local cairo_loaded, cairo = pcall(require, "cairo")
if not cairo_loaded then
    cairo = require("lualib.cairo")
end

function draw_eq_bar(cr, x, y, percent, segments)
    local seg_height = 4
    local seg_width = 30
    local gap = 2
    local lit_segments = math.ceil((percent / 100) * segments)

    for i = 1, segments do
        if i > (segments - 2) then
            cairo_set_source_rgba(cr, 1.0, 0.2, 0.2, i <= lit_segments and 1.0 or 0.15)
        else
            cairo_set_source_rgba(cr, 0.2, 1.0, 0.2, i <= lit_segments and 1.0 or 0.15)
        end
        
        local seg_y = y - (i * (seg_height + gap))
        cairo_rectangle(cr, x, seg_y, seg_width, seg_height)
        cairo_fill(cr)
    end
end

function conky_main()
    if conky_window == nil then return end
    
    local cs = cairo_xlib_surface_create(conky_window.display, conky_window.drawable, conky_window.visual, conky_window.width, conky_window.height)
    if cs == nil then return end
    
    local cr = cairo_create(cs)
    if cr == nil then 
        cairo_surface_destroy(cs)
        return 
    end

    -- Fehlerfreie Temperatur-Zuweisung ohne verschachtelte Anführungszeichen
    local temp_val = tonumber(conky_parse('${hwmon 0 temp 1}')) or tonumber(conky_parse('${hwmon 1 temp 1}')) or 40

    local values = {
        tonumber(conky_parse('${cpu cpu1}')) or 0,
        tonumber(conky_parse('${cpu cpu2}')) or 0,
        tonumber(conky_parse('${memperc}')) or 0,
        tonumber(conky_parse('${swapperc}')) or 0,
        tonumber(conky_parse('${fs_used_perc /home}')) or 0,
        tonumber(conky_parse('${fs_free_perc /}')) or 0,
        math.min(100, (tonumber(conky_parse('${downspeedf}')) or 0) * 10),
        math.min(100, (tonumber(conky_parse('${upspeedf}')) or 0) * 10),
        tonumber(conky_parse('${wireless_link_qual_perc}')) or 0,
        0, 
        math.min(100, temp_val * 1.2)
    }

    -- Balken-Basis (Y-Achse nach unten verschoben, um Platz für den Knopf zu machen)
    local start_x = 40
    local base_y = 260
    local spacing = 85

    for i, val in ipairs(values) do
        draw_eq_bar(cr, start_x + (i-1) * spacing, base_y, val, 8)
    end

    -- Großer Drehregler (Sichtbar und zentriert über den Balken)
    local cpu_total = tonumber(conky_parse('${cpu cpu0}')) or 0
    local center_x = 512
    local center_y = 110
    local radius = 45

    local pat = cairo_pattern_create_radial(center_x-10, center_y-10, 5, center_x, center_y, radius)
    cairo_pattern_add_color_stop_rgb(pat, 0, 0.9, 0.85, 0.8)
    cairo_pattern_add_color_stop_rgb(pat, 1, 0.5, 0.45, 0.4)
    cairo_set_source(cr, pat)
    cairo_arc(cr, center_x, center_y, radius, 0, 2 * math.pi)
    cairo_fill(cr)
    cairo_pattern_destroy(pat)

    local angle = 135 + (cpu_total / 100) * 270
    local rad_angle = angle * math.pi / 180
    local line_x = center_x + (radius - 10) * math.cos(rad_angle)
    local line_y = center_y + (radius - 10) * math.sin(rad_angle)

    cairo_set_source_rgb(cr, 0.7, 0.2, 0.2)
    cairo_set_line_width(cr, 3)
    cairo_move_to(cr, center_x + (radius - 25) * math.cos(rad_angle), center_y + (radius - 25) * math.sin(rad_angle))
    cairo_line_to(cr, line_x, line_y)
    cairo_stroke(cr)

    cairo_set_source_rgb(cr, 1, 1, 1)
    cairo_select_font_face(cr, "DejaVu Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD)
    cairo_set_font_size(cr, 11)
    cairo_move_to(cr, center_x - radius - 25, center_y + radius)
    cairo_show_text(cr, "MIN")
    cairo_move_to(cr, center_x + radius, center_y + radius)
    cairo_show_text(cr, "MAX")

    cairo_destroy(cr)
    cairo_surface_destroy(cs)
end