package common

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

func TestAhaHelpSettingPreservesRunAndExplicitOff(t *testing.T) {
	resource, err := os.ReadFile(filepath.Join("..", "..", "resources", "AhaHelpConfig.json"))
	if err != nil {
		t.Fatal(err)
	}
	t.Chdir(t.TempDir())
	if err := os.Mkdir("resources", 0755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join("resources", "AhaHelpConfig.json"), resource, 0644); err != nil {
		t.Fatal(err)
	}
	initial := []byte(`{"currency_wars":{"keep":{"revision":42}},"ex_ranks_unlocked":{"1204":false},"unrelated":"preserve"}`)
	if err := os.WriteFile("persistent", initial, 0644); err != nil {
		t.Fatal(err)
	}
	if level, err := ReadAhaHelpLevel(); err != nil || level != nil {
		t.Fatalf("legacy setting: %v %v", level, err)
	}
	afterRead, _ := os.ReadFile("persistent")
	if !bytes.Equal(afterRead, initial) {
		t.Fatal("read changed persistent")
	}
	levels, err := LoadAhaHelpLevels()
	if err != nil {
		t.Fatal(err)
	}
	for _, row := range levels {
		if err := SaveAhaHelpLevel(&row.BuffLevel); err != nil {
			t.Fatal(err)
		}
		selected, err := ReadAhaHelpLevel()
		if err != nil || selected == nil || *selected != row.BuffLevel {
			t.Fatalf("selected level: %v %v", selected, err)
		}
	}
	off := uint32(0)
	if err := SaveAhaHelpLevel(&off); err != nil {
		t.Fatal(err)
	}
	selected, err := ReadAhaHelpLevel()
	if err != nil || selected == nil || *selected != 0 {
		t.Fatalf("explicit off lost: %v %v", selected, err)
	}
	beforeInvalid, _ := os.ReadFile("persistent")
	invalid := ^uint32(0)
	if err := SaveAhaHelpLevel(&invalid); err == nil {
		t.Fatal("accepted absent level")
	}
	afterInvalid, _ := os.ReadFile("persistent")
	if !bytes.Equal(beforeInvalid, afterInvalid) {
		t.Fatal("invalid setting changed persistent")
	}
	if err := SaveAhaHelpLevel(nil); err != nil {
		t.Fatal(err)
	}
	root, err := readCurrencyWarsPersistentRoot()
	if err != nil {
		t.Fatal(err)
	}
	if _, ok := root["aha_help_level"]; ok {
		t.Fatal("legacy reset retained override")
	}
	for _, key := range []string{"currency_wars", "ex_ranks_unlocked", "unrelated"} {
		if len(root[key]) == 0 {
			t.Fatalf("lost %s", key)
		}
	}
}