package entitlements_test

import (
	"context"
	"database/sql"
	"fmt"
	"os"
	"testing"
	"time"

	"git.coopcloud.tech/wiki-cafe/member-console/internal/db"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/entitlements"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/identity"
	fwmod "git.coopcloud.tech/wiki-cafe/member-console/internal/integrations/fedwiki/store"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/migrate"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/organization"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/provisioning"
	"github.com/google/uuid"
	_ "github.com/jackc/pgx/v5/stdlib"
)

func testDB(t *testing.T) *sql.DB {
	t.Helper()
	dsn := os.Getenv("TEST_DATABASE_URL")
	if dsn == "" {
		t.Skip("TEST_DATABASE_URL not set, skipping integration test")
	}

	database, err := sql.Open("pgx", dsn)
	if err != nil {
		t.Fatalf("failed to open database: %v", err)
	}

	// Run migrations
	sources := migrate.Sources()
	if err := db.RunMigrations(database, sources); err != nil {
		t.Fatalf("failed to run migrations: %v", err)
	}

	t.Cleanup(func() { database.Close() })
	return database
}

func TestMaterializeSingleProvision(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()

	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	orgQ := organization.New(tx)
	idQ := identity.New(tx)

	// Setup: create user, person, org, workspace
	user, err := idQ.CreateUser(ctx, "test-"+uuid.New().String())
	if err != nil {
		t.Fatalf("create user: %v", err)
	}
	person, err := idQ.CreatePerson(ctx, identity.CreatePersonParams{
		UserID:               user.UserID,
		DisplayName:          "Test User",
		PrimaryEmail:         "test@example.com",
		PrimaryEmailVerified: true,
	})
	if err != nil {
		t.Fatalf("create person: %v", err)
	}
	org, err := orgQ.CreateOrganization(ctx, organization.CreateOrganizationParams{
		Name:          "Test Org",
		OrgType:       "personal",
		OwnerPersonID: person.PersonID,
	})
	if err != nil {
		t.Fatalf("create org: %v", err)
	}

	// Create pool and provision
	pool, err := q.CreateResourcePool(ctx, entitlements.CreateResourcePoolParams{
		OrgID:         org.OrgID,
		Name:          "Default",
		PoolType:      "default",
		IsAutoManaged: true,
	})
	if err != nil {
		t.Fatalf("create pool: %v", err)
	}

	// Create a test product with entitlement set (5 sites, not per-unit)
	tp := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	// Create a grant
	grant, err := q.CreateGrant(ctx, entitlements.CreateGrantParams{
		ProductID: tp.productID,
		GrantedToOrgID: uuid.NullUUID{
			UUID:  uuid.MustParse(org.OrgID),
			Valid: true,
		},
		GrantedByPersonID: uuid.NullUUID{UUID: uuid.MustParse(person.PersonID), Valid: true},
		GrantReason:       "promotional",
		Quantity:          1,
		ValidFrom:         time.Now(),
	})
	if err != nil {
		t.Fatalf("create grant: %v", err)
	}

	// Confer the grant onto the pool (core.confer is the only legal writer
	// of pool_provisions).
	_, outcome, err := q.Confer(ctx, entitlements.ConferParams{
		PoolID:    pool.PoolID,
		ProductID: tp.productID,
		GrantID:   uuid.NullUUID{UUID: uuid.MustParse(grant.GrantID), Valid: true},
		Quantity:  1,
	})
	if err != nil {
		t.Fatalf("confer: %v", err)
	}
	if outcome != "created" {
		t.Fatalf("confer outcome = %q, want created", outcome)
	}

	// Materialize
	err = entitlements.MaterializePoolEntitlements(ctx, q, pool.PoolID)
	if err != nil {
		t.Fatalf("materialize: %v", err)
	}

	// Verify entitlement was created
	ent, err := q.GetNumericEntitlementByPoolAndResource(ctx, entitlements.GetNumericEntitlementByPoolAndResourceParams{
		PoolID:      pool.PoolID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("get entitlement: %v", err)
	}

	if ent.ResourceLimit != 5 {
		t.Errorf("expected resource_limit=5, got %d", ent.ResourceLimit)
	}

	// Verify usage record was created
	usage, err := q.GetUsageByPoolAndResource(ctx, entitlements.GetUsageByPoolAndResourceParams{
		PoolID:      pool.PoolID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("get usage: %v", err)
	}

	if usage.CurrentUsage != 0 {
		t.Errorf("expected current_usage=0, got %d", usage.CurrentUsage)
	}
}

