#include "Database.h"
#include "BoostLog.h"
#include <sqlite3.h>
#include <sstream>

bool Database::open(const std::string &path) {
    bool ret = true;
    int result = sqlite3_open(path.c_str(), &m_sqlite3);
    if (result != SQLITE_OK) {
        ret = false;
        LOG(error) << "open database failed.";
    }
    initialize();
    return ret;
}

static int selectTaskCallback(void *data, int argc, char **argv, char **columnName) {
    auto tasks = reinterpret_cast<Tasks *>(data);
    Task task;
    for (int i = 0; i < argc; i++) {
        if (argv[i] == nullptr) continue;
        if (strcmp(columnName[i], "id") == 0) {
            task.id = std::atol(argv[i]);
        } else if (strcmp(columnName[i], "create_time") == 0) {
            task.createTime = std::atol(argv[i]);
        } else if (strcmp(columnName[i], "content") == 0) {
            task.content = argv[i];
        } else if (strcmp(columnName[i], "comment") == 0) {
            task.comment = argv[i];
        } else if (strcmp(columnName[i], "finished") == 0) {
            task.finished = std::atol(argv[i]);
        } else if (strcmp(columnName[i], "parent_id") == 0) {
            task.parentId = std::atol(argv[i]);
        }
    }
    tasks->push_back(task);
    return 0;
}

Tasks Database::tasks() {
    Tasks ret;
    char *error = nullptr;
    if (sqlite3_exec(m_sqlite3, "select * from tasks", selectTaskCallback, &ret, &error) != SQLITE_OK) {
        LOG(error) << "sqlite3_exec() failed: " << error << std::endl;
        sqlite3_free(error);
    }
    std::unordered_map<int, Task *> tasks;
    for (auto iterator = ret.begin(); iterator != ret.end();) {
        if (iterator->parentId >= 0) {
            if (tasks.count(iterator->parentId) > 0) {
                auto parentTask = tasks.at(iterator->parentId);
                parentTask->children.push_back(*iterator);
                tasks.insert({iterator->id, &parentTask->children.back()});
            } else {
                LOG(warning) << "task`s parent id " << iterator->parentId << " not existed.";
            }
            iterator = ret.erase(iterator);
        } else {
            tasks.insert({iterator->id, &(*iterator)});
            ++iterator;
        }
    }
    return ret;
}

bool Database::addTask(uint64_t createTime, const std::string &content, const std::string &comment, int parentId,
                       bool finished) {
    bool ret = true;
    std::ostringstream oss;
    oss << "INSERT INTO tasks (create_time,content,comment,parent_id,finished) VALUES (" << createTime << ",\""
        << content << "\",\"" << comment << "\"," << parentId << "," << finished << ");";
    auto sql = oss.str();
    char *error = nullptr;
    int result = sqlite3_exec(m_sqlite3, sql.c_str(), NULL, NULL, &error);
    if (result != SQLITE_OK) {
        LOG(error) << "add task failed: " << error << ", sql: " << sql;
        sqlite3_free(error);
        ret = false;
    }
    return ret;
}

bool Database::removeTask(int id) {
    bool ret = true;
    std::ostringstream oss;
    oss << "DELETE FROM tasks WHERE id = " << id << ";";
    auto sql = oss.str();
    char *error = nullptr;
    int result = sqlite3_exec(m_sqlite3, sql.c_str(), NULL, NULL, &error);
    if (result != SQLITE_OK) {
        LOG(error) << "add task failed: " << error << ", sql: " << sql;
        sqlite3_free(error);
        ret = false;
    }
    return ret;
}

void Database::setTaskFinished(int id, bool finished, uint64_t finishedTime) {
    std::ostringstream oss;
    oss << "UPDATE tasks SET finished = " << finished << ", finished_time = " << finishedTime << " WHERE id = " << id;
    auto sql = oss.str();
    int result = sqlite3_exec(m_sqlite3, sql.c_str(), NULL, NULL, NULL);
    if (result != SQLITE_OK) {
        LOG(error) << "add task failed: " << sqlite3_errmsg(m_sqlite3) << ", sql: " << sql;
        return;
    }
}

