''')) WHERE state <= ''active'' AND policy = ''exclusive''', tablename);
      END IF;

      EXECUTE format('ALTER TABLE platform_schema.%I ADD CONSTRAINT cjc CHECK (name=%L)', tablename, queue_name);
      EXECUTE format('ALTER TABLE platform_schema.job ATTACH PARTITION platform_schema.%I FOR VALUES IN (%L)', tablename, queue_name);
    END;
    $_$;

-- 2. delete_queue 函数
CREATE OR REPLACE FUNCTION platform_schema.delete_queue(queue_name text) RETURNS void
    LANGUAGE plpgsql
    AS $$
    DECLARE
      v_table varchar;
      v_partition bool;
    BEGIN
      SELECT table_name, partition
      FROM platform_schema.queue
      WHERE name = queue_name
      INTO v_table, v_partition;

      IF v_partition THEN
        EXECUTE format('DROP TABLE IF EXISTS platform_schema.%I', v_table);
      ELSE
        EXECUTE format('DELETE FROM platform_schema.%I WHERE name = %L', v_table, queue_name);
      END IF;

      DELETE FROM platform_schema.queue WHERE name = queue_name;
    END;
    $$;