# syntax=docker/dockerfile:1
###############################################################################
# All-in-one LSP Gateway Image
#   - Go        → gopls
#   - JS / TS   → typescript-language-server
#   - Java      → Eclipse JDT Language Server (jdtls) + JDK 22
###############################################################################

# ── Stage 1: Build Go gateway binary ────────────────────────────────────────
FROM golang:1.25-bookworm AS builder
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -ldflags="-s -w" -o /out/server ./cmd/server

# ── Stage 2: Build gopls ────────────────────────────────────────────────────
FROM golang:1.25-bookworm AS gopls-builder
RUN go install golang.org/x/tools/gopls@latest

# ── Stage 3: Runtime ────────────────────────────────────────────────────────
FROM eclipse-temurin:22-jdk-noble

ARG NODE_MAJOR=22

# ---- System deps: Node.js, python3 (jdtls launcher) ----
RUN apt-get update && \
    apt-get install -y --no-install-recommends ca-certificates curl python3 && \
    curl -fsSL https://deb.nodesource.com/setup_${NODE_MAJOR}.x | bash - && \
    apt-get install -y --no-install-recommends nodejs && \
    rm -rf /var/lib/apt/lists/*

# ---- typescript-language-server (covers JavaScript + TypeScript) ----
RUN npm install -g typescript-language-server typescript && \
    npm cache clean --force

# ---- Go toolchain (gopls needs it at runtime for analysis) ----
COPY --from=golang:1.25-bookworm /usr/local/go /usr/local/go
ENV PATH="/usr/local/go/bin:/go/bin:${PATH}" \
    GOPATH="/go"

# ---- gopls ----
COPY --from=gopls-builder /go/bin/gopls /go/bin/gopls

# ---- Eclipse JDT Language Server ----
COPY jdt-language-server-1.57.0-202602111032 /opt/jdtls
RUN chmod +x /opt/jdtls/bin/jdtls /opt/jdtls/bin/jdtls.py

# ---- Gateway binary ----
WORKDIR /app
COPY --from=builder /out/server /app/server
COPY config.example.json /app/config.example.json

# ---- Default config: all 4 LSP servers, Redis/Nacos off by default ----
COPY <<'EOF' /app/config.json
{
  "port": "8080",
  "workspaceDir": "/workspace",
  "allowOrigin": "*",
  "requestTimeout": "30s",
  "sessionTTL": "20m",
  "cleanupInterval": "2m",
  "maxSessions": 256,
  "enableRedis": false,
  "enableNacosRegister": false,
  "appEnv": "prod",
  "logLevel": "info",
  "logConsoleEnabled": true,
  "servers": [
    { "language": "go",         "languageId": "go",         "command": "gopls",                     "args": [] },
    { "language": "javascript", "languageId": "javascript", "command": "typescript-language-server", "args": ["--stdio"] },
    { "language": "typescript", "languageId": "typescript", "command": "typescript-language-server", "args": ["--stdio"] },
    { "language": "java",       "languageId": "java",       "command": "/opt/jdtls/bin/jdtls",      "args": [] }
  ]
}
EOF

# ---- Directories & non-root user ----
RUN mkdir -p /workspace /go && \
    groupadd --system app && \
    useradd --system --gid app --home-dir /home/app --create-home app && \
    chown -R app:app /app /workspace /go /home/app

ENV PORT=8080 \
    WORKSPACE_DIR=/workspace
EXPOSE 8080

USER app
ENTRYPOINT ["/app/server"]