local _ENV = mkmodule('makeown')
--[[
    'tweak makeown' as a lua include
    make_own(unit)        -- removes foreign flags, sets civ_id to fort civ_id, and sets clothes ownership
    make_citizen(unit)    -- called by make_own if unit.race == fort race

    eventually ought to migrate to hack/lua/plugins/tweak.lua
    and local _ENV = mkmodule('plugin.tweak')
    in order to link to functions in the compiled plugin (when/if they become available to lua)
--]]
local utils = require 'utils'


local function fix_clothing_ownership(unit)
    -- extracted/translated from tweak makeown plugin
    -- to be called by tweak-fixmigrant/makeown
    -- units forced into the fort by removing the flags do not own their clothes
    -- which has the result that they drop all their clothes and become unhappy because they are naked
    -- so we need to make them own their clothes and add them to their uniform
    local fixcount = 0    --int fixcount = 0;
    for j=0,#unit.inventory-1 do    --for(size_t j=0; j<unit->inventory.size(); j++)
        local inv_item = unit.inventory[j]    --unidf::unit_inventory_item* inv_item = unit->inventory[j];
        local item = inv_item.item    --df::item* item = inv_item->item;
        -- unforbid items (for the case of kidnapping caravan escorts who have their stuff forbidden by default)
        -- moved forbid false to inside if so that armor/weapons stay equiped
        if inv_item.mode == df.unit_inventory_item.T_mode.Worn then --if(inv_item->mode == df::unit_inventory_item::T_mode::Worn)
            -- ignore armor?
            -- it could be leather boots, for example, in which case it would not be nice to forbid ownership
            --if(item->getEffectiveArmorLevel() != 0)
            --    continue;

            if not dfhack.items.getOwner(item) then    --if(!Items::getOwner(item))
                if dfhack.items.setOwner(item,unit) then    --if(Items::setOwner(item, unit))
                    item.flags.forbid = false    --inv_item->item->flags.bits.forbid = 0;
                    -- add to uniform, so they know they should wear their clothes
                    unit.military.uniforms[0]:insert('#',item.id)    --insert_into_vector(unit->military.uniforms[0], item->id);
                    fixcount = fixcount + 1    --fixcount++;
                else
                    ----out << "could not change ownership for item!" << endl;
                    print("Makeown: could not change ownership for an item!")
                end
            end
        end
    end
    -- clear uniform_drop (without this they would drop their clothes and pick them up some time later)
    -- dirty?
    unit.military.uniform_drop:resize(0)    --unit->military.uniform_drop.clear();
    ----out << "ownership for " << fixcount << " clothes fixed" << endl;
    print("Makeown: claimed ownership for "..tostring(fixcount).." worn items")
    --return true    --return CR_OK;
end

local function entity_link(hf, eid, do_event, add, replace_idx)
    do_event = (do_event == nil) and true or do_event
    add = (add == nil) and true or add
    replace_idx = replace_idx or -1

    local link = add and df.histfig_entity_link_memberst:new() or df.histfig_entity_link_former_memberst:new()
    link.entity_id = eid
    if replace_idx > -1 then
        local e = hf.entity_links[replace_idx]
        link.link_strength = (e.link_strength > 3) and (e.link_strength - 2) or e.link_strength
        hf.entity_links[replace_idx] = link -- replace member link with former member link
        e:delete()
    else
        link.link_strength =  100
        hf.entity_links:insert('#', link)
    end
    if do_event then
        event = add and df.history_event_add_hf_entity_linkst:new() or df.history_event_remove_hf_entity_linkst:new()
        event.year = df.global.cur_year
        event.seconds = df.global.cur_year_tick
        event.civ = eid
        event.histfig = hf.id
        event.link_type = 0
        event.position_id = -1
        event.id = df.global.hist_event_next_id
        df.global.world.history.events:insert('#',event)
        df.global.hist_event_next_id = df.global.hist_event_next_id + 1
    end
end

