-- =============================================================================
-- 脚本：05-fairness-late-replay-upgrade.sql
-- 用途：增加 API 任务调度优先级，并创建迟到告警规则重放所需的两张表。
-- 性质：增量数据库结构变更脚本，会修改表结构和数据。
-- 执行时机：04 预检通过后，部署三个新版服务之前。
--
-- 前置条件：
-- 1. 已完成数据库备份；
-- 2. API 拉取任务已经暂停；
-- 3. syslog-serve、syslog-consumer、syslog-consumer-rule 旧版本已停止；
-- 4. SCHEDULER_PRIORITY 字段和两张 ANALYSIS_* 表尚不存在。
--
-- 注意：本脚本不是重复执行脚本。执行成功后不要再次执行。
-- 如果中途报错，应先执行 06 验证已经创建的对象，再决定如何处理。
-- =============================================================================

-- 第 1 步：增加任务调度优先级。
-- 数值越大，在到期时间相同的情况下越先执行；默认值 0 兼容旧任务。
ALTER TABLE device_collect_api_config
  ADD scheduler_priority INTEGER DEFAULT 0 NOT NULL;

ALTER TABLE device_collect_api_config
  ADD CONSTRAINT ck_dc_api_cfg_priority
  CHECK(scheduler_priority BETWEEN -1000 AND 1000);

CREATE INDEX idx_dc_api_cfg_priority_due
  ON device_collect_api_config(enabled,next_run_at,scheduler_priority,collect_task_id);

-- 第 2 步：设置现有 NDR 任务的默认优先级。
-- 同一 NDR 主机只有一个并发许可时，让低流量告警优先于高流量原始网络日志。
UPDATE device_collect_api_config
SET scheduler_priority=100,updated_at=SYSDATE
WHERE stream_key='NDR_ALERT';

UPDATE device_collect_api_config
SET scheduler_priority=10,updated_at=SYSDATE
WHERE stream_key='NDR_FLOW_LOG';

-- 第 3 步：创建迟到告警分钟桶表。
-- 标准化告警入库时，如果其事件分钟已经被实时分析处理过，就在此表登记补处理请求。
CREATE TABLE analysis_late_alarm_bucket (
  id VARCHAR2(36) NOT NULL,
  device_id BIGINT NOT NULL,
  bucket_start TIMESTAMP NOT NULL,
  bucket_end TIMESTAMP NOT NULL,
  last_observed_at TIMESTAMP NOT NULL,
  requested_generation BIGINT DEFAULT 1 NOT NULL,
  claimed_generation BIGINT DEFAULT 0 NOT NULL,
  processed_generation BIGINT DEFAULT 0 NOT NULL,
  status VARCHAR2(16) DEFAULT 'PENDING' NOT NULL,
  attempt_count INTEGER DEFAULT 0 NOT NULL,
  fencing_token BIGINT DEFAULT 0 NOT NULL,
  lease_owner VARCHAR2(128),
  lease_expires_at TIMESTAMP,
  last_error_code VARCHAR2(128),
  last_error_summary VARCHAR2(2000),
  created_at TIMESTAMP DEFAULT SYSDATE NOT NULL,
  updated_at TIMESTAMP DEFAULT SYSDATE NOT NULL,
  CONSTRAINT pk_analysis_late_alarm_bucket PRIMARY KEY(id),
  CONSTRAINT uk_analysis_late_alarm_bucket UNIQUE(device_id,bucket_start),
  CONSTRAINT ck_analysis_late_bucket_status
    CHECK(status IN ('PENDING','RUNNING','COMPLETED','FAILED')),
  CONSTRAINT ck_analysis_late_bucket_gen
    CHECK(requested_generation>=claimed_generation
      AND claimed_generation>=processed_generation
      AND processed_generation>=0),
  CONSTRAINT ck_analysis_late_bucket_count CHECK(attempt_count>=0 AND fencing_token>=0),
  CONSTRAINT ck_analysis_late_bucket_window CHECK(bucket_end>bucket_start),
  CONSTRAINT ck_analysis_late_bucket_lease
    CHECK((lease_owner IS NULL AND lease_expires_at IS NULL)
      OR (lease_owner IS NOT NULL AND lease_expires_at IS NOT NULL))
);

