#!/data/data/com.termux/files/usr/bin/bash
#
# Installer for pure Android/aarch64 OpenCode builds (opencode-android).
#
#   bash <(curl -fsSL https://raw.githubusercontent.com/astreele/opencode-android/master/install.sh)
#
# Default: registers the signed APT repository
# (https://opencode-android-apt.psmsword148.workers.dev) and installs/upgrades the
# opencode2 package with the system package manager. Later updates then
# arrive through `pkg upgrade`, like any other program.
#
# Options (append after the command):
#   --cmd opencode     install ONLY as `opencode` (run from just that command;
#                      no opencode2 name, no symlink; implies --zip because
#                      the deb always ships opencode2 + the opencode link)
#   --cmd opencode2    default: install opencode2 + link opencode -> opencode2
#   --no-link          never touch $PREFIX/bin/opencode (implies --zip)
#   --force            replace an existing opencode this installer doesn't manage
#   --apt              force the package-manager path (default)
#   --zip              legacy direct-download path (zip asset + SHA256SUMS check)
#   --no-verify        (zip only) skip SHA256SUMS verification (emergency only)
#
set -e

REPO="astreele/opencode-android"
APT_ROOT="https://opencode-android-apt.psmsword148.workers.dev"
# The key URL is overridable for tests; the raw.githubusercontent copy is the
# fallback for devices reaching GitHub before Pages serves the branch.
APT_KEY_URL="${APT_KEY_URL:-$APT_ROOT/opencode-android.gpg}"
APT_KEY_FALLBACK="https://raw.githubusercontent.com/${REPO}/master/apt/opencode-android.gpg"
PREFIX="${PREFIX:-/data/data/com.termux/files/usr}"

CMD="${OPENCODE_CMD:-opencode2}"
LINK=1
FORCE="${OPENCODE_FORCE:-0}"
VERIFY=1
METHOD="auto"

usage() {
    cat <<'EOF'
opencode-android installer

Usage: install.sh [options]

Options:
  --cmd NAME    Which command to install: 'opencode2' (default) or 'opencode'.
                '--cmd opencode' installs the program so it runs from just
                the `opencode` command — no opencode2 name, no symlink
                (uses the --zip path; the deb always ships both names).
  --link        Create/refresh the `opencode` -> `opencode2` symlink
                (default for --cmd opencode2).
  --no-link     Install opencode2 but never touch $PREFIX/bin/opencode
                (use when a v1 `opencode` should keep working; uses --zip).
  --force       Replace an existing $PREFIX/bin/opencode that this installer
                does not manage (e.g. a v1 install). Without this flag such a
                file is left untouched and v2 stays available as `opencode2`.
  --apt         Install through the system package manager (default):
                registers the signed APT repository and runs
                `pkg install opencode2`. Later updates arrive via `pkg upgrade`.
  --zip         Legacy path instead: download the release zip, verify it
                against SHA256SUMS, and copy the files by hand.
  --no-verify   (zip only) Skip SHA256SUMS verification. The installer
                verifies the download digest by default; only use this in an
                emergency.
  -h, --help    Show this help.

Environment: OPENCODE_CMD (same as --cmd), OPENCODE_FORCE=1 (same as --force).

Examples:
  install.sh                      # opencode2 via pkg (default) + opencode symlink
  install.sh --zip                # same layout, direct download instead of pkg
  install.sh --cmd opencode       # just the `opencode` command (zip path)
  install.sh --no-link            # opencode2 only, leave v1's opencode alone
EOF
}

die() {
    echo "FAILED: $*" >&2
    exit 1
}

# Is $1 a binary/link managed by this project (and not a foreign/v1 install)?
is_ours() {
    if [ -L "$1" ]; then
        case "$(readlink "$1")" in
            *opencode2*) return 0 ;;
            *) return 1 ;;
        esac
    fi
    [ -f "$1" ] || return 1
    grep -q "wrapper for OpenCode 2 CLI" "$1" 2>/dev/null
}

# Who owns a path according to the package manager (best effort, for hints)?
owner_of() {
    if command -v dpkg >/dev/null 2>&1; then
        dpkg -S "$1" 2>/dev/null | head -n 1 || true
    elif command -v pacman >/dev/null 2>&1; then
        pacman -Qo "$1" 2>/dev/null || true
    fi
}

