#!/usr/bin/env fish
# Fish highlighting torture test 🐟

# === Variables ===
set normal_var "hello"
set -l local_var 123
set -gx GLOBAL_VAR "world"
set PATH $PATH /usr/local/bin
set --erase OLD_VAR

# Builtin variables
echo $HOME $PWD $USER $FISH_VERSION

# === Strings ===
set single 'single quoted string'
set double "double quoted $normal_var"
set escaped "newline\n tab\t dollar\$"

# === Conditionals ===
if test $normal_var = "hello"
    echo "equal"
else if test $normal_var != "world"
    echo "not equal"
end

# === Logical operators ===
true and echo "yes"
false or echo "fallback"
not false

# === Arithmetic ===
set x 10
set y 20
math "$x + $y"
if test (math "$x * 2") -gt 15
    echo "math works"
end

# === Loops ===
for i in 1 2 3
    echo "loop $i"
end

while test $x -gt 0
    set x (math "$x - 1")
end

# === Functions ===
function greet --argument name
    echo "Hello $name"
end

greet "world"

# === Command substitution ===
set files (ls | grep ".fish")

# === Redirections ===
echo "output" > /tmp/fish_test.txt
cat < /tmp/fish_test.txt >> /tmp/fish_log.txt

# === Process substitution ===
diff (ls /bin) (ls /usr/bin)

# === Case statement ===
switch $argv[1]
    case start
        echo "Starting"
    case stop
        echo "Stopping"
    case '*'
        echo "Unknown"
end

# === Subshell ===
begin
    echo "inside begin/end"
end

# === Comments & operators ===
# && || | & ! should all highlight
true && echo "ok" || echo "fail"

# === Regex ===
string match -r '^[a-z]+$' "hello"

# === Test builtin ===
test -f /etc/passwd
test ! -d /does/not/exist

# === Exit ===
exit 0