"""Step definitions for devcontainer_handler.feature.

Tests devcontainer resource registration, auto-discovery, handler
protocol conformance, and resource type registry integration.
"""

from __future__ import annotations

import json
import tempfile
from pathlib import Path

from behave import given, then, when
from behave.runner import Context

from cleveragents.domain.models.core.resource_type import ResourceTypeSpec
from cleveragents.resource.handlers.devcontainer import DevcontainerHandler
from cleveragents.resource.handlers.discovery import (
    DevcontainerDiscoveryResult,
    discover_devcontainers,
    is_trigger_type,
)
from cleveragents.resource.handlers.protocol import ResourceHandler

_VALID_DC_JSON: str = json.dumps(
    {"name": "test-devcontainer", "image": "ubuntu:latest"}
)


# ── Given steps ──────────────────────────────────────────────


@given("a temporary directory with a valid devcontainer.json")
def step_tmp_dir_valid_dc(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    tmp = Path(context.tmp_dir_obj.name)
    dc_dir = tmp / ".devcontainer"
    dc_dir.mkdir()
    (dc_dir / "devcontainer.json").write_text(_VALID_DC_JSON, encoding="utf-8")
    context.tmp_path = str(tmp)


@given("a temporary directory simulating a git checkout")
def step_tmp_dir_git(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    context.tmp_path = context.tmp_dir_obj.name


@given("a temporary directory simulating a filesystem mount")
def step_tmp_dir_fs(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    context.tmp_path = context.tmp_dir_obj.name


@given("the directory has a .devcontainer/devcontainer.json file")
def step_add_dc_subdir(context: Context) -> None:
    tmp = Path(context.tmp_path)
    dc_dir = tmp / ".devcontainer"
    dc_dir.mkdir(exist_ok=True)
    (dc_dir / "devcontainer.json").write_text(_VALID_DC_JSON, encoding="utf-8")


@given("the directory has a root .devcontainer.json file")
def step_add_dc_root(context: Context) -> None:
    tmp = Path(context.tmp_path)
    (tmp / ".devcontainer.json").write_text(_VALID_DC_JSON, encoding="utf-8")


@given("a temporary directory with an invalid devcontainer.json")
def step_tmp_dir_invalid_dc(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    tmp = Path(context.tmp_dir_obj.name)
    dc_dir = tmp / ".devcontainer"
    dc_dir.mkdir()
    (dc_dir / "devcontainer.json").write_text("not valid json {{", encoding="utf-8")
    context.tmp_path = str(tmp)


@given("a temporary directory with a non-object devcontainer.json")
def step_tmp_dir_nonobj_dc(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    tmp = Path(context.tmp_dir_obj.name)
    dc_dir = tmp / ".devcontainer"
    dc_dir.mkdir()
    (dc_dir / "devcontainer.json").write_text(
        '["not", "an", "object"]', encoding="utf-8"
    )
    context.tmp_path = str(tmp)


@given("a temporary directory with no devcontainer configuration")
def step_tmp_dir_no_dc(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    context.tmp_path = context.tmp_dir_obj.name


@given("the built-in resource type registry")
def step_builtin_registry(context: Context) -> None:
    context.builtin_names = ResourceTypeSpec.BUILTIN_NAMES


# ── When steps ───────────────────────────────────────────────


@when("I create a devcontainer-instance resource at that path")
def step_create_dc_resource(context: Context) -> None:
    # Verify the type is actually recognised by the built-in registry
    # instead of just assigning a string and asserting it back (U7).
    context.resource_type = "devcontainer-instance"
    assert context.resource_type in ResourceTypeSpec.BUILTIN_NAMES, (
        f"'{context.resource_type}' is not a built-in resource type"
    )
    # Verify discovery finds the devcontainer in our temp directory
    results = discover_devcontainers(
        resource_location=context.tmp_path,
        resource_type="git-checkout",
    )
    assert len(results) > 0, "Expected at least one discovery result"
    context.resource_id = f"01TEST{results[0].config_path.name}"
    context.resource_created = True


@when('I create a container-instance resource with image "{image}"')
def step_create_ctr_resource(context: Context, image: str) -> None:
    # Verify the type is actually recognised by the built-in registry
    # instead of just assigning a string and asserting it back (U7).
    context.container_type = "container-instance"
    assert context.container_type in ResourceTypeSpec.BUILTIN_NAMES, (
        f"'{context.container_type}' is not a built-in resource type"
    )
    context.container_image = image
    context.container_created = True


@when('I run devcontainer discovery on the directory as "{rtype}"')
def step_run_discovery(context: Context, rtype: str) -> None:
    context.discovery_results = discover_devcontainers(
        resource_location=context.tmp_path,
        resource_type=rtype,
    )


@when("I list all built-in type names")
def step_list_builtin_names(context: Context) -> None:
    context.type_name_list = sorted(context.builtin_names)


@when("I instantiate DevcontainerHandler")
def step_instantiate_handler(context: Context) -> None:
    context.handler = DevcontainerHandler()


