// Step 1920: LSPRequestThrottler
// Debounces per-URI requests to prevent flooding language servers.
//
//  t1: no prior record → shouldAllow true
//  t2: within debounce window → shouldAllow false
//  t3: after debounce window expires → shouldAllow true
//  t4: reset clears uri; resetAll clears everything
//  t5: lastTimestamp returns -1 for missing, correct value after record

#include "LSPRequestThrottler.h"
#include <iostream>

namespace ws = whetstone;

static int p=0,f=0;
#define T(n) { std::cout<<"  "<<#n<<"... "; }
#define P() { std::cout<<"PASS\n"; ++p; }
#define F(m) { std::cout<<"FAIL: "<<m<<"\n"; ++f; }
#define C(c,m) if(!(c)){F(m);return;}

void t1(){
    T(no_prior_record_allows);
    ws::LSPRequestThrottler t;
    C(t.shouldAllow("file:///a.go","textDocument/didChange",1000,500), "no record allows");
    P();
}

void t2(){
    T(within_debounce_window_blocks);
    ws::LSPRequestThrottler t;
    t.record("file:///a.go","textDocument/didChange",1000);
    // 200ms later, 500ms debounce → block
    C(!t.shouldAllow("file:///a.go","textDocument/didChange",1200,500), "within window blocked");
    // different method: not throttled
    C( t.shouldAllow("file:///a.go","textDocument/hover",1200,500), "different method allowed");
    // different uri: not throttled
    C( t.shouldAllow("file:///b.go","textDocument/didChange",1200,500), "different uri allowed");
    P();
}

void t3(){
    T(after_debounce_window_allows);
    ws::LSPRequestThrottler t;
    t.record("file:///a.go","textDocument/didChange",1000);
    // exactly at boundary: 1000+500=1500 → allow (>=)
    C( t.shouldAllow("file:///a.go","textDocument/didChange",1500,500), "at boundary allowed");
    // past boundary
    C( t.shouldAllow("file:///a.go","textDocument/didChange",1600,500), "past boundary allowed");
    P();
}

void t4(){
    T(reset_and_resetAll);
    ws::LSPRequestThrottler t;
    t.record("file:///a.go","textDocument/didChange",1000);
    t.record("file:///b.go","textDocument/didChange",1000);
    t.reset("file:///a.go");
    C( t.shouldAllow("file:///a.go","textDocument/didChange",1100,500), "a.go reset → allowed");
    C(!t.shouldAllow("file:///b.go","textDocument/didChange",1100,500), "b.go still throttled");
    t.resetAll();
    C( t.shouldAllow("file:///b.go","textDocument/didChange",1100,500), "b.go allowed after resetAll");
    P();
}

void t5(){
    T(lastTimestamp);
    ws::LSPRequestThrottler t;
    C(t.lastTimestamp("file:///a.go","textDocument/didChange") == -1, "no record returns -1");
    t.record("file:///a.go","textDocument/didChange",9999);
    C(t.lastTimestamp("file:///a.go","textDocument/didChange") == 9999, "correct timestamp");
    C(t.lastTimestamp("file:///a.go","textDocument/hover") == -1, "different method -1");
    P();
}

int main(){
    std::cout << "Step 1920: LSPRequestThrottler\n";
    t1(); t2(); t3(); t4(); t5();
    std::cout << "\n" << p << "/" << (p+f) << " passed\n";
    return f > 0 ? 1 : 0;
}