-- Existing effective style is imported, not re-distilled or falsely approved.
CREATE TABLE IF NOT EXISTS yawan_legacy_agent_persona_mappings (
  tenant_id BIGINT NOT NULL,
  agent_id VARCHAR(36) NOT NULL,
  source_system TEXT NOT NULL,
  source_organization_id BIGINT NOT NULL,
  source_id BIGINT NOT NULL,
  owner_id VARCHAR(36) NOT NULL,
  digital_human_id VARCHAR(36) NOT NULL,
  version_id VARCHAR(36) NOT NULL,
  binding_id VARCHAR(36) NOT NULL,
  source_persona JSONB NOT NULL,
  source_snapshot_sha256 VARCHAR(64) NOT NULL,
  migrated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  PRIMARY KEY (tenant_id, agent_id),
  UNIQUE (source_system, source_organization_id, source_id, tenant_id)
);

DO $legacy_persona$
DECLARE
  item RECORD;
  human_id TEXT;
  version_id TEXT;
  binding_id TEXT;
  seed TEXT;
  prompt TEXT;
  persona_lines TEXT;
  globally_visible BOOLEAN;
BEGIN
  IF to_regclass('yawan_legacy_asset_mappings') IS NULL THEN
    RETURN;
  END IF;
  FOR item IN
    SELECT m.*, a.created_by, a.name, a.avatar, a.config, a.visibility
    FROM yawan_legacy_asset_mappings m
    JOIN custom_agents a ON a.tenant_id = m.target_tenant_id AND a.id = m.target_id
    WHERE m.source_system = 'yawan-workbench' AND m.source_organization_id = 1
      AND m.source_kind = 'agent' AND m.source_snapshot->>'status' = 'active'
      AND m.source_snapshot->'persona_json' IS NOT NULL
      AND m.source_snapshot->'persona_json' <> '{}'::jsonb
      AND COALESCE(m.source_snapshot->>'digital_human_id', '') IN ('', '0')
      AND a.deleted_at IS NULL AND COALESCE(a.created_by, '') <> ''
      AND NOT EXISTS (SELECT 1 FROM yawan_legacy_agent_persona_mappings p
        WHERE p.tenant_id = a.tenant_id AND p.agent_id = a.id)
      AND NOT EXISTS (SELECT 1 FROM digital_human_bindings b
        WHERE b.tenant_id = a.tenant_id AND b.agent_id = a.id)
    FOR UPDATE OF a
  LOOP
    IF jsonb_typeof(item.source_snapshot->'persona_json') <> 'object' THEN
      RAISE EXCEPTION 'Legacy Agent persona must be an object';
    END IF;
    IF EXISTS (SELECT 1 FROM jsonb_each(item.source_snapshot->'persona_json') p
      WHERE jsonb_typeof(p.value) <> 'string' OR length(p.value #>> '{}') > 6000
        OR p.key NOT IN ('persona_name', 'identity', 'tone', 'pace', 'vocab', 'taboo',
          'opening_habit', 'emotion_style', 'interaction', 'expertise_border', 'sample_excerpt',
          'writing_style', 'narrative_style', 'thinking_style', 'audience_profile', 'hook_patterns',
          'pain_point_hooks', 'itch_point_hooks', 'sales_logic', 'cta_transition',
          'expression_prompt', 'expression_rules'))
      OR (SELECT COALESCE(sum(length(value)), 0) FROM jsonb_each_text(item.source_snapshot->'persona_json')) > 30000 THEN
      RAISE EXCEPTION 'Legacy Agent persona requires explicit field review';
    END IF;
    IF NOT EXISTS (SELECT 1 FROM jsonb_each_text(item.source_snapshot->'persona_json') p WHERE btrim(p.value) <> '') THEN
      CONTINUE;
    END IF;
    seed := item.source_system || ':' || item.source_organization_id || ':agent-persona:' || item.target_tenant_id || ':' || item.source_id;
    human_id := md5(seed || ':human')::uuid::text;
    version_id := md5(seed || ':version')::uuid::text;
    binding_id := md5(seed || ':binding')::uuid::text;
    -- A preexisting deterministic target is a conflict, never permission to overwrite it.
