package docrevision

import (
	"context"
	"fmt"
	"time"

	"github.com/jackc/pgx/v5/pgxpool"
)

// SeedContentSnapshotForTest 以生产同构方式写入内容快照（本模块所有的
// document_content_blobs + document_snapshots）并返回快照 ID。
//
// 用途：集成测试构造合法的 送审→审核→批准 链——账本封快照正是本模块的
// 生产行为。document_records 上的 head/review 指针回填归 docgov
//（GovernanceEngine.FreezeHeadSnapshotForTest），两者配合使用。
func SeedContentSnapshotForTest(ctx context.Context, pool *pgxpool.Pool, docID string, actorID int64, content string) (int64, error) {
	if pool == nil {
		return 0, fmt.Errorf("docrevision: SeedContentSnapshotForTest requires a pool")
	}
	sha := fmt.Sprintf("sha_seed_%d", time.Now().UnixNano())
	var snapID int64
	err := pool.QueryRow(ctx, `
		WITH blob AS (
			INSERT INTO document_content_blobs (content_sha256, content_markdown, byte_size, created_at)
			VALUES ($2, $3, $4, now())
			RETURNING content_sha256
		)
		INSERT INTO document_snapshots (doc_id, content_sha256, actor_user_id, actor_snapshot, source_kind, created_at)
		SELECT $1::text, blob.content_sha256, $5, '[]'::jsonb, 'human', now() FROM blob
		RETURNING id
	`, docID, sha, content, len(content), actorID).Scan(&snapID)
	if err != nil {
		return 0, fmt.Errorf("docrevision: seed snapshot: %w", err)
	}
	return snapID, nil
}