#!/usr/bin/env bash
#
# A script to create Telegram palettes that use colors generated by pywal/wal.
# Requires pywal or wal, bash and cat.

# shellcheck source=/dev/null
. "${HOME}/.cache/wal/colors.sh"

# Prepare the conditions for the other functions.
prepare() {
  pre="${HOME}/.cache/wal-telegram"
  mkdir -p "$pre"
  rm -f "${pre}/background".*
  rm -f "${pre}/colors.tdesktop-palette"
  wal_path="$(<"${HOME}/.cache/wal/wal")"
  wal_ext="${wal_path##*.}"
  cp "$wal_path" "${pre}/background.${wal_ext}"
}

# Lighten/darken by 20%, 30%, 40%, 50%, 60% some colors using only pure bash.
create_colors() {
  colors=(0 1 2 7)
  for i in "${colors[@]}"; do
    color="color${i}"
    c_rgb_12d="$(( 0x"${!color:1:2}" ))"
    c_rgb_34d="$(( 0x"${!color:3:2}" ))"
    c_rgb_56d="$(( 0x"${!color:5:2}" ))"
    c_rgb_12d_20l="$(( c_rgb_12d + "$((c_rgb_12d / 5))" ))"
    c_rgb_34d_20l="$(( c_rgb_34d + "$((c_rgb_34d / 5))" ))"
    c_rgb_56d_20l="$(( c_rgb_56d + "$((c_rgb_56d / 5))" ))"
    [[ "${c_rgb_12d_20l}" -ge 255 ]] && c_rgb_12d_20l=255
    [[ "${c_rgb_34d_20l}" -ge 255 ]] && c_rgb_34d_20l=255
    [[ "${c_rgb_56d_20l}" -ge 255 ]] && c_rgb_56d_20l=255
    printf -v c_hex_12d_20l '%x' "$c_rgb_12d_20l"
    printf -v c_hex_34d_20l '%x' "$c_rgb_34d_20l"
    printf -v c_hex_56d_20l '%x' "$c_rgb_56d_20l"
    [[ "${#c_hex_12d_20l}" -eq 1 ]] && c_hex_12d_20l="0${c_hex_12d_20l}"
    [[ "${#c_hex_34d_20l}" -eq 1 ]] && c_hex_34d_20l="0${c_hex_34d_20l}"
    [[ "${#c_hex_56d_20l}" -eq 1 ]] && c_hex_56d_20l="0${c_hex_56d_20l}"
    c_hex_20l="#${c_hex_12d_20l}${c_hex_34d_20l}${c_hex_56d_20l}"
    declare -g color"${i}"_lighter_20="$c_hex_20l"
    c_rgb_12d_30l="$(( c_rgb_12d + "$((c_rgb_12d * 3 / 10))" ))"
    c_rgb_34d_30l="$(( c_rgb_34d + "$((c_rgb_34d * 3 / 10))" ))"
    c_rgb_56d_30l="$(( c_rgb_56d + "$((c_rgb_56d * 3 / 10))" ))"
    [[ "${c_rgb_12d_30l}" -ge 255 ]] && c_rgb_12d_30l=255
    [[ "${c_rgb_34d_30l}" -ge 255 ]] && c_rgb_34d_30l=255
    [[ "${c_rgb_56d_30l}" -ge 255 ]] && c_rgb_56d_30l=255
    printf -v c_hex_12d_30l '%x' "$c_rgb_12d_30l"
    printf -v c_hex_34d_30l '%x' "$c_rgb_34d_30l"
    printf -v c_hex_56d_30l '%x' "$c_rgb_56d_30l"
    [[ "${#c_hex_12d_30l}" -eq 1 ]] && c_hex_12d_30l="0${c_hex_12d_30l}"
    [[ "${#c_hex_34d_30l}" -eq 1 ]] && c_hex_34d_30l="0${c_hex_34d_30l}"
    [[ "${#c_hex_56d_30l}" -eq 1 ]] && c_hex_56d_30l="0${c_hex_56d_30l}"
    c_hex_30l="#${c_hex_12d_30l}${c_hex_34d_30l}${c_hex_56d_30l}"
    declare -g color"${i}"_lighter_30="$c_hex_30l"
    c_rgb_12d_40l="$(( c_rgb_12d + "$((c_rgb_12d * 2 / 5))" ))"
    c_rgb_34d_40l="$(( c_rgb_34d + "$((c_rgb_34d * 2 / 5))" ))"
    c_rgb_56d_40l="$(( c_rgb_56d + "$((c_rgb_56d * 2 / 5))" ))"
    [[ "${c_rgb_12d_40l}" -ge 255 ]] && c_rgb_12d_40l=255
    [[ "${c_rgb_34d_40l}" -ge 255 ]] && c_rgb_34d_40l=255
