<?php
require_once(__DIR__ . "/dbOperations.inc.php");

function addStartRecord($user_id, $params, $project_id = null, $start_device_id = null)
{
    $data = [
        "user_id" => $user_id,
        "start_time" => $params->get("start_time"),
        "project_id" => $project_id,
        "start_device_id" => $start_device_id
    ];

    $db = new DbOperations();
    $db->insert("time_records", $data);
    $db->execute();
}

function addProject($user_id, $params)
{
    $data = [
        "user_id" => $user_id,
        "name" => $params->get("name"),
        "start_date" => $params->get("start_date")
    ];

    $db = new DbOperations();
    $db->insert("projects", $data);
    $db->execute();
}

function addTimeRecord($user_id, $params, $project_id = null, $start_device_id = null)
{
    $data = [
        "user_id" => $user_id,
        "start_time" => $params->get("start_time"),
        "end_time" => $params->get("end_time"),
        "duration" => $params->get("duration"),
        "project_id" => $project_id,
        "start_device_id" => $start_device_id
    ];

    $db = new DbOperations();
    $db->insert("time_records", $data);
    $db->execute();
}

function getTimeRecord($user_id, $record_id)
{
    $db = new DbOperations();
    $db->select("time_records");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("record_id", Comparison::EQUAL, $record_id);
    $result = $db->execute();

    if (count($result) <= 0) {
        return null;
    }
    $result = $result[0];

    $result = getRecordExternalData($result);

    return $result;
}

function getProjects($user_id)
{
    $db = new DbOperations();
    $db->select("projects");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $results = $db->execute();

    foreach ($results as $key => $project) {
        $meta = getProjectRecordDerivedData($user_id, $project["project_id"]);

        foreach ($meta as $metaKey => $value) {
            $results[$key][$metaKey] = $value;
        }
    }

    return $results;
}

function getUser($user_id)
{
    $db = new DbOperations();
    $db->select("users", ["user_id", "name", "mail_address"]);
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $result = $db->execute();

    if (count($result) <= 0) {
        return null;
    }
    $result = $result[0];

    return $result;
}

function getProjectRecordDerivedData($user_id, $project_id)
{
    $durationAttribute = "SUM(duration) AS total_duration";
    $recordCountAttribute = "COUNT(*) AS record_count";

    $db = new DbOperations();
    $db->select("time_records", ["*", $durationAttribute, $recordCountAttribute], false);
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("project_id", Comparison::EQUAL, $project_id);
    $results = $db->execute();

    if (count($results) <= 0) {
        return ["duration" => 0, "record_count" => 0];
    } else {
        return [
            "duration" => (int)$results[0]["total_duration"],
            "record_count" => (int)$results[0]["record_count"]
        ];
    }
}

function getProjectRecord($user_id, $project_id, $finished = null)
{
    $db = new DbOperations();
    $db->select("time_records");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("project_id", Comparison::EQUAL, $project_id);

    if ($finished !== null) {
        if ($finished) {
            $db->addSql(" AND end_time IS NOT NULL");
        } else {
            $db->addSql(" AND end_time IS NULL");
        }
    }

    $db->orderBy("start_time", Order::DESC);
    $result = $db->execute();

    if (count($result) <= 0) {
        return null;
    }
    $result = $result[0];

    $result = getRecordExternalData($result);

    return $result;
}

function getRunningRecords($user_id)
{
    $db = new DbOperations();
    $db->select("time_records");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->addSql(" AND end_time IS NULL");
    $results = $db->execute();

    // Is still running?
    foreach ($results as $key => $record) {
        $results[$key] = getRecordExternalData($record);
    }

    return $results;
}

function getRecords($user_id, $limit = NULL, $finished = NULL, $visible = NULL)
{
    $db = new DbOperations();
    $db->select("time_records", ["record_id", "start_time", "end_time", "duration", "user_id", "project_id", "start_device_id"]);
    if ($visible != NULL) {
        $db->innerJoin("projects", "project_id");
    }
    $db->where("ju_time_records.user_id", Comparison::EQUAL, $user_id);
    if ($visible != NULL) {
        $db->where("ju_projects.visible", Comparison::EQUAL, $visible);
    }
    if ($finished != NULL) {
        if ($finished) {
            $db->addSql(" AND end_time IS NOT NULL");
        } else {
            $db->addSql(" AND end_time IS NULL");
        }
    }
    if ($limit != NULL) {
        $db->orderBy("record_id", Order::DESC);
        $db->limit($limit);
    }
    $results = $db->execute();

