#include "View.h"

#include <algorithm>
#include <functional>
#include <iomanip>
#include <sstream>

#include <raylib.h>

#include "Globals.h"
#include "Grid.h"
#include "Label.h"
#include "Timeline.h"
#include "VectorMath.h"


const Color BACKGROUND {8, 8, 50, 255};
const Color LINE {240, 240, 240, 160};


View::View(std::vector<Grid> grids, Timeline timeline) :
    m_cameraman {},
    m_grids {grids},
    m_labels {},
    m_grid {0},
    m_active {nullptr},
    m_timeline {timeline}
{
}


View::~View()
{
}


void
View::update(const float dt)
{
    if (IsKeyPressed(KEY_SPACE)) {
        m_grid++;
        if (m_grid >= m_grids.size())
            m_grid = 0;
    }
    m_cameraman.update(dt);
    m_timeline.move(dt * 60);
    const int height = GetScreenHeight();
    const int width = GetScreenWidth();
    const auto& wrecks = m_grids.at(m_grid).wrecks;
    m_labels.clear();
    m_labels.reserve(wrecks.size());
    const auto mouse = GetMousePosition();
    for (const auto& wreck : wrecks) {
        const auto pos = GetWorldToScreen(wreck.position, m_cameraman.camera);
        const auto base = GetWorldToScreen({wreck.position.x, 0.0f, wreck.position.z}, m_cameraman.camera);
        if (0 > pos.x || width < pos.x || 0 > pos.y || height < pos.y)
            if (0 > base.x || width < base.x || 0 > base.y || height < base.y)
                continue;
        const auto depth = dist(m_cameraman.camera.position, wreck.position);
        const auto length = dist(pos, base);
        const bool hover = 8.0f > dist(mouse, pos);
        m_labels.push_back(
            Label{pos, base, depth, length, hover, std::ref(wreck), app.icons.find(wreck.killmail.group)});
    }
    std::sort(m_labels.begin(), m_labels.end(), [](auto& a, auto& b){ return a.depth > b.depth; });
    m_active = nullptr;
    std::for_each(m_labels.rbegin(), m_labels.rend(), [this](auto& label) {
        if (label.hover) {
            if (m_active)
                label.hover = false;
            else
                m_active = &label;
        }
    });
}


void
View::draw() const
{
    BeginDrawing();
    ClearBackground(BACKGROUND);
    BeginMode3D(m_cameraman.camera);
    DrawGrid(12, 1.0f);
    EndMode3D();
    for (const auto& point : m_labels) {
        Color line = point.hover ? ORANGE : LINE;
        Color icon = point.hover ? ORANGE : WHITE;
        Color white = WHITE;
        if (!point.hover && point.wreck.get().time > m_timeline.current()) {
            line.a = 20;
            icon.a = 20;
            white.a = 20;
        }
        if (point.length > 8)
            DrawLine(point.base.x, point.base.y, point.pos.x, point.pos.y, line);
        DrawTexture(point.texture, point.pos.x - 8, point.pos.y - 8, icon);
        int team = point.wreck.get().team;
        if (team != -1)
            DrawTexture(app.icons.team_icon(team), point.pos.x + 3, point.pos.y + 3, white);
    }
    DrawFPS(5, 5);
    DrawText(TextFormat("%d", m_labels.size()), 5, 25, 20, DARKGRAY);
    DrawRectangle(2, GetScreenHeight() - 10, (GetScreenWidth() - 4) * m_timeline.progress(), 8, RED);
    EndDrawing();
}