#include <algorithm>

#include "Loot.h"

#include "CDComponentsRegistryTable.h"
#include "CDItemComponentTable.h"
#include "CDLootMatrixTable.h"
#include "CDLootTableTable.h"
#include "CDRarityTableTable.h"
#include "Character.h"
#include "Entity.h"
#include "GameMessages.h"
#include "GeneralUtils.h"
#include "InventoryComponent.h"
#include "MissionComponent.h"

LootGenerator::LootGenerator() {
    CDLootTableTable* lootTableTable = CDClientManager::Instance()->GetTable<CDLootTableTable>("LootTable");
    CDComponentsRegistryTable* componentsRegistryTable = CDClientManager::Instance()->GetTable<CDComponentsRegistryTable>("ComponentsRegistry");
    CDItemComponentTable* itemComponentTable = CDClientManager::Instance()->GetTable<CDItemComponentTable>("ItemComponent");
    CDLootMatrixTable* lootMatrixTable = CDClientManager::Instance()->GetTable<CDLootMatrixTable>("LootMatrix");
    CDRarityTableTable* rarityTableTable = CDClientManager::Instance()->GetTable<CDRarityTableTable>("RarityTable");

    // ==============================
    // Cache Item Rarities
    // ==============================

    std::vector<uint32_t> uniqueItems;

    for (const CDLootTable& loot : lootTableTable->GetEntries()) {
        uniqueItems.push_back(loot.itemid);
    }

    // filter out duplicates
    std::sort(uniqueItems.begin(), uniqueItems.end());
    uniqueItems.erase(std::unique(uniqueItems.begin(), uniqueItems.end()), uniqueItems.end());

    for (const uint32_t itemID : uniqueItems) {
        uint32_t itemComponentID = componentsRegistryTable->GetByIDAndType(itemID, COMPONENT_TYPE_ITEM);
        const CDItemComponent& item = itemComponentTable->GetItemComponentByID(itemComponentID);

        m_ItemRarities.insert({itemID, item.rarity});
    }

    // ==============================
    // Cache Rarity Tables
    // ==============================

    std::vector<uint32_t> uniqueRarityIndices;

    for (const CDRarityTable& rarity : rarityTableTable->GetEntries()) {
        uniqueRarityIndices.push_back(rarity.RarityTableIndex);
    }

    // filter out duplicates
    std::sort(uniqueRarityIndices.begin(), uniqueRarityIndices.end());
    uniqueRarityIndices.erase(std::unique(uniqueRarityIndices.begin(), uniqueRarityIndices.end()), uniqueRarityIndices.end());

    for (const uint32_t index : uniqueRarityIndices) {
        std::vector<CDRarityTable> table = rarityTableTable->Query([index](const CDRarityTable& entry) { return entry.RarityTableIndex == index; });

        RarityTable rarityTable;

        for (const CDRarityTable& entry : table) {
            RarityTableEntry rarity{entry.rarity, entry.randmax};
            rarityTable.push_back(rarity);
        }

        // sort in descending order based on randMax
        std::sort(rarityTable.begin(), rarityTable.end(), [](const RarityTableEntry& x, const RarityTableEntry& y) { return x.randMax > y.randMax; });

        m_RarityTables.insert({index, rarityTable});
    }

    // ==============================
    // Cache Loot Matrices
    // ==============================

    std::vector<uint32_t> uniqueMatrixIndices;

    for (const CDLootMatrix& matrix : lootMatrixTable->GetEntries()) {
        uniqueMatrixIndices.push_back(matrix.LootMatrixIndex);
    }

    // filter out duplicates
    std::sort(uniqueMatrixIndices.begin(), uniqueMatrixIndices.end());
    uniqueMatrixIndices.erase(std::unique(uniqueMatrixIndices.begin(), uniqueMatrixIndices.end()), uniqueMatrixIndices.end());

    for (const uint32_t index : uniqueMatrixIndices) {
        std::vector<CDLootMatrix> matrix = lootMatrixTable->Query([index](const CDLootMatrix& entry) { return entry.LootMatrixIndex == index; });