# ── options ────────────────────────────────────────────────────────────
while [ $# -gt 0 ]; do
    case "$1" in
        --cmd)
            [ $# -ge 2 ] || die "--cmd needs a value (opencode|opencode2)"
            CMD="$2"; shift 2 ;;
        --cmd=*) CMD="${1#--cmd=}"; shift ;;
        --link) LINK=1; shift ;;
        --no-link) LINK=0; shift ;;
        --force) FORCE=1; shift ;;
        --apt) METHOD="apt"; shift ;;
        --zip) METHOD="zip"; shift ;;
        --no-verify) VERIFY=0; shift ;;
        -h|--help) usage; exit 0 ;;
        *) echo "unknown option: $1" >&2; usage >&2; exit 1 ;;
    esac
done

case "$CMD" in
    opencode|opencode2) ;;
    *) die "--cmd must be 'opencode' or 'opencode2' (got '$CMD')" ;;
esac

# The deb always ships opencode2 + the opencode link, so single-name and
# no-link installs can only come from the zip path.
if [ "$METHOD" = "apt" ]; then
    if [ "$CMD" = "opencode" ]; then
        die "--cmd opencode needs --zip (the deb always ships opencode2 + the opencode link)"
    fi
    if [ "$LINK" = 0 ]; then
        die "--no-link needs --zip (the deb always ships the opencode link)"
    fi
elif [ "$METHOD" = "auto" ]; then
    if [ "$CMD" = "opencode" ] || [ "$LINK" = 0 ]; then
        echo "(note: --cmd $CMD / --no-link uses the direct-download path)"
        METHOD="zip"
    else
        METHOD="apt"
    fi
fi

stop_ours() {
    for c in opencode opencode2; do
        if [ -x "$PREFIX/bin/$c" ] && is_ours "$PREFIX/bin/$c"; then
            "$PREFIX/bin/$c" service stop >/dev/null 2>&1 || true
        fi
    done
    if command -v pkill >/dev/null 2>&1; then
        pkill -f "libexec/opencode" >/dev/null 2>&1 || true
    fi
}

# ── package-manager path ─────────────────────────────────────────────
install_apt() {
    command -v pkg >/dev/null 2>&1 ||
        die "pkg not found — the package-manager path needs Termux (use --zip elsewhere)"
    command -v curl >/dev/null 2>&1 || pkg install -y curl

    echo "[1] Checking for a foreign 'opencode'..."

    # dpkg-owned v1 is handled by the deb itself (Conflicts/Replaces); only a
    # hand-installed file needs the explicit guard. Runs first so a refusal
    # happens before anything is registered or downloaded.
    L="$PREFIX/bin/opencode"
    if { [ -e "$L" ] || [ -L "$L" ]; } && ! is_ours "$L" && ! owner_of "$L" | grep -q .; then
        if [ "$FORCE" = 1 ]; then
            echo "WARNING: replacing existing $L (--force)"
        else
            die "$L already exists and is not managed by this installer.
Options:
  • install without touching it:         install.sh --zip --no-link
    (v2 then runs as \`opencode2\`)
  • replace it with this build:          install.sh --force
Nothing was installed."
        fi
    fi

    echo "[2] Registering the package repository..."

    SOURCES_DIR="$PREFIX/etc/apt/sources.list.d"
    KEYRING_DIR="$PREFIX/etc/apt/trusted.gpg.d"
    mkdir -p "$SOURCES_DIR" "$KEYRING_DIR"

    printf 'deb %s stable main\n' "$APT_ROOT" > "$SOURCES_DIR/opencode-android.list"
    if curl -fL --retry 3 -o "$KEYRING_DIR/opencode-android.gpg.tmp" "$APT_KEY_URL" 2>/dev/null ||
        curl -fL --retry 3 -o "$KEYRING_DIR/opencode-android.gpg.tmp" "$APT_KEY_FALLBACK"; then
        mv -f "$KEYRING_DIR/opencode-android.gpg.tmp" \
            "$KEYRING_DIR/opencode-android.gpg"
        echo "repository key installed"
    else
        rm -f "$KEYRING_DIR/opencode-android.gpg.tmp"
        die "could not fetch the repository key from
  $APT_KEY_URL
  $APT_KEY_FALLBACK
Nothing was installed."
    fi

    echo "[3] Updating package lists..."

    pkg update -y

    echo "[4] Stopping existing OpenCode..."

    stop_ours
    sleep 1

    echo "[5] Installing opencode2 (re-run any time to update)..."

    pkg install -y opencode2

    echo "[6] Verifying..."

