---
--- Generated by EmmyLua(https://github.com/EmmyLua)
--- Created by lars.
--- DateTime: 11.03.19 18:28
---

log.create_channel("deathlist") -- Create log channel

local coordinate={type="table",
                  children={
                      x={type="number"},
                      y={type="number"}
                  }}
local color={type="table",
                  children={
                      r={type="number", interval={0,255}},
                      g={type="number", interval={0,255}},
                      b={type="number", interval={0,255}}
                  }}
local node_caused={children={
    color=color,
    method={type="string"},
    nodes={type="table", keys={type="string"}, values={type="table", keys={possible_values={name=true, color=true, method=true}}}},
}}
local config=conf.import("deathlist",{
    type="table",
    children={
        max_messages={type="number", interval={1}},
        mode={type="string", possible_values={list=true,stack=true}},
        autoremove_interval={func=function(interval)
            if type(interval) ~= "number" and interval ~= false then
                return "Wrong type : Expected number or false, found "..type(interval)
            end
            if interval <= 0 then
                return "Too small : Interval has to be > 0"
            end
        end},
        hud_pos=coordinate,
        hud_base_offset=coordinate,
        enable_environmental={type="boolean"},
        enable_unknown={type="boolean"},
        enable_forbidden_playernames={type="boolean"},

        environmental_reasons={
            children={
                falling={
                    children={
                        name={type="string"},
                        color=color,
                        method={type="string"}
                    }
                },
                unknown={
                    children={
                        name={type="string"},
                        color=color,
                        method={type="string"}
                    }
                },
                drowning=node_caused,
                node_damage=node_caused
            }
        }
    }
})

table_ext.add_all(getfenv(1), config)

if enable_forbidden_playernames then
    player_ext.register_forbidden_name(environmental_reasons.falling.name)
    if enable_unknown then
        player_ext.register_forbidden_name(environmental_reasons.unknown.name)
    end
    for name, node in pairs(minetest.registered_nodes) do
        if (node.drowning or 0) > 0 then
            local title=(environmental_reasons.drowning.nodes[name] or {}).name or node.description
            player_ext.register_forbidden_name(title)
        end
        if (node.damage_per_second or 0) > 0 then
            local title=(environmental_reasons.node_damage.nodes[name] or {}).name or node.description
            player_ext.register_forbidden_name(title)
        end
    end
end

table_ext.map(environmental_reasons, function(v)
    v.color=mt_ext.get_color_int(v.color)
    return v
end)

table_ext.map(environmental_reasons.drowning.nodes, function(v)
    if v.color then v.color=mt_ext.get_color_int(v.color) end
    return v
end)

table_ext.map(environmental_reasons.node_damage.nodes, function(v)
    if v.color then v.color=mt_ext.get_color_int(v.color) end
    return v
end)

hud_channels ={ killers={}, items={}, victims={}} -- in order to reduce overhead

minetest.register_on_joinplayer(function(player)
    hud_channels.killers[player:get_player_name()]={}
    hud_channels.items[player:get_player_name()]={}
    hud_channels.victims[player:get_player_name()]={}
end)

minetest.register_on_leaveplayer(function(player)
    hud_channels.killers[player:get_player_name()]=nil
    hud_channels.items[player:get_player_name()]=nil
    hud_channels.victims[player:get_player_name()]=nil
end)

function remove_last_kill_msg_from_hud(listname, x_offset)
    local list= hud_channels[listname]
    for _,player in pairs(minetest.get_connected_players()) do
        local name=player:get_player_name()
        local hud_ids=list[name]
        local i=#list[name]
        if mode=="list" then
            player:hud_remove(hud_ids[i])
            hud_ids[i]=nil
        else
            player:hud_remove(hud_ids[1]) -- Will be replaced
            for j=2,i do
                local new={x=hud_base_offset.x+x_offset,y=hud_base_offset.y-((j-2)*20)}
                player:hud_change(hud_ids[j],"offset",new)
                hud_ids[j-1]=hud_ids[j] --Perform index shift
            end
            hud_ids[i]=nil
        end
        list[name]=hud_ids
    end
end

function remove_last_kill_message()
    if not threading_ext.request("deathlist.hud_lists",remove_last_kill_message) then return end
    remove_last_kill_msg_from_hud("killers",-20)
    remove_last_kill_msg_from_hud("victims",20)
    remove_last_kill_msg_from_hud("items",0)
    threading_ext.free("deathlist.hud_lists")
end

local last_message=0

if autoremove_interval then
    minetest.register_globalstep(function(dtime)
        last_message=last_message+dtime
        if last_message > autoremove_interval then
            remove_last_kill_message()
            last_message=0
        end
    end)
end

