"""查标第 1 步（m3-plan §5）：每条清单项的检查结论（C9），投标分册类型（C8）。

- check_item_result：每次检查对每条参与检查的清单项留一行结论，「已响应」也留（红线 1、2）。
  问题只为没响应好的条目生成；复查时按 cache_key 复用上一次的结论（C2）。
- source_document.volume_kind：分册类型只用来排序检索候选和填写「找过哪些分册」，不限制检索范围。

Revision ID: 0005
"""

from __future__ import annotations

from alembic import op

revision = "0005"
down_revision = "0004"


def upgrade() -> None:
    op.get_bind().exec_driver_sql("""
ALTER TABLE source_document
  ADD COLUMN volume_kind text
  CHECK (volume_kind IN ('whole', 'qualification', 'commercial', 'technical', 'price', 'other'));

CREATE TABLE check_item_result (
  tenant_id           uuid NOT NULL,
  check_run_id        uuid NOT NULL,
  checklist_item_id   uuid NOT NULL,
  verdict             text NOT NULL
                      CHECK (verdict IN ('responded', 'not_found', 'negative_deviation', 'suspected_unmet',
                                         'no_value', 'undetermined', 'scanned')),
  layer               text NOT NULL CHECK (layer IN ('deviation_table', 'rule_compare', 'model', 'retrieval')),
  evidence_status     text NOT NULL CHECK (evidence_status IN ('verified', 'unverified', 'none')),
  reason_code         text,                             -- 证据没通过、漏答、模型错误等（与读标原因码同一套写法）
  bid_citation_ids    uuid[] NOT NULL DEFAULT '{}',     -- 出处不可变，随项目级联删除
  detail              jsonb NOT NULL DEFAULT '{}',      -- 要求值 / 响应值、模型指的页码、找过哪些分册
  group_key           text,                             -- 重复条目分组（C5）
  cache_key           bytea,                            -- 清单项内容 + 分册版本 + 提示词版本（C2）
  reused_from_run_id  uuid,
  created_at          timestamptz NOT NULL DEFAULT now(),
  PRIMARY KEY (tenant_id, check_run_id, checklist_item_id),
  -- 没有校验通过的证据，不能判为「已响应」（架构 §3.6）
  CHECK (verdict <> 'responded' OR evidence_status = 'verified'),
  FOREIGN KEY (tenant_id, check_run_id) REFERENCES check_run (tenant_id, id) ON DELETE CASCADE,
  FOREIGN KEY (tenant_id, checklist_item_id) REFERENCES checklist_item (tenant_id, id) ON DELETE CASCADE,
  FOREIGN KEY (tenant_id, reused_from_run_id) REFERENCES check_run (tenant_id, id)
    ON DELETE SET NULL (reused_from_run_id)
);
CREATE INDEX ON check_item_result (tenant_id, cache_key) WHERE cache_key IS NOT NULL;

ALTER TABLE check_item_result ENABLE ROW LEVEL SECURITY;
ALTER TABLE check_item_result FORCE ROW LEVEL SECURITY;
CREATE POLICY tenant_isolation ON check_item_result
  USING (tenant_id = current_tenant()) WITH CHECK (tenant_id = current_tenant());
""")


def downgrade() -> None:
    op.get_bind().exec_driver_sql("DROP TABLE check_item_result; ALTER TABLE source_document DROP COLUMN volume_kind;")