-- memind_user_model v0 — User Model Service (UMS)
-- 库：memind_user_model（与 meinput、goose 并列，独立 RDS 库或 schema）
-- UMS 只 ingest Evidence Envelope v1，不读 meinput.mi_* 表。

-- ── L0: 原始 Evidence（immutable append）────────────────────────────────────

CREATE TABLE IF NOT EXISTS um_evidence (
  evidence_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  source_type VARCHAR(32) NOT NULL,
  source_ref VARCHAR(512) NOT NULL,
  evidence_type VARCHAR(64) NOT NULL,
  occurred_at DATETIME(3) NOT NULL,
  received_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  content_hash CHAR(64) NOT NULL,
  schema_version INT NOT NULL DEFAULT 1,
  privacy_level VARCHAR(32) NOT NULL DEFAULT 'normal',
  payload_json JSON NOT NULL,
  UNIQUE KEY uq_um_evidence_content (user_id, content_hash),
  KEY idx_um_evidence_user_time (user_id, occurred_at DESC),
  KEY idx_um_evidence_source (user_id, source_type, occurred_at DESC)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ── L1: Signal（观察到了什么 — 确定性，可复算）────────────────────────────

CREATE TABLE IF NOT EXISTS um_signals (
  signal_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  signal_type VARCHAR(64) NOT NULL,
  -- 例：term_frequency | app_usage | entity_mention | rhythm_hour | segment_count
  dimension_key VARCHAR(128) NOT NULL,
  -- 例：term:MeInput | app:com.tencent.xin | hour:15
  window_start DATETIME(3) NOT NULL,
  window_end DATETIME(3) NOT NULL,
  value_json JSON NOT NULL,
  -- 例：{"count":126,"chars":8400,"distinct_days":7}
  evidence_ids JSON NOT NULL,
  -- 指向 um_evidence.evidence_id 数组
  computed_at BIGINT NOT NULL,
  content_hash CHAR(64) NOT NULL,
  UNIQUE KEY uq_um_signal (user_id, signal_type, dimension_key, window_start, window_end, content_hash),
  KEY idx_um_signals_user_window (user_id, window_end DESC)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ── L2: Candidate（系统推断了什么 — hypothesis）────────────────────────────

CREATE TABLE IF NOT EXISTS um_candidates (
  candidate_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  candidate_type VARCHAR(64) NOT NULL,
  -- project | interest | preference | relation | routine | focus
  hypothesis_json JSON NOT NULL,
  -- 例：{"type":"project","name":"MeInput","role":"active"}
  status ENUM(
    'observed',
    'open',
    'accepted',
    'rejected',
    'conflicted',
    'revoked',
    'memory_eligible',
    'memory_promoted'
  ) NOT NULL DEFAULT 'observed',
  promotion_score DECIMAL(6,4) NOT NULL DEFAULT 0,
  confidence DECIMAL(6,4) NOT NULL DEFAULT 0,
  signal_ids JSON NOT NULL,
  evidence_ids JSON NOT NULL,
  first_seen_at DATETIME(3) NOT NULL,
  last_seen_at DATETIME(3) NOT NULL,
  version INT NOT NULL DEFAULT 1,
  parent_candidate_id CHAR(36) NULL,
  conflict_with_id CHAR(36) NULL,
  created_at BIGINT NOT NULL,
  updated_at BIGINT NOT NULL,
  KEY idx_um_candidates_user_status (user_id, status, last_seen_at DESC),
  KEY idx_um_candidates_user_type (user_id, candidate_type, promotion_score DESC)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ── L3: User Model Graph ───────────────────────────────────────────────────