    IF EXISTS (SELECT 1 FROM digital_humans WHERE id = human_id)
      OR EXISTS (SELECT 1 FROM digital_human_versions WHERE id = version_id)
      OR EXISTS (SELECT 1 FROM digital_human_bindings WHERE id = binding_id) THEN
      RAISE EXCEPTION 'Legacy Agent persona target already exists without migration provenance';
    END IF;
    SELECT string_agg(p.key || '：' || btrim(p.value) || E'\n', '' ORDER BY p.key COLLATE "C")
      INTO persona_lines FROM jsonb_each_text(item.source_snapshot->'persona_json') p
      WHERE btrim(p.value) <> '';
    prompt := COALESCE(item.config->>'system_prompt', '') || E'\n\n<!-- weknora:digital-human:' || human_id || E':start -->\n'
      || '## 旧配置迁入数字人（未重新蒸馏）：' || item.name || E'（v1）\n'
      || E'以下档案仅约束表达方式，不能替代任务目标、事实来源、工具权限或上文衔接约束。不得把档案样本当作新的事实依据。\n'
      || persona_lines || '<!-- weknora:digital-human:' || human_id || ':end -->';
    INSERT INTO digital_humans (id, tenant_id, owner_id, name, description, avatar, model_id,
      status, latest_version, active_version, primary_agent_id)
    VALUES (human_id, item.target_tenant_id, item.created_by, item.name,
      '从原 Agent 的有效风格配置迁入，未重新蒸馏或审核。', COALESCE(item.avatar, ''),
      COALESCE(item.config->>'model_id', ''), 'active', 1, 1, item.target_id);
    INSERT INTO digital_human_versions (id, tenant_id, owner_id, digital_human_id, number,
      status, persona, sources, advice, review_note, reviewed_at)
    VALUES (version_id, item.target_tenant_id, item.created_by, human_id, 1, 'imported',
      item.source_snapshot->'persona_json', '[]', '', '', NULL);
    INSERT INTO digital_human_bindings (id, tenant_id, owner_id, digital_human_id, agent_id, base_prompt, applied_version)
    VALUES (binding_id, item.target_tenant_id, item.created_by, human_id, item.target_id,
      COALESCE(item.config->>'system_prompt', ''), 1);
    UPDATE custom_agents SET config = jsonb_set(config::jsonb, '{system_prompt}', to_jsonb(prompt))
      WHERE tenant_id = item.target_tenant_id AND id = item.target_id;
    SELECT COALESCE((SELECT global FROM workbench_access_publications
      WHERE tenant_id = item.target_tenant_id AND kind = 'agents' AND resource_id = item.target_id),
      item.visibility = 'global') INTO globally_visible;
    INSERT INTO workbench_access_publications (tenant_id, kind, resource_id, global)
    VALUES (item.target_tenant_id, 'digital-humans', human_id, globally_visible);
    INSERT INTO workbench_access_grants (tenant_id, kind, resource_id, user_id)
    SELECT tenant_id, 'digital-humans', human_id, user_id FROM workbench_access_grants
      WHERE tenant_id = item.target_tenant_id AND kind = 'agents' AND resource_id = item.target_id;
    INSERT INTO yawan_legacy_agent_persona_mappings (tenant_id, agent_id, source_system,
      source_organization_id, source_id, owner_id, digital_human_id, version_id, binding_id,
      source_persona, source_snapshot_sha256)
    VALUES (item.target_tenant_id, item.target_id, item.source_system, item.source_organization_id,
      item.source_id, item.created_by, human_id, version_id, binding_id,
      item.source_snapshot->'persona_json', item.source_snapshot_sha256);
  END LOOP;
END $legacy_persona$;