    // Is still running?
    foreach ($results as $key => $record) {
        $results[$key] = getRecordExternalData($record);
    }

    return $results;
}

function updateEndRecord($user_id, $params)
{
    $record_id = $params->get("record_id");

    // Get start instance to calculate duration
    $start_time = getTimeRecord($user_id, $record_id)["start_time"];

    $record = [
        "record_id" => $record_id,
        "end_time" => $params->get("end_time"),
        "duration" => calcDuration($start_time, $params->get("end_time"))
    ];

    updateRecord($user_id, $record);
}

function updateRecord($user_id, $record)
{
    $record_id = $record["record_id"];

    // Update given parameters
    $data = [];
    $props = ["end_time", "start_time", "duration", "project_id"];
    foreach ($props as $p) {
        if (array_key_exists ($p, $record)) {
            $data[$p] = $record[$p];
        }
    }

    $db = new DbOperations();
    $db->update("time_records", $data);
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("record_id", Comparison::EQUAL, $record_id);
    $db->execute();
}

function updateProject($user_id, $project)
{
    $project_id = $project["project_id"];

    // Update given parameters
    $data = [];
    $props = ["name", "start_date", "color", "visible"];
    foreach ($props as $p) {
        if (array_key_exists ($p, $project)) {
            $data[$p] = $project[$p];
        }
    }

    $db = new DbOperations();
    $db->update("projects", $data);
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("project_id", Comparison::EQUAL, $project_id);
    $db->execute();
}

function updateRecordTag($user_id, $tag)
{
    $record_tag_id = $tag["record_tag_id"];

    // Update given parameters
    $data = [];
    $props = ["name", "visible", "bundle"];
    foreach ($props as $p) {
        if (array_key_exists ($p, $tag)) {
            $data[$p] = $tag[$p];
        }
    }

    $db = new DbOperations();
    $db->update("record_tags", $data);
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("record_tag_id", Comparison::EQUAL, $record_tag_id);
    $db->execute();
}

function removeRecord($user_id, $params)
{
    $record_id = $params->get("record_id");

    $db = new DbOperations();
    $db->delete("time_records");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("record_id", Comparison::EQUAL, $record_id);
    $db->execute();
}

function removeProject($user_id, $params)
{
    $project_id = $params->get("project_id");

    $db = new DbOperations();
    $db->delete("projects");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("project_id", Comparison::EQUAL, $project_id);
    $db->execute();

    removeRecordsOfProject($user_id, $project_id);
}

function removeRecordsOfProject($user_id, $project_id)
{
    $db = new DbOperations();
    $db->delete("time_records");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("project_id", Comparison::EQUAL, $project_id);
    $db->execute();
}

function removeRecordTag($user_id, $params)
{
    $record_tag_id = $params->get("record_tag_id");

    $db = new DbOperations();
    $db->delete("record_tags");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("record_tag_id", Comparison::EQUAL, $record_tag_id);
    $db->execute();

    removeRecordTagFromAssociations($record_tag_id);
}

function removeRecordTagFromAssociations($record_tag_id)
{
    $db = new DbOperations();
    $db->delete("tags_on_records");
    $db->where("record_tag_id", Comparison::EQUAL, $record_tag_id);
    $db->execute();
}

function updateTimeRecord($user_id, $params)
{
    $data = [];