        LootMatrix lootMatrix;

        for (const CDLootMatrix& entry : matrix) {
            LootMatrixEntry matrixEntry{entry.LootTableIndex, entry.RarityTableIndex, entry.percent, entry.minToDrop, entry.maxToDrop};
            lootMatrix.push_back(matrixEntry);
        }

        m_LootMatrices.insert({index, lootMatrix});
    }

    // ==============================
    // Cache Loot Tables
    // ==============================

    std::vector<uint32_t> uniqueTableIndices;

    for (const CDLootTable& entry : lootTableTable->GetEntries()) {
        uniqueTableIndices.push_back(entry.LootTableIndex);
    }

    // filter out duplicates
    std::sort(uniqueTableIndices.begin(), uniqueTableIndices.end());
    uniqueTableIndices.erase(std::unique(uniqueTableIndices.begin(), uniqueTableIndices.end()), uniqueTableIndices.end());

    for (const uint32_t index : uniqueTableIndices) {
        std::vector<CDLootTable> entries = lootTableTable->Query([index](const CDLootTable& entry) { return entry.LootTableIndex == index; });

        LootTable lootTable;

        for (const CDLootTable& entry : entries) {
            LootTableEntry tableEntry{(LOT)entry.itemid, entry.MissionDrop};
            lootTable.push_back(tableEntry);
        }

        // sort by item rarity descending
        std::sort(lootTable.begin(), lootTable.end(), [&](const LootTableEntry& x, const LootTableEntry& y) {
            return m_ItemRarities[x.itemID] > m_ItemRarities[y.itemID];
        });

        m_LootTables.insert({index, lootTable});
    }
}

std::unordered_map<LOT, int32_t> LootGenerator::RollLootMatrix(Entity* player, uint32_t matrixIndex) {
    auto* missionComponent = player->GetComponent<MissionComponent>();

    std::unordered_map<LOT, int32_t> drops;

    const LootMatrix& matrix = m_LootMatrices[matrixIndex];

    for (const LootMatrixEntry& entry : matrix) {
        if (GeneralUtils::GenerateRandomNumber<float>(0, 1) < entry.percent) {
            const LootTable& lootTable = m_LootTables[entry.lootTableIndex];
            const RarityTable& rarityTable = m_RarityTables[entry.rarityTableIndex];

            uint32_t dropCount = GeneralUtils::GenerateRandomNumber<uint32_t>(entry.minDrop, entry.maxDrop);
            for (uint32_t i = 0; i < dropCount; ++i) {
                uint32_t maxRarity = 1;

                float rarityRoll = GeneralUtils::GenerateRandomNumber<float>(0, 1);

                for (const RarityTableEntry& rarity : rarityTable) {
                    if (rarity.randMax >= rarityRoll) {
                        maxRarity = rarity.rarity;
                    } else {
                        break;
                    }
                }

                bool rarityFound = false;
                std::vector<LootTableEntry> possibleDrops;

                for (const LootTableEntry& loot : lootTable) {
                    uint32_t rarity = m_ItemRarities[loot.itemID];

                    if (rarity == maxRarity) {
                        possibleDrops.push_back(loot);
                        rarityFound = true;
                    } else if (rarity < maxRarity && !rarityFound) {
                        possibleDrops.push_back(loot);
                        maxRarity = rarity;
                    }
                }

                if (possibleDrops.size() > 0) {
                    LootTableEntry drop = possibleDrops[GeneralUtils::GenerateRandomNumber<uint32_t>(0, possibleDrops.size() - 1)];

                    // filter out uneeded mission items
                    if (drop.isMissionDrop && !missionComponent->RequiresItem(drop.itemID))
                        continue;