local function change_state(hf, site_id, pos)
    hf.info.unk_14.unk_0 = 3    -- state? arrived?
    hf.info.unk_14.region:assign(pos)
    hf.info.unk_14.site = site_id
    event = df.history_event_change_hf_statest:new()
    event.year = df.global.cur_year
    event.seconds = df.global.cur_year_tick
    event.hfid = hf.id
    event.state = 3
    event.site = site_id
    event.region_pos:assign(pos)
    event.substate = -1; event.region = -1; event.layer = -1;
    event.id = df.global.hist_event_next_id
    df.global.world.history.events:insert('#',event)
    df.global.hist_event_next_id = df.global.hist_event_next_id + 1
end


function make_citizen(unit)
    local dfg = df.global
    local civ_id = dfg.ui.civ_id
    local group_id = dfg.ui.group_id
    local events = dfg.world.history.events
    local fortent = dfg.ui.main.fortress_entity
    local civent = fortent and df.historical_entity.find(fortent.entity_links[0].target)
        -- utils.binsearch(dfg.world.entities.all, fortent.entity_links[0].target, 'id')
    local event
    local region_pos = df.world_site.find(dfg.ui.site_id).pos -- used with state events and hf state

    local hf
    -- assume that hf id 1 and hf id 2 are equal.  I am unaware of instances of when they are not.
    -- occationally a unit does not have both flags set (missing flags1.important_historical_figure)
    -- and I don't know what that means yet.
    if unit.flags1.important_historical_figure and unit.flags2.important_historical_figure then
        -- aready hf, find it (unlikely to happen)
        hf = utils.binsearch(dfg.world.history.figures, unit.hist_figure_id, 'id')
    --elseif unit.flags1.important_historical_figure or unit.flags2.important_historical_figure then
        -- something wrong, try to fix it?
        --[[
        if unit.hist_figure_id == -1 then
            unit.hist_figure_id = unit.hist_figure_id2
        end
        if unit.hist_figure_id > -1 then
            unit.hist_figure_id2 = unit.hist_figure_id
            unit.flags1.important_historical_figure = true
            unit.flags2.important_historical_figure = true
            hf = utils.binsearch(dfg.world.history.figures, unit.hist_figure_id, 'id')
        else
            unit.flags1.important_historical_figure = false
            unit.flags2.important_historical_figure = false
        end
        --]]
    --else
        -- make one
    end
    --local new_hf = false
    if not hf then
        --new_hf = true
        hf = df.historical_figure:new()
        hf.profession = unit.profession
        hf.race = unit.race
        hf.caste = unit.caste
        hf.sex = unit.sex
        hf.appeared_year = dfg.cur_year
        hf.born_year = unit.birth_year
        hf.born_seconds = unit.birth_time
        hf.curse_year = unit.curse_year
        hf.curse_seconds = unit.curse_time
        hf.birth_year_bias=unit.bias_birth_bias
        hf.birth_time_bias=unit.birth_time_bias
        hf.old_year = unit.old_year
        hf.old_seconds = unit.old_time
        hf.died_year = -1
        hf.died_seconds = -1
        hf.name:assign(unit.name)
        hf.civ_id = unit.civ_id
        hf.population_id  = unit.population_id
        hf.breed_id = -1
        hf.unit_id = unit.id
        hf.id = dfg.hist_figure_next_id -- id must be set before adding links (for the events)

        --history_event_add_hf_entity_linkst not reported for civ on starting 7
        entity_link(hf, civ_id, false) -- so lets skip event here
        entity_link(hf, group_id)

        hf.info = df.historical_figure_info:new()
        hf.info.unk_14 = df.historical_figure_info.T_unk_14:new() -- hf state?
        --unk_14.region_id = -1; unk_14.beast_id = -1; unk_14.unk_14 = 0
        hf.info.unk_14.unk_18 = -1; hf.info.unk_14.unk_1c = -1
        -- set values that seem related to state and do event
        change_state(hf, dfg.ui.site_id, region_pos)


        --lets skip skills for now
        --local skills = df.historical_figure_info.T_skills:new() -- skills snap shot
        -- ...
        --info.skills = skills

        dfg.world.history.figures:insert('#', hf)
        dfg.hist_figure_next_id = dfg.hist_figure_next_id + 1

