# build.ludic — building the toolchain binaries and user programs.
#
# Replaces build-cli.sh (the ludicc/ludic front-end) and build.sh (compiling a
# Ludic program to a native app). All toolchain binaries land in bin/.

# compile a Ludic source to a native binary in bin/ via ludicc + clang (-O2).
# Returns true on success. Used for x itself and the editor tools.
function build_tool(name: pointer, src: pointer) -> bool {
  let ll = `build/{name}.ll`
  if not shq(`bin/ludicc {src} --emit-llvm -o {ll} 2>/dev/null`) { print(`build failed: {name} (compile)`); return false }
  # write to a temp then move, so a running bin/x can rebuild itself in place
  if not shq(`{cc()} -O2 {ll} -o bin/{name}.tmp`) { print(`build failed: {name} (link)`); return false }
  run(`mv -f bin/{name}.tmp bin/{name} && rm -f {ll}`)
  return true
}

# ---- build-cli: the self-hosted front-end binaries ---------------------------
# Both ludicc and ludic are the SAME multi-call binary assembled from the IR seed
# with clang alone; invoked as `ludic` it compiles-and-runs, as `ludicc` it just
# compiles.
function cmd_build_cli() -> int {
  run("mkdir -p bin build")
  print("cc: selfhost/ludicc.seed.ll -> bin/ludicc, bin/ludic  (from the IR seed, no C compiler)")
  if not shq(`{cc()} selfhost/ludicc.seed.ll -o bin/ludicc`) { err("x: seed did not assemble\n"); return 1 }
  run("cp bin/ludicc bin/ludic && chmod +x bin/ludicc bin/ludic")
  print("done. built bin/ludicc and bin/ludic")
  return 0
}

# ---- build: the whole toolchain (ludicc, ludic, x, ludic-fmt, ludic-lsp) -----
function cmd_build() -> int {
  if cmd_build_cli() != 0 { return 1 }
  print("ludicc: tools/x/main.ludic -> bin/x  (the task runner rebuilds itself)")
  if not build_tool("x", "tools/x/main.ludic") { return 1 }
  print("ludicc: tools/ludic-tools/fmt.ludic -> bin/ludic-fmt")
  if not build_tool("ludic-fmt", "tools/ludic-tools/fmt.ludic") { return 1 }
  print("ludicc: tools/ludic-tools/lsp.ludic -> bin/ludic-lsp")
  if not build_tool("ludic-lsp", "tools/ludic-tools/lsp.ludic") { return 1 }
  sync_vscode_grammar()
  print("done. toolchain in bin/ (ludicc, ludic, x, ludic-fmt, ludic-lsp)")
  return 0
}

# ---- app: compile a Ludic program to a native app ----------------------------
# usage: x app <file.ludic> [--headless|--windowed] [--save-temps]
# windowed is the default for a game; headless renders the last frame to out.ppm.
function cmd_app() -> int {
  ensure_ludicc()
  var src = null
  var mode = 1            # 1 = windowed, 2 = headless
  var save = false
  var ai = 2
  while ai < arg_count() {
    let a = arg(ai)
    if (a == "--headless") { mode = 2 }
    else if (a == "--windowed") { mode = 1 }
    else if (a == "--save-temps") { save = true }
    else if (a[0] != 45) { src = a }        # 45 = '-', so skip other flags
    ai = ai + 1
  }
  if (src == null) { err("usage: x app <file.ludic> [--headless] [--save-temps]\n"); return 1 }
  let name = capture_line(`basename {src} .ludic`)

  if (mode == 2) {
    let outbin = `build/{name}_headless`
    let ll = `{outbin}.ll`
    print(`ludicc: {src} -> {outbin}  (renders the last frame to out.ppm)`)
    if not shq(`bin/ludicc --headless {src} > {ll}`) { return 1 }
    if not shq(`{cc()} -O2 {ll} -o {outbin}`) { return 1 }
    if not save { run(`rm -f {ll}`) }
    print(`done. run: printf 'ddss' | ./{outbin} && open out.ppm`)
    return 0
  }

  let outbin = `build/{name}`
  let ll = `{outbin}.ll`
  print(`ludicc: {src} -> {outbin}  (Ludic-written compiler -> LLVM IR -> windowed binary)`)
  if not shq(`bin/ludicc --windowed {src} > {ll}`) { return 1 }
  if not shq(`{cc()} -O2 {ll} runtime/native/cocoa.ll -framework Cocoa -Wl,-rpath,@loader_path -o {outbin}`) { return 1 }
  if not save { run(`rm -f {ll}`) }
  print(`done. run: ./{outbin}   (from the repo root, so assets/ resolves)`)
  return 0
}

# Remove every generated artifact and leave the tracked source untouched: the
# whole build/ tree (IR, objects, compiled apps), the headless render dropped in
# the root (out.ppm), and any stray *.tmp/*.ll left behind by a failed build.
# The toolchain binaries in bin/ are kept so the running `x` survives; rebuild
# them any time with `x build`.
function cmd_clean() -> int {
  run("rm -rf build")
  run("rm -f out.ppm bin/*.tmp")
  print("cleaned: build/, out.ppm, bin/*.tmp  (bin/ toolchain kept — `x build` to rebuild)")
  return 0
}