#!/usr/bin/env python3
# trunk-ignore-all(ruff/F821)
# trunk-ignore-all(flake8/F821): For SConstruct imports
import sys
from os.path import join, basename, isfile
import subprocess
import json
import re
from datetime import datetime

from readprops import readProps

Import("env")
platform = env.PioPlatform()
progname = env.get("PROGNAME")
lfsbin = f"{progname.replace('firmware-', 'littlefs-')}.bin"

def manifest_gather(source, target, env):
    out = []
    check_paths = [
        progname,
        f"{progname}.elf",
        f"{progname}.bin",
        f"{progname}.factory.bin",
        f"{progname}.hex",
        f"{progname}.merged.hex",
        f"{progname}.uf2",
        f"{progname}.factory.uf2",
        f"{progname}.zip",
        lfsbin
    ]
    for p in check_paths:
        f = env.File(env.subst(f"$BUILD_DIR/{p}"))
        if f.exists():
            d = {
                "name": p,
                "md5": f.get_content_hash(), # Returns MD5 hash
                "bytes": f.get_size() # Returns file size in bytes
            }
            out.append(d)
            print(d)
    manifest_write(out, env)

def manifest_write(files, env):
    manifest = {
        "version": verObj["long"],
        "build_epoch": build_epoch,
        "board": env.get("PIOENV"),
        "mcu": env.get("BOARD_MCU"),
        "repo": repo_owner,
        "files": files,
        "part": None,
        "has_mui": False,
        "has_inkhud": False,
    }
    # Get partition table (generated in esp32_pre.py) if it exists
    if env.get("custom_mtjson_part"):
        # custom_mtjson_part is a JSON string, convert it back to a dict
        pj = json.loads(env.get("custom_mtjson_part"))
        manifest["part"] = pj
    # Enable has_mui for TFT builds
    if ("HAS_TFT", 1) in env.get("CPPDEFINES", []):
        manifest["has_mui"] = True
    if "MESHTASTIC_INCLUDE_INKHUD" in env.get("CPPDEFINES", []):
        manifest["has_inkhud"] = True

    # Write the manifest to the build directory
    with open(env.subst("$BUILD_DIR/${PROGNAME}.mt.json"), "w") as f:
        json.dump(manifest, f, indent=2)

Import("projenv")

prefsLoc = projenv["PROJECT_DIR"] + "/version.properties"
verObj = readProps(prefsLoc)
print(f"Using meshtastic platformio-custom.py, firmware version {verObj['long']} on {env.get('PIOENV')}")

# get repository owner if git is installed
try:
    r_owner = (
        subprocess.check_output(["git", "config", "--get", "remote.origin.url"])
        .decode("utf-8")
        .strip().split("/")
    )
    repo_owner = r_owner[-2] + "/" + r_owner[-1].replace(".git", "")
except subprocess.CalledProcessError:
    repo_owner = "unknown"

jsonLoc = env["PROJECT_DIR"] + "/userPrefs.jsonc"
with open(jsonLoc) as f:
    jsonStr = re.sub("//.*","", f.read(), flags=re.MULTILINE)
    userPrefs = json.loads(jsonStr)

pref_flags = []
# Pre-process the userPrefs
for pref in userPrefs:
    if userPrefs[pref].startswith("{"):
        pref_flags.append("-D" + pref + "=" + userPrefs[pref])
    elif userPrefs[pref].lstrip("-").replace(".", "").isdigit():
        pref_flags.append("-D" + pref + "=" + userPrefs[pref])
    elif userPrefs[pref] == "true" or userPrefs[pref] == "false":
        pref_flags.append("-D" + pref + "=" + userPrefs[pref])
    elif userPrefs[pref].startswith("meshtastic_"):
        pref_flags.append("-D" + pref + "=" + userPrefs[pref])
    # If the value is a string, we need to wrap it in quotes
    else:
        pref_flags.append("-D" + pref + "=" + env.StringifyMacro(userPrefs[pref]) + "")

# General options that are passed to the C and C++ compilers
# Calculate unix epoch for current day (midnight)
current_date = datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)
build_epoch = int(current_date.timestamp())

flags = [
        "-DAPP_VERSION=" + verObj["long"],
        "-DAPP_VERSION_SHORT=" + verObj["short"],
        "-DAPP_ENV=" + env.get("PIOENV"),
        "-DAPP_REPO=" + repo_owner,
        "-DBUILD_EPOCH=" + str(build_epoch),
    ] + pref_flags

print("Using flags:")
for flag in flags:
    print(flag)

projenv.Append(
    CCFLAGS=flags,
)

for lb in env.GetLibBuilders():
    if lb.name == "meshtastic-device-ui":
        lb.env.Append(CPPDEFINES=[("APP_VERSION", verObj["long"])])
        break

# Get the display resolution from macros
def get_display_resolution(build_flags):
    # Check "DISPLAY_SIZE" to determine the screen resolution
    for flag in build_flags:
        if isinstance(flag, tuple) and flag[0] == "DISPLAY_SIZE":
            screen_width, screen_height = map(int, flag[1].split("x"))
            return screen_width, screen_height
    print("No screen resolution defined in build_flags. Please define DISPLAY_SIZE.")
    exit(1)

def load_boot_logo(source, target, env):
    build_flags = env.get("CPPDEFINES", [])
    logo_w, logo_h = get_display_resolution(build_flags)
    print(f"TFT build with {logo_w}x{logo_h} resolution detected")

    # Load the boot logo from `branding/logo_<width>x<height>.png` if it exists
    source_path = join(env["PROJECT_DIR"], "branding", f"logo_{logo_w}x{logo_h}.png")
    dest_dir = join(env["PROJECT_DIR"], "data", "boot")
    dest_path = join(dest_dir, "logo.png")
    if env.File(source_path).exists():
        print(f"Loading boot logo from {source_path}")
        # Prepare the destination
        env.Execute(f"mkdir -p {dest_dir} && rm -f {dest_path}")
        # Copy the logo to the `data/boot` directory
        env.Execute(f"cp {source_path} {dest_path}")

# Load the boot logo on TFT builds
if ("HAS_TFT", 1) in env.get("CPPDEFINES", []):
    env.AddPreAction(f"$BUILD_DIR/{lfsbin}", load_boot_logo)

mtjson_deps = ["buildprog"]
if platform.name == "espressif32":
    # Build littlefs image as part of mtjson target
    # Equivalent to `pio run -t buildfs`
    target_lfs = env.DataToBin(
        join("$BUILD_DIR", "${ESP32_FS_IMAGE_NAME}"), "$PROJECT_DATA_DIR"
    )
    mtjson_deps.append(target_lfs)

env.AddCustomTarget(
    name="mtjson",
    dependencies=mtjson_deps,
    actions=[manifest_gather],
    title="Meshtastic Manifest",
    description="Generating Meshtastic manifest JSON + Checksums",
    always_build=False,
)