fix async

doc/cp.txt

@@ -290,6 +290,10 @@ Usage examples: >
                                 for multi-test case problems commonly found
                                 in contests.
 
+                                AtCoder Heuristic Contests (AHC) are excluded
+                                from the contest list as they don't have
+                                standard sample test cases.
+
 Codeforces ~
                                                           *cp-codeforces*
 URL format: https://codeforces.com/contest/1234/problem/A

lua/cp/pickers/fzf_lua.lua

@@ -8,9 +8,13 @@ local function problem_picker(platform, contest_id)
 
   if #problems == 0 then
     vim.notify(
-      ('No problems found for contest: %s %s'):format(platform_display_name, contest_id),
+      ("Contest %s %s hasn't started yet or has no available problems"):format(
+        platform_display_name,
+        contest_id
+      ),
       vim.log.levels.WARN
     )
+    contest_picker(platform)
     return
   end
 

lua/cp/pickers/init.lua

@@ -59,6 +59,8 @@ local function get_contests_for_platform(platform)
     'contests',
   }
 
+  logger.progress(('running: %s'):format(table.concat(cmd, ' ')))
+
   local result = vim
     .system(cmd, {
       cwd = plugin_path,
@@ -67,6 +69,11 @@ local function get_contests_for_platform(platform)
     })
     :wait()
 
+  logger.progress(('exit code: %d, stdout length: %d'):format(result.code, #(result.stdout or '')))
+  if result.stderr and #result.stderr > 0 then
+    logger.progress(('stderr: %s'):format(result.stderr:sub(1, 200)))
+  end
+
   if result.code ~= 0 then
     logger.log(
       ('Failed to load contests: %s'):format(result.stderr or 'unknown error'),
@@ -75,9 +82,18 @@ local function get_contests_for_platform(platform)
     return {}
   end
 
+  logger.progress(('stdout preview: %s'):format(result.stdout:sub(1, 100)))
+
   local ok, data = pcall(vim.json.decode, result.stdout)
-  if not ok or not data.success then
+  if not ok then
-    logger.log('Failed to parse contest data', vim.log.levels.ERROR)
+    logger.log(('JSON parse error: %s'):format(tostring(data)), vim.log.levels.ERROR)
+    return {}
+  end
+  if not data.success then
+    logger.log(
+      ('Scraper returned success=false: %s'):format(data.error or 'no error message'),
+      vim.log.levels.ERROR
+    )
     return {}
   end
 
@@ -151,10 +167,14 @@ local function get_problems_for_contest(platform, contest_id)
   end
 
   local ok, data = pcall(vim.json.decode, result.stdout)
-  if not ok or not data.success then
+  if not ok then
     logger.log('Failed to parse contest data', vim.log.levels.ERROR)
     return problems
   end
+  if not data.success then
+    logger.log(data.error or 'Contest scraping failed', vim.log.levels.ERROR)
+    return problems
+  end
 
   if not data.problems or #data.problems == 0 then
     logger.log('Contest has no problems available', vim.log.levels.WARN)

lua/cp/pickers/telescope.lua

@@ -13,9 +13,13 @@ local function problem_picker(opts, platform, contest_id)
 
   if #problems == 0 then
     vim.notify(
-      ('No problems found for contest: %s %s'):format(platform_display_name, contest_id),
+      ("Contest %s %s hasn't started yet or has no available problems"):format(
+        platform_display_name,
+        contest_id
+      ),
       vim.log.levels.WARN
     )
+    contest_picker(opts, platform)
     return
   end
 

scrapers/__init__.py

@@ -1,15 +1,45 @@
-from .atcoder import AtCoderScraper
+# Lazy imports to avoid module loading conflicts when running scrapers with -m
-from .base import BaseScraper, ScraperConfig
+def __getattr__(name):
-from .codeforces import CodeforcesScraper
+    if name == "AtCoderScraper":
-from .cses import CSESScraper
+        from .atcoder import AtCoderScraper
-from .models import (
+
-    ContestListResult,
+        return AtCoderScraper
-    ContestSummary,
+    elif name == "BaseScraper":
-    MetadataResult,
+        from .base import BaseScraper
-    ProblemSummary,
+
-    TestCase,
+        return BaseScraper
-    TestsResult,
+    elif name == "ScraperConfig":
-)
+        from .base import ScraperConfig
+
+        return ScraperConfig
+    elif name == "CodeforcesScraper":
+        from .codeforces import CodeforcesScraper
+
+        return CodeforcesScraper
+    elif name == "CSESScraper":
+        from .cses import CSESScraper
+
+        return CSESScraper
+    elif name in [
+        "ContestListResult",
+        "ContestSummary",
+        "MetadataResult",
+        "ProblemSummary",
+        "TestCase",
+        "TestsResult",
+    ]:
+        from .models import (
+            ContestListResult,
+            ContestSummary,
+            MetadataResult,
+            ProblemSummary,
+            TestCase,
+            TestsResult,
+        )
+
+        return locals()[name]
+    raise AttributeError(f"module 'scrapers' has no attribute '{name}'")
+
 
