USE model_operations;

CREATE TABLE IF NOT EXISTS ops_monitor_batches (
  batch_id CHAR(26) NOT NULL,
  workspace_id CHAR(26) NOT NULL COMMENT '逻辑引用 model_platform.workspaces',
  source_system VARCHAR(64) NOT NULL DEFAULT 'model_platform',
  source_batch_no VARCHAR(128) NOT NULL COMMENT '来源方幂等批次号',
  monitor_month DATE NOT NULL COMMENT '固定存当月1日',
  revision_no INT NOT NULL DEFAULT 1,
  supersedes_batch_id CHAR(26) NULL COMMENT '逻辑引用上一修订批次',
  batch_status VARCHAR(24) NOT NULL DEFAULT 'writing'
    COMMENT 'writing/published/failed/superseded',
  expected_model_count INT NOT NULL DEFAULT 0,
  written_model_count INT NOT NULL DEFAULT 0,
  feature_row_count BIGINT NOT NULL DEFAULT 0,
  distribution_row_count BIGINT NOT NULL DEFAULT 0,
  checksum_sha256 CHAR(64) NULL,
  generated_at DATETIME(3) NULL,
  published_at DATETIME(3) NULL,
  published_by CHAR(26) NULL COMMENT '逻辑引用 model_platform.users',
  failed_reason VARCHAR(2000) NULL,
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3)
    ON UPDATE CURRENT_TIMESTAMP(3),
  is_deleted TINYINT(1) NOT NULL DEFAULT 0,
  deleted_at DATETIME(3) NULL,
  PRIMARY KEY (batch_id),
  UNIQUE KEY uk_ops_monitor_batches_source_no (
    workspace_id, source_system, source_batch_no
  ),
  UNIQUE KEY uk_ops_monitor_batches_revision (
    workspace_id, source_system, monitor_month, revision_no
  ),
  KEY fk_ops_monitor_batches_supersedes (supersedes_batch_id),
  KEY idx_ops_monitor_batches_publish (
    workspace_id, batch_status, monitor_month, revision_no
  )
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
  COMMENT='月度监控写入批次与发布门闩；模型平台可受控直写';

CREATE TABLE IF NOT EXISTS ops_monitor_results (
  monitor_result_id CHAR(26) NOT NULL,
  workspace_id CHAR(26) NOT NULL COMMENT '逻辑引用 model_platform.workspaces',
  batch_id CHAR(26) NOT NULL COMMENT '逻辑引用 ops_monitor_batches',
  model_instance_id CHAR(26) NOT NULL COMMENT '逻辑引用 ops_model_instances',
  model_version_id CHAR(26) NOT NULL COMMENT '逻辑引用 ops_model_versions',
  monitor_month DATE NOT NULL COMMENT '固定存当月1日',
  source_result_ref VARCHAR(128) NULL,
  ranking_result VARCHAR(24) NULL
    COMMENT 'matched/unmatched/not_applicable',
  ks_value DECIMAL(12,8) NULL COMMENT '0-1比率',
  psi_value DECIMAL(12,8) NULL COMMENT '0-1比率',
  sample_count BIGINT NULL,
  good_count BIGINT NULL,
  bad_count BIGINT NULL,
  source_result_json JSON NULL COMMENT '尚未结构化的可追溯源字段',
  source_calculated_at DATETIME(3) NULL,
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  is_deleted TINYINT(1) NOT NULL DEFAULT 0,
  deleted_at DATETIME(3) NULL,
  PRIMARY KEY (monitor_result_id),
  UNIQUE KEY uk_ops_monitor_results_batch_model (
    batch_id, model_instance_id
  ),
  KEY fk_ops_monitor_results_batch (batch_id),
  KEY fk_ops_monitor_results_model (model_instance_id),
  KEY fk_ops_monitor_results_version (model_version_id),
  KEY idx_ops_monitor_results_month (
    workspace_id, monitor_month, model_instance_id
  ),
  CONSTRAINT chk_ops_monitor_results_ks
    CHECK (ks_value IS NULL OR (ks_value >= 0 AND ks_value <= 1)),
  CONSTRAINT chk_ops_monitor_results_psi
    CHECK (psi_value IS NULL OR psi_value >= 0)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
  COMMENT='单模型单月原始监控结果；发布后不可更新';