CREATE INDEX idx_analysis_late_bucket_due
  ON analysis_late_alarm_bucket(status,lease_expires_at,bucket_start);

-- 第 4 步：创建规则重放窗口表。
-- 系统根据分钟桶和当时适用的规则生成重放窗口，处理结果与正常实时窗口分开记录。
CREATE TABLE analysis_rule_replay_window (
  id VARCHAR2(36) NOT NULL,
  source_bucket_id VARCHAR2(36) NOT NULL,
  rule_id VARCHAR2(128) NOT NULL,
  rule_version VARCHAR2(64) NOT NULL,
  window_start TIMESTAMP NOT NULL,
  window_end TIMESTAMP NOT NULL,
  requested_generation BIGINT DEFAULT 1 NOT NULL,
  claimed_generation BIGINT DEFAULT 0 NOT NULL,
  processed_generation BIGINT DEFAULT 0 NOT NULL,
  status VARCHAR2(16) DEFAULT 'PENDING' NOT NULL,
  attempt_count INTEGER DEFAULT 0 NOT NULL,
  input_count BIGINT DEFAULT 0 NOT NULL,
  output_count BIGINT DEFAULT 0 NOT NULL,
  fencing_token BIGINT DEFAULT 0 NOT NULL,
  lease_owner VARCHAR2(128),
  lease_expires_at TIMESTAMP,
  next_retry_at TIMESTAMP,
  last_error_code VARCHAR2(128),
  last_error_summary VARCHAR2(2000),
  started_at TIMESTAMP,
  finished_at TIMESTAMP,
  created_at TIMESTAMP DEFAULT SYSDATE NOT NULL,
  updated_at TIMESTAMP DEFAULT SYSDATE NOT NULL,
  CONSTRAINT pk_analysis_rule_replay PRIMARY KEY(id),
  CONSTRAINT fk_analysis_rule_replay_bucket FOREIGN KEY(source_bucket_id)
    REFERENCES analysis_late_alarm_bucket(id),
  CONSTRAINT uk_analysis_rule_replay
    UNIQUE(rule_id,rule_version,window_start,window_end),
  CONSTRAINT ck_analysis_rule_replay_status
    CHECK(status IN ('PENDING','RUNNING','COMPLETED','FAILED','BLOCKED')),
  CONSTRAINT ck_analysis_rule_replay_gen
    CHECK(requested_generation>=claimed_generation
      AND claimed_generation>=processed_generation
      AND processed_generation>=0),
  CONSTRAINT ck_analysis_rule_replay_count
    CHECK(attempt_count>=0 AND input_count>=0 AND output_count>=0 AND fencing_token>=0),
  CONSTRAINT ck_analysis_rule_replay_window CHECK(window_end>window_start),
  CONSTRAINT ck_analysis_rule_replay_lease
    CHECK((lease_owner IS NULL AND lease_expires_at IS NULL)
      OR (lease_owner IS NOT NULL AND lease_expires_at IS NOT NULL))
);

CREATE INDEX idx_analysis_rule_replay_due
  ON analysis_rule_replay_window(status,next_retry_at,lease_expires_at,window_start);

-- 第 5 步：写入数据字典注释，方便后续运维排查。
COMMENT ON COLUMN device_collect_api_config.scheduler_priority
  IS '到期时间相同时的竞争优先级，数值越大越先调度；逾期更久的任务优先';
COMMENT ON TABLE analysis_late_alarm_bucket
  IS '标准化告警同事务写入的事件分钟 outbox；代数防止运行期间新通知丢失';
COMMENT ON COLUMN analysis_late_alarm_bucket.last_observed_at
  IS '本事件分钟最近一次事务内观察时间，仅供审计，不代表事务提交时间';
COMMENT ON TABLE analysis_rule_replay_window
  IS '迟到告警影响的独立规则重放窗口；不修改正常 RULE checkpoint';
COMMENT ON COLUMN analysis_rule_replay_window.rule_version
  IS '必须与正常 analysis_checkpoint 的规则语义版本完全一致';
COMMENT ON COLUMN analysis_rule_replay_window.processed_generation
  IS '已完整重放的请求代数；小于 requested_generation 时必须再次执行';

-- 提交本脚本中的优先级更新。
COMMIT;

-- 执行完成后，请立即执行 06-fairness-late-replay-verify.sql。