package config

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)

const mockAgentEndpoint = `[{"agent_id":"agent-mock","cell_id":"cell-mock","address":"127.0.0.1:19090","server_name":"agent.local"}]`

func writeMockAgentEndpoints(t *testing.T, body string) string {
	t.Helper()
	filename := filepath.Join(t.TempDir(), "agent-endpoints.json")
	if err := os.WriteFile(filename, []byte(body), 0600); err != nil {
		t.Fatal(err)
	}
	return filename
}

func TestLoadCurrentMockAgentEndpointRequiresOneLocalDeploymentTarget(t *testing.T) {
	endpoint, err := LoadCurrentMockAgentEndpoint(writeMockAgentEndpoints(t, mockAgentEndpoint))
	if err != nil || endpoint.AgentID != "agent-mock" || endpoint.CellID != "cell-mock" ||
		endpoint.Address != "127.0.0.1:19090" || endpoint.ServerName != "agent.local" {
		t.Fatalf("approved local Agent target was changed: %v", err)
	}
	if _, err := LoadCurrentMockAgentEndpoint(""); err == nil {
		t.Fatal("missing target inventory was defaulted")
	}
	for _, tc := range []struct {
		name, body string
	}{
		{"multiple Agents", `[{"agent_id":"agent-mock","cell_id":"cell-mock","address":"127.0.0.1:19090","server_name":"agent.local"},{"agent_id":"other","cell_id":"other","address":"127.0.0.1:19091","server_name":"other.local"}]`},
		{"external address", strings.Replace(mockAgentEndpoint, "127.0.0.1:19090", "saas.example.invalid:443", 1)},
		{"public listener", strings.Replace(mockAgentEndpoint, "127.0.0.1:19090", "0.0.0.0:19090", 1)},
		{"duplicate address", strings.Replace(mockAgentEndpoint, `"address":"127.0.0.1:19090"`, `"address":"127.0.0.1:19090","address":"127.0.0.1:19091"`, 1)},
		{"oversized inventory", strings.Repeat(" ", 65<<10) + mockAgentEndpoint},
	} {
		t.Run(tc.name, func(t *testing.T) {
			if _, err := LoadCurrentMockAgentEndpoint(writeMockAgentEndpoints(t, tc.body)); err == nil || strings.Contains(err.Error(), "saas.example.invalid") {
				t.Fatalf("unapproved Agent target accepted or echoed: %v", err)
			}
		})
	}
}