// setupTestOrg is a helper that creates user, person, org, workspace, pool, and pool assignment.
// Returns all the created records needed for entitlement tests.
type testOrg struct {
	person    identity.Person
	org       organization.Organization
	workspace organization.Workspace
	pool      entitlements.ResourcePool
}

func setupTestOrg(t *testing.T, ctx context.Context, tx *sql.Tx) testOrg {
	t.Helper()
	q := entitlements.New(tx)
	orgQ := organization.New(tx)
	idQ := identity.New(tx)

	user, err := idQ.CreateUser(ctx, "test-"+uuid.New().String())
	if err != nil {
		t.Fatalf("create user: %v", err)
	}
	person, err := idQ.CreatePerson(ctx, identity.CreatePersonParams{
		UserID:               user.UserID,
		DisplayName:          "Test User",
		PrimaryEmail:         fmt.Sprintf("test-%s@example.com", uuid.New().String()[:8]),
		PrimaryEmailVerified: true,
	})
	if err != nil {
		t.Fatalf("create person: %v", err)
	}
	org, err := orgQ.CreateOrganization(ctx, organization.CreateOrganizationParams{
		Name:          "Test Org",
		OrgType:       "personal",
		OwnerPersonID: person.PersonID,
	})
	if err != nil {
		t.Fatalf("create org: %v", err)
	}
	workspace, err := orgQ.CreateWorkspace(ctx, organization.CreateWorkspaceParams{
		OrgID: org.OrgID,
		Name:  "Default",
	})
	if err != nil {
		t.Fatalf("create workspace: %v", err)
	}
	pool, err := q.CreateResourcePool(ctx, entitlements.CreateResourcePoolParams{
		OrgID:         org.OrgID,
		Name:          "Default",
		PoolType:      "default",
		IsAutoManaged: true,
	})
	if err != nil {
		t.Fatalf("create pool: %v", err)
	}
	_, err = q.CreatePoolAssignment(ctx, entitlements.CreatePoolAssignmentParams{
		PoolID:      pool.PoolID,
		WorkspaceID: workspace.WorkspaceID,
		IsPrimary:   true,
	})
	if err != nil {
		t.Fatalf("create pool assignment: %v", err)
	}
	return testOrg{person: person, org: org, workspace: workspace, pool: pool}
}

// testProduct holds identifiers for a product created by createTestProduct.
type testProduct struct {
	productID string
	setID     string
}

// createTestProduct creates a billing product with an entitlement set containing a "fedwiki_sites" limit rule.
// sitesLimit is the base limit, perUnit controls whether it scales with quantity.
func createTestProduct(t *testing.T, ctx context.Context, tx *sql.Tx, name string, sitesLimit int64, perUnit bool) testProduct {
	t.Helper()
	q := entitlements.New(tx)

	set, err := q.CreateEntitlementSet(ctx, entitlements.CreateEntitlementSetParams{
		Name:     name + " Set",
		IsActive: true,
	})
	if err != nil {
		t.Fatalf("create entitlement set for %s: %v", name, err)
	}

	_, err = q.CreateEntitlementSetRule(ctx, entitlements.CreateEntitlementSetRuleParams{
		SetID:           set.SetID,
		RuleType:        "limit",
		ResourceKey:     sql.NullString{String: "fedwiki_sites", Valid: true},
		ResourceValue:   sql.NullInt64{Int64: sitesLimit, Valid: true},
		ResourcePerUnit: sql.NullBool{Bool: perUnit, Valid: true},
		StackingPolicy:  sql.NullString{String: "additive", Valid: true},
	})
	if err != nil {
		t.Fatalf("create set rule for %s: %v", name, err)
	}

	// display_category stays NULL (presentation-only label per Doc 41
	// Decision 136); lifecycle_status must be 'published' because core.confer
	// refuses draft products.
	var productID string
	err = tx.QueryRowContext(ctx,
		`INSERT INTO core.products (name, is_active, is_public, lifecycle_status, entitlement_set_id)
		 VALUES ($1, TRUE, TRUE, 'published', $2)
		 RETURNING product_id`,
		name, set.SetID,
	).Scan(&productID)
	if err != nil {
		t.Fatalf("create product %s: %v", name, err)
	}

