import json
import os
import sys

import click
from idf_py_actions.errors import FatalError, NoSerialPortFoundError
from idf_py_actions.global_options import global_options
from idf_py_actions.tools import ensure_build_directory, get_sdkconfig_value, run_target, run_tool

PYTHON = sys.executable


def action_extensions(base_actions, project_path):
    def _get_default_serial_port(args):
        # Import is done here in order to move it after the check_environment() ensured that pyserial has been installed
        try:
            import serial.tools.list_ports
            esptool_path = os.path.join(os.environ['IDF_PATH'], 'components/esptool_py/esptool/')
            sys.path.insert(0, esptool_path)
            import esptool
            ports = list(sorted(p.device for p in serial.tools.list_ports.comports()))
            # high baud rate could cause the failure of creation of the connection
            esp = esptool.get_default_connected_device(serial_list=ports, port=None, connect_attempts=4,
                                                       initial_baud=115200)
            if esp is None:
                raise NoSerialPortFoundError(
                    "No serial ports found. Connect a device, or use '-p PORT' option to set a specific port.")

            serial_port = esp.serial_port
            esp._port.close()

            return serial_port
        except NoSerialPortFoundError:
            raise
        except Exception as e:
            raise FatalError('An exception occurred during detection of the serial port: {}'.format(e))

    def _get_esptool_args(args):
        esptool_path = os.path.join(os.environ['IDF_PATH'], 'components/esptool_py/esptool/esptool.py')
        if args.port is None:
            args.port = _get_default_serial_port(args)
        result = [PYTHON, esptool_path]
        result += ['-p', args.port]
        result += ['-b', str(args.baud)]

        with open(os.path.join(args.build_dir, 'flasher_args.json')) as f:
            flasher_args = json.load(f)

        extra_esptool_args = flasher_args['extra_esptool_args']
        result += ['--before', extra_esptool_args['before']]
        result += ['--after', extra_esptool_args['after']]
        result += ['--chip', extra_esptool_args['chip']]
        if not extra_esptool_args['stub']:
            result += ['--no-stub']
        return result

    def _get_commandline_options(ctx):
        """ Return all the command line options up to first action """
        # This approach ignores argument parsing done Click
        result = []

        for arg in sys.argv:
            if arg in ctx.command.commands_with_aliases:
                break

            result.append(arg)

        return result

    def monitor(action, ctx, args, print_filter, monitor_baud, encrypted):
        """
        Run idf_monitor.py to watch build output
        """

        desc_path = os.path.join(args.build_dir, 'project_description.json')
        if not os.path.exists(desc_path):
            ensure_build_directory(args, ctx.info_name)
        with open(desc_path, 'r') as f:
            project_desc = json.load(f)

        elf_file = os.path.join(args.build_dir, project_desc['app_elf'])
        if not os.path.exists(elf_file):
            raise FatalError("ELF file '%s' not found. You need to build & flash the project before running 'monitor', "
                             'and the binary on the device must match the one in the build directory exactly. '
                             "Try '%s flash monitor'." % (elf_file, ctx.info_name), ctx)
        idf_monitor = os.path.join(os.environ['IDF_PATH'], 'tools/idf_monitor.py')
        monitor_args = [PYTHON, idf_monitor]
        esp_port = args.port or _get_default_serial_port(args)
        monitor_args += ['-p', esp_port]

        if not monitor_baud:
            monitor_baud = os.getenv('IDF_MONITOR_BAUD') or os.getenv('MONITORBAUD') or project_desc['monitor_baud']

        monitor_args += ['-b', monitor_baud]
        monitor_args += ['--toolchain-prefix', project_desc['monitor_toolprefix']]

        coredump_decode = get_sdkconfig_value(project_desc['config_file'], 'CONFIG_ESP_COREDUMP_DECODE')
        if coredump_decode is not None:
            monitor_args += ['--decode-coredumps', coredump_decode]

        target_arch_riscv = get_sdkconfig_value(project_desc['config_file'], 'CONFIG_IDF_TARGET_ARCH_RISCV')
        if target_arch_riscv:
            monitor_args += ['--decode-panic', 'backtrace', '--target', project_desc['target']]

        if print_filter is not None:
            monitor_args += ['--print_filter', print_filter]
        monitor_args += [elf_file]

        if encrypted:
            monitor_args += ['--encrypted']

        idf_py = [PYTHON] + _get_commandline_options(ctx)  # commands to re-run idf.py
        monitor_args += ['-m', ' '.join("'%s'" % a for a in idf_py)]

        if 'MSYSTEM' in os.environ:
            monitor_args = ['winpty'] + monitor_args
        run_tool('idf_monitor', monitor_args, args.project_dir)

    def flash(action, ctx, args):
        """
        Run esptool to flash the entire project, from an argfile generated by the build system
        """
        ensure_build_directory(args, ctx.info_name)
        esp_port = args.port or _get_default_serial_port(args)
        run_target(action, args, {'ESPBAUD': str(args.baud),'ESPPORT': esp_port})

