#include "platform_api/platform_services.h"
#include "test_harness.h"

#include <string>
#include <string_view>
#include <utility>

namespace {

class FakePlatformServices final : public pp::platform::PlatformServices {
public:
    explicit FakePlatformServices(std::string clipboard_value)
        : clipboard_value_(std::move(clipboard_value))
    {
    }

    [[nodiscard]] std::string clipboard_text() override
    {
        ++clipboard_reads;
        return clipboard_value_;
    }

    [[nodiscard]] bool set_clipboard_text(std::string_view text) override
    {
        ++clipboard_writes;
        clipboard_value_.assign(text);
        return true;
    }

    void set_cursor_visible(bool visible) override
    {
        ++cursor_updates;
        cursor_visible = visible;
    }

    void set_virtual_keyboard_visible(bool visible) override
    {
        ++keyboard_updates;
        keyboard_visible = visible;
    }

    int clipboard_reads = 0;
    int clipboard_writes = 0;
    int cursor_updates = 0;
    int keyboard_updates = 0;
    bool cursor_visible = false;
    bool keyboard_visible = false;

private:
    std::string clipboard_value_;
};

void platform_services_dispatch_clipboard_reads_and_writes(pp::tests::Harness& harness)
{
    FakePlatformServices fake("#112233");
    pp::platform::PlatformServices& services = fake;

    PP_EXPECT(harness, services.clipboard_text() == "#112233");
    PP_EXPECT(harness, services.set_clipboard_text("#ff00aa"));
    PP_EXPECT(harness, services.clipboard_text() == "#ff00aa");
    PP_EXPECT(harness, fake.clipboard_reads == 2);
    PP_EXPECT(harness, fake.clipboard_writes == 1);
}

void platform_services_preserve_empty_clipboard_writes(pp::tests::Harness& harness)
{
    FakePlatformServices fake("initial");
    pp::platform::PlatformServices& services = fake;

    PP_EXPECT(harness, services.set_clipboard_text(""));
    PP_EXPECT(harness, services.clipboard_text().empty());
    PP_EXPECT(harness, fake.clipboard_writes == 1);
}

void platform_services_dispatch_visibility_updates(pp::tests::Harness& harness)
{
    FakePlatformServices fake("unused");
    pp::platform::PlatformServices& services = fake;

    services.set_cursor_visible(true);
    services.set_virtual_keyboard_visible(true);
    services.set_cursor_visible(false);
    services.set_virtual_keyboard_visible(false);

    PP_EXPECT(harness, fake.cursor_updates == 2);
    PP_EXPECT(harness, fake.keyboard_updates == 2);
    PP_EXPECT(harness, !fake.cursor_visible);
    PP_EXPECT(harness, !fake.keyboard_visible);
}

}

int main()
{
    pp::tests::Harness harness;
    harness.run("platform services dispatch clipboard reads and writes", platform_services_dispatch_clipboard_reads_and_writes);
    harness.run("platform services preserve empty clipboard writes", platform_services_preserve_empty_clipboard_writes);
    harness.run("platform services dispatch visibility updates", platform_services_dispatch_visibility_updates);
    return harness.finish();
}