package controllerdeps

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

// ADR 0590 §5 (issue 1126 B10): no manifest of the catalogue at this head reads, invokes, consumes, waits on, uses or
// otherwise names the controller's seat, states or buckets, and no module's code names a bucket of the controller's.
func TestNothingInTheCatalogueNamesTheController(t *testing.T) {
	got, err := Refusals("../..")
	if err != nil {
		t.Fatal(err)
	}
	for _, r := range got {
		t.Error(r)
	}
}

// The check refuses every name of the controller, the lease and the entries once kept to its write among them, on a
// tree of its own; a repository named mesh-controller (an issue's owner) and a word in prose are no dependency.
func TestRefusalsJudgeATree(t *testing.T) {
	for _, row := range []struct {
		name  string
		files map[string]string
		want  string // empty: passes
	}{
		{"the lease is refused like any read", map[string]string{"modules/a/module.json": `{"module":"a","reads":["mesh-controller.lease"]}`}, `a: names "mesh-controller.lease"`},
		{"a verb once kept to the write", map[string]string{"modules/b/module.json": `{"module":"b","invokes":["seat:mesh-controller.collect"]}`}, `b: names "seat:mesh-controller.collect"`},
		{"an event consumed", map[string]string{"modules/c/module.json": `{"module":"c","consumes":[{"event":"mesh-controller.artifacts-gone"}]}`}, "mesh-controller.artifacts-gone"},
		{"a requirement", map[string]string{"modules/d/module.json": `{"module":"d","requires":[{"name":"x","from":"mesh-controller"}]}`}, `d: names "mesh-controller"`},
		{"the controller's own module", map[string]string{"modules/mesh-controller/module.json": `{"module":"mesh-controller"}`}, "mesh-controller: the controller is no module of the catalogue"},
		{"a bucket in code", map[string]string{"modules/e/cmd/e/main.go": "package main\nconst b = \"mesh-controller_assignments\"\n"}, "modules/e/cmd/e/main.go:2: names the controller's bucket"},
		{"a bucket in a test is its data", map[string]string{"modules/e/cmd/e/main_test.go": "package main\n// mesh-controller_lease\n"}, ""},
		{"a fixture copied from elsewhere", map[string]string{"modules/e/cmd/e/testdata/x.md": "mesh-controller_rollouts\n"}, ""},
		{"an owner and prose pass", map[string]string{"modules/f/module.json": `{"module":"f","config":{"owners":{"default":["mesh-controller","mesh-controller modules/route-proxy"]}},"why":"the mesh-controller module is gone"}`}, ""},
		{"the seat's successors pass", map[string]string{"modules/g/module.json": `{"module":"g","reads":["mesh-placement.placement"],"invokes":["seat:mesh-hand-acts.hand-act"]}`}, ""},
	} {
		t.Run(row.name, func(t *testing.T) {
			root := t.TempDir()
			for path, text := range row.files {
				p := filepath.Join(root, path)
				if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
					t.Fatal(err)
				}
				if err := os.WriteFile(p, []byte(text), 0o644); err != nil {
					t.Fatal(err)
				}
			}
			got, err := Refusals(root)
			if err != nil {
				t.Fatal(err)
			}
			if joined := strings.Join(got, "\n"); (row.want == "") != (joined == "") || !strings.Contains(joined, row.want) {
				t.Errorf("refusals %q, want %q", joined, row.want)
			}
		})
	}
}