    def erase_flash(action, ctx, args):
        ensure_build_directory(args, ctx.info_name)
        esptool_args = _get_esptool_args(args)
        esptool_args += ['erase_flash']
        run_tool('esptool.py', esptool_args, args.build_dir)

    def global_callback(ctx, global_args, tasks):
        encryption = any([task.name in ('encrypted-flash', 'encrypted-app-flash') for task in tasks])
        if encryption:
            for task in tasks:
                if task.name == 'monitor':
                    task.action_args['encrypted'] = True
                    break

    def ota_targets(target_name, ctx, args):
        """
        Execute the target build system to build target 'target_name'.
        Additionally set global variables for baud and port.
        Calls ensure_build_directory() which will run cmake to generate a build
        directory (with the specified generator) as needed.
        """
        args.port = args.port or _get_default_serial_port(args)
        ensure_build_directory(args, ctx.info_name)
        run_target(target_name, args, {'ESPBAUD': str(args.baud), 'ESPPORT': args.port})

    baud_rate = {
        'names': ['-b', '--baud'],
        'help': 'Baud rate for flashing.',
        'scope': 'global',
        'envvar': 'ESPBAUD',
        'default': 460800,
    }

    port = {
        'names': ['-p', '--port'],
        'help': 'Serial port.',
        'scope': 'global',
        'envvar': 'ESPPORT',
        'default': None,
    }

    BAUD_AND_PORT = [baud_rate, port]
    serial_actions = {
        'global_action_callbacks': [global_callback],
        'actions': {
            'flash': {
                'callback': flash,
                'help': 'Flash the project.',
                'options': global_options + BAUD_AND_PORT,
                'order_dependencies': ['all', 'erase_flash'],
            },
            'erase_flash': {
                'callback': erase_flash,
                'help': 'Erase entire flash chip.',
                'options': BAUD_AND_PORT,
            },
            'monitor': {
                'callback':
                monitor,
                'help':
                'Display serial output.',
                'options': [
                    port, {
                        'names': ['--print-filter', '--print_filter'],
                        'help':
                        ('Filter monitor output. '
                         'Restrictions on what to print can be specified as a series of <tag>:<log_level> items '
                         'where <tag> is the tag string and <log_level> is a character from the set '
                         '{N, E, W, I, D, V, *} referring to a level. '
                         'For example, "tag1:W" matches and prints only the outputs written with '
                         'ESP_LOGW("tag1", ...) or at lower verbosity level, i.e. ESP_LOGE("tag1", ...). '
                         'Not specifying a <log_level> or using "*" defaults to Verbose level. '
                         'Please see the IDF Monitor section of the ESP-IDF documentation '
                         'for a more detailed description and further examples.'),
                        'default':
                        None,
                    }, {
                        'names': ['--monitor-baud', '-B'],
                        'type':
                        click.INT,
                        'help': ('Baud rate for monitor. '
                                 'If this option is not provided IDF_MONITOR_BAUD and MONITORBAUD '
                                 'environment variables and project_description.json in build directory '
                                 "(generated by CMake from project's sdkconfig) "
                                 'will be checked for default value.'),
                    }, {
                        'names': ['--encrypted', '-E'],
                        'is_flag': True,
                        'help': ('Enable encrypted flash targets. '
                                 'IDF Monitor will invoke encrypted-flash and encrypted-app-flash targets '
                                 'if this option is set. This option is set by default if IDF Monitor was invoked '
                                 'together with encrypted-flash or encrypted-app-flash target.'),
                    }
                ],
                'order_dependencies': [
                    'flash',
                    'encrypted-flash',
                    'partition_table-flash',
                    'bootloader-flash',
                    'app-flash',
                    'encrypted-app-flash',
                ],
            },
            'partition_table-flash': {
                'callback': flash,
                'help': 'Flash partition table only.',
                'options': BAUD_AND_PORT,
                'order_dependencies': ['partition_table', 'erase_flash'],
            },
            'bootloader-flash': {
                'callback': flash,
                'help': 'Flash bootloader only.',
                'options': BAUD_AND_PORT,
                'order_dependencies': ['bootloader', 'erase_flash'],
            },
            'app-flash': {
                'callback': flash,
                'help': 'Flash the app only.',
                'options': BAUD_AND_PORT,
                'order_dependencies': ['app', 'erase_flash'],
            },
            'encrypted-app-flash': {
                'callback': flash,
                'help': 'Flash the encrypted app only.',
                'order_dependencies': ['app', 'erase_flash'],
            },
            'encrypted-flash': {
                'callback': flash,
                'help': 'Flash the encrypted project.',
                'order_dependencies': ['all', 'erase_flash'],
            },
            'erase_otadata': {
                'callback': ota_targets,
                'help': 'Erase otadata partition.',
                'options': global_options + BAUD_AND_PORT,
            },
            'read_otadata': {
                'callback': ota_targets,
                'help': 'Read otadata partition.',
                'options': global_options + BAUD_AND_PORT,
            },
        },
    }

    return serial_actions