-- Frozen golden datasets and explicit rule-acceptance evidence.
-- This migration never activates a rule or changes an asset, review decision, publication, or index.

CREATE TABLE IF NOT EXISTS `aihr_golden_dataset` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `tenant_id` varchar(20) NOT NULL,
  `dataset_code` varchar(64) NOT NULL,
  `version_no` int NOT NULL,
  `name` varchar(120) NOT NULL,
  `description` varchar(1000) DEFAULT NULL,
  `status` varchar(20) NOT NULL DEFAULT 'DRAFT',
  `sample_count` int NOT NULL DEFAULT 0,
  `content_hash` char(64) DEFAULT NULL,
  `owner_id` bigint NOT NULL,
  `frozen_by` bigint DEFAULT NULL,
  `frozen_time` datetime DEFAULT NULL,
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_aihr_golden_dataset_version` (`tenant_id`, `dataset_code`, `version_no`),
  KEY `idx_aihr_golden_dataset_status` (`tenant_id`, `status`, `update_time`),
  CONSTRAINT `ck_aihr_golden_dataset_status` CHECK (`status` IN ('DRAFT','FROZEN','RETIRED')),
  CONSTRAINT `ck_aihr_golden_dataset_sample_count` CHECK (`sample_count` >= 0)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='Immutable versions of human-labeled rule calibration datasets';

CREATE TABLE IF NOT EXISTS `aihr_golden_sample` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `tenant_id` varchar(20) NOT NULL,
  `dataset_id` bigint NOT NULL,
  `sample_key` varchar(100) NOT NULL,
  `risk_class` varchar(20) NOT NULL,
  `expected_decision` varchar(20) NOT NULL,
  `reason_codes_json` json DEFAULT NULL,
  `evidence_ref` varchar(500) NOT NULL,
  `asset_id` bigint DEFAULT NULL,
  `version_id` bigint DEFAULT NULL,
  `created_by` bigint NOT NULL,
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_aihr_golden_sample` (`tenant_id`, `dataset_id`, `sample_key`),
  KEY `idx_aihr_golden_sample_risk` (`tenant_id`, `dataset_id`, `risk_class`, `id`),
  CONSTRAINT `ck_aihr_golden_sample_risk` CHECK (`risk_class` IN ('LOW','MEDIUM','HIGH','CRITICAL')),
  CONSTRAINT `ck_aihr_golden_sample_decision` CHECK (`expected_decision` IN ('PASS','REVIEW','BLOCK'))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='Human-labeled samples belonging to a versioned golden dataset';

CREATE TABLE IF NOT EXISTS `aihr_rule_golden_evaluation` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `tenant_id` varchar(20) NOT NULL,
  `evaluation_id` bigint NOT NULL,
  `dataset_id` bigint NOT NULL,
  `golden_sample_id` bigint NOT NULL,
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_aihr_rule_golden_evaluation` (`tenant_id`, `evaluation_id`),
  KEY `idx_aihr_rule_golden_sample` (`tenant_id`, `golden_sample_id`, `evaluation_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='Traceable link from a shadow evaluation to its frozen golden label';

CREATE TABLE IF NOT EXISTS `aihr_rule_acceptance_profile` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `tenant_id` varchar(20) NOT NULL,
  `rule_id` bigint NOT NULL,
  `version_no` int NOT NULL,
  `risk_class` varchar(20) NOT NULL,
  `min_total_samples` int NOT NULL,
  `min_golden_samples` int NOT NULL,
  `min_reviewed_samples` int NOT NULL,
  `min_agreement_rate` decimal(7,6) NOT NULL,
  `max_false_allow_rate` decimal(7,6) NOT NULL,
  `max_false_block_rate` decimal(7,6) NOT NULL,
  `min_review_coverage_rate` decimal(7,6) NOT NULL,
  `status` varchar(20) NOT NULL DEFAULT 'DRAFT',
  `owner_id` bigint NOT NULL,
  `freeze_reason` varchar(500) DEFAULT NULL,
  `frozen_by` bigint DEFAULT NULL,
  `frozen_time` datetime DEFAULT NULL,
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_aihr_rule_acceptance_profile` (`tenant_id`, `rule_id`, `version_no`),
  KEY `idx_aihr_rule_acceptance_status` (`tenant_id`, `rule_id`, `status`, `version_no`),
  CONSTRAINT `ck_aihr_rule_acceptance_risk` CHECK (`risk_class` IN ('LOW','MEDIUM','HIGH','CRITICAL')),
  CONSTRAINT `ck_aihr_rule_acceptance_status` CHECK (`status` IN ('DRAFT','FROZEN','RETIRED')),
  CONSTRAINT `ck_aihr_rule_acceptance_counts` CHECK (
    `min_total_samples` >= 1 AND `min_golden_samples` >= 1 AND `min_reviewed_samples` >= 1),
  CONSTRAINT `ck_aihr_rule_acceptance_rates` CHECK (
    `min_agreement_rate` BETWEEN 0 AND 1 AND
    `max_false_allow_rate` BETWEEN 0 AND 1 AND
    `max_false_block_rate` BETWEEN 0 AND 1 AND
    `min_review_coverage_rate` BETWEEN 0 AND 1)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='Frozen, risk-specific evidence thresholds for a processing-rule version';