package main

import (
	"os"
	"testing"
)

// A retired word's plural is the word; anything else joined on is another word.
func TestPatternMatchesTheWordAndItsPlural(t *testing.T) {
	cases := []struct {
		word, text string
		want       bool
	}{
		{"control plane", "ask the control plane", true},
		{"control plane", "two control planes", true},
		{"control plane", "two control\n\tplanes", true},
		{"substrate", "the substrates", true},
		{"flavor", "flavors of a module", true},
		{"flavor", "flavored", false},
		{"node tools", "node toolsets", false},
		{"mesh-console", "the mesh-consoles", true},
		{"mesh-console", "mesh-console-x", false},
	}
	for _, c := range cases {
		if got := pattern(c.word).MatchString(c.text); got != c.want {
			t.Errorf("pattern(%q) on %q = %v, want %v", c.word, c.text, got, c.want)
		}
	}
}

// A daemon's line is found whole — the daemon, its command, and an argument where the command is a line only with
// one — and prose that merely names the daemon beside a word is not one (novox/hq ADR 0272).
func TestADaemonsLineIsFoundWhole(t *testing.T) {
	push := retiredLine{daemon: "mesh-controller", command: "push"}
	module := retiredLine{daemon: "mesh-controller", command: "module", withArgument: true}
	handOver := retiredLine{daemon: "nox-mesh-host", command: "hand-over"}
	cases := []struct {
		line retiredLine
		text string
		want bool
	}{
		{push, "run `mesh-controller push laptop` after", true},
		{push, "mesh-controller push", true},
		{push, "mesh-controller\n  push", true},
		{push, "mesh-controller pushed it", false},
		{push, "the mesh-controller pushes", false},
		{push, "mesh-controller-push", false},
		{module, "`mesh-controller module check modules/*/module.json`", true},
		{module, "run\n  $ mesh-controller module check x", true},
		{module, "the mesh-controller module is assigned", false},
		{module, "mesh-controller module", false},
		{module, "`mesh-controller module`", false},
		{handOver, "`nox-mesh-host hand-over /srv/x` at the machine", true},
		{handOver, "`nox node hand-over laptop /srv/x`", false},
		{retiredLine{daemon: "mesh-host", command: "hand-over"}, "nox-mesh-host hand-over", false},
	}
	for _, c := range cases {
		if got := linePattern(c.line).MatchString(c.text); got != c.want {
			t.Errorf("%s %s on %q = %v, want %v", c.line.daemon, c.line.command, c.text, got, c.want)
		}
	}
	found := checkLines([]retiredLine{push, module}, []text{{file: "m/a.go", line: 3, s: "say\n`mesh-controller push`"},
		{file: "m/b.go", line: 1, s: "the mesh-controller module"}})
	if len(found) != 1 || found[0] != "m/a.go:4: `mesh-controller push` is a daemon's line — the operator types `nox …` (novox/hq ADR 0272) — in \"say `mesh-controller push`\"" {
		t.Fatalf("found %q", found)
	}
}

// The list's lines read as `<daemon> <command>`, a trailing ` …` meaning an argument must follow; anything else is
// refused rather than read as some line.
func TestRetiredLinesAreReadAsDaemonAndCommand(t *testing.T) {
	dir := t.TempDir()
	path := dir + "/retired-lines"
	if err := os.WriteFile(path, []byte("# the list\nmesh-controller push\nmesh-controller module …\n\nnox-mesh-host hand-over\n"), 0o644); err != nil {
		t.Fatal(err)
	}
	lines, err := readLines(path)
	if err != nil || len(lines) != 3 || lines[0] != (retiredLine{daemon: "mesh-controller", command: "push"}) ||
		lines[1] != (retiredLine{daemon: "mesh-controller", command: "module", withArgument: true}) ||
		lines[2] != (retiredLine{daemon: "nox-mesh-host", command: "hand-over"}) {
		t.Fatalf("read %+v, %v", lines, err)
	}
	if err := os.WriteFile(path, []byte("mesh-controller\n"), 0o644); err != nil {
		t.Fatal(err)
	}
	if _, err := readLines(path); err == nil {
		t.Fatal("a line with no command was read")
	}
}