#include "Mission.h"

#include <ctime>

#include "CDClientManager.h"
#include "Character.h"
#include "CharacterComponent.h"
#include "DestroyableComponent.h"
#include "EntityManager.h"
#include "Game.h"
#include "GameMessages.h"
#include "Mail.h"
#include "MissionComponent.h"
#include "dLocale.h"
#include "dLogger.h"
#include "dServer.h"

Mission::Mission(MissionComponent* missionComponent, const uint32_t missionId) {
    m_MissionComponent = missionComponent;

    m_Completions = 0;

    m_Timestamp = 0;

    m_Reward = 0;

    m_State = MissionState::MISSION_STATE_UNKNOWN;

    auto* missionsTable = CDClientManager::Instance()->GetTable<CDMissionsTable>("Missions");

    info = missionsTable->GetPtrByMissionID(missionId);

    if (info == &CDMissionsTable::Default) {
        Game::logger->Log("Missions", "Failed to find mission (%i)!\n", missionId);

        return;
    }

    auto* tasksTable = CDClientManager::Instance()->GetTable<CDMissionTasksTable>("MissionTasks");

    auto tasks = tasksTable->GetByMissionID(missionId);

    for (auto i = 0U; i < tasks.size(); ++i) {
        auto* info = tasks[i];

        auto* task = new MissionTask(this, info, i);

        m_Tasks.push_back(task);
    }
}

void Mission::LoadFromXml(tinyxml2::XMLElement* element) {
    // Start custom XML
    if (element->Attribute("state") != nullptr) {
        m_State = static_cast<MissionState>(std::stoul(element->Attribute("state")));
    }
    // End custom XML

    if (element->Attribute("cct") != nullptr) {
        m_Completions = std::stoul(element->Attribute("cct"));

        m_Timestamp = std::stoul(element->Attribute("cts"));

        if (IsComplete()) {
            return;
        }
    }

    auto* task = element->FirstChildElement();

    auto index = 0U;

    while (task != nullptr) {
        if (index >= m_Tasks.size()) {
            break;
        }

        const auto type = m_Tasks[index]->GetType();

        if (type == MissionTaskType::MISSION_TASK_TYPE_ENVIRONMENT ||
            type == MissionTaskType::MISSION_TASK_TYPE_VISIT_PROPERTY) {
            std::vector<uint32_t> uniques;

            const auto value = std::stoul(task->Attribute("v"));

            m_Tasks[index]->SetProgress(value, false);

            task = task->NextSiblingElement();

            while (task != nullptr) {
                const auto unique = std::stoul(task->Attribute("v"));

                uniques.push_back(unique);

                if (m_MissionComponent != nullptr && type == MissionTaskType::MISSION_TASK_TYPE_ENVIRONMENT) {
                    m_MissionComponent->AddCollectible(unique);
                }

                task = task->NextSiblingElement();
            }

            m_Tasks[index]->SetUnique(uniques);

            m_Tasks[index]->SetProgress(uniques.size(), false);

            break;
        } else {
            const auto value = std::stoul(task->Attribute("v"));

            m_Tasks[index]->SetProgress(value, false);

            task = task->NextSiblingElement();
        }

        index++;
    }
}

void Mission::UpdateXml(tinyxml2::XMLElement* element) {
    // Start custom XML
    element->SetAttribute("state", static_cast<unsigned int>(m_State));
    // End custom XML

    element->DeleteChildren();

    element->SetAttribute("id", static_cast<unsigned int>(info->id));

    if (m_Completions > 0) {
        element->SetAttribute("cct", static_cast<unsigned int>(m_Completions));

        element->SetAttribute("cts", static_cast<unsigned int>(m_Timestamp));

        if (IsComplete()) {
            return;
        }
    }

    for (auto* task : m_Tasks) {
        if (task->GetType() == MissionTaskType::MISSION_TASK_TYPE_ENVIRONMENT ||
            task->GetType() == MissionTaskType::MISSION_TASK_TYPE_VISIT_PROPERTY) {

            auto* child = element->GetDocument()->NewElement("sv");

            child->SetAttribute("v", static_cast<unsigned int>(task->GetProgress()));

            element->LinkEndChild(child);

            for (auto unique : task->GetUnique()) {
                auto* uniqueElement = element->GetDocument()->NewElement("sv");

                uniqueElement->SetAttribute("v", static_cast<unsigned int>(unique));

                element->LinkEndChild(uniqueElement);
            }

            break;
        }
        auto* child = element->GetDocument()->NewElement("sv");

        child->SetAttribute("v", static_cast<unsigned int>(task->GetProgress()));