	return testProduct{productID: productID, setID: set.SetID}
}

// createGrantAndProvision records a grant for the given product and quantity,
// confers it onto the org's pool via core.confer, then materializes.
func createGrantAndProvision(t *testing.T, ctx context.Context, tx *sql.Tx, q *entitlements.Queries, to testOrg, productID string, quantity int32) entitlements.Grant {
	t.Helper()

	grant, err := q.CreateGrant(ctx, entitlements.CreateGrantParams{
		ProductID: productID,
		GrantedToOrgID: uuid.NullUUID{
			UUID:  uuid.MustParse(to.org.OrgID),
			Valid: true,
		},
		GrantedByPersonID: uuid.NullUUID{UUID: uuid.MustParse(to.person.PersonID), Valid: true},
		GrantReason:       "manual",
		Quantity:          quantity,
		ValidFrom:         time.Now(),
	})
	if err != nil {
		t.Fatalf("create grant: %v", err)
	}
	_, outcome, err := q.Confer(ctx, entitlements.ConferParams{
		PoolID:    to.pool.PoolID,
		ProductID: productID,
		GrantID:   uuid.NullUUID{UUID: uuid.MustParse(grant.GrantID), Valid: true},
		Quantity:  quantity,
	})
	if err != nil {
		t.Fatalf("confer: %v", err)
	}
	if outcome != "created" {
		t.Fatalf("confer outcome = %q, want created", outcome)
	}
	err = entitlements.MaterializePoolEntitlements(ctx, q, to.pool.PoolID)
	if err != nil {
		t.Fatalf("materialize: %v", err)
	}
	return grant
}

func getEntitlementLimit(t *testing.T, ctx context.Context, q *entitlements.Queries, poolID string) int64 {
	t.Helper()
	ent, err := q.GetNumericEntitlementByPoolAndResource(ctx, entitlements.GetNumericEntitlementByPoolAndResourceParams{
		PoolID:      poolID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("get entitlement: %v", err)
	}
	return ent.ResourceLimit
}

func getUsage(t *testing.T, ctx context.Context, q *entitlements.Queries, poolID string) int64 {
	t.Helper()
	usage, err := q.GetUsageByPoolAndResource(ctx, entitlements.GetUsageByPoolAndResourceParams{
		PoolID:      poolID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("get usage: %v", err)
	}
	return usage.CurrentUsage
}

// 10.2 Test materialization: additive stacking with multiple provisions
func TestMaterializeAdditiveStacking(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	to := setupTestOrg(t, ctx, tx)

	// Test product: 5 sites per grant (not per-unit)
	product := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	// First grant: should get limit=5
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)
	if limit := getEntitlementLimit(t, ctx, q, to.pool.PoolID); limit != 5 {
		t.Errorf("after first grant: expected limit=5, got %d", limit)
	}

	// Second grant: additive stacking should give limit=10
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)
	if limit := getEntitlementLimit(t, ctx, q, to.pool.PoolID); limit != 10 {
		t.Errorf("after second grant: expected limit=10, got %d", limit)
	}

	// Also test per-unit product: 1 site × quantity
	siteCreditProduct := createTestProduct(t, ctx, tx, "TestSiteCredit", 1, true)
	createGrantAndProvision(t, ctx, tx, q, to, siteCreditProduct.productID, 3)
	// 5 + 5 + 3 = 13
	if limit := getEntitlementLimit(t, ctx, q, to.pool.PoolID); limit != 13 {
		t.Errorf("after site credit grant (qty=3): expected limit=13, got %d", limit)
	}
}

// 10.3 Test materialization: provision removal recomputes limit correctly
func TestMaterializeProvisionRemoval(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	to := setupTestOrg(t, ctx, tx)

	product := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	// Create two grants
	grant1 := createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)

	// Limit should be 10
	if limit := getEntitlementLimit(t, ctx, q, to.pool.PoolID); limit != 10 {
		t.Fatalf("expected limit=10, got %d", limit)
	}

	// Revoke first grant (the decree), end its conferral (the enactment),
	// re-materialize
	_, err = q.RevokeGrant(ctx, entitlements.RevokeGrantParams{
		GrantID: grant1.GrantID,
	})
	if err != nil {
		t.Fatalf("revoke grant: %v", err)
	}
	ended, err := q.EndConferral(ctx, entitlements.EndConferralParams{
		GrantID: uuid.NullUUID{UUID: uuid.MustParse(grant1.GrantID), Valid: true},
	})
	if err != nil {
		t.Fatalf("end conferral: %v", err)
	}
	if len(ended) != 1 {
		t.Fatalf("expected 1 ended provision, got %d", len(ended))
	}
	err = entitlements.MaterializePoolEntitlements(ctx, q, to.pool.PoolID)
	if err != nil {
		t.Fatalf("re-materialize: %v", err)
	}

