#!/usr/bin/env sh
set -e

usage() {
    echo "Usage: $0 [--shell fish|bash|none|all] [--no-man]"
}

requested_shell=
install_man=true

while [ "$#" -gt 0 ]; do
    case "$1" in
        --shell)
            requested_shell=${2:-}
            shift 2
            ;;
        --shell=*)
            requested_shell=${1#--shell=}
            shift
            ;;
        --no-man)
            install_man=false
            shift
            ;;
        -h|--help)
            usage
            exit 0
            ;;
        *)
            echo "Unknown option: $1" >&2
            usage >&2
            exit 1
            ;;
    esac
done

cabal build exe:tasker

bin=$(cabal list-bin exe:tasker)

sudo install -Dm755 "$bin" /usr/local/bin/tasker
echo "Installed $bin -> /usr/local/bin/tasker"

detect_shell() {
    if [ -n "$requested_shell" ]; then
        echo "$requested_shell"
    else
        basename "${SHELL:-}"
    fi
}

install_fish_completion() {
    if [ -f tasker.fish ]; then
        sudo install -Dm644 tasker.fish \
            /usr/share/fish/vendor_completions.d/tasker.fish
        echo "Installed tasker.fish -> /usr/share/fish/vendor_completions.d/tasker.fish"
    else
        echo "Skipped fish completion: tasker.fish not found"
    fi
}

install_bash_completion() {
    if [ -f tasker.bash ]; then
        sudo install -Dm644 tasker.bash \
            /usr/share/bash-completion/completions/tasker
        echo "Installed tasker.bash -> /usr/share/bash-completion/completions/tasker"
    else
        echo "Skipped bash completion: tasker.bash not found"
    fi
}

install_manpage() {
    if [ -f tasker.1 ]; then
        sudo install -Dm644 tasker.1 \
            /usr/local/share/man/man1/tasker.1
        sudo mandb 2>/dev/null || true
        echo "Installed tasker.1 -> /usr/local/share/man/man1/tasker.1"
    else
        echo "Skipped manpage: tasker.1 not found"
    fi
}

case "$(detect_shell)" in
    fish)
        install_fish_completion
        ;;
    bash)
        install_bash_completion
        ;;
    all)
        install_fish_completion
        install_bash_completion
        ;;
    none)
        echo "Skipped shell completions"
        ;;
    *)
        echo "Unsupported shell: ${requested_shell:-${SHELL:-unset}}"
        echo "Skipped shell completions"
        ;;
esac

if [ "$install_man" = true ]; then
    install_manpage
fi