# Copyright (C) 2026 Rootiest
# SPDX-License-Identifier: AGPL-3.0-or-later

# SYNOPSIS
#   kitty-logging [install | uninstall | status | dismiss] [-h]
#
# DESCRIPTION
#   Manages the fish-config Kitty scrollback watcher. `install` copies the
#   canonical watcher into the Kitty config dir and wires it into kitty.conf via
#   a sentinel-marked managed block (commenting out any conflicting active
#   watcher line to avoid double-capture). `uninstall` reverses it. `status`
#   reports wiring, watcher version, and C5 logging state. `dismiss` silences the
#   per-session setup reminder. Runtime capture remains gated by the C5
#   .logging_disabled sentinel; install affects future Kitty instances only.
#
# ARGUMENTS
#   install    Copy the watcher and add the managed block to kitty.conf
#   uninstall  Remove the managed block and the installed watcher
#   status     Report wiring, watcher version, and C5 logging state
#   dismiss    Stop the per-session reminder
#   -h, --help Show this help
#
# RETURNS
#   0  Success
#   1  Unknown subcommand/flag, kitty missing, or a write failure
#
# EXAMPLE
#   kitty-logging install
#   kitty-logging status
function kitty-logging --description 'Install/manage the fish-config Kitty scrollback watcher'
    set -l c_head (set_color --bold cyan)
    set -l c_cmd (set_color --bold white)
    set -l c_flag (set_color yellow)
    set -l c_ok (set_color green)
    set -l c_warn (set_color yellow)
    set -l c_err (set_color red)
    set -l c_dim (set_color brblack)
    set -l c_reset (set_color normal)

    set -l cmd $argv[1]

    if test -z "$cmd"; or contains -- "$cmd" -h --help
        echo "$c_head""Usage:$c_reset $c_cmd""kitty-logging$c_reset $c_flag""[install|uninstall|status|dismiss]$c_reset $c_flag""[-h]$c_reset"
        echo
        echo "  Manage the fish-config Kitty scrollback watcher (C5 logging)."
        echo
        echo "$c_head""Commands:$c_reset"
        echo "  $c_flag""install$c_reset    Copy the watcher and wire it into kitty.conf"
        echo "  $c_flag""uninstall$c_reset  Remove the managed block and the watcher file"
        echo "  $c_flag""status$c_reset     Show wiring, watcher version, and C5 state"
        echo "  $c_flag""dismiss$c_reset    Stop the per-session reminder"
        echo "  $c_flag""-h$c_reset, $c_flag""--help$c_reset  Show this help message"
        return 0
    end

    # dismiss only sets a universal variable — it must work even where kitty is
    # absent (e.g. shared dotfiles on a non-kitty machine), so handle it before
    # the kitty guard.
    if test "$cmd" = dismiss
        set -U __fish_config_kitty_watcher_dismissed 1
        echo "$c_ok""→ Reminder dismissed.$c_reset Run $c_cmd""kitty-logging install$c_reset anytime to enable."
        return 0
    end

    if not type -q kitty
        echo "$c_err""kitty-logging: kitty is not installed$c_reset" >&2
        return 1
    end

    set -l kitty_dir (__kitty_logging_dir)
    set -l conf "$kitty_dir/kitty.conf"
    set -l src "$__fish_config_dir/kitty/fish-config-watcher.py"
    set -l dst "$kitty_dir/fish-config-watcher.py"
    set -l blk_begin "# >>> fish-config logging (managed — do not edit) >>>"
    set -l blk_end "# <<< fish-config logging (managed) <<<"

    switch $cmd
        case status
            echo "$c_head""Kitty logging status$c_reset"
            echo "  Config dir:    $kitty_dir"
            if test -f $conf; and command grep -qF -- "$blk_begin" $conf
                echo "  Managed block: $c_ok""present$c_reset"
            else if __kitty_logging_has_watcher
                echo "  Managed block: $c_warn""absent$c_reset (a non-managed watcher line is present)"
            else
                echo "  Managed block: $c_warn""absent$c_reset"
            end
            if test -f $dst
                echo "  Watcher file:  $c_ok""installed$c_reset (version "(__kitty_logging_version $dst)")"
            else
                echo "  Watcher file:  $c_warn""not installed$c_reset"
            end
            if __fish_config_op_enabled __fish_config_op_logging
                echo "  C5 logging:    $c_ok""enabled$c_reset"
            else
                echo "  C5 logging:    $c_warn""disabled$c_reset (capture is currently inert)"
            end
            return 0

        case install
            if not test -f $src
                echo "$c_err""kitty-logging: watcher source not found at $src$c_reset" >&2
                return 1
            end
            if not command mkdir -p $kitty_dir
                echo "$c_err""kitty-logging: cannot create $kitty_dir$c_reset" >&2
                return 1
            end

            # Copy/refresh the watcher when missing or stale. A failed copy must
            # abort: otherwise we would wire a managed block pointing at a watcher
            # file that does not exist and report success.
            set -l copied 0
            if not test -f $dst; or test (__kitty_logging_version $src) -gt (__kitty_logging_version $dst)
                if not command cp $src $dst
                    echo "$c_err""kitty-logging: failed to copy watcher to $dst$c_reset" >&2
                    return 1
                end
                set copied 1
            end

            # Already wired: idempotent no-op (watcher may still have refreshed).
            if test -f $conf; and command grep -qF -- "$blk_begin" $conf
                if test $copied -eq 1
                    echo "$c_ok""→ Watcher updated.$c_reset Already wired in $conf."
                else
                    echo "$c_ok""→ Already installed.$c_reset"
                end
                return 0
            end

            # Comment any active (non-managed) watcher line to avoid double-capture.
            if __kitty_logging_has_watcher
                command sed -i 's/^\([[:space:]]*\)\(watcher[[:space:]].*\)$/\1# disabled by fish-config: \2/' $conf
                echo "$c_warn""→ Commented an existing watcher line in kitty.conf to avoid double-capture.$c_reset"
            end

            # Append the managed block.
            if not printf '%s\n' "" "$blk_begin" "watcher fish-config-watcher.py" "$blk_end" >>$conf
                echo "$c_err""kitty-logging: failed to write $conf$c_reset" >&2
                return 1
            end
            echo "$c_ok""→ Installed.$c_reset Watcher wired into $conf"
            echo "  $c_dim""Restart Kitty (new windows) for it to take effect.$c_reset"
            if not __fish_config_op_enabled __fish_config_op_logging
                echo "  $c_warn""Note: C5 logging is disabled, so capture is currently inert.$c_reset"
            end
            return 0

        case uninstall
            # Require both markers before the range-delete: a sed range with a
            # missing end marker would delete from the begin marker to EOF.
            if test -f $conf; and command grep -qF -- "$blk_begin" $conf; and command grep -qF -- "$blk_end" $conf
                command sed -i '/^# >>> fish-config logging/,/^# <<< fish-config logging/d' $conf
                echo "$c_ok""→ Removed managed block from $conf$c_reset"
            else if test -f $conf; and command grep -qF -- "$blk_begin" $conf
                echo "$c_warn""→ Managed block in $conf looks malformed (missing end marker); left it untouched.$c_reset" >&2
            else
                echo "$c_dim""→ No managed block found in $conf$c_reset"
            end
            if test -f $dst
                command rm -f $dst
                echo "$c_ok""→ Removed $dst$c_reset"
            end
            return 0

        case '*'
            echo "$c_err""kitty-logging: unknown command '$cmd'$c_reset" >&2
            echo "Run $c_cmd""kitty-logging --help$c_reset for usage." >&2
            return 1
    end
end