	// Limit should drop to 5
	if limit := getEntitlementLimit(t, ctx, q, to.pool.PoolID); limit != 5 {
		t.Errorf("after revocation: expected limit=5, got %d", limit)
	}
}

// 10.4 Test materialization: idempotency (repeated calls produce same result)
func TestMaterializeIdempotency(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	to := setupTestOrg(t, ctx, tx)

	product := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)

	// Call materialize multiple times
	for i := 0; i < 3; i++ {
		err = entitlements.MaterializePoolEntitlements(ctx, q, to.pool.PoolID)
		if err != nil {
			t.Fatalf("materialize iteration %d: %v", i, err)
		}
	}

	// Limit should still be 5
	if limit := getEntitlementLimit(t, ctx, q, to.pool.PoolID); limit != 5 {
		t.Errorf("expected limit=5 after repeated materialize, got %d", limit)
	}
	if usage := getUsage(t, ctx, q, to.pool.PoolID); usage != 0 {
		t.Errorf("expected usage=0 after repeated materialize, got %d", usage)
	}
}

// 10.5 Test grant flow: create grant → entitlements materialize → site creation succeeds
func TestGrantFlowSiteCreation(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	fwQ := fwmod.New(tx)
	to := setupTestOrg(t, ctx, tx)

	product := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	// Grant gives 5 sites
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)

	// Atomic increment should succeed (usage 0 < limit 5)
	result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
		WorkspaceID: to.workspace.WorkspaceID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("atomic increment: %v", err)
	}
	rows, _ := result.RowsAffected()
	if rows != 1 {
		t.Fatalf("expected 1 row affected, got %d", rows)
	}

	// Create a site
	site, err := fwQ.CreateSite(ctx, fwmod.CreateSiteParams{
		SiteID:      uuid.New().String(),
		WorkspaceID: to.workspace.WorkspaceID,
		Domain:      "test-" + uuid.New().String()[:8] + ".example.com",
	})
	if err != nil {
		t.Fatalf("create site: %v", err)
	}
	if site.WorkspaceID != to.workspace.WorkspaceID {
		t.Errorf("site workspace mismatch")
	}

	// Usage should be 1
	if usage := getUsage(t, ctx, q, to.pool.PoolID); usage != 1 {
		t.Errorf("expected usage=1 after increment, got %d", usage)
	}
}

// 10.6 Test grant revocation: revoke grant → limit reduced → site creation blocked at new limit
func TestGrantRevocationBlocksSiteCreation(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	to := setupTestOrg(t, ctx, tx)

	product := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	// Two grants: limit=10
	grant1 := createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)

	// Use 6 sites (within limit of 10)
	for i := 0; i < 6; i++ {
		result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
			WorkspaceID: to.workspace.WorkspaceID,
			ResourceKey: "fedwiki_sites",
		})
		if err != nil {
			t.Fatalf("increment %d: %v", i, err)
		}
		rows, _ := result.RowsAffected()
		if rows != 1 {
			t.Fatalf("increment %d: expected 1 row, got %d", i, rows)
		}
	}

	// Revoke first grant and end its conferral → limit drops to 5, but usage is 6
	_, err = q.RevokeGrant(ctx, entitlements.RevokeGrantParams{GrantID: grant1.GrantID})
	if err != nil {
		t.Fatalf("revoke: %v", err)
	}
	ended, err := q.EndConferral(ctx, entitlements.EndConferralParams{
		GrantID: uuid.NullUUID{UUID: uuid.MustParse(grant1.GrantID), Valid: true},
	})
	if err != nil {
		t.Fatalf("end conferral: %v", err)
	}
	if len(ended) != 1 {
		t.Fatalf("expected 1 ended provision, got %d", len(ended))
	}
	err = entitlements.MaterializePoolEntitlements(ctx, q, to.pool.PoolID)
	if err != nil {
		t.Fatalf("re-materialize: %v", err)
	}