    $anythingUpdated = false;
    if ($params->exists(["start_time"])) {
        $data["start_time"] = $params->get("start_time");
        $anythingUpdated = true;
    }
    if ($params->exists(["end_time"])) {
        $data["end_time"] = $params->get("end_time");
        $anythingUpdated = true;
    }
    if ($params->exists(["duration"])) {
        $data["duration"] = $params->get("duration");
        $anythingUpdated = true;
    }
    if ($params->exists(["project_id"])) {
        $data["project_id"] = $params->get("project_id");
        $anythingUpdated = true;
    }
    if ($params->exists(["start_device_id"])) {
        $data["start_device_id"] = $params->get("start_device_id");
        $anythingUpdated = true;
    }

    if ($anythingUpdated == false) {
        return;
    }

    $db = new DbOperations();
    $db->update("time_records", $data);
    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->where("record_id", Comparison::EQUAL, $params->get("record_id"));
    $db->execute();
}

function getRecordExternalData($record)
{
    if ($record == null) {
        return null;
    }

    // Duration and running
    if ($record["end_time"] == NULL) {
        $record["duration"] = calcDuration($record["start_time"]);
        $record["running"] = true;
    } else {
        $record["running"] = false;
    }

    // Tags
    $tags = array();
    foreach (getTagsOnRecord($record["record_id"]) as $key => $tag) {
        $data = [
            "record_tag_id" => $tag["record_tag_id"],
            "name" => $tag["name"],
            "user_id" => $tag["user_id"],
            "visible" => $tag["visible"],
            "bundle" => $tag["bundle"]
        ];
        $tags[] = $data;
    }
    $record["tags"] = $tags;

    return $record;
}

function isProjectValid($project_id, $user_id)
{
    $db = new DbOperations();
    $db->select("projects");
    $db->where("project_id", Comparison::EQUAL, $project_id);
    $db->where("user_id", Comparison::EQUAL, $user_id);

    return count($db->execute()) == 1;
}

function isDeviceValid($start_device_id, $user_id)
{
    $db = new DbOperations();
    $db->select("devices");
    $db->where("start_device_id", Comparison::EQUAL, $start_device_id);
    $db->where("user_id", Comparison::EQUAL, $user_id);

    return count($db->execute()) == 1;
}

function calcDuration($start_time, $end_time = "NOW")
{
    return (int)(strtotime($end_time) - strtotime($start_time));
}

function getRecordTags($user_id)
{
    $db = new DbOperations();
    $db->select("record_tags");
    $db->where("user_id", Comparison::EQUAL, $user_id);
    return $db->execute();
}

function getTagsOnRecord($record_id)
{
    $db = new DbOperations();
    $db->select("tags_on_records");
    $db->innerJoin("record_tags", "record_tag_id");
    $db->where("record_id", Comparison::EQUAL, $record_id);
    return $db->execute();
}

function addRecordTag($user_id, $tag_name)
{
    $data = [
        "user_id" => $user_id,
        "name" => $tag_name
    ];

    $db = new DbOperations();
    $db->insert("record_tags", $data);
    $db->execute();
}

function addTagToRecord($tag_id, $record_id)
{
    $data = [
        "record_tag_id" => $tag_id,
        "record_id" => $record_id
    ];

    $db = new DbOperations();
    $db->insert("tags_on_records", $data);
    $db->execute();
}

function removeTagFromRecord($tag_id, $record_id)
{
    $db = new DbOperations();
    $db->delete("tags_on_records");
    $db->where("record_tag_id", Comparison::EQUAL, $tag_id);
    $db->where("record_id", Comparison::EQUAL, $record_id);
    $db->execute();
}

function getStats($user_id, $from_date, $until_date) {
    $sum_duration = "SUM(ju_time_records.duration) AS duration";
    $date = "DATE(ju_time_records.start_time) AS date";
    $record_count = "COUNT(*) AS record_count";

    $where1 = " AND DATE(ju_time_records.start_time) >= DATE( ";
    $where2 = " ) AND DATE(ju_time_records.start_time) <= DATE( ";
    $where3 = " ) AND ju_time_records.end_time IS NOT NULL ";

    $db = new DbOperations();
    $db->select("projects", ["name", "project_id", "color", "visible", $sum_duration, $date, $record_count], false);
    $db->innerJoin("time_records", "project_id");

    $db->where("user_id", Comparison::EQUAL, $user_id);
    $db->addSql($where1);
    $db->addValue($from_date);
    $db->addSql($where2);
    $db->addValue($until_date);
    $db->addSql($where3);

    $db->groupBy(["project_id", "date"]);
    return $db->execute();
}