package atlas_test

import (
	"reflect"
	"strings"
	"testing"

	"git.d-ma.be/mathias/cad-atlas/internal/atlas"
)

func TestHostsFromNodes_DerivesSpecFromNodeStatus(t *testing.T) {
	nodes := []byte(`{"items":[
	  {"metadata":{"name":"koala"},
	   "status":{"capacity":{"cpu":"16","memory":"67108864Ki","nvidia.com/gpu":"1"},
	             "nodeInfo":{"architecture":"amd64","kubeletVersion":"v1.31.4+k3s1"}}},
	  {"metadata":{"name":"worker2"},
	   "status":{"capacity":{"cpu":"8","memory":"33554432Ki"},
	             "nodeInfo":{"architecture":"arm64","kubeletVersion":"v1.30.0+k3s1"}}}
	]}`)

	hosts, err := atlas.HostsFromNodes(nodes)
	if err != nil {
		t.Fatalf("HostsFromNodes: %v", err)
	}

	want := []atlas.Host{
		{Name: "koala", Spec: "amd64 · 16 cpu · 64Gi · 1× GPU · k3s v1.31.4"},
		{Name: "worker2", Spec: "arm64 · 8 cpu · 32Gi · k3s v1.30.0"},
	}
	if !reflect.DeepEqual(hosts, want) {
		t.Fatalf("hosts = %+v\nwant   %+v", hosts, want)
	}
}

func TestMergeSubstrate_LiveOverridesAuthoredKeepsRestAppendsNew(t *testing.T) {
	authored := []atlas.Host{
		{Name: "koala", Spec: "RTX 5070 · authored"},
		{Name: "iguana", Spec: "M2 Ultra · Ollama / mlx"},
		{Name: "piguard", Spec: "NGINX reverse-proxy · ntfy"},
	}
	live := []atlas.Host{
		{Name: "koala", Spec: "amd64 · 16 cpu · 60Gi · 1× GPU · k3s v1.34.5"},
		{Name: "worker9", Spec: "arm64 · 4 cpu"},
	}

	got := atlas.MergeSubstrate(authored, live)
	want := []atlas.Host{
		{Name: "koala", Spec: "amd64 · 16 cpu · 60Gi · 1× GPU · k3s v1.34.5"}, // live wins
		{Name: "iguana", Spec: "M2 Ultra · Ollama / mlx"},                     // authored kept
		{Name: "piguard", Spec: "NGINX reverse-proxy · ntfy"},                 // authored kept
		{Name: "worker9", Spec: "arm64 · 4 cpu"},                              // live-only appended
	}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("merge = %+v\nwant   %+v", got, want)
	}
}

func TestMergeSubstrate_NoLiveReturnsAuthored(t *testing.T) {
	authored := []atlas.Host{{Name: "koala", Spec: "authored"}}
	got := atlas.MergeSubstrate(authored, nil)
	if !reflect.DeepEqual(got, authored) {
		t.Fatalf("merge with no live = %+v, want %+v", got, authored)
	}
}

func TestNamespaceSummary_FiltersSystemSortsAndJoins(t *testing.T) {
	ns := []byte(`{"items":[
	  {"metadata":{"name":"gitea"}},
	  {"metadata":{"name":"kube-system"}},
	  {"metadata":{"name":"ai-stack"}},
	  {"metadata":{"name":"default"}},
	  {"metadata":{"name":"flux-system"}},
	  {"metadata":{"name":"brain"}}
	]}`)

	got, err := atlas.NamespaceSummary(ns)
	if err != nil {
		t.Fatalf("NamespaceSummary: %v", err)
	}
	if want := "ns: ai-stack · brain · gitea"; got != want {
		t.Fatalf("summary = %q, want %q", got, want)
	}
}

func TestNamespaceSummary_CapsWithMore(t *testing.T) {
	var items []string
	for i := 0; i < 15; i++ {
		items = append(items, `{"metadata":{"name":"app`+string(rune('a'+i))+`"}}`)
	}
	ns := []byte(`{"items":[` + strings.Join(items, ",") + `]}`)

	got, err := atlas.NamespaceSummary(ns)
	if err != nil {
		t.Fatalf("NamespaceSummary: %v", err)
	}
	if !strings.HasSuffix(got, "· +3 more") {
		t.Fatalf("expected cap suffix, got %q", got)
	}
}

func TestHostsFromNodes_ErrorsOnBadJSON(t *testing.T) {
	if _, err := atlas.HostsFromNodes([]byte("{not json")); err == nil {
		t.Fatal("expected error on bad JSON, got nil")
	}
}