	// Limit is now 5, usage is 6 → increment should fail (0 rows)
	if limit := getEntitlementLimit(t, ctx, q, to.pool.PoolID); limit != 5 {
		t.Errorf("expected limit=5, got %d", limit)
	}
	result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
		WorkspaceID: to.workspace.WorkspaceID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("atomic increment: %v", err)
	}
	rows, _ := result.RowsAffected()
	if rows != 0 {
		t.Errorf("expected 0 rows (blocked), got %d", rows)
	}
}

// 10.7 Test entitlement check: atomic increment rejects when at limit
func TestAtomicIncrementRejectsAtLimit(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	to := setupTestOrg(t, ctx, tx)

	product := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	// Grant gives limit=5
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)

	// Use all 5
	for i := 0; i < 5; i++ {
		result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
			WorkspaceID: to.workspace.WorkspaceID,
			ResourceKey: "fedwiki_sites",
		})
		if err != nil {
			t.Fatalf("increment %d: %v", i, err)
		}
		rows, _ := result.RowsAffected()
		if rows != 1 {
			t.Fatalf("increment %d: expected 1 row, got %d", i, rows)
		}
	}

	// 6th increment should fail
	result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
		WorkspaceID: to.workspace.WorkspaceID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("6th increment: %v", err)
	}
	rows, _ := result.RowsAffected()
	if rows != 0 {
		t.Errorf("expected 0 rows (at limit), got %d", rows)
	}

	// Usage should still be 5
	if usage := getUsage(t, ctx, q, to.pool.PoolID); usage != 5 {
		t.Errorf("expected usage=5, got %d", usage)
	}
}

// 10.7b Test clamp: when a downgrade reduces the limit below current usage,
// existing usage is retained and new creation is blocked (the 8c downgrade contract).
func TestAtomicIncrementClampedWhenOverLimit(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	to := setupTestOrg(t, ctx, tx)

	// Member starts on a higher tier (limit 5) and uses 3 sites.
	product := createTestProduct(t, ctx, tx, "TestProductStandard", 5, false)
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)
	for i := 0; i < 3; i++ {
		result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
			WorkspaceID: to.workspace.WorkspaceID,
			ResourceKey: "fedwiki_sites",
		})
		if err != nil {
			t.Fatalf("increment %d: %v", i, err)
		}
		if rows, _ := result.RowsAffected(); rows != 1 {
			t.Fatalf("increment %d: expected 1 row, got %d", i, rows)
		}
	}

	// Downgrade reduces the sites limit below current usage (5 -> 1).
	if _, err := tx.ExecContext(ctx,
		"UPDATE core.numeric_entitlements SET resource_limit = 1 WHERE pool_id = $1 AND resource_key = 'fedwiki_sites'",
		to.pool.PoolID,
	); err != nil {
		t.Fatalf("reduce limit: %v", err)
	}

	// Over the limit (usage 3 > limit 1): creation must be refused (clamp).
	result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
		WorkspaceID: to.workspace.WorkspaceID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("over-limit increment: %v", err)
	}
	if rows, _ := result.RowsAffected(); rows != 0 {
		t.Errorf("expected 0 rows (clamped over limit), got %d", rows)
	}

	// Existing usage is retained — nothing is deleted or reset.
	if usage := getUsage(t, ctx, q, to.pool.PoolID); usage != 3 {
		t.Errorf("expected usage retained at 3, got %d", usage)
	}
}

// 10.8 Test site deletion: usage decremented, new site creation succeeds
func TestSiteDeletionDecrementsUsage(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()
	tx, err := database.BeginTx(ctx, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer tx.Rollback()

	q := entitlements.New(tx)
	fwQ := fwmod.New(tx)
	to := setupTestOrg(t, ctx, tx)

	product := createTestProduct(t, ctx, tx, "TestProduct", 5, false)

	// Grant gives limit=5, use all 5
	createGrantAndProvision(t, ctx, tx, q, to, product.productID, 1)
	sites := make([]fwmod.Site, 5)
	for i := 0; i < 5; i++ {
		result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
			WorkspaceID: to.workspace.WorkspaceID,
			ResourceKey: "fedwiki_sites",
		})
		if err != nil {
			t.Fatalf("increment %d: %v", i, err)
		}
		rows, _ := result.RowsAffected()
		if rows != 1 {
			t.Fatalf("increment %d failed", i)
		}
		sites[i], err = fwQ.CreateSite(ctx, fwmod.CreateSiteParams{
			SiteID:      uuid.New().String(),
			WorkspaceID: to.workspace.WorkspaceID,
			Domain:      fmt.Sprintf("site-%d-%s.example.com", i, uuid.New().String()[:8]),
		})
		if err != nil {
			t.Fatalf("create site %d: %v", i, err)
		}
	}

