const ranges = [
    { minRange: 1, maxRange: 75, tag: "T , Foil" },
    { minRange: 1, maxRange: 100, tag: "C , Foil" },
    { minRange: 1, maxRange: 100, tag: "C , Foil" },
    { minRange: 1, maxRange: 100, tag: "C , Foil" },
    { minRange: 1, maxRange: 100, tag: "C , Foil" },
    { minRange: 1, maxRange: 80, tag: "U , Foil" },
    { minRange: 1, maxRange: 80, tag: "U , Foil" },
    { minRange: 1, maxRange: 80, tag: "U , Foil" },
    { minRange: 1, maxRange: 100, tag: "Slot8" },
    { minRange: 1, maxRange: 10, tag: "L , Foil" },
    { minRange: 1, maxRange: 10, tag: "A , Foil" },
    { minRange: 1, maxRange: 10, tag: "Shock , Foil" },
    { minRange: 1, maxRange: 100, tag: "Slot9" },
    { minRange: 1, maxRange: 25, tag: "C Frame , Normal" },
    { minRange: 1, maxRange: 36, tag: "U Frame , Normal" },
    { minRange: 1, maxRange: 100, tag: "Slot10" },
    { minRange: 1, maxRange: 25, tag: "C Frame , Normal" },
    { minRange: 1, maxRange: 36, tag: "U Frame , Normal" },
    { minRange: 1, maxRange: 100, tag: "Slot11" },
    { minRange: 1, maxRange: 25, tag: "C Frame , Foil" },
    { minRange: 1, maxRange: 36, tag: "U Frame , Foil" },
    { minRange: 1, maxRange: 100, tag: "Slot12" },
    { minRange: 1, maxRange: 71, tag: "R , Foil" },
    { minRange: 1, maxRange: 20, tag: "M , Foil" },
    { minRange: 1, maxRange: 100, tag: "Slot13" },
    { minRange: 1, maxRange: 58, tag: "R Frame , Normal" },
    { minRange: 1, maxRange: 16, tag: "M Frame , Normal" },
    { minRange: 1, maxRange: 100, tag: "Slot14" },
    { minRange: 1, maxRange: 17, tag: "R Anime , Normal" },
    { minRange: 1, maxRange: 13, tag: "M Anime , Normal" },
    { minRange: 1, maxRange: 10, tag: "Shock , Normal" },
    { minRange: 1, maxRange: 100, tag: "Slot15" },
    { minRange: 1, maxRange: 58, tag: "R Frame , Foil" },
    { minRange: 1, maxRange: 16, tag: "M Frame , Foil" },
    { minRange: 1, maxRange: 17, tag: "R Anime , Foil" },
    { minRange: 1, maxRange: 13, tag: "M Anime , Foil" },
    { minRange: 1, maxRange: 10, tag: "Shock , Foil" },
    { minRange: 1, maxRange: 64, tag: "Serial , Foil" },
];

function incrementNonce(nonce, offset) {
  let seconds = parseInt(nonce.slice(0, 2), 10);
  let minutes = parseInt(nonce.slice(2, 4), 10);
  let hours = parseInt(nonce.slice(4, 6), 10);
  let day = parseInt(nonce.slice(6, 8), 10);
  let month = parseInt(nonce.slice(8, 10), 10);
  let year = parseInt(nonce.slice(10, 14), 10);

  seconds += offset;
  while (seconds > 59) {
    seconds -= 60;
    minutes += 1;
    if (minutes > 59) {
      minutes = 0;
      hours += 1;
      if (hours > 23) {
        hours = 0;
        day += 1;
        const daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
        if (day > daysInMonth[month - 1]) {
          day = 1;
          month += 1;
          if (month > 12) {
            month = 1;
            year += 1;
          }
        }
      }
    }
  }

  return (
    seconds.toString().padStart(2, '0') +
    minutes.toString().padStart(2, '0') +
    hours.toString().padStart(2, '0') +
    day.toString().padStart(2, '0') +
    month.toString().padStart(2, '0') +
    year.toString().padStart(4, '0')
  );
}

async function generateHmacSha512(key, message) {
  const keyBuffer = new TextEncoder().encode(key);
  const msgBuffer = new TextEncoder().encode(message);
  const cryptoKey = await crypto.subtle.importKey(
    "raw",
    keyBuffer,
    { name: "HMAC", hash: "SHA-512" },
    false,
    ["sign"]
  );
  const signature = await crypto.subtle.sign("HMAC", cryptoKey, msgBuffer);
  return new Uint8Array(signature);
}

