package postgres

import (
	"context"
	"errors"
	"os"
	"testing"
	"time"

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

	"knowledge-governance/internal/governance"
)

// 批量审核：逐条复用单条审核的写入路径，且**如实回报**哪几条当时不可审核
// （例如人工刚驳回过的那条不会被机器翻回去）。
func TestReviewPublicationsBatchDecidesEligibleAndReportsSkipped(t *testing.T) {
	databaseURL := isolatedIntegrationDatabaseURL(t, os.Getenv("TEST_DATABASE_URL"))
	if databaseURL == "" {
		t.Skip("TEST_DATABASE_URL is not set")
	}
	ctx := context.Background()
	pool, err := pgxpool.New(ctx, databaseURL)
	if err != nil {
		t.Fatal(err)
	}
	defer pool.Close()
	if err := ApplyMigrations(ctx, pool); err != nil {
		t.Fatal(err)
	}
	store := NewStore(pool)
	now := time.Date(2026, 10, 10, 15, 0, 0, 0, time.UTC)
	if _, err := pool.Exec(ctx, `INSERT INTO source_connections (id, source_type, name) VALUES ('conn-manual', 'manual', 'Manual')`); err != nil {
		t.Fatal(err)
	}
	insertReviewFixture(t, ctx, pool, 12, "tp-batch-a", now)
	insertReviewFixture(t, ctx, pool, 13, "tp-batch-b", now)
	insertReviewFixture(t, ctx, pool, 14, "tp-batch-c", now)
	// 人工先把 c 驳回：机器不得覆盖。
	if _, err := store.ReviewPublication(ctx, governance.ReviewPublicationRequest{
		PublicationID: "tp-batch-c", Decision: governance.ReviewRejected, DecidedVisibility: governance.VisibilityInternal,
		ReviewerRef: "admin", DecisionCode: "needs_correction", Now: now.Add(time.Minute),
	}); err != nil {
		t.Fatal(err)
	}

	// 人工发起的批量批准：可审核的写进去，不可审核的（这里是根本不存在的条目）如实跳报。
	// 注意 c 也在其中——人工当然可以推翻自己先前的驳回，那是人工决策，不是机器覆盖。
	result, err := store.ReviewPublicationsBatch(ctx, governance.ReviewPublicationsBatchRequest{
		PublicationIDs: []string{"tp-batch-a", "tp-batch-b", "tp-batch-missing"},
		Decision:       governance.ReviewApproved, DecidedVisibility: governance.VisibilityInternal,
		ReviewerRef: "engineer-1", DecisionCode: "approved_for_release", Now: now.Add(2 * time.Minute),
	})
	if err != nil {
		t.Fatalf("ReviewPublicationsBatch() error = %v", err)
	}
	if result.Selected != 3 || result.Decided != 2 || result.Skipped != 1 {
		t.Fatalf("batch result = %#v", result)
	}
	if len(result.SkippedIDs) != 1 || result.SkippedIDs[0] != "tp-batch-missing" {
		t.Fatalf("skipped ids = %#v", result.SkippedIDs)
	}

	// 机器发起的批量批准：人工驳回过的那条必须被跳过（永远不覆盖人工结论）。
	systemResult, err := store.ReviewPublicationsBatch(ctx, governance.ReviewPublicationsBatchRequest{
		PublicationIDs: []string{"tp-batch-c"},
		Decision:       governance.ReviewApproved, DecidedVisibility: governance.VisibilityInternal,
		ReviewerRef: "system:auto", DecisionCode: "approved_for_release", Now: now.Add(3 * time.Minute),
	})
	if err != nil {
		t.Fatalf("system batch error = %v", err)
	}
	if systemResult.Decided != 0 || systemResult.Skipped != 1 {
		t.Fatalf("system batch must not override a human decision: %#v", systemResult)
	}
	var approvedCount int
	if err := pool.QueryRow(ctx, `SELECT COUNT(*)::integer FROM publication_reviews WHERE publication_id IN ('tp-batch-a','tp-batch-b') AND decision='approved' AND reviewer_ref='engineer-1'`).Scan(&approvedCount); err != nil {
		t.Fatal(err)
	}
	if approvedCount != 2 {
		t.Fatalf("approved reviews = %d, want 2", approvedCount)
	}
	// c 的人工驳回必须原样保留。
	var decision, reviewer string
	if err := pool.QueryRow(ctx, `SELECT decision, reviewer_ref FROM publication_reviews WHERE publication_id='tp-batch-c' ORDER BY created_at DESC, id DESC LIMIT 1`).Scan(&decision, &reviewer); err != nil {
		t.Fatal(err)
	}
	if decision != "rejected" || reviewer != "admin" {
		t.Fatalf("human decision was overwritten: %q by %q", decision, reviewer)
	}

	// 非法输入整批拒绝（含重复 id）。
	if _, err := store.ReviewPublicationsBatch(ctx, governance.ReviewPublicationsBatchRequest{
		PublicationIDs: []string{"tp-batch-a", "tp-batch-a"}, Decision: governance.ReviewApproved,
		DecidedVisibility: governance.VisibilityInternal, ReviewerRef: "engineer-1",
		DecisionCode: "approved_for_release", Now: now,
	}); !errors.Is(err, ErrInvalidPublicationReview) {
		t.Fatalf("duplicate ids error = %v, want ErrInvalidPublicationReview", err)
	}
}

// 建批即锁定：一次调用就该得到 sealed 批次（草稿态不再单独占一步），且锁定会逐项复核门禁。
func TestCreateReleaseBatchSealsImmediately(t *testing.T) {
	databaseURL := isolatedIntegrationDatabaseURL(t, os.Getenv("TEST_DATABASE_URL"))
	if databaseURL == "" {
		t.Skip("TEST_DATABASE_URL is not set")
	}
	ctx := context.Background()
	pool, err := pgxpool.New(ctx, databaseURL)
	if err != nil {
		t.Fatal(err)
	}
	defer pool.Close()
	if err := ApplyMigrations(ctx, pool); err != nil {
		t.Fatal(err)
	}
	store := NewStore(pool)
	now := time.Date(2026, 10, 10, 16, 0, 0, 0, time.UTC)
	if _, err := pool.Exec(ctx, `INSERT INTO source_connections (id, source_type, name) VALUES ('conn-manual', 'manual', 'Manual')`); err != nil {
		t.Fatal(err)
	}
	insertReviewFixture(t, ctx, pool, 2, "tp-seal-a", now)
	if _, err := store.ReviewPublication(ctx, governance.ReviewPublicationRequest{
		PublicationID: "tp-seal-a", Decision: governance.ReviewApproved, DecidedVisibility: governance.VisibilityInternal,
		ReviewerRef: "engineer-1", DecisionCode: "approved_for_release", Now: now.Add(time.Minute),
	}); err != nil {
		t.Fatal(err)
	}
	batch, err := store.CreateReleaseBatch(ctx, governance.CreateReleaseBatchRequest{
		Name: "建批即锁定", CreatedBy: "engineer-1", PublicationIDs: []string{"tp-seal-a"}, SealImmediately: true, Now: now.Add(2 * time.Minute),
	})
	if err != nil {
		t.Fatalf("seal-on-create must succeed: %v", err)
	}
	if batch.State != governance.ReleaseBatchSealed {
		t.Fatalf("batch state = %q, want sealed", batch.State)
	}
	if batch.ReleaseChangeSetID == "" || batch.SealedBy == "" {
		t.Fatalf("sealed batch must carry frozen manifest and sealer: %#v", batch)
	}
}