    "$PREFIX/bin/opencode2" --version

    echo
    echo "================================"
    echo " OpenCode installed successfully"
    echo "================================"
    echo
    echo "Installed (package manager):"
    echo "  $PREFIX/bin/opencode2"
    echo "  $PREFIX/bin/opencode -> opencode2"
    echo "  repository: $APT_ROOT"
    echo
    echo "Update later like any other program:"
    echo "  pkg upgrade"
    echo
    echo "Uninstall:"
    echo "  pkg uninstall opencode2"
    echo
    echo "Run:"
    echo "  opencode2 auth   # connect a provider (or: opencode auth)"
    echo "  opencode2        # TUI (or: opencode)"
}

# ── direct-download path (legacy) ────────────────────────────────────
install_zip() {
    echo "[1] Resolving latest release..."

    API="https://api.github.com/repos/${REPO}/releases/latest"

    TAG=$(curl -fsSL "$API" |
        awk -F'"' '/"tag_name"/ {print $4; exit}')

    if [ -z "$TAG" ]; then
        die "could not resolve latest release"
    fi

    echo "TAG=$TAG"

    echo "[2] Installing dependencies..."

    pkg update -y
    pkg install -y curl unzip grep ripgrep libc++ coreutils

    echo "[3] Creating temporary directory..."

    TMP=$(mktemp -d)
    trap 'rm -rf "$TMP"' EXIT

    cd "$TMP"

    echo "[4] Getting release information..."

    RELEASE_API="https://api.github.com/repos/${REPO}/releases/tags/${TAG}"

    RELEASE=$(curl -fsSL "$RELEASE_API")

    echo "[5] Finding Android ARM64 binary..."

    ZIP=$(printf '%s\n' "$RELEASE" |
        grep -oE '"name"[[:space:]]*:[[:space:]]*"[^"]*android[^"]*aarch64[^"]*\.zip"' |
        head -n 1 |
        cut -d '"' -f 4)

    if [ -z "$ZIP" ]; then
        echo
        die "could not find Android ARM64 ZIP. Available release assets:
$(printf '%s\n' "$RELEASE" | grep -oE '"name"[[:space:]]*:[[:space:]]*"[^"]+"' | cut -d '"' -f 4)"
    fi

    echo "Found: $ZIP"

    DOWNLOAD="https://github.com/${REPO}/releases/download/${TAG}/${ZIP}"

    echo "[6] Downloading..."

    curl -fL --retry 3 -o "$ZIP" "$DOWNLOAD"

    echo "[7] Verifying download (SHA256SUMS)..."

    if [ "$VERIFY" = 1 ]; then
        command -v sha256sum >/dev/null 2>&1 ||
            die "sha256sum missing (coreutils); refusing to install unverified — fix coreutils or pass --no-verify"
        curl -fL --retry 3 -o SHA256SUMS \
            "https://github.com/${REPO}/releases/download/${TAG}/SHA256SUMS" ||
            die "release $TAG has no SHA256SUMS; pass --no-verify only if you accept an unverified download"
        # 2>/dev/null || true: an unreadable SHA256SUMS must fall through to the
        # explicit "no entry" error below, not die silently under set -e.
        EXPECTED=$(awk -v f="$ZIP" '$2 == f {print $1; exit}' SHA256SUMS 2>/dev/null || true)
        [ -n "$EXPECTED" ] || die "SHA256SUMS contains no entry for $ZIP"
        ACTUAL=$(sha256sum "$ZIP" | awk '{print $1}')
        if [ "$EXPECTED" != "$ACTUAL" ]; then
            die "checksum mismatch for $ZIP
  expected: $EXPECTED
  actual:   $ACTUAL
The download is corrupt or was tampered with; nothing was installed."
        fi
        echo "checksum OK: $ZIP"
    else
        echo "skipped (--no-verify)"
    fi

    echo "[8] Extracting..."

    unzip -o "$ZIP"

    if [ ! -f opencode2 ]; then
        die "opencode2 not found in archive"
    fi

    if [ ! -f opencode2.bin ]; then
        die "opencode2.bin not found in archive"
    fi

