using System;
using System.IO;
using System.Globalization;

const string targetDateStr = "03-11-2025";
const int startId = 92571453;
const int delayMs = 500;
bool exportProfiles = true;

const string outPath = "io/date_range.tsv";
DateTime targetDate = DateTime.ParseExact(targetDateStr, "dd-MM-yyyy", CultureInfo.InvariantCulture).Date;

Log($"Searching for {targetDateStr}");

int id = startId;
int step = 100000;
int foundId = -1;
int prevDaysDiff = 0;

while (foundId == -1 && step >= 100) {
  try {
    var profile = GetProfile(id);
    DateTime created = DateTime.ParseExact(profile.Created, "dd-MM-yyyy", CultureInfo.InvariantCulture).Date;
    int daysDiff = (targetDate - created).Days;
    
    Log($"ID {id}: {created:dd-MM-yyyy} ({daysDiff}d) step={step}");
    
    if (created == targetDate) {
      foundId = id;
      break;
    }
    
    if (prevDaysDiff != 0 && ((prevDaysDiff > 0 && daysDiff < 0) || (prevDaysDiff < 0 && daysDiff > 0))) {
      step = Math.Max(step / 2, 100);
      Log($"Crossed over! step={step}");
    } else {
      if (Math.Abs(daysDiff) < 7) step = 1000;
      else if (Math.Abs(daysDiff) < 30) step = 10000;
      else step = 100000;
    }
    
    prevDaysDiff = daysDiff;
    id += daysDiff > 0 ? step : -step;
  } catch {
    Log($"Error at {id}, skipping");
    id += step > 0 ? 1 : -1;
    step = Math.Max(Math.Abs(step) / 2, 100);
  }
  Delay(delayMs);
}

if (foundId == -1) {
  Log("Date not found");
  return;
}

Log($"Found {foundId}, finding first...");

int firstId = foundId;
step = -50000;

while (Math.Abs(step) >= 1) {
  int checkId = firstId + step;
  if (checkId < 1) {
    step = step / 2;
    continue;
  }
  
  try {
    var profile = GetProfile(checkId);
    DateTime created = DateTime.ParseExact(profile.Created, "dd-MM-yyyy", CultureInfo.InvariantCulture).Date;
    
    Log($"First check {checkId}: {created:dd-MM-yyyy} step={step}");
    
    if (created == targetDate) {
      firstId = checkId;
      Log($">> New first: {firstId}");
    } else if (created < targetDate) {
      step = step / 2;
      Log($"Too old, step={step}");
    } else {
      firstId += step;
    }
  } catch {
    Log($"Error {checkId}, reducing step");
    step = step / 2;
  }
  Delay(delayMs);
}

Log($"Finding last from {firstId}...");

int lastId = firstId;
step = 50000;

while (Math.Abs(step) >= 1) {
  int checkId = lastId + step;
  
  try {
    var profile = GetProfile(checkId);
    DateTime created = DateTime.ParseExact(profile.Created, "dd-MM-yyyy", CultureInfo.InvariantCulture).Date;
    
    Log($"Last check {checkId}: {created:dd-MM-yyyy} step={step}");
    
    if (created == targetDate) {
      lastId = checkId;
      Log($">> New last: {lastId}");
    } else if (created > targetDate) {
      step = step / 2;
      Log($"Too new, step={step}");
    } else {
      lastId += step;
    }
  } catch {
    Log($"Error {checkId}, reducing step");
    step = step / 2;
  }
  Delay(delayMs);
}

int total = lastId - firstId + 1;
Log($"Range: {firstId}-{lastId} ({total} accounts)");

if (!exportProfiles) {
  Log("Export disabled, done");
  return;
}

using (var outs = new StreamWriter(outPath)) {
  outs.WriteLine("ID\tName\tCreated\tLastLogin\tActivityPts\tFriends");
  int exported = 0;
  int skipped = 0;
  
  for (int exportId = firstId; exportId <= lastId; exportId++) {
    try {
      var profile = GetProfile(exportId);
      
      DateTime created = DateTime.ParseExact(profile.Created, "dd-MM-yyyy", CultureInfo.InvariantCulture).Date;
      if (created != targetDate) {
        Log($"Wrong date at {exportId}, stopping");
        break;
      }
      
      string lastLogin = profile.LastLogin < TimeSpan.Zero 
        ? "invisible" 
        : (DateTime.Now - profile.LastLogin).ToString("yyyy/MM/dd HH:mm:ss");
      
      outs.WriteLine($"{profile.Id}\t{profile.Name}\t{profile.Created}\t{lastLogin}\t{profile.ActivityPoints}\t{profile.Friends}");
      exported++;
      
      if (exported % 100 == 0) Log($"Exported {exported}/{total}");
    } catch {
      skipped++;
    }
    Delay(delayMs);
  }
  
  Log($"Done: {exported} exported, {skipped} skipped");
}