#!/usr/bin/env bash
#
# isi-music: Linux install script
#
# Downloads the latest binary from GitHub Releases, installs audio
# dependencies, and launches the setup wizard.
#
# Usage:
#   curl -fsSL https://raw.githubusercontent.com/glrmrissi/isi_music/master/scripts/install.sh | bash
#
set -euo pipefail

REPO="glrmrissi/isi_music"
BINARY_NAME="isi-music"
INSTALL_DIR="/usr/local/bin"

# Colors
RED='\033[1;31m'
GREEN='\033[1;32m'
YELLOW='\033[1;33m'
CYAN='\033[1;36m'
BOLD='\033[1m'
RESET='\033[0m'

ok()    { echo -e "  ${GREEN}[OK]${RESET}  $*"; }
warn()  { echo -e "  ${YELLOW}[WARN]${RESET}  $*"; }
fail()  { echo -e "  ${RED}[FAIL]${RESET}  $*"; }
info()  { echo -e "  ${CYAN}[..]${RESET}  $*"; }

# Helpers
command_exists() { command -v "$1" >/dev/null 2>&1; }

detect_distro() {
    if [[ -f /etc/debian_version ]]; then
        echo "debian"
    elif [[ -f /etc/arch-release ]]; then
        echo "arch"
    elif [[ -f /etc/fedora_release ]] || [[ -f /etc/redhat-release ]]; then
        echo "fedora"
    else
        echo "unknown"
    fi
}

# Banner
echo ""
echo -e "  ${BOLD}${GREEN}isi-music${RESET} ${BOLD}- Linux Installer${RESET}"
echo -e "  $(printf '-%.0s' {1..50})"
echo ""

# Step 1: Audio dependencies
echo -e "  ${BOLD}Step 1/3: Audio dependencies${RESET}"
echo ""

DISTRO=$(detect_distro)
case "$DISTRO" in
    debian)
        info "Detected Debian/Ubuntu: installing libasound2, libpulse0…"
        sudo apt-get update -qq
        sudo apt-get install -y -qq libasound2t64 libpulse0 2>/dev/null || \
        sudo apt-get install -y -qq libasound2 libpulse0
        ok "Audio dependencies installed"
        ;;
    arch)
        info "Detected Arch Linux: installing alsa-lib, libpulse…"
        sudo pacman -S --noconfirm --needed alsa-lib libpulse
        ok "Audio dependencies installed"
        ;;
    fedora)
        info "Detected Fedora: installing alsa-lib, pulseaudio-libs…"
        sudo dnf install -y alsa-lib pulseaudio-libs
        ok "Audio dependencies installed"
        ;;
    *)
        warn "Could not detect distribution. Please install ALSA + PulseAudio manually:"
        warn "  Debian/Ubuntu: sudo apt install libasound2 libpulse0"
        warn "  Arch:          sudo pacman -S alsa-lib libpulse"
        warn "  Fedora:        sudo dnf install alsa-lib pulseaudio-libs"
        ;;
esac
echo ""

# Step 2: Download binary
echo -e "  ${BOLD}Step 2/3: Download isi-music${RESET}"
echo ""

if command_exists "$BINARY_NAME" && [[ "${1:-}" != "--force" ]]; then
    warn "isi-music is already installed at: $(command -v $BINARY_NAME)"
    reinstall=""
    read -rp "  Reinstall? (y/N) " reinstall || true
    if [[ ! "$reinstall" =~ ^[Yy] ]]; then
        ok "Keeping existing installation"
        echo ""
        SKIP_DOWNLOAD=1
    fi
fi

if [[ -z "${SKIP_DOWNLOAD:-}" ]]; then
    DOWNLOAD_URL="https://github.com/${REPO}/releases/latest/download/isi-music-linux-x86_64"
    TMP_FILE="/tmp/${BINARY_NAME}-download"

    info "Downloading latest release from GitHub…"
    if curl -fSL "$DOWNLOAD_URL" -o "$TMP_FILE"; then
        chmod +x "$TMP_FILE"
        info "Installing to ${INSTALL_DIR}/${BINARY_NAME}…"
        sudo mv "$TMP_FILE" "${INSTALL_DIR}/${BINARY_NAME}"
        ok "isi-music installed to ${INSTALL_DIR}/${BINARY_NAME}"
    else
        fail "Could not download binary. Check your internet connection or visit:"
        fail "  https://github.com/${REPO}/releases"
        exit 1
    fi
fi
echo ""

# Step 2b: Install desktop icon + .desktop file (Linux)
if [[ -z "${SKIP_DOWNLOAD:-}" ]]; then
    ICON_BASE="${HOME}/.local/share/icons/hicolor"
    APPS_DIR="${HOME}/.local/share/applications"

    info "Installing desktop icon and launcher…"

    # Download icon files from the repo
    for size in 16 32 48 128 256 512; do
        ICON_URL="https://raw.githubusercontent.com/${REPO}/master/assets/icons/hicolor/${size}x${size}/apps/isi-music.png"
        ICON_DEST="${ICON_BASE}/${size}x${size}/apps/isi-music.png"
        mkdir -p "$(dirname "$ICON_DEST")"
        curl -fsSL "$ICON_URL" -o "$ICON_DEST" 2>/dev/null || true
    done

    # Download .desktop file
    mkdir -p "$APPS_DIR"
    DESKTOP_URL="https://raw.githubusercontent.com/${REPO}/master/assets/isi-music.desktop"
    curl -fsSL "$DESKTOP_URL" -o "${APPS_DIR}/isi-music.desktop" 2>/dev/null || true

    # Update desktop database (best effort)
    update-desktop-database "$APPS_DIR" 2>/dev/null || true
    ok "Desktop icon and launcher installed"
fi
echo ""

# Step 3: Setup wizard
echo -e "  ${BOLD}Step 3/3: Setup wizard${RESET}"
echo ""

if command_exists "$BINARY_NAME"; then
    info "Launching setup wizard…"
    echo ""
    "$BINARY_NAME" setup || warn "Setup wizard exited with an error. You can re-run it later with: isi-music setup"
else
    warn "isi-music not found on PATH. Skipping setup wizard."
    warn "Run '${BINARY_NAME} setup' after ensuring ${INSTALL_DIR} is on your PATH."
fi
echo ""

# Summary
echo -e "  $(printf '-%.0s' {1..50})"
echo -e "  ${BOLD}${GREEN}Installation complete!${RESET}"
echo ""
echo -e "  Next steps:"
echo -e "    1. Run ${BOLD}isi-music${RESET} to start playing"
echo -e "    2. Run ${BOLD}isi-music doctor${RESET} if something isn't working"
echo ""