        element->LinkEndChild(child);
    }
}

bool Mission::IsValidMission(const uint32_t missionId) {
    auto* table = CDClientManager::Instance()->GetTable<CDMissionsTable>("Missions");

    const auto missions = table->Query([=](const CDMissions& entry) {
        return entry.id == static_cast<int>(missionId);
    });

    return !missions.empty();
}

bool Mission::IsValidMission(const uint32_t missionId, CDMissions& info) {
    auto* table = CDClientManager::Instance()->GetTable<CDMissionsTable>("Missions");

    const auto missions = table->Query([=](const CDMissions& entry) {
        return entry.id == static_cast<int>(missionId);
    });

    if (missions.empty()) {
        return false;
    }

    info = missions[0];

    return true;
}

Entity* Mission::GetAssociate() const {
    return m_MissionComponent->GetParent();
}

User* Mission::GetUser() const {
    return GetAssociate()->GetParentUser();
}

uint32_t Mission::GetMissionId() const {
    return info->id;
}

const CDMissions& Mission::GetClientInfo() const {
    return *info;
}

uint32_t Mission::GetCompletions() const {
    return m_Completions;
}

uint32_t Mission::GetTimestamp() const {
    return m_Timestamp;
}

LOT Mission::GetReward() const {
    return m_Reward;
}

std::vector<MissionTask*> Mission::GetTasks() const {
    return m_Tasks;
}

MissionState Mission::GetMissionState() const {
    return m_State;
}

bool Mission::IsAchievement() const {
    return !info->isMission;
}

bool Mission::IsMission() const {
    return info->isMission;
}

bool Mission::IsRepeatable() const {
    return info->repeatable;
}

bool Mission::IsComplete() const {
    return m_State == MissionState::MISSION_STATE_COMPLETE;
}

bool Mission::IsActive() const {
    return m_State == MissionState::MISSION_STATE_ACTIVE || m_State == MissionState::MISSION_STATE_COMPLETE_AVAILABLE;
}

void Mission::MakeActive() {
    SetMissionState(m_Completions == 0 ? MissionState::MISSION_STATE_ACTIVE : MissionState::MISSION_STATE_COMPLETE_ACTIVE);
}

bool Mission::IsReadyToComplete() const {
    return m_State == MissionState::MISSION_STATE_READY_TO_COMPLETE || m_State == MissionState::MISSION_STATE_COMPLETE_READY_TO_COMPLETE;
}

void Mission::MakeReadyToComplete() {
    SetMissionState(m_Completions == 0 ? MissionState::MISSION_STATE_READY_TO_COMPLETE : MissionState::MISSION_STATE_COMPLETE_READY_TO_COMPLETE);
}

bool Mission::IsAvalible() const {
    return m_State == MissionState::MISSION_STATE_AVAILABLE || m_State == MissionState::MISSION_STATE_COMPLETE_AVAILABLE;
}

bool Mission::IsFetchMission() const {
    return m_Tasks.size() == 1 && m_Tasks[0]->GetType() == MissionTaskType::MISSION_TASK_TYPE_MISSION_INTERACTION;
}

void Mission::MakeAvalible() {
    SetMissionState(m_Completions == 0 ? MissionState::MISSION_STATE_AVAILABLE : MissionState::MISSION_STATE_COMPLETE_AVAILABLE);
}

void Mission::Accept() {
    SetMissionTypeState(MissionLockState::MISSION_LOCK_NEW, info->defined_type, info->defined_subtype);

    SetMissionState(m_Completions > 0 ? MissionState::MISSION_STATE_COMPLETE_ACTIVE : MissionState::MISSION_STATE_ACTIVE);

    Catchup();
}

void Mission::Complete(const bool yieldRewards) {
    if (m_State != MissionState::MISSION_STATE_ACTIVE && m_State != MissionState::MISSION_STATE_COMPLETE_ACTIVE) {
        Accept();
    }

    for (auto* task : m_Tasks) {
        task->Complete();
    }

    SetMissionState(MissionState::MISSION_STATE_REWARDING, true);

    if (yieldRewards) {
        YieldRewards();
    }

    SetMissionState(MissionState::MISSION_STATE_COMPLETE);

    m_Completions++;

    m_Timestamp = std::time(nullptr);

    auto* entity = GetAssociate();

    if (entity == nullptr) {
        return;
    }

    auto* characterComponent = entity->GetComponent<CharacterComponent>();
    if (characterComponent != nullptr) {
        characterComponent->TrackMissionCompletion(!info->isMission);
    }

