# Bash integration for TUI.
# This file is sourced automatically by the installer from ~/.bashrc.
# Actions are executed by this Bash process, not by a child shell in Python.

tui() {
    local tui_python
    tui_python="${TUI_PYTHON:-$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/tui.py}"

    if [[ ! -f "$tui_python" ]]; then
        echo "tui: cannot find $tui_python" >&2
        return 127
    fi

    local tui_dir="."
    local show_all=0
    local arg
    for arg in "$@"; do
        case "$arg" in
            -a|--all) show_all=1 ;;
            -v|--version) python3 "$tui_python" --version; return $? ;;
            *) tui_dir="$arg" ;;
        esac
    done
    local command_file
    local cwd_file
    local all_file
    local rc
    local cmd
    local tui_cwd
    local tui_all
    local -a tui_commands

    command_file="$(mktemp)"
    cwd_file="$(mktemp)"
    all_file="$(mktemp)"
    printf '%s\n' "$show_all" > "$all_file"

    while :; do
        : > "$command_file"
        : > "$cwd_file"
        : > "$all_file"

        if (( show_all )); then
            TUI_COMMAND_FILE="$command_file" \
            TUI_CWD_FILE="$cwd_file" \
            TUI_ALL_FILE="$all_file" \
                python3 "$tui_python" -a "$tui_dir"
        else
            TUI_COMMAND_FILE="$command_file" \
            TUI_CWD_FILE="$cwd_file" \
            TUI_ALL_FILE="$all_file" \
                python3 "$tui_python" "$tui_dir"
        fi
        rc=$?

        tui_cwd="$(<"$cwd_file")"
        tui_all="$(<"$all_file")"
        if [[ "$tui_all" == "1" ]]; then
            show_all=1
        elif [[ "$tui_all" == "0" ]]; then
            show_all=0
        fi

        # Ctrl+C exits TUI. Apply the last directory in the parent Bash
        # process, then return to the caller.
        if (( rc == 43 )); then
            if [[ -n "$tui_cwd" && -d "$tui_cwd" ]]; then
                cd -- "$tui_cwd" || {
                    rm -f "$command_file" "$cwd_file" "$all_file"
                    return 1
                }
            fi
            rm -f "$command_file" "$cwd_file" "$all_file"
            return 0
        fi

        if (( rc != 42 )); then
            rm -f "$command_file" "$cwd_file" "$all_file"
            return "$rc"
        fi

        if [[ -z "$tui_cwd" || ! -d "$tui_cwd" ]]; then
            echo "tui: invalid TUI working directory" >&2
            rm -f "$command_file" "$cwd_file" "$all_file"
            return 1
        fi

        # Execute all commands belonging to one TUI action before starting
        # TUI again. Each command remains a normal Bash command and gets its
        # own history entry. If a command fails, stop the action and pause so
        # the user has time to see the error.
        pushd "$tui_cwd" >/dev/null || {
            rm -f "$command_file" "$cwd_file" "$all_file"
            return 1
        }

        mapfile -t tui_commands < "$command_file"
        for cmd in "${tui_commands[@]}"; do
            [[ -z "$cmd" ]] && continue

            history -s -- "$cmd"
            eval "$cmd"
            rc=$?

            if (( rc != 0 )); then
                printf '\nTUI: command failed (exit %d)\n' "$rc" >&2
                read -rp 'Tryck Enter för att fortsätta...' _
                break
            fi
        done

        popd >/dev/null || true

        # Re-enter TUI at the directory in which the action was created.
        tui_dir="$tui_cwd"
    done
}