--NPCManager is required for setting basic NPC properties
local npcManager = require("npcManager")
local bulbulNPC = require("npcs/ai/snailicorn")

--Create the library table
local bulbulNPC = {}
--NPC_ID is dynamic based on the name of the library file
local npcID = NPC_ID

--Defines NPC config for our NPC. You can remove superfluous definitions.
local bulbulNPCSettings = {
    id = npcID,
    --Sprite size
    gfxheight = 70,
    gfxwidth = 50,
    --Hitbox size. Bottom-center-bound to sprite size.
    width = 34,
    height = 66,
    --Sprite offset from hitbox for adjusting hitbox anchor on sprite.
    gfxoffsetx = 0,
    gfxoffsety = 0,
    --Frameloop-related
    frames = 4,
    framestyle = 0,
    framespeed = 8, --# frames between frame change
    --Movement speed. Only affects speedX by default.
    speed = 1,
    --Collision-related
    npcblock = false,
    npcblocktop = false, --Misnomer, affects whether thrown NPCs bounce off the NPC.
    playerblock = false,
    playerblocktop = false, --Also handles other NPCs walking atop this NPC.

    nohurt=false,
    nogravity = false,
    noblockcollision = false,
    nofireball = false,
    noiceball = false,
    noyoshi= true,
    nowaterphysics = false,
    --Various interactions
    jumphurt = false, --If true, spiny-like
    spinjumpsafe = false, --If true, prevents player hurt when spinjumping
    harmlessgrab = false, --Held NPC hurts other NPCs if false
    harmlessthrown = false, --Thrown NPC hurts other NPCs if false

    --Emits light if the Darkness feature is active:
    --lightradius = 100,
    --lightbrightness = 1,
    --lightoffsetx = 0,
    --lightoffsety = 0,
    --lightcolor = Color.white,

    --Define custom properties below
}

--Applies NPC settings
npcManager.setNpcSettings(bulbulNPCSettings)

--Register the vulnerable harm types for this NPC. The first table defines the harm types the NPC should be affected by, while the second maps an effect to each, if desired.
npcManager.registerHarmTypes(npcID,
    {
        HARM_TYPE_JUMP,
        --HARM_TYPE_FROMBELOW,
        --HARM_TYPE_NPC,
        HARM_TYPE_PROJECTILE_USED,
        --HARM_TYPE_LAVA,
        --HARM_TYPE_HELD,
        --HARM_TYPE_TAIL,
        HARM_TYPE_SPINJUMP,
        --HARM_TYPE_OFFSCREEN,
        HARM_TYPE_SWORD
    },
    {
        [HARM_TYPE_JUMP]=63,
        --[HARM_TYPE_FROMBELOW]=10,
        --[HARM_TYPE_NPC]=10,
        [HARM_TYPE_PROJECTILE_USED]=63,
        --[HARM_TYPE_LAVA]={id=13, xoffset=0.5, xoffsetBack = 0, yoffset=1, yoffsetBack = 1.5},
        --[HARM_TYPE_HELD]=10,
        --[HARM_TYPE_TAIL]=10,
        [HARM_TYPE_SPINJUMP]=63,
        --[HARM_TYPE_OFFSCREEN]=10,
        [HARM_TYPE_SWORD]=63,
    }
);

--Custom local definitions below

--Register events
function bulbulNPC.onInitAPI()
    --npcManager.registerEvent(npcID, bulbulNPC, "onTickNPC")
    npcManager.registerEvent(npcID, bulbulNPC, "onTickEndNPC")
    --npcManager.registerEvent(npcID, bulbulNPC, "onDrawNPC")
    registerEvent(bulbulNPC, "onNPCHarm")
    registerEvent(npcID, bulbulNPC, "onTickEnd")
end

function bulbulNPC.onTickEndNPC(v)
    --Don't act during time freeze
    if Defines.levelFreeze then return end

    local data = v.data


    --If despawned
    if v.despawnTimer <= 0 then
        --Reset our properties, if necessary
        data.initialized = false
        return
    end

    --Initialize
    if not data.initialized then
        --Initialize necessary data.
        data.initialized = true
        data.health = 4
    end

    --Depending on the NPC, these checks must be handled differently
    if v:mem(0x12C, FIELD_WORD) > 0    --Grabbed
    or v:mem(0x136, FIELD_BOOL)        --Thrown
    or v:mem(0x138, FIELD_WORD) > 0    --Contained within
    then
        --Handling
        return
    end
end

    --v.speedX = v.speedX * 0.92

    --if math.abs(v.speedX) < 0.1 then
        --v.speedX = 0
    --end

    --v.speedY = 1 + 0.1

    --Execute main AI. This template just jumps when it touches the ground.
    --if v.collidesBlockBottom then
        --v.speedY = v.speedX * 1.2
        --v.speedX = 1.3 * v.direction
    --end
--end

function bulbulNPC.onNPCHarm(eventObj, v, killReason, culprit)
    local data = v.data
    if v.id ~= npcID then return end

    if killReason == HARM_TYPE_JUMP or killReason == HARM_TYPE_SWORD then

        data.health = data.health - 1
        SFX.play(82)

        if data.health ~= 0 then
            eventObj.cancelled = true
        end
    end

    --elseif killReason == HARM_TYPE_ SPINJUMP then

        --data.health = data.health - 2
        --SFX.play(82)

        --if data.health ~= 0 then
            --eventObj.cancelled = true
        --end

    --elseif killReason == HARM_TYPE_PROJECTILE_USED then

        --data.health = data.health - 2
        --SFX.play(82)

        --if data.health ~= 0 then
            --eventObj.cancelled = true
        --end
    --end
end

function bulbulNPC.onTickEnd(v)
    local data = v.data
    if data.health == nil then
        data.health = 4
    end
    if data.health == 4 then
        v.animationFrame = math.floor((lunatime.tick()/interval) % 8)
    elseif data.health == 3 then
        v.animationFrame = math.floor((lunatime.tick()/interval) % 8) + 8
    end
end

--Gotta return the library table!
return bulbulNPC