<?php
require_once('Slim/Slim.php');
\Slim\Slim::registerAutoloader();

$app=new \Slim\Slim();

$app->get('/entries/:account_id/:year/:month', 'get_entries');
$app->get('/accounts', 'get_accounts');
$app->get('/accounts/:account_id/months', 'get_months');
$app->delete('/entries/:id', 'remove_entry');
$app->post('/entries/add', 'add_entry');
$app->put('/entries/save/:id', 'save_entry');

$app->run();

function get_connection() {
    $db=new PDO("pgsql:host=localhost;dbname=accountant", "accountant", "accountant");
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    return $db;
}

// Return the entries
function get_entries($account_id, $year, $month) {

    $day=$year."-".$month."-01";

    $connection=get_connection();

    $sql = <<<EOF
select 
  id,
  value_date,
  operation_date,
  label,
  value,
  account_id,
  sold,
  pointedsold,
  category
from (
  select
    *, 
    sum(value) over(order by value_date, operation_date, label desc, value desc) as sold,
    sum(value) over(partition by operation_date is not null order by value_date, operation_date, label desc, value desc) as pointedSold
  from entry
  where account_id=:account_id
  order by value_date desc, operation_date desc, label, value) as e
where
  date_trunc('month', e.value_date) = :day
EOF;

    $statement=$connection->prepare($sql);
    $statement->bindParam("day", $day);
    $statement->bindParam("account_id", $account_id);

    $return=$statement->execute();

    echo(json_encode($statement->fetchAll(PDO::FETCH_ASSOC)));
}

// Add an entry
function add_entry() {
    $request = \Slim\Slim::getInstance()->request();
    $entry = json_decode($request->getBody(), true);

    $connection=get_connection();

    $statement=$connection->prepare("insert into entry (value_date, operation_date, label, value, account_id, category) values (:value_date, :operation_date, :label, :value, :account_id, :category)");

    $statement->bindParam("value_date", $entry['value_date']);
    $statement->bindParam("operation_date", array_key_exists("operation_date", $entry) ? $entry['operation_date'] : null);
    $statement->bindParam("label", $entry['label']);
    $statement->bindParam("value", $entry['value']);
    $statement->bindParam("account_id", $entry['account_id']);
    $statement->bindParam("category", array_key_exists("category", $entry) ? $entry["category"] : null);

    $return=$statement->execute();

    echo("Entry saved.");        
}

// Saves an entry
function save_entry($id) {
    $request = \Slim\Slim::getInstance()->request();
    $entry = json_decode($request->getBody(), true);

    $connection=get_connection();

    $statement=$connection->prepare("update entry set value_date=:value_date, operation_date=:operation_date, label=:label, value=:value, account_id=:account_id, category=:category where id=:id");

    $statement->bindParam("value_date", $entry['value_date']);
    $statement->bindParam("operation_date", array_key_exists("operation_date", $entry) ? $entry['operation_date'] : null);
    $statement->bindParam("label", $entry['label']);
    $statement->bindParam("value", $entry['value']);
    $statement->bindParam("account_id", $entry['account_id']);
    $statement->bindParam("id", $entry['id']);
    $statement->bindParam("category", array_key_exists("category", $entry) ? $entry["category"] : null);

    $return=$statement->execute();

    echo($entry['id'] . " saved.");        
}

// Remove an entry
function remove_entry($id) {
    $connection=get_connection();

    $statement=$connection->prepare("delete from entry where id=:id");
    $statement->bindParam("id", $id);

    $return=$statement->execute();

    echo("Entry #" . $id . " removed.");
}

// Return the accounts with their solds.
function get_accounts() {
    $connection=get_connection();

    $sql = <<<EOF
select
  account.id,
  account.name,
  sum(entry.value) as future,
  sum(case when entry.operation_date is not null then entry.value else cast(0 as numeric) end) as pointed,
  sum(case when entry.value_date <= now() then entry.value else cast(0 as numeric) end) as current
from
  account
  join entry on (account.id = entry.account_id)
group by
  account.id
order by
  account.name
EOF;

    $statement=$connection->prepare($sql);

    $return=$statement->execute();

    echo(json_encode($statement->fetchAll(PDO::FETCH_ASSOC)));
}

// Returns the months for an account.
function get_months($account_id) {
    $connection=get_connection();

    $sql = <<<EOF
select
  distinct extract(year from value_date) as year,
  extract(month from value_date) as month
from
  entry
where
  account_id = :account_id
order by
  year,
  month
EOF;

    $statement=$connection->prepare($sql);
    $statement->bindParam("account_id", $account_id);

    $return=$statement->execute();

    echo(json_encode($statement->fetchAll(PDO::FETCH_ASSOC)));
}
?>