    [[ "${c_rgb_56d_40l}" -ge 255 ]] && c_rgb_56d_40l=255
    printf -v c_hex_12d_40l '%x' "$c_rgb_12d_40l"
    printf -v c_hex_34d_40l '%x' "$c_rgb_34d_40l"
    printf -v c_hex_56d_40l '%x' "$c_rgb_56d_40l"
    [[ "${#c_hex_12d_40l}" -eq 1 ]] && c_hex_12d_40l="0${c_hex_12d_40l}"
    [[ "${#c_hex_34d_40l}" -eq 1 ]] && c_hex_34d_40l="0${c_hex_34d_40l}"
    [[ "${#c_hex_56d_40l}" -eq 1 ]] && c_hex_56d_40l="0${c_hex_56d_40l}"
    c_hex_40l="#${c_hex_12d_40l}${c_hex_34d_40l}${c_hex_56d_40l}"
    declare -g color"${i}"_lighter_40="$c_hex_40l"
    c_rgb_12d_50l="$(( c_rgb_12d + "$((c_rgb_12d / 2))" ))"
    c_rgb_34d_50l="$(( c_rgb_34d + "$((c_rgb_34d / 2))" ))"
    c_rgb_56d_50l="$(( c_rgb_56d + "$((c_rgb_56d / 2))" ))"
    [[ "${c_rgb_12d_50l}" -ge 255 ]] && c_rgb_12d_50l=255
    [[ "${c_rgb_34d_50l}" -ge 255 ]] && c_rgb_34d_50l=255
    [[ "${c_rgb_56d_50l}" -ge 255 ]] && c_rgb_56d_50l=255
    printf -v c_hex_12d_50l '%x' "$c_rgb_12d_50l"
    printf -v c_hex_34d_50l '%x' "$c_rgb_34d_50l"
    printf -v c_hex_56d_50l '%x' "$c_rgb_56d_50l"
    [[ "${#c_hex_12d_50l}" -eq 1 ]] && c_hex_12d_50l="0${c_hex_12d_50l}"
    [[ "${#c_hex_34d_50l}" -eq 1 ]] && c_hex_34d_50l="0${c_hex_34d_50l}"
    [[ "${#c_hex_56d_50l}" -eq 1 ]] && c_hex_56d_50l="0${c_hex_56d_50l}"
    c_hex_50l="#${c_hex_12d_50l}${c_hex_34d_50l}${c_hex_56d_50l}"
    declare -g color"${i}"_lighter_50="$c_hex_50l"
    c_rgb_12d_60l="$(( c_rgb_12d + "$((c_rgb_12d * 3 / 5))" ))"
    c_rgb_34d_60l="$(( c_rgb_34d + "$((c_rgb_34d * 3 / 5))" ))"
    c_rgb_56d_60l="$(( c_rgb_56d + "$((c_rgb_56d * 3 / 5))" ))"
    [[ "${c_rgb_12d_60l}" -ge 255 ]] && c_rgb_12d_60l=255
    [[ "${c_rgb_34d_60l}" -ge 255 ]] && c_rgb_34d_60l=255
    [[ "${c_rgb_56d_60l}" -ge 255 ]] && c_rgb_56d_60l=255
    printf -v c_hex_12d_60l '%x' "$c_rgb_12d_60l"
    printf -v c_hex_34d_60l '%x' "$c_rgb_34d_60l"
    printf -v c_hex_56d_60l '%x' "$c_rgb_56d_60l"
    [[ "${#c_hex_12d_60l}" -eq 1 ]] && c_hex_12d_60l="0${c_hex_12d_60l}"
    [[ "${#c_hex_34d_60l}" -eq 1 ]] && c_hex_34d_60l="0${c_hex_34d_60l}"
    [[ "${#c_hex_56d_60l}" -eq 1 ]] && c_hex_56d_60l="0${c_hex_56d_60l}"
    c_hex_60l="#${c_hex_12d_60l}${c_hex_34d_60l}${c_hex_56d_60l}"
    declare -g color"${i}"_lighter_60="$c_hex_60l"
    c_rgb_12d_20d="$(( c_rgb_12d - "$((c_rgb_12d / 5))" ))"
    c_rgb_34d_20d="$(( c_rgb_34d - "$((c_rgb_34d / 5))" ))"
    c_rgb_56d_20d="$(( c_rgb_56d - "$((c_rgb_56d / 5))" ))"
    printf -v c_hex_12d_20d '%x' "$c_rgb_12d_20d"
    printf -v c_hex_34d_20d '%x' "$c_rgb_34d_20d"
    printf -v c_hex_56d_20d '%x' "$c_rgb_56d_20d"
    [[ "${#c_hex_12d_20d}" -eq 1 ]] && c_hex_12d_20d="0${c_hex_12d_20d}"
    [[ "${#c_hex_34d_20d}" -eq 1 ]] && c_hex_34d_20d="0${c_hex_34d_20d}"
    [[ "${#c_hex_56d_20d}" -eq 1 ]] && c_hex_56d_20d="0${c_hex_56d_20d}"