        --new_hf_loc = df.global.world.history.figures[#df.global.world.history.figures - 1]
        fortent.histfig_ids:insert('#', hf.id)
        fortent.hist_figures:insert('#', hf)
        civent.histfig_ids:insert('#', hf.id)
        civent.hist_figures:insert('#', hf)

        unit.flags1.important_historical_figure = true
        unit.flags2.important_historical_figure = true
        unit.hist_figure_id = hf.id
        unit.hist_figure_id2 = hf.id
        print("Makeown-citizen: created historical figure")
    else
        -- only insert into civ/fort if not already there
        -- Migrants change previous histfig_entity_link_memberst to histfig_entity_link_former_memberst
        -- for group entities, add link_member for new group, and reports events for remove from group,
        -- remove from civ, change state, add civ, and add group

        hf.civ_id = civ_id -- ensure current civ_id

        local found_civlink = false
        local found_fortlink = false
        local v = hf.entity_links
        for k=#v-1,0,-1 do
            if df.histfig_entity_link_memberst:is_instance(v[k]) then
                entity_link(hf, v[k].entity_id, true, false, k)
            end
        end

        if hf.info and hf.info.unk_14 then
            change_state(hf, dfg.ui.site_id, region_pos)
            -- leave info nil if not found for now
        end

        if not found_civlink then    entity_link(hf,civ_id)        end
        if not found_fortlink then    entity_link(hf,group_id)    end

        --change entity_links
        local found = false
        for _,v in ipairs(civent.histfig_ids) do
            if v == hf.id then found = true; break end
        end
        if not found then
            civent.histfig_ids:insert('#', hf.id)
            civent.hist_figures:insert('#', hf)
        end
        found = false
        for _,v in ipairs(fortent.histfig_ids) do
            if v == hf.id then found = true; break end
        end
        if not found then
            fortent.histfig_ids:insert('#', hf.id)
            fortent.hist_figures:insert('#', hf)
        end
        print("Makeown-citizen: migrated historical figure")
    end    -- hf

    local nemesis = dfhack.units.getNemesis(unit)
    if not nemesis then
        nemesis = df.nemesis_record:new()
        nemesis.figure = hf
        nemesis.unit = unit
        nemesis.unit_id = unit.id
        nemesis.save_file_id = civent.save_file_id
        nemesis.unk10, nemesis.unk11, nemesis.unk12 = -1, -1, -1
        --group_leader_id = -1
        nemesis.id = dfg.nemesis_next_id
        nemesis.member_idx = civent.next_member_idx
        civent.next_member_idx = civent.next_member_idx + 1

        dfg.world.nemesis.all:insert('#', nemesis)
        dfg.nemesis_next_id = dfg.nemesis_next_id + 1

        nemesis_link = df.general_ref_is_nemesisst:new()
        nemesis_link.nemesis_id = nemesis.id
        unit.general_refs:insert('#', nemesis_link)

        --new_nemesis_loc = df.global.world.nemesis.all[#df.global.world.nemesis.all - 1]
        fortent.nemesis_ids:insert('#', nemesis.id)
        fortent.nemesis:insert('#', nemesis)
        civent.nemesis_ids:insert('#', nemesis.id)
        civent.nemesis:insert('#', nemesis)
        print("Makeown-citizen: created nemesis entry")
    else-- only insert into civ/fort if not already there
        local found = false
        for _,v in ipairs(civent.nemesis_ids) do
            if v == nemesis.id then found = true; break end
        end
        if not found then
            civent.nemesis_ids:insert('#', nemesis.id)
            civent.nemesis:insert('#', nemesis)
        end
        found = false
        for _,v in ipairs(fortent.nemesis_ids) do
            if v == nemesis.id then found = true; break end
        end
        if not found then
            fortent.nemesis_ids:insert('#', nemesis.id)
            fortent.nemesis:insert('#', nemesis)
        end
        print("Makeown-citizen: migrated nemesis entry")
    end -- nemesis
end


function make_own(unit)
    --tweak makeown
    unit.flags2.resident = false; unit.flags1.merchant = false; unit.flags1.forest = false;
    unit.civ_id = df.global.ui.civ_id
    if unit.profession == df.profession.MERCHANT then unit.profession = df.profession.TRADER end
    if unit.profession2 == df.profession.MERCHANT then unit.profession2 = df.profession.TRADER end
    fix_clothing_ownership(unit)
    if unit.race == df.global.ui.race_id then
        make_citizen(unit)
    end
end



return _ENV