CREATE TABLE IF NOT EXISTS ops_monitor_feature_metrics (
  feature_metric_id CHAR(26) NOT NULL,
  monitor_result_id CHAR(26) NOT NULL COMMENT '逻辑引用 ops_monitor_results',
  feature_code VARCHAR(128) NOT NULL,
  feature_name VARCHAR(200) NOT NULL,
  iv_value DECIMAL(12,8) NULL,
  previous_iv_value DECIMAL(12,8) NULL,
  iv_drop_rate DECIMAL(12,8) NULL COMMENT '0-1比率',
  csi_value DECIMAL(12,8) NULL,
  previous_csi_value DECIMAL(12,8) NULL,
  csi_rise_rate DECIMAL(12,8) NULL COMMENT '0-1比率',
  ks_contribution_change DECIMAL(12,8) NULL,
  psi_contribution_change DECIMAL(12,8) NULL,
  source_metric_json JSON NULL,
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  is_deleted TINYINT(1) NOT NULL DEFAULT 0,
  deleted_at DATETIME(3) NULL,
  PRIMARY KEY (feature_metric_id),
  UNIQUE KEY uk_ops_feature_metrics_result_feature (
    monitor_result_id, feature_code
  ),
  KEY fk_ops_feature_metrics_result (monitor_result_id),
  KEY idx_ops_feature_metrics_iv_drop (monitor_result_id, iv_drop_rate),
  KEY idx_ops_feature_metrics_csi_rise (monitor_result_id, csi_rise_rate)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
  COMMENT='单月特征级 IV/CSI 与贡献变化；发布后不可更新';

CREATE TABLE IF NOT EXISTS ops_monitor_distributions (
  distribution_id CHAR(26) NOT NULL,
  monitor_result_id CHAR(26) NOT NULL COMMENT '逻辑引用 ops_monitor_results',
  dimension_type VARCHAR(24) NOT NULL COMMENT 'score_band/feature_bin',
  feature_code VARCHAR(128) NOT NULL DEFAULT '' COMMENT '评分分箱时为空串',
  feature_name VARCHAR(200) NULL,
  bin_order INT NOT NULL,
  bin_code VARCHAR(128) NOT NULL,
  bin_label VARCHAR(255) NOT NULL,
  reference_period_label VARCHAR(64) NULL,
  reference_count BIGINT NULL,
  reference_share DECIMAL(12,8) NULL COMMENT '0-1比率',
  current_count BIGINT NULL,
  current_share DECIMAL(12,8) NULL COMMENT '0-1比率',
  good_count BIGINT NULL,
  bad_count BIGINT NULL,
  bad_rate DECIMAL(12,8) NULL COMMENT '0-1比率',
  psi_component DECIMAL(12,8) NULL,
  csi_component DECIMAL(12,8) NULL,
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  is_deleted TINYINT(1) NOT NULL DEFAULT 0,
  deleted_at DATETIME(3) NULL,
  PRIMARY KEY (distribution_id),
  UNIQUE KEY uk_ops_distributions_bin (
    monitor_result_id, dimension_type, feature_code, bin_order
  ),
  KEY fk_ops_distributions_result (monitor_result_id),
  KEY idx_ops_distributions_feature (
    monitor_result_id, feature_code, bin_order
  )
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
  COMMENT='排序性评分分箱及特征分布；发布后不可更新';

CREATE OR REPLACE VIEW v_ops_current_monitor_results AS
SELECT result_row.*
FROM ops_monitor_results AS result_row
JOIN ops_monitor_batches AS batch_row
  ON batch_row.batch_id = result_row.batch_id
JOIN (
  SELECT
    workspace_id,
    source_system,
    monitor_month,
    MAX(revision_no) AS revision_no
  FROM ops_monitor_batches
  WHERE batch_status = 'published' AND is_deleted = 0
  GROUP BY workspace_id, source_system, monitor_month
) AS latest
  ON latest.workspace_id = batch_row.workspace_id
 AND latest.source_system = batch_row.source_system
 AND latest.monitor_month = batch_row.monitor_month
 AND latest.revision_no = batch_row.revision_no
WHERE result_row.is_deleted = 0
  AND batch_row.batch_status = 'published'
  AND batch_row.is_deleted = 0;