    c_hex_20d="#${c_hex_12d_20d}${c_hex_34d_20d}${c_hex_56d_20d}"
    declare -g color"${i}"_darker_20="$c_hex_20d"
    c_rgb_12d_30d="$(( c_rgb_12d - "$((c_rgb_12d * 3 / 10))" ))"
    c_rgb_34d_30d="$(( c_rgb_34d - "$((c_rgb_34d * 3 / 10))" ))"
    c_rgb_56d_30d="$(( c_rgb_56d - "$((c_rgb_56d * 3 / 10))" ))"
    printf -v c_hex_12d_30d '%x' "$c_rgb_12d_30d"
    printf -v c_hex_34d_30d '%x' "$c_rgb_34d_30d"
    printf -v c_hex_56d_30d '%x' "$c_rgb_56d_30d"
    [[ "${#c_hex_12d_30d}" -eq 1 ]] && c_hex_12d_30d="0${c_hex_12d_30d}"
    [[ "${#c_hex_34d_30d}" -eq 1 ]] && c_hex_34d_30d="0${c_hex_34d_30d}"
    [[ "${#c_hex_56d_30d}" -eq 1 ]] && c_hex_56d_30d="0${c_hex_56d_30d}"
    c_hex_30d="#${c_hex_12d_30d}${c_hex_34d_30d}${c_hex_56d_30d}"
    declare -g color"${i}"_darker_30="$c_hex_30d"
    c_rgb_12d_40d="$(( c_rgb_12d - "$((c_rgb_12d * 2 / 5))" ))"
    c_rgb_34d_40d="$(( c_rgb_34d - "$((c_rgb_34d * 2 / 5))" ))"
    c_rgb_56d_40d="$(( c_rgb_56d - "$((c_rgb_56d * 2 / 5))" ))"
    printf -v c_hex_12d_40d '%x' "$c_rgb_12d_40d"
    printf -v c_hex_34d_40d '%x' "$c_rgb_34d_40d"
    printf -v c_hex_56d_40d '%x' "$c_rgb_56d_40d"
    [[ "${#c_hex_12d_40d}" -eq 1 ]] && c_hex_12d_40d="0${c_hex_12d_40d}"
    [[ "${#c_hex_34d_40d}" -eq 1 ]] && c_hex_34d_40d="0${c_hex_34d_40d}"
    [[ "${#c_hex_56d_40d}" -eq 1 ]] && c_hex_56d_40d="0${c_hex_56d_40d}"
    c_hex_40d="#${c_hex_12d_40d}${c_hex_34d_40d}${c_hex_56d_40d}"
    declare -g color"${i}"_darker_40="$c_hex_40d"
    c_rgb_12d_50d="$(( c_rgb_12d - "$((c_rgb_12d / 2))" ))"
    c_rgb_34d_50d="$(( c_rgb_34d - "$((c_rgb_34d / 2))" ))"
    c_rgb_56d_50d="$(( c_rgb_56d - "$((c_rgb_56d / 2))" ))"
    printf -v c_hex_12d_50d '%x' "$c_rgb_12d_50d"
    printf -v c_hex_34d_50d '%x' "$c_rgb_34d_50d"
    printf -v c_hex_56d_50d '%x' "$c_rgb_56d_50d"
    [[ "${#c_hex_12d_50d}" -eq 1 ]] && c_hex_12d_50d="0${c_hex_12d_50d}"
    [[ "${#c_hex_34d_50d}" -eq 1 ]] && c_hex_34d_50d="0${c_hex_34d_50d}"
    [[ "${#c_hex_56d_50d}" -eq 1 ]] && c_hex_56d_50d="0${c_hex_56d_50d}"
    c_hex_50d="#${c_hex_12d_50d}${c_hex_34d_50d}${c_hex_56d_50d}"
    declare -g color"${i}"_darker_50="$c_hex_50d"
    c_rgb_12d_60d="$(( c_rgb_12d - "$((c_rgb_12d * 3 / 5))" ))"
    c_rgb_34d_60d="$(( c_rgb_34d - "$((c_rgb_34d * 3 / 5))" ))"
    c_rgb_56d_60d="$(( c_rgb_56d - "$((c_rgb_56d * 3 / 5))" ))"
    printf -v c_hex_12d_60d '%x' "$c_rgb_12d_60d"
    printf -v c_hex_34d_60d '%x' "$c_rgb_34d_60d"
    printf -v c_hex_56d_60d '%x' "$c_rgb_56d_60d"
    [[ "${#c_hex_12d_60d}" -eq 1 ]] && c_hex_12d_60d="0${c_hex_12d_60d}"
    [[ "${#c_hex_34d_60d}" -eq 1 ]] && c_hex_34d_60d="0${c_hex_34d_60d}"
    [[ "${#c_hex_56d_60d}" -eq 1 ]] && c_hex_56d_60d="0${c_hex_56d_60d}"
    c_hex_60d="#${c_hex_12d_60d}${c_hex_34d_60d}${c_hex_56d_60d}"
    declare -g color"${i}"_darker_60="$c_hex_60d"
  done
}