async function generateRandomNumbers(ranges, serverSeed, clientSeed, nonce) {
  const randomNumbers = [];
  const numbersPerDigest = 16;
  const digestsNeeded = Math.ceil(ranges.length / numbersPerDigest);

  for (let digestIndex = 0; digestIndex < digestsNeeded; digestIndex++) {
    const message = `${clientSeed}:${nonce}:${digestIndex}`;
    const digest = await generateHmacSha512(serverSeed, message);
    let offset = 0;

    for (let i = 0; i < numbersPerDigest && randomNumbers.length < ranges.length; i++) {
      const range = ranges[randomNumbers.length];
      const bytes = digest.slice(offset, offset + 4);
      const view = new DataView(bytes.buffer, bytes.byteOffset, 4);
      const num = view.getUint32(0, false); // Big-endian
      const rand = Math.floor((num / 0x100000000) * (range.maxRange - range.minRange + 1)) + range.minRange;
      randomNumbers.push(rand);
      offset += 4;
    }
  }

  return randomNumbers;
}

async function mapTaggedResults(randomNumbers, ranges, serverSeed, clientSeed, nonce) {
  const seenValues = {};
  const taggedResults = [];

  for (let index = 0; index < randomNumbers.length; index++) {
    if (!ranges[index]) {
      console.error(`No range found for index ${index}`);
      continue;
    }

    const { tag = "UNKNOWN", minRange, maxRange } = ranges[index];
    let finalNumber = randomNumbers[index];
    let nonceOffset = 0;

    if (!seenValues[tag]) {
      seenValues[tag] = new Set();
    }

    while (seenValues[tag].has(finalNumber.toString())) {
      nonceOffset++;
      const newNonce = incrementNonce(nonce, nonceOffset);
      const message = `${clientSeed}:${newNonce}`;
      const digest = await generateHmacSha512(serverSeed, message);
      const bytes = digest.slice(0, 4);
      const view = new DataView(bytes.buffer, bytes.byteOffset, 4);
      const newNum = view.getUint32(0, false); // Big-endian
      finalNumber = Math.floor((newNum / 0x100000000) * (maxRange - minRange + 1)) + minRange;
    }

    seenValues[tag].add(finalNumber.toString());
    taggedResults.push({ value: finalNumber.toString(), tag });
  }

  return taggedResults;
}

async function filterResults(taggedResults, ranges, serverSeed, clientSeed, nonce) {
    let filteredResults = [];
    let nonceOffset = 0;
    const usedIndexes = new Set();

    const findAndConsume = (tag) => {
        const item = taggedResults.find((item, i) => item.tag === tag && !usedIndexes.has(i));
        if (item) usedIndexes.add(taggedResults.indexOf(item));
        return item;
    };

    const add = (item) => { if (item) filteredResults.push(item); };

    let tRetroFoil = taggedResults.filter((item, i) => item.tag === "T , Foil" && !usedIndexes.has(i));
    tRetroFoil.slice(0, 1).forEach(item => {
        usedIndexes.add(taggedResults.indexOf(item));
        filteredResults.push(item);
    });

    let cFoil = taggedResults.filter((item, i) => item.tag === "C , Foil" && !usedIndexes.has(i));
    cFoil.slice(0, 4).forEach(item => {
        usedIndexes.add(taggedResults.indexOf(item));
        filteredResults.push(item);
    });

    let uFoil = taggedResults.filter((item, i) => item.tag === "U , Foil" && !usedIndexes.has(i));
    uFoil.slice(0, 3).forEach(item => {
        usedIndexes.add(taggedResults.indexOf(item));
        filteredResults.push(item);
    });

    const slot8 = taggedResults.find(item => item.tag === "Slot8");
    let slot8Item = null;
    let slot8Tag = null;
    if (slot8) {
        const num = parseInt(slot8.value, 10);
        if (num <= 58) {
            slot8Tag = "L , Foil";
            slot8Item = findAndConsume("L , Foil");
        } else if (num <= 91) {
            slot8Tag = "A , Foil";
            slot8Item = findAndConsume("A , Foil");
        } else if (num <= 100) {
            slot8Tag = "Shock , Foil";
            slot8Item = findAndConsume("Shock , Foil");
        }
        add(slot8Item);
    }

