<?php
namespace nulib\cache;

use nulib\cl;
use nulib\output\msg;

class cacheTest extends _TestCase {
  const DATA = [
    "fr" => ["a" => "un", "b" => "deux"],
    "eng" => ["a" => "one", "b" => "two"],
    ["a" => 1, "b" => 2],
  ];

  function _testRows(iterable $rows, int $expectedCount) {
    $count = 0;
    foreach ($rows as $key => $row) {
      $parts = ["got $key => {"];
      $i = 0;
      foreach ($row as $k => $v) {
        if ($i++ > 0) $parts[] = ", ";
        $parts[] = "$k=$v";
      }
      $parts[] = "}";
      msg::info(implode("", $parts));
      $count++;
    }
    self::assertSame($expectedCount, $count);
  }
  
  function _testGet(string $dataId, int $expectedCount, callable $gencompute) {
    msg::section($dataId);
    cache::nc(true, true);

    msg::step("premier");
    $rows = cache::get($dataId, $gencompute());
    $this->_testRows($rows, $expectedCount);
    msg::step("deuxième");
    $rows = cache::get($dataId, $gencompute());
    $this->_testRows($rows, $expectedCount);

    msg::step("vider le cache");
    cache::nc(true, true);

    msg::step("premier");
    $rows = cache::get($dataId, $gencompute());
    $this->_testRows($rows, $expectedCount);
    msg::step("deuxième");
    $rows = cache::get($dataId, $gencompute());
    $this->_testRows($rows, $expectedCount);
  }

  function testGetStatic() {
    $this->_testGet("getStatic", 3, function () {
      return static function () {
        msg::note("getdata");
        return self::DATA;
      };
    });
  }

  function testGetGenerator() {
    $this->_testGet("getGenerator", 3, function () {
      return static function () {
        msg::note("gendata");
        foreach (self::DATA as $key => $item) {
          msg::info("yield $key");
          yield $key => $item;
          sleep(2);
        }
        msg::note("fin gendata");
      };
    });
  }

  function _testAll(string $cursorId, int $expectedCount, callable $gencompute) {
    msg::section($cursorId);
    cache::nc(true, true);

    msg::step("premier");
    $rows = cache::all($cursorId, $gencompute());
    $this->_testRows($rows, $expectedCount);
    msg::step("deuxième");
    $rows = cache::all($cursorId, $gencompute());
    $this->_testRows($rows, $expectedCount);

    msg::step("vider le cache");
    cache::nc(true, true);

    msg::step("premier");
    $rows = cache::all($cursorId, $gencompute());
    $this->_testRows($rows, $expectedCount);
    msg::step("deuxième");
    $rows = cache::all($cursorId, $gencompute());
    $this->_testRows($rows, $expectedCount);
  }

  function testAllGenerator() {
    $this->_testAll("allGenerator", 4, function() {
      return static function() {
        $db = new SourceDb();
        msg::note("query source");
        yield from $db->all("select * from source");
      };
    });
  }
}