    # ── guard: never silently clobber a command we don't own (e.g. v1) ─────
    TARGET="$PREFIX/bin/$CMD"
    if { [ -e "$TARGET" ] || [ -L "$TARGET" ]; } && ! is_ours "$TARGET"; then
        OWNER=$(owner_of "$TARGET")
        if [ "$FORCE" = 1 ]; then
            echo "WARNING: replacing existing $TARGET (--force)"
            if [ -n "$OWNER" ]; then echo "  it was provided by: $OWNER"; fi
        else
            if [ "$CMD" = "opencode" ]; then
                die "$TARGET already exists and is not managed by this installer.
${OWNER:+  It is provided by: $OWNER}
Options:
  • replace it with this build:          install.sh --cmd opencode --force
  • keep it and install v2 under
    a different command name:            install.sh --cmd opencode2 --no-link
    (v2 then runs as \`opencode2\`)
Nothing was installed."
            else
                die "$TARGET already exists and is not managed by this installer.
${OWNER:+  It is provided by: $OWNER}
Options:
  • install without touching it:         install.sh --no-link
  • replace it with this build:          install.sh --force
  • install v2 under a single command:   install.sh --cmd opencode
Nothing was installed."
            fi
        fi
    fi

    echo "[9] Stopping existing OpenCode..."

    stop_ours

    sleep 1

    echo "[10] Installing (command: $CMD)..."

    mkdir -p "$PREFIX/bin"
    mkdir -p "$PREFIX/libexec/$CMD"

    # The shipped wrapper is named opencode2; rewrite its internal paths when the
    # user asked for a different command name (--cmd opencode).
    sed -e "s/opencode2\.bin/${CMD}.bin/g" \
        -e "s|libexec/opencode2|libexec/${CMD}|g" \
        -e "s/opencode2: error/${CMD}: error/g" \
        -e "s/# opencode2 - wrapper/# ${CMD} - wrapper/g" \
        opencode2 > "$PREFIX/bin/$CMD"
    chmod 755 "$PREFIX/bin/$CMD"
    cp -f opencode2.bin "$PREFIX/libexec/$CMD/$CMD.bin"
    chmod 755 "$PREFIX/libexec/$CMD/$CMD.bin"

    # Ship the license alongside the binary (present in release zips).
    if [ -f LICENSE ]; then
        mkdir -p "$PREFIX/share/doc/$CMD"
        cp -f LICENSE "$PREFIX/share/doc/$CMD/"
    fi

    echo "[11] Linking 'opencode'..."

    LINK_STATE="not requested"
    if [ "$CMD" = "opencode" ]; then
        LINK_STATE="runs directly as 'opencode' (no symlink)"
    elif [ "$LINK" = 0 ]; then
        LINK_STATE="skipped (--no-link)"
    else
        L="$PREFIX/bin/opencode"
        if { [ -e "$L" ] || [ -L "$L" ]; } && ! is_ours "$L"; then
            if [ "$FORCE" = 1 ]; then
                OWNER=$(owner_of "$L")
                echo "WARNING: replacing existing $L (--force)"
                if [ -n "$OWNER" ]; then echo "  it was provided by: $OWNER"; fi
                ln -sf "$TARGET" "$L"
                LINK_STATE="replaced (--force)"
            else
                LINK_STATE="left untouched (existing '$L' is not ours)"
                echo
                echo "  NOTE: $L exists and was left alone (likely a v1 install)."
                echo "  v2 is installed and runs as:  opencode2"
                echo "  To make \`opencode\` run v2 instead:"
                echo "    • remove the old command first (e.g. pkg uninstall <package>),"
                echo "      or re-run with --force to replace it,"
                echo "    • or re-run with --no-link to keep both as-is."
            fi
        else
            ln -sf "$TARGET" "$L"
            LINK_STATE="created ($L -> opencode2)"
        fi
    fi

    echo "[12] Verifying..."

    "$PREFIX/bin/$CMD" --version

    echo
    echo "================================"
    echo " OpenCode installed successfully"
    echo "================================"
    echo
    echo "Installed:"
    echo "  $PREFIX/bin/$CMD"
    echo "  $PREFIX/libexec/$CMD/$CMD.bin"
    if [ "$CMD" = "opencode2" ]; then
        echo "  symlink opencode: $LINK_STATE"
    else
        echo "  opencode link: $LINK_STATE"
    fi
    echo
    echo "Uninstall:"
    echo "  rm -f  $PREFIX/bin/$CMD"
    echo "  rm -rf $PREFIX/libexec/$CMD"
    echo "  rm -f  $PREFIX/share/doc/$CMD/LICENSE"
    if [ "$CMD" = "opencode2" ]; then
        echo "  rm -f  $PREFIX/bin/opencode   # only if it points to opencode2"
    fi
    echo
    echo "Run:"
    echo "  $CMD auth   # connect a provider"
    echo "  $CMD        # TUI"
}

case "$METHOD" in
    apt) install_apt ;;
    zip) install_zip ;;
esac