function add_kill_msg_to_hud(msg, listname, hud_def, x_offset) -- MAY NOT BE CALLED SIMULTANEOUSLY
    local _, value=next(hud_channels[listname])
    if table_ext.is_empty(value) then
        last_message=0
    end
    local list= hud_channels[listname]
    hud_def.text=msg
    hud_def.offset={x=x_offset+hud_base_offset.x}
    for _,player in pairs(minetest.get_connected_players()) do
        local name=player:get_player_name()
        local hud_ids=list[name] --Hud elem IDs
        hud_ids=list[name] or {}
        local i=#hud_ids
        if (i == max_messages) then --Have to remove
            if mode=="list" then
                player:hud_remove(hud_ids[i])
            else
                player:hud_remove(hud_ids[1]) -- Will be replaced
                for j=2,i do
                    local new={x=hud_def.offset.x,y=hud_base_offset.y-((j-2)*20)}
                    player:hud_change(hud_ids[j],"offset",new)
                    hud_ids[j-1]=hud_ids[j] --Perform index shift
                end
            end
            i=i-1
        end
        if mode=="list" then
            for j=i,1,-1 do
                local new={x=hud_def.offset.x,y=hud_base_offset.y-(j*20)}
                player:hud_change(hud_ids[j],"offset",new)
                hud_ids[j+1]=hud_ids[j] --Perform index shift
            end
            hud_def.offset.y=hud_base_offset.y
            hud_ids[1]=player:hud_add(hud_def)
        else
            hud_def.offset.y=hud_base_offset.y-(i*20)
            hud_ids[i+1]=player:hud_add(hud_def)
        end
        list[name]=hud_ids --Update IDs
    end
end

function add_kill_message(killer, tool_image, victim)
    if not threading_ext.request("deathlist.hud_lists",add_kill_message, killer, tool_image, victim) then return end
    add_kill_msg_to_hud(killer.name,"killers",{hud_elem_type="text",position=hud_pos,scale={x=100,y=100}, number=killer.color or 0xFFFFFF, alignment = {x=-1,y=0}},-20)
    add_kill_msg_to_hud(victim.name,"victims",{hud_elem_type="text",position=hud_pos,number=victim.color or 0xFFFFFF,alignment = {x=1,y=0}},20)
    add_kill_msg_to_hud((tool_image or "deathlist_tombstone.png").."^[resize:16x16", "items",{hud_elem_type="image",position=hud_pos,scale={x=1,y=1}, alignment = {x=0,y=0}},0)
    threading_ext.free("deathlist.hud_lists")
end

function add_environmental_kill_message(cause, victim) --Falling & Unknown
    add_kill_message({name=environmental_reasons[cause].name, color=environmental_reasons[cause].color},
            environmental_reasons[cause].method,victim)
end

function add_node_kill_message(killing_node, cause, victim) --Drowning & Node Damage
    local override=environmental_reasons[cause].nodes[killing_node.name] or {}
    local method=override.method or environmental_reasons[cause].method
    if method=="generate" then
        method=mt_ext.get_node_inventory_image(killing_node.name)
    end
    add_kill_message({name=override.name or killing_node.description,
                      color=override.color or environmental_reasons[cause].color},
            method,
            victim)
end

if enable_environmental then
    minetest.register_on_player_hpchange(
        function(player, hp_change, reason)
            if player:get_hp() > 0 and player:get_hp()+hp_change <= 0 then
                local victim={name=player:get_player_name(), color=player_ext.get_color_int(player)}
                if reason.type=="fall" then
                    add_environmental_kill_message("falling", victim)
                    log.write("deathlist","Player "..victim.name.." died due to falling")
                elseif reason.type=="drown" then
                    local eye_pos=vector.add(player:get_pos(), {x=0, z=0, y=player:get_properties().eye_height})
                    local drowning_node=minetest.registered_nodes[minetest.get_node(eye_pos).name]
                    add_node_kill_message(drowning_node, "drowning", victim)
                    log.write("deathlist","Player "..victim.name.." died due to drowning in "..drowning_node.name)
                elseif reason.type=="node_damage" then
                    local killing_node_feet=minetest.registered_nodes[minetest.get_node(player:get_pos()).name]
                    local eye_pos=vector.add(player:get_pos(), {x=0, z=0, y=player:get_properties().eye_height})
                    local killing_node_head=minetest.registered_nodes[minetest.get_node(eye_pos).name]
                    local killing_node=killing_node_feet
                    if (killing_node_head.node_damage or 0) > (killing_node_feet.node_damage or 0) then
                        killing_node=killing_node_head
                    end
                    add_node_kill_message(killing_node, "node_damage", victim)
                    log.write("deathlist","Player "..victim.name.." died due to node damage of "..killing_node.name)
                elseif reason.type~="punch" and enable_unknown then
                    add_environmental_kill_message("unknown", victim)
                    log.write("deathlist","Player "..victim.name.." died for unknown reasons.")
                end
            end
        end
    )
end

minetest.register_on_punchplayer(function(player, hitter, time_from_last_punch, tool_capabilities, dir, damage)
    if player:get_hp() > 0 and player:get_hp()-damage <= 0 and hitter then
        local wielded_item_name=hitter:get_wielded_item():get_name()
        local tool
        if minetest.registered_nodes[wielded_item_name] then
            tool=mt_ext.get_node_inventory_image(wielded_item_name)
        else
            tool=(minetest.registered_items[wielded_item_name] or {inventory_image="deathlist_gravestone.png"}).inventory_image
        end
        local killer={name=hitter:get_player_name(), color=player_ext.get_color_int(hitter)}
        local victim={name=player:get_player_name(), color=player_ext.get_color_int(player)}
        add_kill_message(killer,tool,victim)
        log.write("deathlist","Player "..killer.name.." killed "..victim.name.." using "..wielded_item_name)
    end
end )