	// At limit — increment should fail
	result, err := q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
		WorkspaceID: to.workspace.WorkspaceID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("increment at limit: %v", err)
	}
	rows, _ := result.RowsAffected()
	if rows != 0 {
		t.Fatalf("expected blocked at limit, got %d rows", rows)
	}

	// Delete a site and decrement usage
	err = fwQ.DeleteSite(ctx, sites[0].SiteID)
	if err != nil {
		t.Fatalf("delete site: %v", err)
	}
	_, err = q.AtomicDecrementUsage(ctx, entitlements.AtomicDecrementUsageParams{
		WorkspaceID: to.workspace.WorkspaceID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("decrement: %v", err)
	}

	// Usage should be 4, and increment should now succeed
	if usage := getUsage(t, ctx, q, to.pool.PoolID); usage != 4 {
		t.Errorf("expected usage=4 after delete, got %d", usage)
	}
	result, err = q.AtomicIncrementUsage(ctx, entitlements.AtomicIncrementUsageParams{
		WorkspaceID: to.workspace.WorkspaceID,
		ResourceKey: "fedwiki_sites",
	})
	if err != nil {
		t.Fatalf("increment after delete: %v", err)
	}
	rows, _ = result.RowsAffected()
	if rows != 1 {
		t.Errorf("expected increment to succeed after delete, got %d rows", rows)
	}
}

// 10.9 Test auto-provisioning: new user gets pool and pool assignment
func TestAutoProvisioningCreatesPoolAndAssignment(t *testing.T) {
	database := testDB(t)
	ctx := context.Background()

	claims := provisioning.OIDCClaims{
		Subject:           "test-" + uuid.New().String(),
		Email:             fmt.Sprintf("test-%s@example.com", uuid.New().String()[:8]),
		EmailVerified:     true,
		Name:              "Auto Test User",
		PreferredUsername: "autotest-" + uuid.New().String()[:8],
	}

	result, err := provisioning.AutoProvision(ctx, database, claims)
	if err != nil {
		t.Fatalf("auto-provision: %v", err)
	}

	// Verify pool was created
	if result.Pool.PoolID == "" {
		t.Error("expected pool to be created")
	}
	if result.Pool.PoolType != "default" {
		t.Errorf("expected pool_type=default, got %s", result.Pool.PoolType)
	}
	if !result.Pool.IsAutoManaged {
		t.Error("expected pool to be auto-managed")
	}

	// Verify pool assignment was created
	if result.PoolAssignment.AssignmentID == "" {
		t.Error("expected pool assignment to be created")
	}
	if result.PoolAssignment.PoolID != result.Pool.PoolID {
		t.Error("pool assignment should reference the created pool")
	}
	if result.PoolAssignment.WorkspaceID != result.Workspace.WorkspaceID {
		t.Error("pool assignment should reference the created workspace")
	}
	if !result.PoolAssignment.IsPrimary {
		t.Error("expected pool assignment to be primary")
	}
}

// 10.10 Test full migration sequence on fresh database
func TestFullMigrationSequence(t *testing.T) {
	dsn := os.Getenv("TEST_DATABASE_URL")
	if dsn == "" {
		t.Skip("TEST_DATABASE_URL not set, skipping integration test")
	}

	database, err := sql.Open("pgx", dsn)
	if err != nil {
		t.Fatalf("failed to open database: %v", err)
	}
	defer database.Close()

	// Run all migrations in dependency order
	sources := migrate.Sources()
	if err := db.RunMigrations(database, sources); err != nil {
		t.Fatalf("migration sequence failed: %v", err)
	}

	ctx := context.Background()

	// Verify core schema structures exist after migrations
	// (Products and entitlement sets are created at runtime, not seeded)

	// Verify org_types table was seeded with 'personal'
	orgQ := organization.New(database)
	orgType, err := orgQ.GetOrgType(ctx, "personal")
	if err != nil {
		t.Fatalf("personal org type not found after migrations: %v", err)
	}
	if orgType.DisplayName != "Personal" {
		t.Errorf("expected display_name='Personal', got %q", orgType.DisplayName)
	}

	// Verify entitlement tables are queryable
	entQ := entitlements.New(database)
	_, err = entQ.ListEntitlementSets(ctx)
	if err != nil {
		t.Fatalf("list entitlement sets: %v", err)
	}
}