void Database::updateTodayVisitCount(const std::string &url, const std::string &visitorUuid) {
    sqlite3_stmt *stmt = nullptr;
    const char *sql_select = "SELECT page_view_count FROM today_visit_count WHERE url = ? AND visitor_uuid = ?";
    if (sqlite3_prepare_v2(m_sqlite3, sql_select, -1, &stmt, 0) != SQLITE_OK) {
        LOG(error) << "Failed to prepare statement: " << sqlite3_errmsg(m_sqlite3);
        return;
    }
    sqlite3_bind_text(stmt, 1, url.c_str(), -1, SQLITE_STATIC);
    sqlite3_bind_text(stmt, 2, visitorUuid.c_str(), -1, SQLITE_STATIC);
    int rc = sqlite3_step(stmt);
    if (rc == SQLITE_ROW) {     // 记录存在，执行UPDATE语句
        sqlite3_finalize(stmt); // 释放SELECT语句的资源
        const char *sql_update =
            "UPDATE today_visit_count SET page_view_count = page_view_count + 1 WHERE url = ? AND visitor_uuid = ?";
        if (sqlite3_prepare_v2(m_sqlite3, sql_update, -1, &stmt, 0) != SQLITE_OK) {
            LOG(error) << "Failed to prepare statement: " << sqlite3_errmsg(m_sqlite3);
            return;
        }
        sqlite3_bind_text(stmt, 1, url.c_str(), -1, SQLITE_STATIC);
        sqlite3_bind_text(stmt, 2, visitorUuid.c_str(), -1, SQLITE_STATIC);
        if (sqlite3_step(stmt) != SQLITE_DONE) {
            LOG(error) << "Failed to execute statement: " << sqlite3_errmsg(m_sqlite3);
            sqlite3_finalize(stmt);
            return;
        }
    } else {                    // 记录不存在，执行INSERT语句
        sqlite3_finalize(stmt); // 释放SELECT语句的资源
        const char *sql_insert = "INSERT INTO today_visit_count (url, visitor_uuid, page_view_count) VALUES (?, ?, 1)";
        if (sqlite3_prepare_v2(m_sqlite3, sql_insert, -1, &stmt, 0) != SQLITE_OK) {
            LOG(error) << "Failed to prepare statement: " << sqlite3_errmsg(m_sqlite3);
            return;
        }
        sqlite3_bind_text(stmt, 1, url.c_str(), -1, SQLITE_STATIC);
        sqlite3_bind_text(stmt, 2, visitorUuid.c_str(), -1, SQLITE_STATIC);
        if (sqlite3_step(stmt) != SQLITE_DONE) { // 执行INSERT语句
            LOG(error) << "Failed to execute statement: " << sqlite3_errmsg(m_sqlite3);
            sqlite3_finalize(stmt);
            return;
        }
    }
    // 释放语句资源
    sqlite3_finalize(stmt);
}

void Database::clearTodayVisitRecord() {
    char *message = nullptr;
    constexpr auto sql = "DELETE FROM today_visit_count";
    int rc = sqlite3_exec(m_sqlite3, sql, nullptr, nullptr, &message);
    if (rc != SQLITE_OK) {
        LOG(error) << "SQL error: " << message;
        sqlite3_free(message);
    }
}

static bool urlExists(sqlite3 *db, const std::string &url) {
    std::string sql = "SELECT 1 FROM visit_count WHERE url = '" + url + "'";
    sqlite3_stmt *stmt;
    int rc = sqlite3_prepare_v2(db, sql.c_str(), -1, &stmt, nullptr);
    if (rc != SQLITE_OK) {
        LOG(error) << "Failed to prepare statement: " << sqlite3_errmsg(db);
        return false;
    }
    rc = sqlite3_step(stmt);
    bool exists = (rc == SQLITE_ROW);
    sqlite3_finalize(stmt);
    return exists;
}

void Database::updateVisitCount() {
    constexpr auto sql = "SELECT url, COUNT(DISTINCT visitor_uuid) AS unique_visitors, SUM(page_view_count) AS "
                         "total_page_views FROM today_visit_count GROUP BY url";
    sqlite3_stmt *stmt;

    int rc = sqlite3_prepare_v2(m_sqlite3, sql, -1, &stmt, nullptr);
    if (rc != SQLITE_OK) {
        LOG(error) << "Failed to prepare statement: " << sqlite3_errmsg(m_sqlite3);
        return;
    }

    std::unordered_map<std::string, std::pair<int, int>> urlData;
    while ((rc = sqlite3_step(stmt)) == SQLITE_ROW) {
        std::string url = reinterpret_cast<const char *>(sqlite3_column_text(stmt, 0));
        int uniqueVisitors = sqlite3_column_int(stmt, 1);
        int totalPageViews = sqlite3_column_int(stmt, 2);
        urlData[url] = {uniqueVisitors, totalPageViews};
    }

    sqlite3_finalize(stmt);
    for (const auto &[url, data] : urlData) {
        int uniqueVisitors = data.first;
        int totalPageViews = data.second;
        std::string updateSql;
        if (urlExists(m_sqlite3, url)) {
            updateSql = "UPDATE visit_count SET unique_visitor_count = unique_visitor_count + " +
                        std::to_string(uniqueVisitors) + ", page_view_count = page_view_count + " +
                        std::to_string(totalPageViews) + " WHERE url = '" + url + "'";
        } else {
            updateSql = "INSERT INTO visit_count (url, unique_visitor_count, page_view_count) VALUES ('" + url + "', " +
                        std::to_string(uniqueVisitors) + ", " + std::to_string(totalPageViews) + ")";
        }
        char *message = nullptr;
        LOG(info) << updateSql;
        rc = sqlite3_exec(m_sqlite3, updateSql.c_str(), nullptr, nullptr, &message);
        if (rc != SQLITE_OK) {
            LOG(error) << "SQL error: " << message;
            sqlite3_free(message);
        }
    }
}