    const slot9 = taggedResults.find(item => item.tag === "Slot9");
    let slot9Item = null;
    let slot9Tag = null;
    if (slot9) {
        const num = parseInt(slot9.value, 10);
        if (num <= 58) {
            slot9Tag = "C Frame , Normal";
            slot9Item = findAndConsume("C Frame , Normal");
        } else {
            slot9Tag = "U Frame , Normal";
            slot9Item = findAndConsume("U Frame , Normal");
        }
        add(slot9Item);
    }

    const slot10 = taggedResults.find(item => item.tag === "Slot10");
    let slot10Item = null;
    let slot10Tag = null;
    if (slot10) {
        const num = parseInt(slot10.value, 10);
        if (num <= 58) {
            slot10Tag = "C Frame , Normal";
            slot10Item = findAndConsume("C Frame , Normal");
        } else {
            slot10Tag = "U Frame , Normal";
            slot10Item = findAndConsume("U Frame , Normal");
        }
        if (slot9Item && slot10Item && slot9Tag === slot10Tag && slot9Item.value === slot10Item.value) {
            const rangeForTag = ranges.find(range => range.tag === slot10Tag);
            if (rangeForTag) {
                const { minRange, maxRange } = rangeForTag;
                let newValue;
                do {
                    nonceOffset++;
                    const newNonce = incrementNonce(nonce, nonceOffset);
                    const message = `${clientSeed}:${newNonce}`;
                    const digest = await generateHmacSha512(serverSeed, message);
                    const bytes = digest.slice(0, 4);
                    const view = new DataView(bytes.buffer, bytes.byteOffset, 4);
                    const newNum = view.getUint32(0, false); // Big-endian
                    newValue = Math.floor((newNum / 0x100000000) * (maxRange - minRange + 1)) + minRange;
                } while (newValue.toString() === slot9Item.value);
                slot10Item = { value: newValue.toString(), tag: slot10Tag };
            }
        }
        add(slot10Item);
    }

    const slot11 = taggedResults.find(item => item.tag === "Slot11");
    if (slot11) {
        const num = parseInt(slot11.value, 10);
        if (num <= 58) {
            add(findAndConsume("C Frame , Foil"));
        } else {
            add(findAndConsume("U Frame , Foil"));
        }
    }

    const slot12 = taggedResults.find(item => item.tag === "Slot12");
    if (slot12) {
        const num = parseInt(slot12.value, 10);
        if (num <= 88) {
            add(findAndConsume("R , Foil"));
        } else {
            add(findAndConsume("M , Foil"));
        }
    }

    const slot13 = taggedResults.find(item => item.tag === "Slot13");
    if (slot13) {
        const num = parseInt(slot13.value, 10);
        if (num <= 90) {
            add(findAndConsume("R Frame , Normal"));
        } else {
            add(findAndConsume("M Frame , Normal"));
        }
    }

    const slot14 = taggedResults.find(item => item.tag === "Slot14");
    if (slot14) {
        const num = parseInt(slot14.value, 10);
        if (num <= 51) {
            add(findAndConsume("R Anime , Normal"));
        } else if (num <= 72) {
            add(findAndConsume("M Anime , Normal"));
        } else {
            add(findAndConsume("Shock , Normal"));
        }
    }

    const slot15 = taggedResults.find(item => item.tag === "Slot15");
    if (slot15) {
        const num = parseInt(slot15.value, 10);
        if (num <= 66) {
            add(findAndConsume("R Frame , Foil"));
        } else if (num <= 73) {
            add(findAndConsume("M Frame , Foil"));
        } else if (num <= 86) {
            add(findAndConsume("R Anime , Foil"));
        } else if (num <= 92) {
            add(findAndConsume("M Anime , Foil"));
        } else if (num <= 99) {
            add(findAndConsume("Shock , Foil"));
        } else {
            add(findAndConsume("Serial , Foil"));
        }
    }

    return filteredResults;
}

async function setData(serverSeed, clientSeed, nonce) {
  const randomNumbers = await generateRandomNumbers(ranges, serverSeed, clientSeed, nonce);
  const taggedResults = await mapTaggedResults(randomNumbers, ranges, serverSeed, clientSeed, nonce);
  const filteredResults = await filterResults(taggedResults, ranges, serverSeed, clientSeed, nonce);

  return {
    success: true,
    result: filteredResults,
    nonce,
    serverSeed,
    clientSeed
  };
}
export { setData, ranges};
