--mineable-wreckage yields scrap -- by mewmew

local mining_chance_weights = {
    { name = 'iron-plate',                     chance = 1000 },
    { name = 'iron-gear-wheel',                chance = 750 },
    { name = 'copper-plate',                   chance = 750 },
    { name = 'copper-cable',                   chance = 500 },
    { name = 'electronic-circuit',             chance = 300 },
    { name = 'steel-plate',                    chance = 200 },
    { name = 'solid-fuel',                     chance = 150 },
    { name = 'pipe',                           chance = 100 },
    { name = 'iron-stick',                     chance = 50 },
    { name = 'battery',                        chance = 20 },
    { name = 'barrel',                         chance = 10 },
    { name = 'crude-oil-barrel',               chance = 30 },
    { name = 'lubricant-barrel',               chance = 20 },
    { name = 'petroleum-gas-barrel',           chance = 15 },
    { name = 'sulfuric-acid-barrel',           chance = 15 },
    { name = 'heavy-oil-barrel',               chance = 15 },
    { name = 'light-oil-barrel',               chance = 15 },
    { name = 'water-barrel',                   chance = 10 },
    { name = 'explosives',                     chance = 5 },
    { name = 'advanced-circuit',               chance = 5 },
    { name = 'nuclear-fuel',                   chance = 1 },
    { name = 'pipe-to-ground',                 chance = 10 },
    { name = 'plastic-bar',                    chance = 5 },
    { name = 'processing-unit',                chance = 2 },
    { name = 'depleted-uranium-fuel-cell',     chance = 1 },
    { name = 'uranium-fuel-cell',              chance = 1 },
    { name = 'rocket-fuel',                    chance = 3 },
    { name = 'low-density-structure',          chance = 1 },
    { name = 'heat-pipe',                      chance = 1 },
    { name = 'engine-unit',                    chance = 4 },
    { name = 'electric-engine-unit',           chance = 2 },
    { name = 'logistic-robot',                 chance = 1 },
    { name = 'construction-robot',             chance = 1 },
    { name = 'land-mine',                      chance = 3 },
    { name = 'grenade',                        chance = 10 },
    { name = 'rocket',                         chance = 3 },
    { name = 'explosive-rocket',               chance = 3 },
    { name = 'cannon-shell',                   chance = 2 },
    { name = 'explosive-cannon-shell',         chance = 2 },
    { name = 'uranium-cannon-shell',           chance = 1 },
    { name = 'explosive-uranium-cannon-shell', chance = 1 },
    { name = 'artillery-shell',                chance = 1 },
    { name = 'cluster-grenade',                chance = 2 },
    { name = 'defender-capsule',               chance = 5 },
    { name = 'destroyer-capsule',              chance = 1 },
    { name = 'distractor-capsule',             chance = 2 }
}

local scrap_yield_amounts = {
    ['iron-plate'] = 16,
    ['iron-gear-wheel'] = 8,
    ['iron-stick'] = 16,
    ['copper-plate'] = 16,
    ['copper-cable'] = 24,
    ['electronic-circuit'] = 8,
    ['steel-plate'] = 4,
    ['pipe'] = 8,
    ['solid-fuel'] = 4,
    ['barrel'] = 3,
    ['crude-oil-barrel'] = 3,
    ['lubricant-barrel'] = 3,
    ['petroleum-gas-barrel'] = 3,
    ['sulfuric-acid-barrel'] = 3,
    ['heavy-oil-barrel'] = 3,
    ['light-oil-barrel'] = 3,
    ['water-barrel'] = 3,
    ['battery'] = 2,
    ['explosives'] = 4,
    ['advanced-circuit'] = 2,
    ['nuclear-fuel'] = 0.1,
    ['pipe-to-ground'] = 1,
    ['plastic-bar'] = 4,
    ['processing-unit'] = 1,
    ['depleted-uranium-fuel-cell'] = 1,
    ['uranium-fuel-cell'] = 0.3,
    ['rocket-fuel'] = 0.3,
    ['low-density-structure'] = 0.3,
    ['heat-pipe'] = 1,
    ['engine-unit'] = 2,
    ['electric-engine-unit'] = 2,
    ['logistic-robot'] = 0.3,
    ['construction-robot'] = 0.3,
    ['land-mine'] = 1,
    ['grenade'] = 2,
    ['rocket'] = 2,
    ['explosive-rocket'] = 2,
    ['cannon-shell'] = 2,
    ['explosive-cannon-shell'] = 2,
    ['uranium-cannon-shell'] = 2,
    ['explosive-uranium-cannon-shell'] = 2,
    ['artillery-shell'] = 0.3,
    ['cluster-grenade'] = 0.3,
    ['defender-capsule'] = 2,
    ['destroyer-capsule'] = 0.3,
    ['distractor-capsule'] = 0.3
}

local scrap_raffle = {}
for _, t in pairs(mining_chance_weights) do
    for _ = 1, t.chance, 1 do
        table.insert(scrap_raffle, t.name)
    end
end

local size_of_scrap_raffle = #scrap_raffle

local function on_player_mined_entity(event)
    local scraps = {
        ['crash-site-spaceship-wreck-small-1'] = true,
        ['crash-site-spaceship-wreck-small-2'] = true,
        ['crash-site-spaceship-wreck-small-3'] = true,
        ['crash-site-spaceship-wreck-small-4'] = true,
        ['crash-site-spaceship-wreck-small-5'] = true,
        ['crash-site-spaceship-wreck-small-6'] = true,
        ['mineable-wreckage'] = true
    }
    local entity = event.entity
    if not entity.valid then
        return
    end
    if not scraps[entity.name] then
        return
    end

    event.buffer.clear()

    local scrap = scrap_raffle[math.random(1, size_of_scrap_raffle)]

    local amount_bonus = (game.forces.enemy.evolution_factor * 2) + (game.forces.player.mining_drill_productivity_bonus * 2)
    local r1 = math.ceil(scrap_yield_amounts[scrap] * (0.3 + (amount_bonus * 0.3)))
    local r2 = math.ceil(scrap_yield_amounts[scrap] * (1.7 + (amount_bonus * 1.7)))
    local amount = math.random(r1, r2)

    local player = game.players[event.player_index]
    local inserted_count = player.insert({ name = scrap, count = amount })

    if inserted_count ~= amount then
        local amount_to_spill = amount - inserted_count
        entity.surface.spill_item_stack(entity.position, { name = scrap, count = amount_to_spill }, true)
    end

    entity.surface.create_entity(
        {
            name = 'flying-text',
            position = entity.position,
            text = '+' .. amount .. ' [img=item/' .. scrap .. ']',
            color = { r = 0.98, g = 0.66, b = 0.22 }
        }
    )
end

local Event = require 'utils.event'
Event.add(defines.events.on_player_mined_entity, on_player_mined_entity)