"""Step definitions for CONC3 cleanup CLI commands and edge cases.

Exercises the Typer CLI commands (scan, purge, status) and
service-level edge cases for coverage.
"""

from __future__ import annotations

import os
import tempfile
import time
from pathlib import Path

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

from cleveragents.application.services.cleanup_service import (
    CleanupReport,
    CleanupService,
)
from cleveragents.config.settings import Settings

# ── Helpers ───────────────────────────────────────────────────────


def _make_settings(**overrides: object) -> Settings:
    """Create a Settings instance with optional field overrides.

    Uses ``model_copy(update=...)`` so that Pydantic validators
    (including ``ge=`` bounds on retention fields) are enforced.
    """
    Settings._instance = None
    base = Settings()
    if overrides:
        return base.model_copy(update=overrides)
    return base


def _create_sandbox_dir(
    prefix: str = "ca-sandbox-testplan-",
    age_hours: float = 72,
) -> Path:
    """Create a fake sandbox temp directory with a given age."""
    d = Path(tempfile.mkdtemp(prefix=prefix))
    old_time = time.time() - (age_hours * 3600)
    os.utime(d, (old_time, old_time))
    return d


# ── CLI command tests ─────────────────────────────────────────────


@given("a cleanup CLI runner")
def step_cli_runner(context: Context) -> None:
    from typer.testing import CliRunner

    context.cli_runner = CliRunner()


@given("a stale sandbox for CLI testing")
def step_stale_sandbox_cli(context: Context) -> None:
    import shutil

    context.cli_sandbox_dir = _create_sandbox_dir(age_hours=72)

    if not hasattr(context, "_temp_paths"):
        context._temp_paths = []
    context._temp_paths.append(context.cli_sandbox_dir)

    def _cleanup() -> None:
        for p in getattr(context, "_temp_paths", []):
            if p.exists():
                if p.is_dir():
                    shutil.rmtree(p, ignore_errors=True)
                else:
                    p.unlink(missing_ok=True)

    if _cleanup not in context._cleanup_handlers:
        context._cleanup_handlers.append(_cleanup)


@when("I invoke the cleanup scan command")
def step_invoke_scan(context: Context) -> None:
    from cleveragents.cli.commands.cleanup import app as cleanup_app

    context.cli_result = context.cli_runner.invoke(cleanup_app, ["scan"])


@when("I invoke the cleanup purge command with dry-run")
def step_invoke_purge_dry(context: Context) -> None:
    from cleveragents.cli.commands.cleanup import app as cleanup_app

    context.cli_result = context.cli_runner.invoke(cleanup_app, ["purge", "--dry-run"])


@when("I invoke the cleanup purge command with yes flag")
def step_invoke_purge_yes(context: Context) -> None:
    from cleveragents.cli.commands.cleanup import app as cleanup_app

    context.cli_result = context.cli_runner.invoke(cleanup_app, ["purge", "--yes"])


@when("I invoke the cleanup purge command with all and yes")
def step_invoke_purge_all_yes(context: Context) -> None:
    from cleveragents.cli.commands.cleanup import app as cleanup_app

    context.cli_result = context.cli_runner.invoke(
        cleanup_app, ["purge", "--all", "--yes"]
    )


@when("I invoke the cleanup status command")
def step_invoke_status(context: Context) -> None:
    from cleveragents.cli.commands.cleanup import app as cleanup_app

    context.cli_result = context.cli_runner.invoke(cleanup_app, ["status"])


@when("I invoke the cleanup purge command without confirmation")
def step_invoke_purge_no_confirm(context: Context) -> None:
    from cleveragents.cli.commands.cleanup import app as cleanup_app

    context.cli_result = context.cli_runner.invoke(cleanup_app, ["purge"], input="n\n")


@then("the CLI exit code should be {code:d}")
def step_cli_exit_code(context: Context, code: int) -> None:
    assert context.cli_result.exit_code == code, (
        f"Expected exit code {code}, got {context.cli_result.exit_code}. "
        f"Output: {context.cli_result.output}"
    )


@then('the cleanup CLI output should contain "{text}"')
def step_cleanup_cli_output_contains(context: Context, text: str) -> None:
    assert text in context.cli_result.output, (
        f"Expected '{text}' in output, got: {context.cli_result.output}"
    )


# ── CleanupReport and CleanupService edge case tests ─────────────


@when("I create a cleanup report with known values")
def step_create_report(context: Context) -> None:
    report = CleanupReport(dry_run=True)
    report.sandboxes.scanned = 5
    report.sandboxes.removed = 2
    report.checkpoints.scanned = 100
    context.report_dict = report.as_dict()


@then('the report dict should contain key "{key}"')
def step_report_dict_key(context: Context, key: str) -> None:
    assert key in context.report_dict, (
        f"Expected key '{key}' in report dict, got: {list(context.report_dict.keys())}"
    )


