#!/usr/bin/env bash

# Bash 4.0+ only. Faster than using tr or awk + no fork.
toLower() {
    if [[ $# -eq 0 ]]; then
        while IFS= read -r line; do
            echo "${line,,}"
        done
    else
        local str="$*"
        echo "${str,,}"
    fi
}

# Return a string corresponding to the current OS.
which_os() {
    case "$OSTYPE" in
    darwin*)
        printf "darwin"
        ;;
    linux*)
        if [[ -f /etc/os-release ]]; then
            # shellcheck disable=SC1091
            source /etc/os-release
            printf "%s" "${ID,,}"
        else
            printf "linux"
        fi
        ;;
    esac
}

# Choose a Charm repo name with Gum.
pickCharmRepo() {
    getCharmRepos | gum filter --height=10 --header "$1"
}

# Interactively choose a Charm repo.
charm_clone() {
    local repo
    repo="$(pickCharmRepo "Clone which Charm™ repo?")"
    if [[ -z "$repo" ]]; then
        printf "Okay, never mind.\n"
        return 1
    fi
    git clone "git@github.com:charmbracelet/$repo" "$HOME/src/$repo"
}

# Interactively use "go get" against a Charm repo.
go_get_charm() {
    local repo
    repo="$(pickCharmRepo "Which Charm™ repo do you want to ‘go get?’")"
    if [[ -z "$repo" ]]; then
        printf "Okay, never mind.\n"
        return 1
    fi
    go get "github.com/charmbracelet/$repo"
}

# Returns the number of CPU cores available on the system.
num_cores() {
    nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo "Could not determine core count"
}

# Return 1 if a given command exists, and 0 if not.
command_exists() {
    if command -v "$1" &>/dev/null; then
        printf 1
        return
    fi
    printf 0
}

# Return the preferred diff tool for the given OS.
gitdiff() {
    if [[ $(which_os) == darwin ]]; then
        opendiff
    else
        vimdiff
    fi
}

#shellcheck disable=1090
decryptAndSource() {
    source <(gpg --decrypt "$1" 2>/dev/null)
}

# Print the names of all public and private Charm repos.
getCharmRepos() {
    getRepos() {
        gh repo list charmbracelet --visibility="$1" --json name
    }

    getAllRepos() {
        printf '%s %s' "$(getRepos "public")" "$(getRepos "private")" | jq -s 'add'
    }

    getAllRepos |
        jq .[].name |
        tr -d '"' |
        sort
}