from dataclasses import dataclass, field

from SCons.Node import NodeList
from SCons.Warnings import warn, WarningOnByDefault
from SCons.Errors import UserError

Import("ENV")

from fbt.appmanifest import FlipperAppType

appenv = ENV["APPENV"] = ENV.Clone(
    tools=[
        "fbt_extapps",
        "fbt_assets",
        "fbt_sdk",
    ],
    RESOURCES_ROOT=ENV.Dir("#/assets/resources"),
)

appenv.Replace(
    LINKER_SCRIPT_PATH=appenv["APP_LINKER_SCRIPT_PATH"],
)

appenv.AppendUnique(
    CCFLAGS=[
        "-ggdb3",
        "-mword-relocations",
        "-mlong-calls",
        "-fno-common",
        "-nostdlib",
        "-fvisibility=hidden",
    ],
    LINKFLAGS=[
        "-Ur",
        "-Wl,-Ur",
        # "-Wl,--orphan-handling=error",
        "-Bsymbolic",
        "-nostartfiles",
        "-mlong-calls",
        "-fno-common",
        "-nostdlib",
        "-Wl,--gc-sections",
        "-Wl,--no-export-dynamic",
        "-fvisibility=hidden",
        "-Wl,-e${APP_ENTRY}",
        "-Xlinker",
        "-Map=${TARGET}.map",
        "-specs=nano.specs",
        "-specs=nosys.specs",
    ],
    LIBS=[
        "m",
        "gcc",
        "stdc++",
        "supc++",
    ],
)


@dataclass
class FlipperExtAppBuildArtifacts:
    application_map: dict = field(default_factory=dict)
    resources_dist: NodeList = field(default_factory=NodeList)
    sdk_tree: NodeList = field(default_factory=NodeList)


apps_to_build_as_faps = [
    FlipperAppType.PLUGIN,
    FlipperAppType.EXTERNAL,
    FlipperAppType.DEBUG,
]

known_extapps = [
    app
    for apptype in apps_to_build_as_faps
    for app in appenv["APPBUILD"].get_apps_of_type(apptype, True)
]

# Ugly access to global option
if extra_app_list := GetOption("extra_ext_apps"):
    known_extapps.extend(map(appenv["APPMGR"].get, extra_app_list.split(",")))

incompatible_apps = []
for app in known_extapps:
    if not app.supports_hardware_target(appenv.subst("f${TARGET_HW}")):
        incompatible_apps.append(app)
        continue

    appenv.BuildAppElf(app)

extapps = FlipperExtAppBuildArtifacts()
extapps.application_map = appenv["EXT_APPS"]

if incompatible_apps:
    warn(
        WarningOnByDefault,
        f"Skipping build of {len(incompatible_apps)} incompatible app(s): "
        + ", ".join(f"'{app.name}' (id '{app.appid}')" for app in incompatible_apps),
    )

if appenv["FORCE"]:
    appenv.AlwaysBuild(
        list(app_artifact.compact for app_artifact in extapps.application_map.values())
    )


Alias(
    "faps",
    list(app_artifact.validator for app_artifact in extapps.application_map.values()),
)

extapps.resources_dist = appenv.FapDist(appenv["RESOURCES_ROOT"], [])


if appsrc := appenv.subst("$APPSRC"):
    appenv.AddAppLaunchTarget(appsrc, "launch_app")


# SDK management

amalgamated_api = "${BUILD_DIR}/sdk_origin"
sdk_source = appenv.ApiAmalgamator(
    amalgamated_api,
    # Deps on root SDK headers and generated files
    (appenv["SDK_HEADERS"], appenv["FW_ASSETS_HEADERS"]),
)
# Extra deps on headers included in deeper levels
# Available on second and subsequent builds
Depends(sdk_source, appenv.ProcessSdkDepends(f"{amalgamated_api}.d"))

appenv["SDK_DIR"] = appenv.Dir("${BUILD_DIR}/sdk_headers")
sdk_header_tree = appenv.SDKHeaderTreeExtractor(appenv["SDK_DIR"], amalgamated_api)
Depends(sdk_header_tree, appenv["SDK_DEFINITION"])
# AlwaysBuild(sdk_tree)
Alias("sdk_tree", sdk_header_tree)
extapps.sdk_tree = sdk_header_tree

api_check = appenv.ApiTableValidator(appenv["SDK_DEFINITION"], amalgamated_api)
Precious(api_check)
NoClean(api_check)
AlwaysBuild(api_check)
Alias("api_check", api_check)

firmware_apitable = appenv.ApiSymbolTable(
    "${BUILD_DIR}/assets/compiled/firmware_api_table.h", appenv["SDK_DEFINITION"]
)
Alias("api_table", firmware_apitable)
ENV.Replace(
    FW_API_TABLE=firmware_apitable,
    _APP_ICONS=appenv["_APP_ICONS"],
)


if appenv["FORCE"]:
    appenv.AlwaysBuild(sdk_source, sdk_header_tree, api_check, firmware_apitable)


Return("extapps")