# syntax=docker/dockerfile:1

ARG RUST_VERSION=1.98.1

# ---- Base: Rust toolchain + build tools ----
FROM rust:${RUST_VERSION}-slim-bookworm AS chef
WORKDIR /app

RUN apt-get update \
    && apt-get install -y --no-install-recommends curl ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Install the toolchain declared in rust-toolchain.toml (incl. wasm32 target) in its own layer
COPY rust-toolchain.toml .
RUN rustup show active-toolchain || rustup toolchain install

# Prebuilt binaries via cargo-binstall; wasm-bindgen-cli must match the version in Cargo.lock
RUN curl -L --proto '=https' --tlsv1.2 -sSf \
        https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh | bash \
    && cargo binstall -y --locked cargo-chef trunk

# ---- Planner: compute the dependency recipe ----
FROM chef AS planner
COPY . .
RUN cargo chef prepare --recipe-path recipe.json

# ---- Builder: cook deps (cached), then build the site with trunk ----
FROM chef AS builder
COPY --from=planner /app/recipe.json recipe.json
# Must match the flags trunk passes to cargo (see web/index.html) to reuse the cache
RUN cargo chef cook --release --target wasm32-unknown-unknown --no-default-features \
    --recipe-path recipe.json

COPY . .
RUN mkdir -p assets
RUN --mount=type=cache,target=/root/.cache/trunk \
    trunk build --release --locked

# ---- Runtime: static files served by nginx ----
FROM nginx:1.29-alpine AS runtime

COPY <<'EOF' /etc/nginx/conf.d/default.conf
server {
    listen 3000;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    gzip on;
    gzip_types application/wasm application/javascript text/css;

    # Bevy expects real 404s for missing assets (Trunk.toml: no_spa = true)
    location / {
        try_files $uri $uri/ =404;
    }

    location ~* \.(wasm|js|css)$ {
        add_header Cache-Control "public, max-age=31536000, immutable";
        try_files $uri =404;
    }

    location = /index.html {
        add_header Cache-Control "no-cache";
    }
}
EOF

COPY --from=builder /app/dist /usr/share/nginx/html

EXPOSE 3000