@when("I create a discovery result with valid parameters")
def step_create_valid_result(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    tmp = Path(context.tmp_dir_obj.name)
    dc_file = tmp / "devcontainer.json"
    dc_file.write_text(_VALID_DC_JSON, encoding="utf-8")
    context.discovery_result = DevcontainerDiscoveryResult(
        config_path=dc_file,
        config_data=json.loads(_VALID_DC_JSON),
        parent_location=str(tmp),
    )


@when("I create a discovery result with empty parent_location")
def step_create_invalid_result(context: Context) -> None:
    context.tmp_dir_obj = tempfile.TemporaryDirectory()
    tmp = Path(context.tmp_dir_obj.name)
    dc_file = tmp / "devcontainer.json"
    dc_file.write_text(_VALID_DC_JSON, encoding="utf-8")
    context.result_error = None
    try:
        DevcontainerDiscoveryResult(
            config_path=dc_file,
            config_data=json.loads(_VALID_DC_JSON),
            parent_location="",
        )
    except ValueError as exc:
        context.result_error = exc


# ── Then steps ───────────────────────────────────────────────


@then('the resource should have type "{expected_type}"')
def step_check_resource_type(context: Context, expected_type: str) -> None:
    assert context.resource_type == expected_type


@then("the resource should have a non-empty resource_id")
def step_check_resource_id(context: Context) -> None:
    assert context.resource_id
    assert len(context.resource_id) > 0


@then('the container resource should have type "{expected_type}"')
def step_check_container_type(context: Context, expected_type: str) -> None:
    assert context.container_type == expected_type


@then("discovery should return {count:d} result")
def step_check_discovery_count_singular(context: Context, count: int) -> None:
    assert len(context.discovery_results) == count


@then("discovery should return {count:d} results")
def step_check_discovery_count_plural(context: Context, count: int) -> None:
    assert len(context.discovery_results) == count


@then('the discovered config path should end with "{suffix}"')
def step_check_config_path_suffix(context: Context, suffix: str) -> None:
    assert len(context.discovery_results) > 0
    result = context.discovery_results[0]
    assert str(result.config_path).endswith(suffix)


@then('the type list should contain "{type_name}"')
def step_check_type_in_list(context: Context, type_name: str) -> None:
    assert type_name in context.builtin_names


@then("it should satisfy the ResourceHandler protocol")
def step_check_protocol(context: Context) -> None:
    assert isinstance(context.handler, ResourceHandler)


@then('its default strategy should be "{strategy}"')
def step_check_default_strategy(context: Context, strategy: str) -> None:
    assert context.handler._default_strategy.value == strategy


@then('its type label should be "{label}"')
def step_check_type_label(context: Context, label: str) -> None:
    assert context.handler._type_label == label


@then("the result should have a config_path attribute")
def step_check_result_attr(context: Context) -> None:
    assert hasattr(context.discovery_result, "config_path")
    assert context.discovery_result.config_path is not None


@then("it should raise a ValueError")
def step_check_value_error(context: Context) -> None:
    assert context.result_error is not None
    assert isinstance(context.result_error, ValueError)


@then('"{rtype}" should be a trigger type')
def step_check_is_trigger(context: Context, rtype: str) -> None:
    assert is_trigger_type(rtype) is True


@then('"{rtype}" should not be a trigger type')
def step_check_not_trigger(context: Context, rtype: str) -> None:
    assert is_trigger_type(rtype) is False


# ── Given steps for named configurations ─────────────────────


@given('the directory has a named devcontainer configuration "{name}"')
def step_add_named_dc(context: Context, name: str) -> None:
    tmp = Path(context.tmp_path)
    named_dir = tmp / ".devcontainer" / name
    named_dir.mkdir(parents=True, exist_ok=True)
    (named_dir / "devcontainer.json").write_text(_VALID_DC_JSON, encoding="utf-8")


@given(
    'the directory has a named devcontainer configuration "{name}" with invalid JSON'
)
def step_add_named_dc_invalid(context: Context, name: str) -> None:
    tmp = Path(context.tmp_path)
    named_dir = tmp / ".devcontainer" / name
    named_dir.mkdir(parents=True, exist_ok=True)
    (named_dir / "devcontainer.json").write_text("not valid json {{", encoding="utf-8")


@given("the directory has an empty .devcontainer directory")
def step_add_empty_dc_dir(context: Context) -> None:
    tmp = Path(context.tmp_path)
    dc_dir = tmp / ".devcontainer"
    dc_dir.mkdir(exist_ok=True)


# ── Then steps for named configurations ──────────────────────


@then('the first result should have config name "{name}"')
def step_check_first_result_config_name(context: Context, name: str) -> None:
    assert len(context.discovery_results) > 0
    result = context.discovery_results[0]
    assert result.config_name == name, (
        f"Expected config_name={name!r}, got {result.config_name!r}"
    )


@then("the first result should have no config name")
def step_check_first_result_no_config_name(context: Context) -> None:
    assert len(context.discovery_results) > 0
    result = context.discovery_results[0]
    assert result.config_name is None, (
        f"Expected config_name=None, got {result.config_name!r}"
    )


@then('the result config names should include "{name}"')
def step_check_result_config_names_include(context: Context, name: str) -> None:
    names = {r.config_name for r in context.discovery_results}
    assert name in names, f"Expected {name!r} in config names, got {names!r}"