                    // convert faction token proxy
                    if (drop.itemID == 13763) {
                        if (missionComponent->GetMissionState(545) == MissionState::MISSION_STATE_COMPLETE)
                            drop.itemID = 8318; // "Assembly Token"
                        else if (missionComponent->GetMissionState(556) == MissionState::MISSION_STATE_COMPLETE)
                            drop.itemID = 8321; // "Venture League Token"
                        else if (missionComponent->GetMissionState(567) == MissionState::MISSION_STATE_COMPLETE)
                            drop.itemID = 8319; // "Sentinels Token"
                        else if (missionComponent->GetMissionState(578) == MissionState::MISSION_STATE_COMPLETE)
                            drop.itemID = 8320; // "Paradox Token"
                    }

                    if (drop.itemID == 13763) {
                        continue;
                    } // check if we aren't in faction

                    if (drops.find(drop.itemID) == drops.end()) {
                        drops.insert({drop.itemID, 1});
                    } else {
                        ++drops[drop.itemID];
                    }
                }
            }
        }
    }

    return drops;
}

std::unordered_map<LOT, int32_t> LootGenerator::RollLootMatrix(uint32_t matrixIndex) {
    std::unordered_map<LOT, int32_t> drops;

    const LootMatrix& matrix = m_LootMatrices[matrixIndex];

    for (const LootMatrixEntry& entry : matrix) {
        if (GeneralUtils::GenerateRandomNumber<float>(0, 1) < entry.percent) {
            const LootTable& lootTable = m_LootTables[entry.lootTableIndex];
            const RarityTable& rarityTable = m_RarityTables[entry.rarityTableIndex];

            uint32_t dropCount = GeneralUtils::GenerateRandomNumber<uint32_t>(entry.minDrop, entry.maxDrop);
            for (uint32_t i = 0; i < dropCount; ++i) {
                uint32_t maxRarity = 1;

                float rarityRoll = GeneralUtils::GenerateRandomNumber<float>(0, 1);

                for (const RarityTableEntry& rarity : rarityTable) {
                    if (rarity.randMax >= rarityRoll) {
                        maxRarity = rarity.rarity;
                    } else {
                        break;
                    }
                }

                bool rarityFound = false;
                std::vector<LootTableEntry> possibleDrops;

                for (const LootTableEntry& loot : lootTable) {
                    uint32_t rarity = m_ItemRarities[loot.itemID];

                    if (rarity == maxRarity) {
                        possibleDrops.push_back(loot);
                        rarityFound = true;
                    } else if (rarity < maxRarity && !rarityFound) {
                        possibleDrops.push_back(loot);
                        maxRarity = rarity;
                    }
                }

                if (possibleDrops.size() > 0) {
                    const LootTableEntry& drop = possibleDrops[GeneralUtils::GenerateRandomNumber<uint32_t>(0, possibleDrops.size() - 1)];

                    if (drops.find(drop.itemID) == drops.end()) {
                        drops.insert({drop.itemID, 1});
                    } else {
                        ++drops[drop.itemID];
                    }
                }
            }
        }
    }

    return drops;
}

void LootGenerator::GiveLoot(Entity* player, uint32_t matrixIndex) {
    player = player->GetOwner(); // If the owner is overwritten, we collect that here

    std::unordered_map<LOT, int32_t> result = RollLootMatrix(player, matrixIndex);

    GiveLoot(player, result);
}

void LootGenerator::GiveLoot(Entity* player, std::unordered_map<LOT, int32_t>& result) {
    player = player->GetOwner(); // if the owner is overwritten, we collect that here

    auto* inventoryComponent = player->GetComponent<InventoryComponent>();

    if (!inventoryComponent)
        return;

    for (const auto& pair : result) {
        inventoryComponent->AddItem(pair.first, pair.second);
    }
}

void LootGenerator::GiveActivityLoot(Entity* player, Entity* source, uint32_t activityID, int32_t rating) {
    CDActivityRewardsTable* activityRewardsTable = CDClientManager::Instance()->GetTable<CDActivityRewardsTable>("ActivityRewards");
    std::vector<CDActivityRewards> activityRewards = activityRewardsTable->Query([activityID](CDActivityRewards entry) { return (entry.objectTemplate == activityID); });

    const CDActivityRewards* selectedReward = nullptr;
    for (const auto& activityReward : activityRewards) {
        if (activityReward.activityRating <= rating && (selectedReward == nullptr || activityReward.activityRating > selectedReward->activityRating)) {
            selectedReward = &activityReward;
        }
    }

    if (!selectedReward)
        return;

    uint32_t minCoins = 0;
    uint32_t maxCoins = 0;

