#include "../include/MessageComposer.hpp"
#include "../include/DynamicImage.hpp"
#include <stdio.h>
#include <vector>
#include <string.h>
#include <gtkmm/application.h>
#include <gtkmm/window.h>
#include <gtkmm/grid.h>
#include <gtkmm/textview.h>
#include <assert.h>

#define REQUIRE(expr) do { if(!(expr)) { fprintf(stderr, "%s:%d: Assert failed: %s\n", __FILE__, __LINE__, #expr); exit(EXIT_FAILURE); } } while(0)
static void requireEqualValues(int a, int b, const char *file, int line)
{
    if(a != b)
    {
        fprintf(stderr, "%s:%d: Assert failed: %d == %d\n", file, line, a, b);
        exit(EXIT_FAILURE);
    }
}
#define REQUIRE_EQUAL(a, b) do { requireEqualValues((a), (b), __FILE__, __LINE__); } while(0)

static void applyRichText(Gtk::TextView *textView, const Glib::ustring &text)
{
    auto buffer = textView->get_buffer();
    buffer->set_text("");
    Gtk::TextIter iter = buffer->get_iter_at_offset(0);

    dchat::compose(text, [textView, &text, &iter, &buffer](dchat::MessagePart messagePart)
    {
        switch(messagePart.type)
        {
            case dchat::MessagePart::Type::TEXT:
            {
                iter = buffer->insert(iter, text.data() + messagePart.textRange.start, text.data() + messagePart.textRange.end);
                break;
            }
            case dchat::MessagePart::Type::EMOJI:
            {
                auto anchor = Gtk::TextChildAnchor::create();
                iter = buffer->insert_child_anchor(iter, anchor);
                auto image = Gtk::manage(new dchat::DynamicImage());
                image->url = text.substr(messagePart.textRange.start, messagePart.textRange.length());
                image->set_size_request(35, 35);
                textView->add_child_at_anchor(*image, anchor);
                break;
            }
            default:
                assert(false);
                break;
        }
    });
}

static int testVisual(int argc, char **argv)
{
    auto app = Gtk::Application::create(argc, argv, "dec05eba.dchat", Gio::APPLICATION_NON_UNIQUE);
    Gtk::Window window;
    window.set_border_width(0);
    window.set_size_request(640, 480);

    auto grid = Gtk::manage(new Gtk::Grid());
    grid->set_vexpand(true);
    grid->set_hexpand(true);
    window.add(*grid);

    auto textView = Gtk::manage(new Gtk::TextView());
    textView->set_size_request(640, 480);
    textView->set_wrap_mode(Gtk::WRAP_WORD_CHAR);
    applyRichText(textView, "Hello world [emoji](https://discordemoji.com/assets/emoji/PeepoHide.png)[emoji](https://discordemoji.com/assets/emoji/PeepoHide.png)");
    grid->attach(*textView, 0, 0, 1, 1);

    window.show_all();
    return app->run(window);
}

int main(int argc, char **argv)
{
    std::vector<dchat::MessagePart> expect = 
    {
        dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 0, 4 } },
        dchat::MessagePart { dchat::MessagePart::Type::EMOJI, dchat::Range{ 12, 16 } },
        dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 17, 21 } }
    };

    std::vector<const char*> expectText = 
    {
        "abc ",
        "cool",
        " def"
    };

    int index = 0;
    const char *str = "abc [emoji](cool) def";

    auto compareFunc = [&str, &index, &expect, &expectText](dchat::MessagePart messagePart)
    {
        REQUIRE(index < expect.size());
        REQUIRE_EQUAL((int)messagePart.type, (int)expect[index].type);
        REQUIRE_EQUAL(messagePart.textRange.start, expect[index].textRange.start);
        REQUIRE_EQUAL(messagePart.textRange.end, expect[index].textRange.end);
        int length = messagePart.textRange.end - messagePart.textRange.start;
        if(strncmp(str + messagePart.textRange.start, expectText[index], length) != 0)
        {
            fprintf(stderr, "Assert failed: |%.*s| == |%.*s|\n", length, str + messagePart.textRange.start, length, expectText[index]);
            exit(EXIT_FAILURE);
        }
        ++index;
    };

    dchat::compose(str, compareFunc);

    {
        expect = 
        {
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 0, 4 } },
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 4, 20 } }
        };

        expectText = 
        {
            "abc ",
            "[emoji](cool def"
        };

        index = 0;
        str = "abc [emoji](cool def";
        dchat::compose(str, compareFunc);
    }

    {
        expect = 
        {
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 0, 4 } },
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 4, 11 } },
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 11, 22 } }
        };

        expectText = 
        {
            "abc ",
            "[emoji]",
            " (cool def)"
        };

        index = 0;
        str = "abc [emoji] (cool def)";
        dchat::compose(str, compareFunc);
    }

    {
        expect = 
        {
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 0, 4 } },
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 4, 20 } },
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 20, 24 } }
        };

        expectText = 
        {
            "abc ",
            "[notemoji](cool)",
            " def"
        };

        index = 0;
        str = "abc [notemoji](cool) def";
        dchat::compose(str, compareFunc);
    }

    {
        expect = 
        {
            dchat::MessagePart { dchat::MessagePart::Type::TEXT, dchat::Range{ 0, 12 } },
            dchat::MessagePart { dchat::MessagePart::Type::EMOJI, dchat::Range{ 20, 71 } }
        };

        expectText = 
        {
            "Hello world ",
            "https://discordemoji.com/assets/emoji/PeepoHide.png"
        };

        index = 0;
        str = "Hello world [emoji](https://discordemoji.com/assets/emoji/PeepoHide.png)";
        dchat::compose(str, compareFunc);
    }

    return testVisual(argc, argv);
}