CREATE TABLE IF NOT EXISTS um_entities (
  entity_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  entity_type VARCHAR(32) NOT NULL,
  -- person | project | topic | tool | preference_dim | role
  canonical_name VARCHAR(256) NOT NULL,
  aliases_json JSON NULL,
  status ENUM('active', 'archived', 'revoked') NOT NULL DEFAULT 'active',
  created_at BIGINT NOT NULL,
  updated_at BIGINT NOT NULL,
  UNIQUE KEY uq_um_entity (user_id, entity_type, canonical_name(128))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS um_attributes (
  attribute_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  entity_id CHAR(36) NULL,
  attr_key VARCHAR(128) NOT NULL,
  value_json JSON NOT NULL,
  confidence DECIMAL(6,4) NOT NULL,
  decay_halflife_days INT NOT NULL DEFAULT 90,
  effective_weight DECIMAL(6,4) NOT NULL DEFAULT 1,
  evidence_ids JSON NOT NULL,
  candidate_id CHAR(36) NULL,
  first_seen_at DATETIME(3) NOT NULL,
  last_seen_at DATETIME(3) NOT NULL,
  status ENUM('active', 'superseded', 'revoked') NOT NULL DEFAULT 'active',
  version INT NOT NULL DEFAULT 1,
  content_hash CHAR(64) NOT NULL,
  KEY idx_um_attr_user_key (user_id, attr_key, status, effective_weight DESC),
  CONSTRAINT fk_um_attr_entity FOREIGN KEY (entity_id) REFERENCES um_entities(entity_id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS um_relations (
  relation_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  from_entity_id CHAR(36) NOT NULL,
  rel_type VARCHAR(64) NOT NULL,
  to_entity_id CHAR(36) NOT NULL,
  confidence DECIMAL(6,4) NOT NULL,
  evidence_ids JSON NOT NULL,
  candidate_id CHAR(36) NULL,
  first_seen_at DATETIME(3) NOT NULL,
  last_seen_at DATETIME(3) NOT NULL,
  status ENUM('active', 'superseded', 'revoked') NOT NULL DEFAULT 'active',
  KEY idx_um_rel_user (user_id, from_entity_id, rel_type),
  CONSTRAINT fk_um_rel_from FOREIGN KEY (from_entity_id) REFERENCES um_entities(entity_id) ON DELETE CASCADE,
  CONSTRAINT fk_um_rel_to FOREIGN KEY (to_entity_id) REFERENCES um_entities(entity_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ── L4: Profile Projection（Graph 的结构化投影，非 narrative）──────────────

CREATE TABLE IF NOT EXISTS um_profile_versions (
  profile_version INT NOT NULL,
  user_id CHAR(36) NOT NULL,
  structured_json JSON NOT NULL,
  content_hash CHAR(64) NOT NULL,
  parent_version INT NULL,
  materialize_reason VARCHAR(64) NOT NULL,
  -- daily_consolidation | candidate_accepted | threshold | manual
  created_at BIGINT NOT NULL,
  status ENUM('active', 'superseded', 'revoked') NOT NULL DEFAULT 'active',
  PRIMARY KEY (user_id, profile_version)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ── L5: Agent Snapshot（Profile Projection 的渲染视图，Session 加载）────────

CREATE TABLE IF NOT EXISTS um_profile_snapshots (
  snapshot_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  projection VARCHAR(32) NOT NULL DEFAULT 'default',
  -- default | coding | schedule
  profile_version INT NOT NULL,
  fast_revision INT NOT NULL DEFAULT 0,
  snapshot_json JSON NOT NULL,
  byte_size INT NOT NULL,
  content_hash CHAR(64) NOT NULL,
  created_at BIGINT NOT NULL,
  expires_at BIGINT NULL,
  status ENUM('active', 'superseded', 'revoked') NOT NULL DEFAULT 'active',
  KEY idx_um_snapshot_user_proj (user_id, projection, status, created_at DESC)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ── 辅助：ingest 游标（按 user + source_type）────────────────────────────────

CREATE TABLE IF NOT EXISTS um_ingest_cursors (
  user_id CHAR(36) NOT NULL,
  source_type VARCHAR(32) NOT NULL,
  cursor_value VARCHAR(256) NOT NULL,
  updated_at BIGINT NOT NULL,
  PRIMARY KEY (user_id, source_type)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ── v0.1 预留：Memory lineage（暂不写入，schema 先冻结）────────────────────

CREATE TABLE IF NOT EXISTS um_memory_promotions (
  promotion_id CHAR(36) PRIMARY KEY,
  user_id CHAR(36) NOT NULL,
  candidate_id CHAR(36) NOT NULL,
  attribute_id CHAR(36) NULL,
  memind_candidate_id VARCHAR(64) NULL,
  content_hash CHAR(64) NOT NULL,
  promoted_at BIGINT NOT NULL,
  revoked_at BIGINT NULL,
  status ENUM('promoted', 'revoked') NOT NULL DEFAULT 'promoted',
  KEY idx_um_promo_user (user_id, status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;