package enums_test

// Anti-drift tests for the shared client enum tables (design/07 §6, requirement
// 4): each table is pinned to the real code that defines its values, so a value
// added to (or renamed in) an adapter, the emotion state machine or the frontend
// mode union without registering it here fails the build rather than silently
// reaching clients as an unmapped string.
//
// The platform test builds the real built-in adapters and asserts the table and
// their Name() values are the same set — not merely that the table holds some
// strings. The adapters are constructed with empty configs, which never dials
// out (Connect does); see cmd/cyrene's factory test for the wiring-level anchor.

import (
	"errors"
	"io/fs"
	"os"
	"regexp"
	"slices"
	"sort"
	"strings"
	"testing"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/contract/enums"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/persona/emotion"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/history"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/channels/kook"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/channels/qq_obv11"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/channels/telegram"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/channels/webhook"
	"git.yeij.top/AskaEth/Cyrene_v2/plugins/channels/weixin_ilink"
)

// ids maps a table to its id set.
func ids(items []enums.Item) map[string]bool {
	out := make(map[string]bool, len(items))
	for _, it := range items {
		out[it.ID] = true
	}
	return out
}

// sortedKeys returns the keys of a set in a stable order for diffs.
func sortedKeys(set map[string]bool) []string {
	out := make([]string, 0, len(set))
	for k := range set {
		out = append(out, k)
	}
	sort.Strings(out)
	return out
}

// adapterPlatformNames returns the Name() of every built-in IM adapter plus the
// Web main-session source. It is the authority the platform table mirrors: if an
// adapter is renamed and the table is not, the two sets diverge and the test
// fails.
func adapterPlatformNames(t *testing.T) []string {
	t.Helper()
	weixin, err := weixin_ilink.New(weixin_ilink.Config{}, nil, nil)
	if err != nil {
		t.Fatalf("build weixin-ilink adapter: %v", err)
	}
	return []string{
		history.PlatformWeb,
		kook.New(kook.Config{}).Name(),
		qq_obv11.NewAdapter(qq_obv11.Config{}).Name(),
		weixin.Name(),
		telegram.New(telegram.Config{}).Name(),
		webhook.New().Name(),
	}
}

// TestPlatformTableMatchesAdapterNames asserts the published platform table and
// the adapters the app actually builds are the same set, in both directions: an
// unregistered adapter (missing entry) and a phantom entry (a platform no
// adapter provides) both fail.
func TestPlatformTableMatchesAdapterNames(t *testing.T) {
	t.Parallel()
	want := make(map[string]bool)
	for _, name := range adapterPlatformNames(t) {
		want[name] = true
	}
	got := ids(enums.Platforms())
	for _, name := range sortedKeys(want) {
		if !got[name] {
			t.Errorf("adapter Name() %q is missing from enums.Platforms()", name)
		}
	}
	for _, id := range sortedKeys(got) {
		if !want[id] {
			t.Errorf("enums.Platforms() lists %q, which no built-in adapter provides", id)
		}
	}
	if len(want) != len(got) {
		t.Fatalf("platform count = %d, want %d (table=%v adapters=%v)", len(got), len(want), sortedKeys(got), sortedKeys(want))
	}
}

// TestMoodTableMatchesEmotionBuiltins asserts the mood table is exactly the
// emotion state machine's built-in states, referencing the constants rather than
// re-typing the strings, and that every state the default transition table
// mentions is therefore labeled (a transition to an unlabeled state would reach
// clients as a display-raw string).
func TestMoodTableMatchesEmotionBuiltins(t *testing.T) {
	t.Parallel()
	builtins := []emotion.EmotionState{emotion.Calm, emotion.Happy, emotion.Excited, emotion.Sad, emotion.Angry}
	want := make(map[string]bool, len(builtins))
	for _, s := range builtins {
		want[string(s)] = true
	}
	got := ids(enums.Moods())
	if !slices.Equal(sortedKeys(got), sortedKeys(want)) {
		t.Fatalf("mood table ids = %v, want the emotion built-ins %v", sortedKeys(got), sortedKeys(want))
	}
	for _, entry := range enums.Moods() {
		if entry.Label == "" {
			t.Errorf("mood %q has no label", entry.ID)
		}
	}
	for from, tos := range emotion.DefaultTransitions() {
		if !got[string(from)] {
			t.Errorf("default transition source %q is not in the mood table", from)
		}
		for _, to := range tos {
			if !got[string(to)] {
				t.Errorf("default transition target %q is not in the mood table", to)
			}
		}
	}
}