    auto* missionComponent = entity->GetComponent<MissionComponent>();

    missionComponent->Progress(MissionTaskType::MISSION_TASK_TYPE_MISSION_COMPLETE, info->id);

    auto* missionEmailTable = CDClientManager::Instance()->GetTable<CDMissionEmailTable>("MissionEmail");

    const auto missionId = GetMissionId();

    const auto missionEmails = missionEmailTable->Query([missionId](const CDMissionEmail& entry) {
        return entry.missionID == missionId;
    });

    for (const auto& email : missionEmails) {
        const auto missionEmailBase = "MissionEmail_" + std::to_string(email.ID) + "_";

        const auto senderLocale = missionEmailBase + "senderName";
        const auto announceLocale = missionEmailBase + "announceText";

        if (email.messageType == 1 && Game::locale->HasPhrase(senderLocale)) {
            const auto subject = dLocale::GetTemplate(missionEmailBase + "subjectText");
            const auto body = dLocale::GetTemplate(missionEmailBase + "bodyText");
            const auto sender = dLocale::GetTemplate(senderLocale);

            Mail::SendMail(LWOOBJID_EMPTY, sender, GetAssociate(), subject, body, email.attachmentLOT, 1);
        }
    }
}

void Mission::CheckCompletion() {
    for (auto* task : m_Tasks) {
        if (!task->IsComplete()) {
            return;
        }
    }

    if (IsAchievement()) {
        Complete();

        return;
    }

    SetMissionState(MissionState::MISSION_STATE_READY_TO_COMPLETE);
}

void Mission::Catchup() {
    auto* entity = GetAssociate();

    auto* inventory = static_cast<InventoryComponent*>(entity->GetComponent(COMPONENT_TYPE_INVENTORY));

    for (auto* task : m_Tasks) {
        const auto type = task->GetType();

        if (type == MissionTaskType::MISSION_TASK_TYPE_ITEM_COLLECTION) {
            for (auto target : task->GetAllTargets()) {
                const auto count = inventory->GetLotCountNonTransfer(target);

                for (auto i = 0U; i < count; ++i) {
                    task->Progress(target);
                }
            }
        }

        if (type == MissionTaskType::MISSION_TASK_TYPE_PLAYER_FLAG) {
            for (auto target : task->GetAllTargets()) {
                const auto flag = GetUser()->GetLastUsedChar()->GetPlayerFlag(target);

                if (!flag) {
                    continue;
                }

                task->Progress(target);

                if (task->IsComplete()) {
                    break;
                }
            }
        }
    }
}

void Mission::YieldRewards() {
    auto* entity = GetAssociate();

    if (entity == nullptr) {
        return;
    }

    auto* character = GetUser()->GetLastUsedChar();

    auto* inventoryComponent = entity->GetComponent<InventoryComponent>();
    auto* characterComponent = entity->GetComponent<CharacterComponent>();
    auto* destroyableComponent = entity->GetComponent<DestroyableComponent>();
    auto* missionComponent = entity->GetComponent<MissionComponent>();

    // Remove mission items
    for (auto* task : m_Tasks) {
        if (task->GetType() != MissionTaskType::MISSION_TASK_TYPE_ITEM_COLLECTION) {
            continue;
        }

        const auto& param = task->GetParameters();

        if (param.empty() || (param[0] & 1) == 0) // Should items be removed?
        {
            for (const auto target : task->GetAllTargets()) {
                inventoryComponent->RemoveItem(target, task->GetClientInfo().targetValue);

                missionComponent->Progress(MissionTaskType::MISSION_TASK_TYPE_ITEM_COLLECTION, target, LWOOBJID_EMPTY, "", -task->GetClientInfo().targetValue);
            }
        }
    }

    if (info->LegoScore > 0) {
        characterComponent->SetUScore(characterComponent->GetUScore() + info->LegoScore);

        if (info->isMission) {
            GameMessages::SendModifyLEGOScore(entity, entity->GetSystemAddress(), info->LegoScore, 2);
        }
    }

    if (m_Completions > 0) {
        std::vector<std::pair<LOT, uint32_t>> items;

        items.emplace_back(info->reward_item1_repeatable, info->reward_item1_repeat_count);
        items.emplace_back(info->reward_item2_repeatable, info->reward_item2_repeat_count);
        items.emplace_back(info->reward_item3_repeatable, info->reward_item3_repeat_count);
        items.emplace_back(info->reward_item4_repeatable, info->reward_item4_repeat_count);

        for (const auto& pair : items) {
            // Some missions reward zero of an item and so they must be allowed through this clause,
            // hence pair.second < 0 instead of pair.second <= 0.
            if (pair.second < 0 || (m_Reward > 0 && pair.first != m_Reward)) {
                continue;
            }