# Create colors.tdesktop-palette using the colors generated by create_colors()
# and the colors.wal-constants file.
create_palette() {
  cat <<EOF > "${pre}/colors.tdesktop-palette"
// Colors imported from wal by init.sh.
color0: $color0;
color1: $color1;
color2: $color2;
color3: $color3;
color4: $color4;
color5: $color5;
color6: $color6;
color7: $color7;
color8: $color8;

// Lighter and darker variants of wal's colors.
colorLighter0_20: $color0_lighter_20;
colorLighter0_30: $color0_lighter_30;
colorLighter0_40: $color0_lighter_40;
colorLighter0_50: $color0_lighter_50;
colorLighter0_60: $color0_lighter_60;
colorDarker0_20: $color0_darker_20;
colorDarker0_30: $color0_darker_30;
colorDarker0_40: $color0_darker_40;
colorDarker0_50: $color0_darker_50;
colorDarker0_60: $color0_darker_60;
colorLighter1_20: $color1_lighter_20;
colorLighter1_30: $color1_lighter_30;
colorLighter1_40: $color1_lighter_40;
colorLighter1_50: $color1_lighter_50;
colorLighter1_60: $color1_lighter_60;
colorDarker1_20: $color1_darker_20;
colorDarker1_30: $color1_darker_30;
colorDarker1_40: $color1_darker_40;
colorDarker1_50: $color1_darker_50;
colorDarker1_60: $color1_darker_60;
colorLighter2_20: $color2_lighter_20;
colorLighter2_30: $color2_lighter_30;
colorLighter2_40: $color2_lighter_40;
colorLighter2_50: $color2_lighter_50;
colorLighter2_60: $color2_lighter_60;
colorDarker2_20: $color2_darker_20;
colorDarker2_30: $color2_darker_30;
colorDarker2_40: $color2_darker_40;
colorDarker2_50: $color2_darker_50;
colorDarker2_60: $color2_darker_60;
colorLighter7_20: $color7_lighter_20;
colorLighter7_30: $color7_lighter_30;
colorLighter7_40: $color7_lighter_40;
colorLighter7_50: $color7_lighter_50;
colorLighter7_60: $color7_lighter_60;
colorDarker7_20: $color7_darker_20;
colorDarker7_30: $color7_darker_30;
colorDarker7_40: $color7_darker_40;
colorDarker7_50: $color7_darker_50;
colorDarker7_60: $color7_darker_60;

// Alpha colors.
colorAlpha0_18: ${color0}18;
colorAlpha0_3c: ${color0}3c;
colorAlpha0_03: ${color0}03;
colorAlpha0_7f: ${color0}7f;
colorAlpha0_b0: ${color0}b0;
colorAlpha0_cc: ${color0}cc;
colorAlpha0_00: ${color0}00;
colorAlpha0_54: ${color0}54;
colorAlpha0_56: ${color0}56;
colorAlpha0_74: ${color0}74;
colorAlpha0_40: ${color0}40;
colorAlpha0_4c: ${color0}4c;
colorAlpha0_b2: ${color0}b2;
colorAlpha0_40: ${color0}40;
colorAlpha1_10: ${color1}10;
colorAlpha1_33: ${color1}33;
colorAlpha2_c8: ${color2}c8;
colorAlpha2_4c: ${color2}4c;
colorAlpha2_7f: ${color2}7f;
colorAlpha2_00: ${color2}00;
colorAlpha2_87: ${color2}87;
colorAlpha3_64: ${color3}64;
colorAlpha7_53: ${color7}53;
colorAlpha7_7a: ${color7}7a;
colorAlpha7_1a: ${color7}1a;
colorAlpha7_2c: ${color7}2c;
colorAlpha7_7f: ${color7}7f;
colorAlpha7_bc: ${color7}bc;
colorAlpha7_4c: ${color7}4c;
colorAlpha7_6b: ${color7}6b;
colorAlpha7_14: ${color7}14;
EOF
  const="$(<".local/usr/wal-telegram/colors.wal-constants")"
  printf '%s' "$const" >> "${pre}/colors.tdesktop-palette"
}

main() {
  prepare
  create_colors
  create_palette
  printf '%s\n' "Theme created succesfully."
}

main