#!/usr/bin/env fish
# Install the J621 fish greeting:
#   * copies fish_greeting.fish into ~/.config/fish/functions/
#   * writes ~/.config/j621Greeting/config.fish (asks for the API origin and an
#     optional token, or takes them as flags)
#   * checks the tools it needs and probes the configured backend
#
# Usage:
#   fish install.fish
#   fish install.fish --url https://j621.example.ts.net --token <api-token>
#   fish install.fish --no-prompt          # never ask, keep/derive defaults
#   fish install.fish --force              # rewrite an existing config

argparse 'url=' 'token=' 'no-prompt' 'force' 'help' -- $argv
or begin
    echo "Try: fish install.fish --help"
    exit 1
end

if set -q _flag_help
    sed -n '2,12p' (status --current-filename) | sed 's/^# \{0,1\}//'
    exit 0
end

set -l here (path resolve (dirname (status --current-filename)))
set -l functions_dir ~/.config/fish/functions
set -l config_dir ~/.config/j621Greeting
set -l config_file $config_dir/config.fish
set -l default_url https://j621.rainbow-herring.ts.net
set -l url $default_url
set -l token ""
set -l problems 0

if set -q _flag_url
    set url $_flag_url
end
if set -q _flag_token
    set token $_flag_token
end

# --- Install the function -----------------------------------------------------
mkdir -p $functions_dir
cp "$here/fish_greeting.fish" "$functions_dir/fish_greeting.fish"
echo "Installed $functions_dir/fish_greeting.fish"

# --- Configuration ------------------------------------------------------------
mkdir -p $config_dir

set -l write_config 0
if not test -f $config_file
    set write_config 1
else if set -q _flag_force; or set -q _flag_url
    set write_config 1
else
    echo "Keeping existing $config_file (use --force to rewrite it)"
    # Read the current origin back so the probe below uses it.
    set -l current (grep -E '^set -g J621_BASE ' $config_file 2>/dev/null | head -1 | string replace -r '^set -g J621_BASE +' '')
    test -n "$current"; and set url $current
end

if test $write_config -eq 1
    if not set -q _flag_no_prompt
        if not set -q _flag_url
            read -P "API origin [$default_url]: " answer
            test -n "$answer"; and set url $answer
        end
        if not set -q _flag_token
            read -P "API token (optional, Enter to run as a guest): " answer
            test -n "$answer"; and set token $answer
        end
    end

    set url (string trim --right --chars=/ "$url")
    printf '# Written by install.fish on %s\n' (date '+%Y-%m-%d') > $config_file
    printf 'set -g J621_BASE %s\n' "$url" >> $config_file
    if test -n "$token"
        printf 'set -g J621_TOKEN %s\n' "$token" >> $config_file
    else
        printf '# set -g J621_TOKEN paste-a-token-here\n' >> $config_file
    end
    printf '# set -g J621_WEB %s\n' "$url" >> $config_file
    printf '# set -g J621_FASTFETCH_CONFIG jake\n' >> $config_file
    chmod 600 $config_file
    echo "Wrote $config_file"
end

# --- Dependencies -------------------------------------------------------------
for tool in fastfetch file
    if not command -v $tool >/dev/null 2>&1
        set problems 1
        echo "Missing required tool: $tool"
    end
end
if not command -v curl >/dev/null 2>&1; and not command -v wget >/dev/null 2>&1
    set problems 1
    echo "Missing required tool: curl (or wget)"
end
for tool in gifsicle jq python3
    if not command -v $tool >/dev/null 2>&1
        echo "Optional tool not found: $tool (the greeting still works)"
    end
end

# --- Probe the configured backend --------------------------------------------
echo
echo "Checking $url ..."
set -l health ""
if command -v curl >/dev/null 2>&1
    set health (curl -s -m 10 "$url/health" | string collect)
else
    set health (wget -qO- -T 10 "$url/health" | string collect)
end

if string match -q '*"status":"ok"*' "$health"
    echo "  backend: ok"
    set -l random_args -s -m 10
    if test -n "$token"
        set -a random_args -H "Authorization: Token $token"
    end
    set -l probe ""
    if command -v curl >/dev/null 2>&1
        set probe (curl $random_args "$url/api/random/?fastfetch=1" | string collect)
    else
        set probe (wget -qO- -T 10 "$url/api/random/?fastfetch=1" | string collect)
    end
    set -l detail (printf '%s' "$probe" | grep -o '"detail"[[:space:]]*:[[:space:]]*"[^"]*"' | head -1 | sed -E 's/.*:[[:space:]]*"//; s/"$//')
    if test -n "$detail"
        echo "  random: $detail"
        if test -z "$token"
            echo "  (a token would also let you see items that are hidden from guests)"
        end
    else
        echo "  random: ok"
    end
else
    set problems 1
    echo "  backend did not answer at $url/health"
    echo "  got: $health"
    echo "  Fix J621_BASE in $config_file (or pass --url) and run again."
end

# --- Wrap up ------------------------------------------------------------------
echo
if test $problems -eq 0
    echo "Done. Test it now with:  fish_greeting"
else
    echo "Finished with problems above; the greeting will report them too."
end
echo "Rating mode lives in ~/.config/fish/greeting_mode (0=NSFW, 1=SFW, 2=Questionable)."
echo "The old gm-switch tool / .desktop launchers keep working — same file."

exit $problems