// frontendTypesDir 是前端共享类型的目录：barrel（lib/types.ts）+ 按域拆分的
// lib/types/*.ts（阶段 0 的结构拆分，方案见 DevDocs/audit/_plan.md）。
const frontendTypesDir = "../../../frontend/web/src/lib/types"

// readFrontendTypes 汇总 barrel 与目录下全部 .ts 的源码。按目录收集而不是写死单个文件，
// 是为了让「MODES 数组住在哪个文件」不成为本测试的耦合点——以后再搬一次也不用改它。
// barrel 缺失（backend-only checkout）时返回 fs.ErrNotExist，由调用方跳过。
func readFrontendTypes() ([]byte, error) {
	paths := []string{frontendTypesDir + ".ts"}
	entries, err := os.ReadDir(frontendTypesDir)
	if err != nil && !errors.Is(err, fs.ErrNotExist) {
		return nil, err
	}
	for _, e := range entries {
		if !e.IsDir() && strings.HasSuffix(e.Name(), ".ts") {
			paths = append(paths, frontendTypesDir+"/"+e.Name())
		}
	}
	var all []byte
	for _, p := range paths {
		raw, err := os.ReadFile(p)
		if err != nil {
			return nil, err
		}
		all = append(all, raw...)
		all = append(all, '\n')
	}
	return all, nil
}

// TestModeTableMatchesFrontendModes asserts the mode table matches the frontend's
// Mode union / MODES array, the only code-level definition of the nine modes. This
// is the cross-language drift guard: adding a mode on either side without the other
// fails here.
func TestModeTableMatchesFrontendModes(t *testing.T) {
	t.Parallel()
	raw, err := readFrontendTypes()
	if err != nil {
		if errors.Is(err, fs.ErrNotExist) {
			t.Skipf("%s not present (backend-only checkout)", frontendTypesDir)
		}
		t.Fatalf("read frontend types: %v", err)
	}
	block := regexp.MustCompile(`(?s)export const MODES\s*:[^=]*=\s*\[(.*?)\]`).FindSubmatch(raw)
	if block == nil {
		t.Fatalf("MODES array not found under %s", frontendTypesDir)
	}
	quoted := regexp.MustCompile(`"([^"]+)"`).FindAllStringSubmatch(string(block[1]), -1)
	frontend := make([]string, 0, len(quoted))
	for _, m := range quoted {
		frontend = append(frontend, m[1])
	}
	backend := make([]string, 0, len(enums.Modes()))
	for _, m := range enums.Modes() {
		backend = append(backend, m.ID)
	}
	if !slices.Equal(backend, frontend) {
		t.Fatalf("mode table = %v, want the frontend MODES %v", backend, frontend)
	}
}

// TestTablesAreWellFormed guards the published shape itself: ids are unique and
// non-empty and every entry carries a default label, so a client can always
// render something for a known value.
func TestTablesAreWellFormed(t *testing.T) {
	t.Parallel()
	for _, table := range []struct {
		name  string
		items []enums.Item
	}{
		{name: "platforms", items: enums.Platforms()},
		{name: "moods", items: enums.Moods()},
		{name: "modes", items: enums.Modes()},
	} {
		if len(table.items) == 0 {
			t.Fatalf("%s is empty", table.name)
		}
		seen := make(map[string]bool, len(table.items))
		for _, it := range table.items {
			if it.ID == "" || it.Label == "" {
				t.Errorf("%s entry %+v must have both id and label", table.name, it)
			}
			if seen[it.ID] {
				t.Errorf("%s id %q is duplicated", table.name, it.ID)
			}
			seen[it.ID] = true
		}
	}
}

// TestTablesAreCopies asserts the accessors hand out independent slices, so a
// caller sorting its copy cannot reorder the authority table for everyone else.
func TestTablesAreCopies(t *testing.T) {
	t.Parallel()
	first := enums.Platforms()
	first[0] = enums.Item{ID: "mutated", Label: "mutated"}
	second := enums.Platforms()
	if second[0].ID != "web" {
		t.Fatalf("Platforms() shared state: second call starts with %q", second[0].ID)
	}
}