/*****************************************************************************
 * Copyright (c) 2014-2020 OpenRCT2 developers
 *
 * For a complete list of all authors, please refer to contributors.md
 * Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
 *
 * OpenRCT2 is licensed under the GNU General Public License version 3.
 *****************************************************************************/

#include "../../common.h"
#include "../../config/Config.h"
#include "../../interface/Viewport.h"
#include "../../paint/Paint.h"
#include "../../paint/Supports.h"
#include "../Track.h"
#include "../TrackPaint.h"
#include "../Vehicle.h"
#include "../VehiclePaint.h"

enum
{
    SPR_LAUNCHED_FREEFALL_TOWER_BASE = 14564,
    SPR_LAUNCHED_FREEFALL_TOWER_SEGMENT = 14565,
    SPR_LAUNCHED_FREEFALL_TOWER_SEGMENT_TOP = 14566,
};

/**
 *
 *  rct2: 0x006D5FAB
 */
void vehicle_visual_launched_freefall(
    paint_session* session, int32_t x, int32_t imageDirection, int32_t y, int32_t z, const Vehicle* vehicle,
    const rct_ride_entry_vehicle* vehicleEntry)
{
    auto imageFlags = SPRITE_ID_PALETTE_COLOUR_2(vehicle->colours.body_colour, vehicle->colours.trim_colour);
    if (vehicle->IsGhost())
    {
        imageFlags = CONSTRUCTION_MARKER;
    }

    // Draw back:
    int32_t baseImage_id = vehicleEntry->base_image_id + ((vehicle->restraints_position / 64) * 2);
    auto image_id = (baseImage_id + 2) | imageFlags;
    PaintAddImageAsParent(session, image_id, { 0, 0, z }, { 2, 2, 41 }, { -11, -11, z + 1 });

    // Draw front:
    image_id = (baseImage_id + 1) | imageFlags;
    PaintAddImageAsParent(session, image_id, { 0, 0, z }, { 16, 16, 41 }, { -5, -5, z + 1 });

    // Draw peeps:
    if (session->DPI.zoom_level < 2 && vehicle->num_peeps > 0 && !vehicle->IsGhost())
    {
        baseImage_id = vehicleEntry->base_image_id + 9;
        if ((vehicle->restraints_position / 64) == 3)
        {
            baseImage_id += 2; // Draw peeps sitting without transparent area between them for restraints
        }
        auto directionOffset = imageDirection / 8;
        image_id = (baseImage_id + (((directionOffset + 0) & 3) * 3))
            | SPRITE_ID_PALETTE_COLOUR_2(vehicle->peep_tshirt_colours[0], vehicle->peep_tshirt_colours[1]);
        PaintAddImageAsChild(session, image_id, 0, 0, 16, 16, 41, z, -5, -5, z + 1);
        if (vehicle->num_peeps > 2)
        {
            image_id = (baseImage_id + (((directionOffset + 1) & 3) * 3))
                | SPRITE_ID_PALETTE_COLOUR_2(vehicle->peep_tshirt_colours[2], vehicle->peep_tshirt_colours[3]);
            PaintAddImageAsChild(session, image_id, 0, 0, 16, 16, 41, z, -5, -5, z + 1);
        }
        if (vehicle->num_peeps > 4)
        {
            image_id = (baseImage_id + (((directionOffset + 2) & 3) * 3))
                | SPRITE_ID_PALETTE_COLOUR_2(vehicle->peep_tshirt_colours[4], vehicle->peep_tshirt_colours[5]);
            PaintAddImageAsChild(session, image_id, 0, 0, 16, 16, 41, z, -5, -5, z + 1);
        }
        if (vehicle->num_peeps > 6)
        {
            image_id = (baseImage_id + (((directionOffset + 3) & 3) * 3))
                | SPRITE_ID_PALETTE_COLOUR_2(vehicle->peep_tshirt_colours[6], vehicle->peep_tshirt_colours[7]);
            PaintAddImageAsChild(session, image_id, 0, 0, 16, 16, 41, z, -5, -5, z + 1);
        }
    }

    assert(vehicleEntry->effect_visual == 1);
}

/** rct2: 0x006FD1F8 */
static void paint_launched_freefall_base(
    paint_session* session, const Ride* ride, uint8_t trackSequence, uint8_t direction, int32_t height,
    const TrackElement& trackElement)
{
    trackSequence = track_map_3x3[direction][trackSequence];

    int32_t edges = edges_3x3[trackSequence];

    wooden_a_supports_paint_setup(session, (direction & 1), 0, height, session->TrackColours[SCHEME_MISC]);

