#include "catch.hpp"
#include "fake_path.hpp"

// mapnik
#include <mapnik/extend_converter.hpp>

// stl
#include <iostream>

namespace offset_test {

TEST_CASE("extend converter") {

SECTION("empty") {
    try
    {
        fake_path path = {};
        mapnik::extend_converter<fake_path> c(path, 1000);
        double x, y;
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_END);
    }
    catch (std::exception const& ex)
    {
        std::cerr << ex.what() << "\n";
        REQUIRE(false);
    }
}

SECTION("one point") {
    try
    {
        fake_path path = { 0, 0 };
        mapnik::extend_converter<fake_path> c(path, 1000);
        double x, y;
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_MOVETO);
        REQUIRE(x == 0);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_END);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_END);
    }
    catch (std::exception const& ex)
    {
        std::cerr << ex.what() << "\n";
        REQUIRE(false);
    }
}

SECTION("two points") {
    try
    {
        fake_path path = { 0, 0 , 1, 0};
        mapnik::extend_converter<fake_path> c(path, 1000);
        double x, y;
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_MOVETO);
        REQUIRE(x == -1000);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 1001);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_END);
    }
    catch (std::exception const& ex)
    {
        std::cerr << ex.what() << "\n";
        REQUIRE(false);
    }
}

SECTION("three points") {
    try
    {
        fake_path path = { 0, 0, 1, 0, 2, 0 };
        mapnik::extend_converter<fake_path> c(path, 1000);
        double x, y;
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_MOVETO);
        REQUIRE(x == -1000);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 1);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 1002);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_END);
    }
    catch (std::exception const& ex)
    {
        std::cerr << ex.what() << "\n";
        REQUIRE(false);
    }
}

SECTION("more points") {
    try
    {
        fake_path path = { 0, 0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0 };
        mapnik::extend_converter<fake_path> c(path, 1000);
        double x, y;
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_MOVETO);
        REQUIRE(x == -1000);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 1);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 2);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 3);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 4);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_LINETO);
        REQUIRE(x == 1005);
        REQUIRE(y == 0);
        REQUIRE(c.vertex(&x, &y) == mapnik::SEG_END);
    }
    catch (std::exception const& ex)
    {
        std::cerr << ex.what() << "\n";
        REQUIRE(false);
    }
}

}

}