<?php

class parserutils_set_metadata_during_rendering_test extends DokuWikiTest
{
    // the id used for this test case
    private $id;
    // if the test case is currently running
    private $active = false;
    // the original plugin controller
    private $plugin_controller;

    /**
     * the actual test
     *
     * @runInSeparateProcess
     * @preserveGlobalState disabled
     */
    public function test_p_set_metadata_during_rendering()
    {
        global $EVENT_HANDLER;
        $this->id = 'test:p_set_metadata_during_rendering';
        $this->active = true;

        // write the wiki page so it exists and needs to be rendered
        saveWikiText($this->id, 'Test ' . time(), 'Test data setup');

        $EVENT_HANDLER->register_hook(
            'PARSER_METADATA_RENDER',
            'BEFORE',
            $this,
            'helper_set_metadata',
            ['test_before_set' => 'test']
        );
        $EVENT_HANDLER->register_hook(
            'PARSER_METADATA_RENDER',
            'AFTER',
            $this,
            'helper_set_metadata',
            ['test_after_set' => 'test']
        );
        $EVENT_HANDLER->register_hook('PARSER_HANDLER_DONE', 'BEFORE', $this, 'helper_inject_test_instruction');

        // Change the global plugin controller so this test can be a fake syntax plugin
        global $plugin_controller;
        $this->plugin_controller = $plugin_controller;
        $plugin_controller = $this;

        // the actual rendering, all hooks should be executed here
        $newMeta = p_get_metadata($this->id);

        // restore the plugin controller
        $plugin_controller = $this->plugin_controller;

        // assert that all three calls to p_set_metadata have been successful
        $this->assertEquals($newMeta[ 'test_before_set' ], 'test');
        $this->assertEquals($newMeta[ 'test_after_set' ], 'test');
        $this->assertEquals($newMeta[ 'test_during_rendering' ], 'test');

        // clean up
        $this->active = false;

        // make sure the saved metadata is the one that has been rendered
        $this->assertEquals($newMeta, p_get_metadata($this->id));

        saveWikiText($this->id, '', 'Test data remove');
    }

    // helper for the action plugin part of the test, tries executing p_set_metadata during rendering
    public function helper_set_metadata($event, $meta)
    {
        if ($this->active) {
            p_set_metadata($this->id, $meta, false, true);
            $keys = array_keys($meta);
            $key = array_pop($keys);
            $this->assertTrue(is_string($meta[ $key ])); // ensure we really have a key
            // ensure that the metadata property hasn't been set previously
            $this->assertNotEquals($meta[ $key ], p_get_metadata($this->id, $key));
        }
    }

    // helper for injecting an instruction for this test case
    public function helper_inject_test_instruction($event)
    {
        if ($this->active) {
            $event->data->calls[] = ['plugin', ['parserutils_test', []], -9000];
        }
    }

    // fake syntax plugin rendering method that tries calling p_set_metadata during the actual rendering process
    public function render($format, &$renderer, $data)
    {
        if ($this->active) {
            $key = 'test_during_rendering';
            p_set_metadata($this->id, [$key => 'test'], false, true);
            // ensure that the metadata property hasn't been set previously
            $this->assertNotEquals($key, p_get_metadata($this->id, $key));
        }
    }

    // wrapper function for the fake plugin controller
    public function getList($type = '', $all = false)
    {
        return $this->plugin_controller->getList();
    }

    // wrapper function for the fake plugin controller, return $this for the fake syntax of this test
    public function load($type, $name, $new = false, $disabled = false)
    {
        if ($name == 'parserutils_test') {
            return $this;
        } else {
            return $this->plugin_controller->load($type, $name, $new, $disabled);
        }
    }
}

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