"""Exercise production terrain selection with engine world boundaries doubled."""
from policy_harness import ROOT, body, run

p = ROOT / 'addons/core/Scripts/Game/ERR/00_Core/ERR_Telemetry.c'
method = body(p, 'protected string Terrain(')
for a, b in [('protected ', ''), ('GetGame().', 'GetGame()->'),
             ('GetWorld().', 'GetWorld()->'), ('ERR_TerrainDisplayName.Resolve', 'Resolve')]:
    method = method.replace(a, b)
run(r'''
#include <cassert>
#include <string>
struct string:std::string {using std::string::string;bool IsEmpty(){return empty();}};
struct World {
 string root="$armareforger:Worlds/Eden/Eden.ent";int count=1;
 int GetNumSubScenes(){return count;}
 string GetSubSceneName(int index){assert(index==0);return root;}
} world;
struct Game {
 World* loaded=&world;string scenario="$armareforger:Worlds/GameMaster/GameMaster.ent";
 World* GetWorld(){return loaded;}string GetWorldFile(){return scenario;}
} game;
Game* GetGame(){return &game;}
// The existing mission-title resolver is a separate native resource boundary.
string Resolve(string resource){
 if(resource=="$armareforger:Worlds/Eden/Eden.ent")return "Everon";
 if(resource=="$custom:Worlds/Nogova.ent")return "Nogova";
 return resource;
}
struct Telemetry {
''' + method + r'''
};
int main(){
 Telemetry service;
 assert(service.Terrain()=="Everon");
 // Same generic scenario name, different underlying island.
 world.root="$custom:Worlds/Nogova.ent";
 assert(service.Terrain()=="Nogova");
 // Follow the loaded scene, even while scenario metadata is stale.
 game.scenario="$armareforger:Worlds/GameMaster/GM_Eden.ent";
 assert(service.Terrain()=="Nogova");
 world.count=0;assert(service.Terrain()==game.scenario);
 world.count=1;world.root="";assert(service.Terrain()==game.scenario);
 game.loaded=nullptr;assert(service.Terrain()==game.scenario);
}
''')
print('PASS: telemetry uses the loaded island beneath scenario wrappers and handles unavailable roots')