package postgres

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

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

	"knowledge-governance/internal/governance"
)

func TestScopeRulesResolveItemOverrideThenNearestDirectoryThenSourceDefault(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)
	}
	_, err = pool.Exec(ctx, `
INSERT INTO source_connections (id, source_type, name, enabled) VALUES ('conn-scope', 'pp', 'Scope PP', true);
INSERT INTO source_items (id, source_connection_id, stable_external_id, canonical_uri_hash, normalized_path, title, item_type, revision, visibility, visibility_origin)
VALUES
	 ('item-a', 'conn-scope', 'a', repeat('a',64), '产品/说明书', 'A.pdf', 'document', 'v1', 'external', 'pp_public_tag'),
	 ('item-b', 'conn-scope', 'b', repeat('b',64), '产品/说明书', 'B.pdf', 'document', 'v1', 'external', 'pp_public_tag');
INSERT INTO source_item_versions (id, source_item_id, revision, content_state)
VALUES ('version-a','item-a','v1','over_limit'), ('version-b','item-b','v1','over_limit');
INSERT INTO test_publications (id,source_item_version_id,test_kb_id,knowledge_id,ingest_state,processing_state,retrieval_state,updated_at)
VALUES ('publication-a','version-a','test-kb','knowledge-a','uploaded','completed','unpublished',NOW());
INSERT INTO acceptance_results (id,publication_id,run_id,check_type,state,policy_version,evidence_summary,observed_at)
VALUES
 ('accept-a-1','publication-a','run-a','knowledge_exists','passed','v1','{}',NOW()),
 ('accept-a-2','publication-a','run-a','chunks_present','passed','v1','{}',NOW()),
 ('accept-a-3','publication-a','run-a','retrieval_hit','manual_required','v1','{}',NOW());`)
	if err != nil {
		t.Fatal(err)
	}
	store := NewStore(pool)
	now := time.Date(2026, 9, 8, 1, 0, 0, 0, time.UTC)
	if _, err = store.MutateScopeRule(ctx, governance.ScopeRuleMutation{TargetType: governance.ScopeTargetDirectory, ConnectionID: "conn-scope", DirectoryPath: "产品", Visibility: governance.VisibilityInternal, OperatorRef: "engineer-1", Reason: "内部产品资料", Now: now}); err != nil {
		t.Fatal(err)
	}
	reviews, err := store.ListReviewCandidates(ctx, governance.ReviewCandidateFilter{Limit: 10})
	if err != nil || len(reviews.Items) != 1 || reviews.Items[0].CurrentVisibility != governance.VisibilityInternal {
		t.Fatalf("review candidate effective scope=%#v err=%v", reviews, err)
	}
	if _, err = store.MutateScopeRule(ctx, governance.ScopeRuleMutation{TargetType: governance.ScopeTargetItem, SourceItemID: "item-b", Visibility: governance.VisibilityExternal, OperatorRef: "engineer-1", Reason: "该文件已公开", Now: now.Add(time.Minute)}); err != nil {
		t.Fatal(err)
	}
	page, err := store.ListSourceAssets(ctx, governance.SourceAssetFilter{Limit: 10})
	if err != nil {
		t.Fatal(err)
	}
	got := map[string]governance.SourceAsset{}
	for _, item := range page.Items {
		got[item.ID] = item
	}
	if got["item-a"].Visibility != governance.VisibilityInternal || got["item-a"].VisibilityOrigin != "directory_rule" || got["item-a"].ScopeRulePath != "产品" {
		t.Fatalf("directory effective scope = %#v", got["item-a"])
	}
	if got["item-b"].Visibility != governance.VisibilityExternal || got["item-b"].VisibilityOrigin != "file_override" {
		t.Fatalf("item override = %#v", got["item-b"])
	}
	rules, err := store.ListScopeRules(ctx, "conn-scope")
	if err != nil || len(rules) != 2 {
		t.Fatalf("rules=%#v err=%v", rules, err)
	}
	if _, err = store.MutateScopeRule(ctx, governance.ScopeRuleMutation{TargetType: governance.ScopeTargetItem, SourceItemID: "item-b", Clear: true, OperatorRef: "engineer-1", Reason: "恢复目录设置", Now: now.Add(2 * time.Minute)}); err != nil {
		t.Fatal(err)
	}
	page, _ = store.ListSourceAssets(ctx, governance.SourceAssetFilter{Limit: 10})
	for _, item := range page.Items {
		if item.ID == "item-b" && (item.Visibility != governance.VisibilityInternal || item.VisibilityOrigin != "directory_rule") {
			t.Fatalf("cleared item = %#v", item)
		}
	}
	if _, err = store.MutateScopeRule(ctx, governance.ScopeRuleMutation{TargetType: governance.ScopeTargetDirectory, ConnectionID: "conn-scope", DirectoryPath: "产品", Clear: true, OperatorRef: "engineer-1", Reason: "恢复来源设置", Now: now.Add(3 * time.Minute)}); err != nil {
		t.Fatal(err)
	}
	page, _ = store.ListSourceAssets(ctx, governance.SourceAssetFilter{Limit: 10})
	for _, item := range page.Items {
		if item.Visibility != governance.VisibilityExternal || item.VisibilityOrigin != "pp_public_tag" {
			t.Fatalf("source fallback = %#v", item)
		}
	}
	var events int
	if err = pool.QueryRow(ctx, `SELECT COUNT(*) FROM scope_change_events`).Scan(&events); err != nil || events != 4 {
		t.Fatalf("events=%d err=%v", events, err)
	}
}

func TestMutateScopeRuleWithOperationReplaysOnceAndRejectsConflict(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)
	}
	if _, err := pool.Exec(ctx, `INSERT INTO source_connections(id,source_type,name,enabled) VALUES('conn-scope-op','pp','Scope operation',true)`); err != nil {
		t.Fatal(err)
	}
	store := NewStore(pool)
	request := governance.ScopeRuleMutation{TargetType: governance.ScopeTargetDirectory, ConnectionID: "conn-scope-op", DirectoryPath: "产品", Visibility: governance.VisibilityInternal, OperatorRef: "engineer-1", Reason: "内部资料", Now: time.Date(2026, 9, 11, 9, 0, 0, 0, time.UTC)}
	first, replayed, err := store.MutateScopeRuleWithOperation(ctx, request, "op-scope-1")
	if err != nil || replayed || first.Visibility != governance.VisibilityInternal {
		t.Fatalf("first=%#v replayed=%v err=%v", first, replayed, err)
	}
	second, replayed, err := store.MutateScopeRuleWithOperation(ctx, request, "op-scope-1")
	if err != nil || !replayed || second != first {
		t.Fatalf("second=%#v replayed=%v err=%v", second, replayed, err)
	}
	conflict := request
	conflict.Reason = "不同的决定"
	if _, _, err := store.MutateScopeRuleWithOperation(ctx, conflict, "op-scope-1"); !errors.Is(err, ErrOperationRequestConflict) {
		t.Fatalf("conflict err=%v", err)
	}
	var events int
	if err := pool.QueryRow(ctx, `SELECT COUNT(*) FROM scope_change_events`).Scan(&events); err != nil || events != 1 {
		t.Fatalf("events=%d err=%v", events, err)
	}
}