    StationObject* stationObject = nullptr;
    if (ride != nullptr)
        stationObject = ride_get_station_object(ride);

    track_paint_util_paint_floor(
        session, edges, session->TrackColours[SCHEME_SUPPORTS], height, floorSpritesMetal, stationObject);

    if (ride != nullptr)
    {
        track_paint_util_paint_fences(
            session, edges, session->MapPosition, trackElement, ride, session->TrackColours[SCHEME_TRACK], height,
            fenceSpritesMetal, session->CurrentRotation);
    }

    if (trackSequence == 0)
    {
        uint32_t imageId = SPR_LAUNCHED_FREEFALL_TOWER_BASE | session->TrackColours[SCHEME_TRACK];
        PaintAddImageAsParent(session, imageId, { 0, 0, height }, { 2, 2, 27 }, { 8, 8, height + 3 });

        height += 32;
        imageId = SPR_LAUNCHED_FREEFALL_TOWER_SEGMENT | session->TrackColours[SCHEME_TRACK];
        PaintAddImageAsParent(session, imageId, { 0, 0, height }, { 2, 2, 30 }, { 8, 8, height });

        height += 32;
        imageId = SPR_LAUNCHED_FREEFALL_TOWER_SEGMENT | session->TrackColours[SCHEME_TRACK];
        PaintAddImageAsParent(session, imageId, { 0, 0, height }, { 2, 2, 30 }, { 8, 8, height });

        paint_util_set_vertical_tunnel(session, height + 32);

        height -= 64;
    }

    int32_t blockedSegments = 0;
    switch (trackSequence)
    {
        case 0:
            blockedSegments = SEGMENTS_ALL;
            break;
        case 1:
            blockedSegments = SEGMENT_B8 | SEGMENT_C8 | SEGMENT_B4 | SEGMENT_CC | SEGMENT_BC;
            break;
        case 2:
            blockedSegments = SEGMENT_B4 | SEGMENT_CC | SEGMENT_BC;
            break;
        case 3:
            blockedSegments = SEGMENT_B4 | SEGMENT_CC | SEGMENT_BC | SEGMENT_D4 | SEGMENT_C0;
            break;
        case 4:
            blockedSegments = SEGMENT_B4 | SEGMENT_C8 | SEGMENT_B8;
            break;
        case 5:
            blockedSegments = SEGMENT_BC | SEGMENT_D4 | SEGMENT_C0;
            break;
        case 6:
            blockedSegments = SEGMENT_B4 | SEGMENT_C8 | SEGMENT_B8 | SEGMENT_D0 | SEGMENT_C0;
            break;
        case 7:
            blockedSegments = SEGMENT_B8 | SEGMENT_D0 | SEGMENT_C0 | SEGMENT_D4 | SEGMENT_BC;
            break;
        case 8:
            blockedSegments = SEGMENT_B8 | SEGMENT_D0 | SEGMENT_C0;
            break;
    }
    paint_util_set_segment_support_height(session, blockedSegments, 0xFFFF, 0);
    paint_util_set_segment_support_height(session, SEGMENTS_ALL & ~blockedSegments, height + 2, 0x20);
    paint_util_set_general_support_height(session, height + 32, 0x20);
}

/** rct2: 0x006FD208 */
static void paint_launched_freefall_tower_section(
    paint_session* session, const Ride* ride, uint8_t trackSequence, uint8_t direction, int32_t height,
    const TrackElement& trackElement)
{
    if (trackSequence == 1)
    {
        return;
    }

    uint32_t imageId = SPR_LAUNCHED_FREEFALL_TOWER_SEGMENT | session->TrackColours[SCHEME_TRACK];
    PaintAddImageAsParent(session, imageId, { 0, 0, height }, { 2, 2, 30 }, { 8, 8, height });

    const TileElement* nextTileElement = reinterpret_cast<const TileElement*>(&trackElement) + 1;
    if (trackElement.IsLastForTile() || trackElement.GetClearanceZ() != nextTileElement->GetBaseZ())
    {
        imageId = SPR_LAUNCHED_FREEFALL_TOWER_SEGMENT_TOP | session->TrackColours[SCHEME_TRACK];
        PaintAddImageAsChild(session, imageId, 0, 0, 2, 2, 30, height, 8, 8, height);
    }

    paint_util_set_segment_support_height(session, SEGMENTS_ALL, 0xFFFF, 0);

    paint_util_set_vertical_tunnel(session, height + 32);
    paint_util_set_general_support_height(session, height + 32, 0x20);
}

/**
 * rct2: 0x006FD0E8
 */
TRACK_PAINT_FUNCTION get_track_paint_function_launched_freefall(int32_t trackType)
{
    switch (trackType)
    {
        case TrackElemType::TowerBase:
            return paint_launched_freefall_base;

        case TrackElemType::TowerSection:
            return paint_launched_freefall_tower_section;
    }

    return nullptr;
}