    CDCurrencyTableTable* currencyTableTable = CDClientManager::Instance()->GetTable<CDCurrencyTableTable>("CurrencyTable");
    std::vector<CDCurrencyTable> currencyTable = currencyTableTable->Query([selectedReward](CDCurrencyTable entry) { return (entry.currencyIndex == selectedReward->CurrencyIndex && entry.npcminlevel == 1); });

    if (currencyTable.size() > 0) {
        minCoins = currencyTable[0].minvalue;
        maxCoins = currencyTable[0].maxvalue;
    }

    GiveLoot(player, selectedReward->LootMatrixIndex);

    uint32_t coins = (int)(minCoins + GeneralUtils::GenerateRandomNumber<float>(0, 1) * (maxCoins - minCoins));

    auto* character = player->GetCharacter();

    character->SetCoins(character->GetCoins() + coins);
}

void LootGenerator::DropLoot(Entity* player, Entity* killedObject, uint32_t matrixIndex, uint32_t minCoins, uint32_t maxCoins) {
    player = player->GetOwner(); // if the owner is overwritten, we collect that here

    auto* inventoryComponent = player->GetComponent<InventoryComponent>();

    if (!inventoryComponent)
        return;

    std::unordered_map<LOT, int32_t> result = RollLootMatrix(player, matrixIndex);

    DropLoot(player, killedObject, result, minCoins, maxCoins);
}

void LootGenerator::DropLoot(Entity* player, Entity* killedObject, std::unordered_map<LOT, int32_t>& result, uint32_t minCoins, uint32_t maxCoins) {
    player = player->GetOwner(); // if the owner is overwritten, we collect that here

    auto* inventoryComponent = player->GetComponent<InventoryComponent>();

    if (!inventoryComponent)
        return;

    const auto spawnPosition = killedObject->GetPosition();

    const auto source = killedObject->GetObjectID();

    for (const auto& pair : result) {
        for (int i = 0; i < pair.second; ++i) {
            GameMessages::SendDropClientLoot(player, source, pair.first, 0, spawnPosition, 1);
        }
    }

    uint32_t coins = (int)(minCoins + GeneralUtils::GenerateRandomNumber<float>(0, 1) * (maxCoins - minCoins));

    GameMessages::SendDropClientLoot(player, source, LOT_NULL, coins, spawnPosition);
}

void LootGenerator::DropActivityLoot(Entity* player, Entity* source, uint32_t activityID, int32_t rating) {
    CDActivityRewardsTable* activityRewardsTable = CDClientManager::Instance()->GetTable<CDActivityRewardsTable>("ActivityRewards");
    std::vector<CDActivityRewards> activityRewards = activityRewardsTable->Query([activityID](CDActivityRewards entry) { return (entry.objectTemplate == activityID); });

    const CDActivityRewards* selectedReward = nullptr;
    for (const auto& activityReward : activityRewards) {
        if (activityReward.activityRating <= rating && (selectedReward == nullptr || activityReward.activityRating > selectedReward->activityRating)) {
            selectedReward = &activityReward;
        }
    }

    if (selectedReward == nullptr) {
        return;
    }

    uint32_t minCoins = 0;
    uint32_t maxCoins = 0;

    CDCurrencyTableTable* currencyTableTable = CDClientManager::Instance()->GetTable<CDCurrencyTableTable>("CurrencyTable");
    std::vector<CDCurrencyTable> currencyTable = currencyTableTable->Query([selectedReward](CDCurrencyTable entry) { return (entry.currencyIndex == selectedReward->CurrencyIndex && entry.npcminlevel == 1); });

    if (currencyTable.size() > 0) {
        minCoins = currencyTable[0].minvalue;
        maxCoins = currencyTable[0].maxvalue;
    }

    DropLoot(player, source, selectedReward->LootMatrixIndex, minCoins, maxCoins);
}