// cell build [--target <target>] - Build a static cell binary for a project
// Collects all C files from cell source, scripts, and project packages,
// compiles them, and links into a single static executable.

var build = use('build')
var shop = use('shop')
var fd = use('fd')
var os = use('os')

var targets = [
  "arm64-macos",
  "x86_64-macos",
  "x86_64-linux",
  "arm64-linux",
  "windows",
  "playdate"
]

// Parse arguments
var target = null
for (var i = 0; i < args.length; i++) {
  if (args[i] == '--target' || args[i] == '-t') {
    if (i + 1 < args.length) {
      target = args[i + 1]
      i++
    } else {
      log.error("--target requires an argument")
      log.console("Available targets: " + targets.join(', '))
      $_.stop()
    }
  } else if (args[i] == '--help' || args[i] == '-h') {
    log.console("Usage: cell build [--target <target>]")
    log.console("Build a static cell binary for the current project.")
    log.console("")
    log.console("Options:")
    log.console("  --target, -t <target>  Cross-compile for target platform")
    log.console("")
    log.console("Available targets: " + targets.join(', '))
    $_.stop()
  } else if (args[i] == '--list-targets') {
    log.console("Available targets:")
    for (var t = 0; t < targets.length; t++) {
      log.console("  " + targets[t])
    }
    $_.stop()
  }
}

// Resolve target
target = build.resolve_target(target)
if (target) {
  log.console("Building for target: " + target)
} else {
  log.console("Building for host platform")
}

// Find cell package - it should be at ~/work/cell or a dependency
var cell_dir = null

// First check if we're in the cell directory itself
if (fd.is_file('source/cell.c') && fd.is_file('source/quickjs.c')) {
  cell_dir = '.'
  log.console("Building from cell source directory")
} else {
  // Check for cell as a local path dependency or linked package
  var config = shop.load_config()
  if (config && config.dependencies && config.dependencies.cell) {
    var pkg = config.dependencies.cell
    var parsed = shop.parse_package(pkg)
    var pkg_dir = '.cell/modules/' + parsed.path
    if (fd.is_file(pkg_dir + '/source/cell.c')) {
      cell_dir = pkg_dir
      log.console("Using cell from dependency: " + pkg_dir)
    }
  }
  
  // Fallback: try ~/work/cell
  if (!cell_dir) {
    var home_cell = os.getenv('HOME') + '/work/cell'
    if (fd.is_file(home_cell + '/source/cell.c')) {
      cell_dir = home_cell
      log.console("Using cell from: " + cell_dir)
    }
  }
}

if (!cell_dir) {
  log.error("Could not find cell source. Add cell as a dependency or run from cell directory.")
  $_.stop()
}

// Collect all C files from cell
var source_files = build.list_files(cell_dir + '/source')
var script_files = build.list_files(cell_dir + '/scripts')

// Prefix with directory
var all_files = []
for (var i = 0; i < source_files.length; i++) {
  all_files.push('source/' + source_files[i])
}
for (var i = 0; i < script_files.length; i++) {
  all_files.push('scripts/' + script_files[i])
}

// Select C files for target
var c_files = build.select_c_files(all_files, target)

// Debug: show which files were selected
if (target == 'playdate') {
  for (var i = 0; i < c_files.length; i++) {
    if (c_files[i].indexOf('fd') >= 0 || c_files[i].indexOf('main') >= 0) {
      log.console("  Selected: " + c_files[i])
    }
  }
}

log.console("Found " + text(c_files.length) + " C files to compile")

// Get build directory
var build_dir = build.get_build_dir(target)
build.ensure_dir(build_dir)

// Load cell config for platform-specific flags
var cell_config = build.load_config(cell_dir)
var target_system = build.get_target_system(target)
var platform = target_system || os.platform()

var cflags = build.get_flags(cell_config, platform, 'CFLAGS')
var ldflags = build.get_flags(cell_config, platform, 'LDFLAGS')

// Compile options
var compile_options = {
  target: target,
  cflags: cflags,
  includes: [cell_dir + '/source'],
  defines: {}
}

// Add target-specific defines
if (target == 'playdate') {
  compile_options.defines.TARGET_PLAYDATE = true
}

// Compile all C files
var objects = []
for (var i = 0; i < c_files.length; i++) {
  var src = cell_dir + '/' + c_files[i]
  var obj = build_dir + '/' + c_files[i] + '.o'
  
  // Check if recompilation needed
  var needs_compile = true
  if (fd.is_file(obj)) {
    var src_stat = fd.stat(src)
    var obj_stat = fd.stat(obj)
    if (src_stat && obj_stat && src_stat.mtime <= obj_stat.mtime) {
      needs_compile = false
    }
  }
  
  if (needs_compile) {
    var result = build.compile_file(src, obj, compile_options)
    if (!result) {
      log.error("Build failed")
      $_.stop()
    }
  }
  objects.push(obj)
}

