// Copyright (c) 2025-2026 Probo Inc <hello@probo.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package iam

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.probo.inc/probo/pkg/iam/policy"
)

func TestPolicySet_AddAndMerge(t *testing.T) {
	// Create first policy set (simulating IAM service)
	iamPolicies := NewPolicySet().
		AddRolePolicy("OWNER", policy.NewPolicy("iam-owner", "IAM Owner", policy.Allow("iam:*"))).
		AddRolePolicy("ADMIN", policy.NewPolicy("iam-admin", "IAM Admin", policy.Allow("iam:read:*"))).
		AddIdentityScopedPolicy(policy.NewPolicy("iam-self", "IAM Self", policy.Allow("iam:identity:get")))

	// Create second policy set (simulating Documents service)
	docsPolicies := NewPolicySet().
		AddRolePolicy("OWNER", policy.NewPolicy("docs-owner", "Docs Owner", policy.Allow("docs:*"))).
		AddRolePolicy("VIEWER", policy.NewPolicy("docs-viewer", "Docs Viewer", policy.Allow("docs:read:*"))).
		AddIdentityScopedPolicy(policy.NewPolicy("docs-self", "Docs Self", policy.Allow("docs:own:*")))

	// Merge them
	combined := iamPolicies.Merge(docsPolicies)
	require.NotNil(t, combined, "combined policy set should not be nil")

	// Test OWNER has policies from both services
	ownerPolicies := combined.RolePolicies["OWNER"]
	require.Len(t, ownerPolicies, 2, "should have 2 OWNER policies")

	// Test ADMIN only has IAM policy
	adminPolicies := combined.RolePolicies["ADMIN"]
	require.Len(t, adminPolicies, 1, "should have 1 ADMIN policy")

	// Test VIEWER only has Docs policy
	viewerPolicies := combined.RolePolicies["VIEWER"]
	require.Len(t, viewerPolicies, 1, "should have 1 VIEWER policy")

	// Test self-manage policies from both services
	identityPolicies := combined.IdentityScopedPolicies
	require.Len(t, identityPolicies, 2, "should have 2 identity-scoped policies")
}

func TestIAMPolicySet(t *testing.T) {
	policySet := IAMPolicySet()
	require.NotNil(t, policySet, "IAMPolicySet should not return nil")

	// Should have policies for all standard roles
	roles := []string{"OWNER", "ADMIN", "VIEWER", "EMPLOYEE", "AUDITOR"}
	for _, role := range roles {
		policies := policySet.RolePolicies[role]
		assert.NotEmptyf(t, policies, "expected policies for role %s", role)
	}

	// Should have self-manage policies
	assert.NotEmpty(t, policySet.IdentityScopedPolicies, "expected identity-scoped policies")
}