 __all__ = [
     "AtCoderScraper",

scrapers/atcoder.py

@@ -272,7 +272,11 @@ def scrape_contests() -> list[ContestSummary]:
                 r"[\uff01-\uff5e]", lambda m: chr(ord(m.group()) - 0xFEE0), name
             )
 
-            contests.append(ContestSummary(id=contest_id, name=name, display_name=name))
+            # Skip AtCoder Heuristic Contests (AHC) as they don't have standard sample tests
+            if not contest_id.startswith("ahc"):
+                contests.append(
+                    ContestSummary(id=contest_id, name=name, display_name=name)
+                )
 
         return contests
 

tests/scrapers/test_atcoder.py

@@ -129,3 +129,71 @@ def test_scrape_contests_network_error(mocker):
     result = scrape_contests()
 
     assert result == []
+
+
+def test_scrape_contests_filters_ahc(mocker):
+    def mock_get_side_effect(url, **kwargs):
+        if url == "https://atcoder.jp/contests/archive":
+            mock_response = Mock()
+            mock_response.raise_for_status.return_value = None
+            mock_response.text = """
+            <html>
+                <ul class="pagination">
+                    <li>1</li>
+                </ul>
+            </html>
+            """
+            return mock_response
+        elif "page=1" in url:
+            mock_response = Mock()
+            mock_response.raise_for_status.return_value = None
+            mock_response.text = """
+            <table class="table">
+                <tbody>
+                    <tr>
+                        <td>2025-01-15 21:00:00+0900</td>
+                        <td><a href="/contests/abc350">AtCoder Beginner Contest 350</a></td>
+                        <td>01:40</td>
+                        <td> - 1999</td>
+                    </tr>
+                    <tr>
+                        <td>2025-01-14 21:00:00+0900</td>
+                        <td><a href="/contests/ahc044">AtCoder Heuristic Contest 044</a></td>
+                        <td>05:00</td>
+                        <td>-</td>
+                    </tr>
+                    <tr>
+                        <td>2025-01-13 21:00:00+0900</td>
+                        <td><a href="/contests/arc170">AtCoder Regular Contest 170</a></td>
+                        <td>02:00</td>
+                        <td>1000 - 2799</td>
+                    </tr>
+                </tbody>
+            </table>
+            """
+            return mock_response
+        else:
+            mock_response = Mock()
+            mock_response.raise_for_status.return_value = None
+            mock_response.text = "<html></html>"
+            return mock_response
+
+    mocker.patch("scrapers.atcoder.requests.get", side_effect=mock_get_side_effect)
+
+    result = scrape_contests()
+
+    assert len(result) == 2
+    assert result[0] == ContestSummary(
+        id="abc350",
+        name="AtCoder Beginner Contest 350",
+        display_name="AtCoder Beginner Contest 350",
+    )
+    assert result[1] == ContestSummary(
+        id="arc170",
+        name="AtCoder Regular Contest 170",
+        display_name="AtCoder Regular Contest 170",
+    )
+
+    # Ensure ahc044 is filtered out
+    contest_ids = [contest.id for contest in result]
+    assert "ahc044" not in contest_ids

tests/scrapers/test_interface_compliance.py

@@ -8,9 +8,9 @@ from scrapers.base import BaseScraper
 from scrapers.models import ContestListResult, MetadataResult, TestsResult
 
 SCRAPERS = [
-    cls
+    scrapers.AtCoderScraper,
-    for name, cls in inspect.getmembers(scrapers, inspect.isclass)
+    scrapers.CodeforcesScraper,
-    if issubclass(cls, BaseScraper) and cls != BaseScraper
+    scrapers.CSESScraper,
 ]