#!/usr/bin/env bash
set -u

LOCATION="Norrkoping"
URL="https://wttr.in/${LOCATION}?format=%t|%C"

json_escape() {
    local s="$1"
    s=${s//\\/\\\\}
    s=${s//\"/\\\"}
    s=${s//$'\n'/\\n}
    printf '%s' "$s"
}

markup_escape() {
    local s="$1"
    s=${s//&/&}
    s=${s//</&lt;}
    s=${s//>/&gt;}
    printf '%s' "$s"
}

icon_markup() {
    local icon="$1"
    local color="$2"
    printf '<span font_desc="SauceCodePro Nerd Font 15" foreground="%s">%s</span>' "$color" "$icon"
}

icon_for_condition() {
    local c
    c=$(printf '%s' "$1" | tr '[:upper:]' '[:lower:]')

    case "$c" in
        *thunder*|*storm*)
            printf '󰖓'
            ;;
        *snow*|*sleet*|*blizzard*|*ice*)
            printf '󰼶'
            ;;
        *rain*|*drizzle*|*shower*)
            printf '󰖗'
            ;;
        *fog*|*mist*|*haze*|*smoke*)
            printf '󰖑'
            ;;
        *partly*)
            printf '󰖕'
            ;;
        *clear*|*sunny*)
            printf '󰖙'
            ;;
        *cloud*|*overcast*)
            printf '󰖐'
            ;;
        *)
            printf '󰖐'
            ;;
    esac
}

if ! command -v curl >/dev/null 2>&1; then
    text="<span foreground=\"#EBCB8B\">--°C Unavailable</span> $(icon_markup "󰖐" "#D08770")"
    printf '{"text":"%s","tooltip":"curl is required for weather","class":"weather-unavailable"}\n' "$(json_escape "$text")"
    exit 0
fi

raw=$(curl -fsS --max-time 6 "$URL" 2>/dev/null || true)
if [[ -z "$raw" || "$raw" != *"|"* ]]; then
    text="<span foreground=\"#EBCB8B\">--°C Unavailable</span> $(icon_markup "󰖐" "#D08770")"
    printf '{"text":"%s","tooltip":"Weather unavailable for Norrkoping","class":"weather-unavailable"}\n' "$(json_escape "$text")"
    exit 0
fi

temp=${raw%%|*}
condition=${raw#*|}
icon=$(icon_for_condition "$condition")
updated=$(date '+%H:%M')
text="<span foreground=\"#D8DEE9\">$(markup_escape "$temp $condition")</span> $(icon_markup "$icon" "#88C0D0")"
tooltip=$(cat <<EOF
Norrkoping, Sweden
$temp - $condition
Updated: $updated
EOF
)

printf '{"text":"%s","tooltip":"%s","class":"weather"}\n' \
    "$(json_escape "$text")" \
    "$(json_escape "$tooltip")"