// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1

package sprawl

import (
	"fmt"

	"github.com/hashicorp/consul/api"

	"github.com/hashicorp/consul/testing/deployer/topology"
)

func policyForCrossNamespaceRead(partition string) *api.ACLPolicy {
	return &api.ACLPolicy{
		Name:        "cross-ns-catalog-read",
		Description: "cross-ns-catalog-read",
		Partition:   partition,
		Rules: fmt.Sprintf(`
partition %[1]q {
  namespace_prefix "" {
    node_prefix ""    { policy = "read" }
    service_prefix "" { policy = "read" }
  }
}
`, partition),
	}
}

const anonymousTokenAccessorID = "00000000-0000-0000-0000-000000000002"

func anonymousToken() *api.ACLToken {
	return &api.ACLToken{
		AccessorID: anonymousTokenAccessorID,
		// SecretID: "anonymous",
		Description: "anonymous",
		Local:       false,
		Policies: []*api.ACLTokenPolicyLink{
			{
				Name: "anonymous",
			},
		},
	}
}

func anonymousPolicy(enterprise bool) *api.ACLPolicy {
	p := &api.ACLPolicy{
		Name:        "anonymous",
		Description: "anonymous",
	}
	if enterprise {
		p.Rules = `
partition_prefix "" {
  namespace_prefix "" {
    node_prefix "" { policy = "read" }
    service_prefix "" { policy = "read" }
  }
}
`
	} else {
		p.Rules = `
node_prefix "" { policy = "read" }
service_prefix "" { policy = "read" }
`
	}
	return p
}

func tokenForNode(node *topology.Node, enterprise bool) *api.ACLToken {
	nid := node.ID()

	tokenName := "agent--" + nid.ACLString()

	token := &api.ACLToken{
		Description: tokenName,
		Local:       false,
		NodeIdentities: []*api.ACLNodeIdentity{{
			NodeName:   node.PodName(),
			Datacenter: node.Datacenter,
		}},
	}
	if enterprise {
		token.Partition = node.Partition
		token.Namespace = "default"
	}
	return token
}

// Deprecated: tokenForWorkload
func tokenForService(wrk *topology.Workload, overridePolicy *api.ACLPolicy, enterprise bool) *api.ACLToken {
	return tokenForWorkload(wrk, overridePolicy, enterprise)
}

func tokenForWorkload(wrk *topology.Workload, overridePolicy *api.ACLPolicy, enterprise bool) *api.ACLToken {
	token := &api.ACLToken{
		Description: "service--" + wrk.ID.ACLString(),
		Local:       false,
	}
	if overridePolicy != nil {
		token.Policies = []*api.ACLTokenPolicyLink{{ID: overridePolicy.ID}}
	} else if wrk.IsV2() {
		token.TemplatedPolicies = []*api.ACLTemplatedPolicy{{
			TemplateName: api.ACLTemplatedPolicyWorkloadIdentityName,
			TemplateVariables: &api.ACLTemplatedPolicyVariables{
				Name: wrk.WorkloadIdentity,
			},
		}}
	} else {
		token.ServiceIdentities = []*api.ACLServiceIdentity{{
			ServiceName: wrk.ID.Name,
		}}
	}

	if enterprise {
		token.Namespace = wrk.ID.Namespace
		token.Partition = wrk.ID.Partition
	}

	return token
}

const (
	meshGatewayCommunityRules = `
service "mesh-gateway" {
  policy = "write"
}
service_prefix "" {
  policy = "read"
}
node_prefix "" {
  policy = "read"
}
agent_prefix "" {
  policy = "read"
}
# for peering
mesh = "write"
peering = "read"
`

	meshGatewayEntDefaultRules = `
namespace_prefix "" {
  service "mesh-gateway" {
    policy = "write"
  }
  service_prefix "" {
    policy = "read"
  }
  node_prefix "" {
    policy = "read"
  }
}
agent_prefix "" {
  policy = "read"
}
# for peering
mesh = "write"

partition_prefix "" {
  peering = "read"
}
`

	meshGatewayEntNonDefaultRules = `
namespace_prefix "" {
  service "mesh-gateway" {
    policy = "write"
  }
  service_prefix "" {
    policy = "read"
  }
  node_prefix "" {
    policy = "read"
  }
}
agent_prefix "" {
  policy = "read"
}
# for peering
mesh = "write"
`
)

func policyForMeshGateway(wrk *topology.Workload, enterprise bool) *api.ACLPolicy {
	policyName := "mesh-gateway--" + wrk.ID.ACLString()

	policy := &api.ACLPolicy{
		Name:        policyName,
		Description: policyName,
	}
	if enterprise {
		policy.Partition = wrk.ID.Partition
		policy.Namespace = "default"
	}

	if enterprise {
		if wrk.ID.Partition == "default" {
			policy.Rules = meshGatewayEntDefaultRules
		} else {
			policy.Rules = meshGatewayEntNonDefaultRules
		}
	} else {
		policy.Rules = meshGatewayCommunityRules
	}

	return policy
}