local function int_lerp(a, b, c)
    return math.floor((1 - c) * a + c * b + 0.5)
end

local function rgb_lerp(a, b, c)
    return {
        int_lerp(a[1], b[1], c),
        int_lerp(a[2], b[2], c),
        int_lerp(a[3], b[3], c),
    }
end

local function hex_to_rgb(hex)
    local ret = {}
    for i = 2,6,2 do -- Skip '#'
        local s = hex:sub(i, i + 1)
        table.insert(ret, tonumber(s, 16))
    end
    return ret
end

local function rgb_to_hex(rgb)
    return string.format("#%x%x%x", unpack(rgb))
end

local function hex_lerp(a, b, c)
    a = hex_to_rgb(a);
    b = hex_to_rgb(b);
    return rgb_to_hex(rgb_lerp(a, b, c))
end

return {
    {
        "AstroNvim/astrotheme",
        optional = true,
        opts = {
            style = {
                simple_syntax_colors = true,
                inactive = false,
            },
            palettes = {
                astrobox = {},
            },
            highlights = {
                global = {
                    modify_hl_groups = function(hl, c)
                        hl.DiffAdd     = { bg = hex_lerp(hl.DiffAdd.bg, c.ui.base, 0.8)}
                        hl.DiffDelete  = { bg = hex_lerp(hl.DiffDelete.bg, c.ui.base, 0.8)}
                        hl.DiffChange  = { bg = hex_lerp(c.ui.blue, c.ui.base, 0.8)}
                        hl.DiffText    = { bg = hex_lerp(hl.DiffText.bg, c.ui.base, 0.8)}
                    end,
                },
                astrobox = {},
            },
        },
    },
    {
        url = "https://git.niverton.tk/niverton/Astrobox.git"
    },
}