@when("I create a cleanup service with invalid settings")
def step_invalid_settings(context: Context) -> None:
    try:
        CleanupService(settings="not-a-settings")  # type: ignore[arg-type]
        context.type_error_raised = False
    except TypeError:
        context.type_error_raised = True


@then("a TypeError should be raised")
def step_type_error(context: Context) -> None:
    assert context.type_error_raised, "Expected TypeError to be raised"


@given("a cleanup service for age description testing")
def step_age_service(context: Context) -> None:
    context.settings = _make_settings()
    context.service = CleanupService(
        settings=context.settings,
        active_plan_ids=frozenset(),
    )


@when("I check the age description for a {hours:d} hour old file")
def step_age_hours(context: Context, hours: int) -> None:
    tmp = Path(tempfile.mktemp(prefix="ca-age-test-"))
    tmp.write_text("test")
    old_time = time.time() - (hours * 3600)
    os.utime(tmp, (old_time, old_time))
    context.age_desc = CleanupService._age_description(tmp)
    tmp.unlink()


@when("I check the age description for a {minutes:d} minute old file")
def step_age_minutes(context: Context, minutes: int) -> None:
    tmp = Path(tempfile.mktemp(prefix="ca-age-test-"))
    tmp.write_text("test")
    old_time = time.time() - (minutes * 60)
    os.utime(tmp, (old_time, old_time))
    context.age_desc = CleanupService._age_description(tmp)
    tmp.unlink()


@when("I check the age description for a {days:d} day old file")
def step_age_days(context: Context, days: int) -> None:
    tmp = Path(tempfile.mktemp(prefix="ca-age-test-"))
    tmp.write_text("test")
    old_time = time.time() - (days * 86400)
    os.utime(tmp, (old_time, old_time))
    context.age_desc = CleanupService._age_description(tmp)
    tmp.unlink()


@then('the age description should contain "{text}"')
def step_age_contains(context: Context, text: str) -> None:
    assert text in context.age_desc, (
        f"Expected '{text}' in age description, got: {context.age_desc}"
    )


# ── Full scan/purge integration via service ──────────────────────


@when("I run a full scan")
def step_full_scan(context: Context) -> None:
    context.report = context.service.scan()


@then("the report should contain log stale items")
def step_log_stale_items(context: Context) -> None:
    log_items = [i for i in context.report.stale_items if i.resource_type == "log"]
    assert len(log_items) >= 1, f"Expected >= 1 log stale item, found {len(log_items)}"


@then("the report should contain backup stale items")
def step_backup_stale_items(context: Context) -> None:
    backup_items = [
        i for i in context.report.stale_items if i.resource_type == "backup"
    ]
    assert len(backup_items) >= 1, (
        f"Expected >= 1 backup stale item, found {len(backup_items)}"
    )


@when("I run purge all")
def step_run_purge_all(context: Context) -> None:
    context.report = context.service.purge(purge_all=True)


@then("the backup file should be removed")
def step_backup_removed(context: Context) -> None:
    assert not context.backup_file.exists(), (
        f"Backup file {context.backup_file} still exists"
    )


@when("I run a full checkpoint scan")
def step_full_checkpoint_scan(context: Context) -> None:
    context.service._get_checkpoint_base_dir = lambda: context.checkpoint_dir.parent
    plan_dir = context.checkpoint_dir.parent / "test-plan"
    if not plan_dir.exists():
        context.checkpoint_dir.rename(plan_dir)
        context.checkpoint_dir = plan_dir
        context.service._get_checkpoint_base_dir = lambda: plan_dir.parent
    context.report = context.service.scan()


@then("the report should contain checkpoint stale items")
def step_checkpoint_stale_items(context: Context) -> None:
    cp_items = [
        i for i in context.report.stale_items if i.resource_type == "checkpoint"
    ]
    assert len(cp_items) >= 1, (
        f"Expected >= 1 checkpoint stale item, found {len(cp_items)}"
    )


@when("I run purge for checkpoints")
def step_purge_checkpoints_full(context: Context) -> None:
    plan_dir = context.checkpoint_dir
    context.service._get_checkpoint_base_dir = lambda: plan_dir.parent
    target = plan_dir.parent / "test-plan-purge"
    if not target.exists():
        plan_dir.rename(target)
        context.checkpoint_dir = target
        context.service._get_checkpoint_base_dir = lambda: target.parent
    context.report = context.service.purge()


@then("the report should show checkpoints removed")
def step_checkpoints_removed_report(context: Context) -> None:
    assert context.report.checkpoints.removed >= 1, (
        f"Expected >= 1 checkpoint removed, got {context.report.checkpoints.removed}"
    )