            // If a mission rewards zero of an item, make it reward 1.
            auto count = pair.second > 0 ? pair.second : 1;

            // Sanity check, 6 is the max any mission yields
            if (count > 6) {
                count = 0;
            }

            inventoryComponent->AddItem(pair.first, count);
        }

        if (info->reward_currency_repeatable > 0) {
            character->SetCoins(character->GetCoins() + info->reward_currency_repeatable, LOOT_SOURCE_MISSION);
        }

        return;
    }

    std::vector<std::pair<LOT, int32_t>> items;

    items.emplace_back(info->reward_item1, info->reward_item1_count);
    items.emplace_back(info->reward_item2, info->reward_item2_count);
    items.emplace_back(info->reward_item3, info->reward_item3_count);
    items.emplace_back(info->reward_item4, info->reward_item4_count);

    for (const auto& pair : items) {
        // Some missions reward zero of an item and so they must be allowed through this clause,
        // hence pair.second < 0 instead of pair.second <= 0.
        if (pair.second < 0 || (m_Reward > 0 && pair.first != m_Reward)) {
            continue;
        }
        
        // If a mission rewards zero of an item, make it reward 1.
        auto count = pair.second > 0 ? pair.second : 1;

        // Sanity check, 6 is the max any mission yields
        if (count > 6) {
            count = 0;
        }

        inventoryComponent->AddItem(pair.first, count);
    }

    if (info->reward_currency > 0) {
        eLootSourceType lootSource = info->isMission ? LOOT_SOURCE_MISSION : LOOT_SOURCE_ACHIEVEMENT;
        character->SetCoins(character->GetCoins() + info->reward_currency, lootSource);
    }

    if (info->reward_maxinventory > 0) {
        auto* inventory = inventoryComponent->GetInventory(ITEMS);

        inventory->SetSize(inventory->GetSize() + info->reward_maxinventory);
    }

    if (info->reward_bankinventory > 0) {
        auto* inventory = inventoryComponent->GetInventory(VAULT_ITEMS);

        inventory->SetSize(inventory->GetSize() + info->reward_bankinventory);
    }

    if (info->reward_reputation > 0) {
        // TODO: In case of reputation, write code
    }

    if (info->reward_maxhealth > 0) {
        destroyableComponent->SetMaxHealth(destroyableComponent->GetMaxHealth() + static_cast<float>(info->reward_maxhealth));
    }

    if (info->reward_maximagination > 0) {
        destroyableComponent->SetMaxImagination(destroyableComponent->GetMaxImagination() + static_cast<float>(info->reward_maximagination));
    }

    EntityManager::Instance()->SerializeEntity(entity);

    if (info->reward_emote > 0) {
        character->UnlockEmote(info->reward_emote);
    }

    if (info->reward_emote2 > 0) {
        character->UnlockEmote(info->reward_emote2);
    }

    if (info->reward_emote3 > 0) {
        character->UnlockEmote(info->reward_emote3);
    }

    if (info->reward_emote4 > 0) {
        character->UnlockEmote(info->reward_emote4);
    }
}

void Mission::Progress(MissionTaskType type, int32_t value, LWOOBJID associate, const std::string& targets, int32_t count) {
    const auto isRemoval = count < 0;

    if (isRemoval && (IsComplete() || IsAchievement())) {
        return;
    }

    for (auto* task : m_Tasks) {
        if (task->IsComplete() && !isRemoval) {
            continue;
        }

        if (task->GetType() != type) {
            continue;
        }

        if (isRemoval && !task->InAllTargets(value)) {
            continue;
        }

        task->Progress(value, associate, targets, count);
    }
}

void Mission::SetMissionState(const MissionState state, const bool sendingRewards) {
    this->m_State = state;

    auto* entity = GetAssociate();

    if (entity == nullptr) {
        return;
    }

    GameMessages::SendNotifyMission(entity, entity->GetParentUser()->GetSystemAddress(), info->id, static_cast<int>(state), sendingRewards);
}

void Mission::SetMissionTypeState(MissionLockState state, const std::string& type, const std::string& subType) {
    // TODO
}

void Mission::SetCompletions(const uint32_t value) {
    m_Completions = value;
}

void Mission::SetReward(const LOT lot) {
    m_Reward = lot;
}

Mission::~Mission() {
    for (auto* task : m_Tasks) {
        delete task;
    }

    m_Tasks.clear();
}