// Collect C files from project packages
var packages = shop.list_packages()
for (var p = 0; p < packages.length; p++) {
  var pkg = packages[p]
  var parsed = shop.parse_package(pkg)
  var pkg_dir = '.cell/modules/' + parsed.path
  
  if (!fd.is_dir(pkg_dir)) continue
  
  var pkg_files = build.list_files(pkg_dir)
  var pkg_c_files = build.select_c_files(pkg_files, target)
  
  var pkg_config = build.load_config(pkg_dir)
  var pkg_ldflags = build.get_flags(pkg_config, platform, 'LDFLAGS')
  if (pkg_ldflags) {
    if (ldflags != '') ldflags += ' '
    ldflags += pkg_ldflags
  }
  
  if (pkg_c_files.length > 0) {
    log.console("Compiling " + text(pkg_c_files.length) + " C files from " + parsed.path)
    
    var pkg_cflags = build.get_flags(pkg_config, platform, 'CFLAGS')
    
    // Create symbol prefix for package
    var use_prefix = 'js_' + parsed.path.replace(/\//g, '_').replace(/\./g, '_').replace(/-/g, '_') + '_'
    
    for (var f = 0; f < pkg_c_files.length; f++) {
      var src = pkg_dir + '/' + pkg_c_files[f]
      var obj = build_dir + '/packages/' + parsed.path + '/' + pkg_c_files[f] + '.o'
      
      var safe_name = pkg_c_files[f].substring(0, pkg_c_files[f].lastIndexOf('.')).replace(/\//g, '_').replace(/-/g, '_')
      var use_name = use_prefix + safe_name + '_use'
      
      var pkg_options = {
        target: target,
        cflags: pkg_cflags,
        includes: [cell_dir + '/source', pkg_dir],
        defines: { CELL_USE_NAME: use_name },
        module_dir: pkg_dir
      }
      
      var needs_compile = true
      if (fd.is_file(obj)) {
        var src_stat = fd.stat(src)
        var obj_stat = fd.stat(obj)
        if (src_stat && obj_stat && src_stat.mtime <= obj_stat.mtime) {
          needs_compile = false
        }
      }
      
      if (needs_compile) {
        var result = build.compile_file(src, obj, pkg_options)
        if (!result) {
          log.error("Build failed")
          $_.stop()
        }
      }
      objects.push(obj)
    }
  }
}

// Collect C files from local project (only if not building from cell source directory)
if (cell_dir != '.') {
  var local_config = shop.load_config() || {}
  var local_ldflags = build.get_flags(local_config, platform, 'LDFLAGS')
  if (local_ldflags) {
    if (ldflags != '') ldflags += ' '
    ldflags += local_ldflags
  }

  var local_files = build.list_files('.')
  var local_c_files = build.select_c_files(local_files, target)

  if (local_c_files.length > 0) {
    log.console("Compiling " + text(local_c_files.length) + " local C files")
    
    var local_cflags = build.get_flags(local_config, platform, 'CFLAGS')
    
    for (var f = 0; f < local_c_files.length; f++) {
      var src = local_c_files[f]
      var obj = build_dir + '/local/' + local_c_files[f] + '.o'
      
      var safe_name = local_c_files[f].substring(0, local_c_files[f].lastIndexOf('.')).replace(/\//g, '_').replace(/-/g, '_')
      var use_name = 'js_local_' + safe_name + '_use'
      
      var local_options = {
        target: target,
        cflags: local_cflags,
        includes: [cell_dir + '/source', '.'],
        defines: { CELL_USE_NAME: use_name }
      }
      
      var needs_compile = true
      if (fd.is_file(obj)) {
        var src_stat = fd.stat(src)
        var obj_stat = fd.stat(obj)
        if (src_stat && obj_stat && src_stat.mtime <= obj_stat.mtime) {
          needs_compile = false
        }
      }
      
      if (needs_compile) {
        var result = build.compile_file(src, obj, local_options)
        if (!result) {
          log.error("Build failed")
          $_.stop()
        }
      }
      objects.push(obj)
    }
  }
}

log.console("Compiled " + text(objects.length) + " object files")

// Link into executable
var exe_ext = build.get_exe_ext(target)
var exe_name = build_dir + '/cell' + exe_ext

var link_options = {
  target: target,
  ldflags: ldflags,
  libs: []
}

// Add platform-specific libraries
if (!target || platform == 'macOS' || platform == 'darwin') {
  // macOS needs no extra libs for static build
} else if (target == 'windows') {
  link_options.libs.push('ws2_32')
  link_options.libs.push('winmm')
}

var result = build.link_executable(objects, exe_name, link_options)
if (!result) {
  log.error("Linking failed")
  $_.stop()
}

// TODO: Append core.qop to executable
// For now, just report success
log.console("")
log.console("Build complete: " + exe_name)
log.console("")
log.console("Note: To create a fully functional cell binary, you need to append core.qop:")
log.console("  cat core.qop >> " + exe_name)

$_.stop()