# ----------- Builder Stage -----------
FROM golang:1.26-alpine AS builder
WORKDIR /app

RUN apk add --no-cache build-base

# Install tooling early so it stays cached across source changes
RUN go install github.com/air-verse/air@latest \
  && go install github.com/a-h/templ/cmd/templ@latest

# Leverage module cache
COPY go.mod go.sum ./
RUN --mount=type=cache,target=/go/pkg/mod \
    go mod download

# Copy the rest of the sources
COPY . .

# Build once (helps verify builds and speeds CI with cache)
RUN --mount=type=cache,target=/root/.cache/go-build \
    --mount=type=cache,target=/go/pkg/mod \
    go build -ldflags="-s -w" -o rentease main.go

# ----------- Dev Stage -----------
FROM golang:1.26-alpine AS dev
WORKDIR /app

# Install runtime dependencies
RUN apk add --no-cache ca-certificates && apk add --no-cache golangci-lint

# Copy only necessary files from builder
COPY --from=builder /app/rentease ./rentease
COPY --from=builder /app/assets ./assets
COPY --from=builder /go/bin/air /go/bin/templ /go/bin/
COPY . .

EXPOSE 8000

CMD ["air", "-c", ".air.toml"]