#!/bin/sh
# ─────────────────────────────────────────────────────────────────────────────
#  Birdify CLI installer  ·  macOS & Linux
#
#    curl -fsSL https://birdify.dev/install.sh | sh
#
#  Detects your OS + architecture, downloads the matching prebuilt binary,
#  verifies its SHA-256 against the published checksums, and installs it onto
#  your PATH. Windows users: irm https://birdify.dev/install.ps1 | iex
#
#  Environment overrides:
#    BIRDIFY_INSTALL_DIR       install location (default: /usr/local/bin → ~/.local/bin)
#    BIRDIFY_VERSION           version tag to install (default: latest)
#    BIRDIFY_INSTALL_BASE_URL  override the download base URL (advanced / testing)
# ─────────────────────────────────────────────────────────────────────────────
set -eu

REPO="krishpranav/birdify-cli"
VERSION="${BIRDIFY_VERSION:-latest}"

# ── pretty output (only when writing to a terminal) ──────────────────────────
if [ -t 2 ]; then
  B=$(printf '\033[1m'); DIM=$(printf '\033[2m'); BLUE=$(printf '\033[38;5;33m')
  GREEN=$(printf '\033[32m'); RED=$(printf '\033[31m'); R=$(printf '\033[0m')
else
  B=; DIM=; BLUE=; GREEN=; RED=; R=
fi
say()  { printf '%s\n' "$*" >&2; }
step() { printf '  %s➜%s %s\n' "$BLUE" "$R" "$*" >&2; }
ok()   { printf '  %s✓%s %s\n' "$GREEN" "$R" "$*" >&2; }
die()  { printf '  %s✗ %s%s\n' "$RED" "$*" "$R" >&2; exit 1; }

# ── prerequisites ────────────────────────────────────────────────────────────
if command -v curl >/dev/null 2>&1; then
  fetch() { curl -fsSL "$1" -o "$2"; }
elif command -v wget >/dev/null 2>&1; then
  fetch() { wget -qO "$2" "$1"; }
else
  die "need curl or wget to download birdify"
fi

# ── detect platform ──────────────────────────────────────────────────────────
os=$(uname -s | tr '[:upper:]' '[:lower:]')
arch=$(uname -m)
case "$arch" in
  x86_64 | amd64) arch=amd64 ;;
  arm64 | aarch64) arch=arm64 ;;
  *) die "unsupported architecture: $arch (need x86_64 or arm64)" ;;
esac
case "$os" in
  darwin | linux) ;;
  msys* | mingw* | cygwin* | windows*)
    die "Windows detected — run in PowerShell instead: irm https://birdify.dev/install.ps1 | iex" ;;
  *) die "unsupported OS: $os (macOS and Linux only)" ;;
esac

asset="birdify_${os}_${arch}"

if [ -n "${BIRDIFY_INSTALL_BASE_URL:-}" ]; then
  base="$BIRDIFY_INSTALL_BASE_URL"
elif [ "$VERSION" = "latest" ]; then
  base="https://github.com/${REPO}/releases/latest/download"
else
  base="https://github.com/${REPO}/releases/download/${VERSION}"
fi

say ""
say "  ${B}${BLUE}🐦 Birdify${R} ${DIM}· over-the-air code push${R}"
say ""

# ── download ─────────────────────────────────────────────────────────────────
tmp=$(mktemp -d)
trap 'rm -rf "$tmp"' EXIT INT TERM

step "Downloading ${B}${asset}${R} ${DIM}(${os}/${arch})${R}"
fetch "$base/$asset" "$tmp/birdify" || die "download failed: $base/$asset"
fetch "$base/checksums.txt" "$tmp/checksums.txt" || die "could not fetch checksums.txt"

# ── verify sha256 ────────────────────────────────────────────────────────────
expected=$(awk -v a="$asset" '$2==a || $2=="*"a {print $1}' "$tmp/checksums.txt" | head -n1)
[ -n "$expected" ] || die "no checksum entry for $asset"
if command -v shasum >/dev/null 2>&1; then
  actual=$(shasum -a 256 "$tmp/birdify" | awk '{print $1}')
elif command -v sha256sum >/dev/null 2>&1; then
  actual=$(sha256sum "$tmp/birdify" | awk '{print $1}')
else
  die "need shasum or sha256sum to verify the download"
fi
[ "$expected" = "$actual" ] || die "checksum mismatch (expected $expected, got $actual)"
ok "Checksum verified ${DIM}(sha256)${R}"

chmod +x "$tmp/birdify"

# ── choose an install dir ────────────────────────────────────────────────────
dir="${BIRDIFY_INSTALL_DIR:-}"
if [ -z "$dir" ]; then
  if [ "$(id -u)" = "0" ] || [ -w /usr/local/bin ] 2>/dev/null; then
    dir="/usr/local/bin"
  else
    dir="$HOME/.local/bin"
  fi
fi
mkdir -p "$dir" 2>/dev/null || true

if [ -w "$dir" ]; then
  mv "$tmp/birdify" "$dir/birdify"
elif command -v sudo >/dev/null 2>&1; then
  step "Installing to ${B}$dir${R} ${DIM}(requires sudo)${R}"
  sudo mv "$tmp/birdify" "$dir/birdify"
else
  die "cannot write to $dir and sudo is unavailable — set BIRDIFY_INSTALL_DIR to a writable directory"
fi
ok "Installed ${B}birdify${R} → $dir/birdify"

# ── PATH hint ────────────────────────────────────────────────────────────────
case ":$PATH:" in
  *":$dir:"*) ;;
  *)
    say ""
    step "Add ${B}$dir${R} to your PATH, then restart your shell:"
    say "      ${DIM}export PATH=\"$dir:\$PATH\"${R}" ;;
esac

say ""
"$dir/birdify" version 2>/dev/null || true
say ""
ok "Get started: ${DIM}birdify flutter|rn|native create <app>${R}"
say ""