bool Database::addHomeBoxItem(const std::string &name, const std::string &location, int cost) {
    bool ret = true;
    std::ostringstream oss;
    oss << "INSERT INTO homebox (name,location,cost) VALUES (\"" << name << "\",\"" << location << "\"," << cost
        << ");";
    auto sql = oss.str();
    char *error = nullptr;
    int result = sqlite3_exec(m_sqlite3, sql.c_str(), NULL, NULL, &error);
    if (result != SQLITE_OK) {
        LOG(error) << "add task failed: " << error << ", sql: " << sql;
        sqlite3_free(error);
        ret = false;
    }
    return ret;
}

static int selectHomeBoxItemCallback(void *data, int argc, char **argv, char **columnName) {
    auto items = reinterpret_cast<HomeBox::Items *>(data);
    HomeBox::Item item;
    for (int i = 0; i < argc; i++) {
        if (argv[i] == nullptr) continue;
        if (strcmp(columnName[i], "id") == 0) {
            item.id = std::atol(argv[i]);
        } else if (strcmp(columnName[i], "name") == 0) {
            item.name = argv[i];
        } else if (strcmp(columnName[i], "location") == 0) {
            item.location = argv[i];
        } else if (strcmp(columnName[i], "cost") == 0) {
            item.cost = std::atol(argv[i]);
        }
    }
    items->push_back(item);
    return 0;
}

HomeBox::Items Database::homeBoxItems() {
    HomeBox::Items ret;
    char *error = nullptr;
    if (sqlite3_exec(m_sqlite3, "select * from homebox", selectHomeBoxItemCallback, &ret, &error) != SQLITE_OK) {
        LOG(error) << "sqlite3_exec() failed: " << error << std::endl;
        sqlite3_free(error);
    }
    return ret;
}

void Database::initialize() {
    const char *sql =
        "CREATE TABLE IF NOT EXISTS tasks (id INTEGER PRIMARY KEY AUTOINCREMENT, create_time INTEGER NOT NULL, "
        "parent_id INTEGER, content VARCHAR(512) NOT NULL, comment VARCHAR(512) NOT NULL, finished BOLL, finished_time "
        "INTEGER);";
    int result = sqlite3_exec(m_sqlite3, sql, NULL, NULL, NULL);
    if (result != SQLITE_OK) {
        LOG(error) << "Failed to create table: " << sqlite3_errmsg(m_sqlite3);
        return;
    }

    const char *homeBoxSql = "CREATE TABLE IF NOT EXISTS homebox (id INTEGER PRIMARY KEY AUTOINCREMENT, "
                             "name VARCHAR(512) NOT NULL, location VARCHAR(512) NOT NULL, cost INTEGER);";
    result = sqlite3_exec(m_sqlite3, homeBoxSql, NULL, NULL, NULL);
    if (result != SQLITE_OK) {
        LOG(error) << "Failed to create table: " << sqlite3_errmsg(m_sqlite3);
        return;
    }

    const char *sql_create_visit_count = R"(
        CREATE TABLE IF NOT EXISTS visit_count (
            id INTEGER NOT NULL PRIMARY KEY,
            url TEXT NOT NULL,
            page_view_count INTEGER NOT NULL,
            unique_visitor_count INTEGER NOT NULL
        );
    )";

    char *message = nullptr;
    result = sqlite3_exec(m_sqlite3, sql_create_visit_count, 0, 0, &message);
    if (result != SQLITE_OK) {
        LOG(error) << "Failed to create table: " << message << std::endl;
        sqlite3_free(message);
    }

    const char *sql_create_today_visit_count = R"(
        CREATE TABLE IF NOT EXISTS today_visit_count (
            id INTEGER NOT NULL,
            url TEXT NOT NULL,
            visitor_uuid TEXT NOT NULL,
            page_view_count INTEGER NOT NULL,
            PRIMARY KEY (id)
        );
    )";
    result = sqlite3_exec(m_sqlite3, sql_create_today_visit_count, 0, 0, &message);
    if (result != SQLITE_OK) {
        LOG(error) << "Failed to create table: " << message << std::endl;
        sqlite3_free(message);
    }
}

Database::~Database() {
    if (m_sqlite3 != nullptr) {
        sqlite3_close(m_sqlite3);
        m_sqlite3 = nullptr;
    }
}