feat(providers): add balldontlie http adapter with backend selection

.env.example

@@ -29,10 +29,21 @@ AUTO_COLLECTSTATIC=1
 GUNICORN_WORKERS=3
 
 # Providers / ingestion
-PROVIDER_DEFAULT_NAMESPACE=mvp_demo
+PROVIDER_BACKEND=demo
+PROVIDER_NAMESPACE_DEMO=mvp_demo
+PROVIDER_NAMESPACE_BALLDONTLIE=balldontlie
+PROVIDER_DEFAULT_NAMESPACE=
 PROVIDER_MVP_DATA_FILE=/app/apps/providers/data/mvp_provider.json
 PROVIDER_REQUEST_RETRIES=3
 PROVIDER_REQUEST_RETRY_SLEEP=1
+PROVIDER_HTTP_TIMEOUT_SECONDS=10
+PROVIDER_BALLDONTLIE_BASE_URL=https://api.balldontlie.io/v1
+PROVIDER_BALLDONTLIE_API_KEY=
+PROVIDER_BALLDONTLIE_SEASONS=2024
+PROVIDER_BALLDONTLIE_PLAYERS_PAGE_LIMIT=5
+PROVIDER_BALLDONTLIE_PLAYERS_PER_PAGE=100
+PROVIDER_BALLDONTLIE_STATS_PAGE_LIMIT=10
+PROVIDER_BALLDONTLIE_STATS_PER_PAGE=100
 CELERY_TASK_TIME_LIMIT=1800
 CELERY_TASK_SOFT_TIME_LIMIT=1500
 API_THROTTLE_ANON=100/hour

README.md

@@ -155,8 +155,8 @@ Default auth routes:
 
 - Open `/admin/` -> `IngestionRun`
 - Use admin actions:
-  - `Queue full MVP sync`
+  - `Queue full sync (default provider)`
-  - `Queue incremental MVP sync`
+  - `Queue incremental sync (default provider)`
   - `Retry selected ingestion runs`
 
 ### Trigger from shell (manual)
@@ -167,7 +167,7 @@ docker compose exec web python manage.py shell
 
 ```python
 from apps.ingestion.tasks import trigger_full_sync
-trigger_full_sync.delay(provider_namespace="mvp_demo")
+trigger_full_sync.delay(provider_namespace="balldontlie")
 ```
 
 ### Logs and diagnostics
@@ -176,6 +176,16 @@ trigger_full_sync.delay(provider_namespace="mvp_demo")
 - Structured error records: `IngestionError`
 - Provider entity mappings + diagnostic payload snippets: `ExternalMapping`
 
+## Provider Backend Selection
+
+Provider backend is selected via environment variables:
+
+- `PROVIDER_BACKEND=demo` uses the local JSON fixture adapter (`mvp_demo`)
+- `PROVIDER_BACKEND=balldontlie` uses the HTTP adapter (`balldontlie`)
+- `PROVIDER_DEFAULT_NAMESPACE` can override backend mapping explicitly
+
+The balldontlie adapter is NBA-centric and intended as MVP ingestion only. The provider abstraction remains ready for future multi-league providers (for example Sportradar or FIBA GDAP).
+
 ## GitFlow Workflow
 
 GitFlow is required in this repository:

apps/ingestion/admin.py

@@ -1,6 +1,8 @@
 from django.contrib import admin
 from django.contrib import messages
 
+from apps.providers.registry import get_default_provider_namespace
+
 from .models import IngestionError, IngestionRun
 from .tasks import trigger_full_sync, trigger_incremental_sync
 
@@ -41,20 +43,22 @@ class IngestionRunAdmin(admin.ModelAdmin):
         "created_at",
     )
     actions = (
-        "enqueue_full_sync_mvp",
+        "enqueue_full_sync_default_provider",
-        "enqueue_incremental_sync_mvp",
+        "enqueue_incremental_sync_default_provider",
         "retry_selected_runs",
     )
 
-    @admin.action(description="Queue full MVP sync")
+    @admin.action(description="Queue full sync (default provider)")
-    def enqueue_full_sync_mvp(self, request, queryset):
+    def enqueue_full_sync_default_provider(self, request, queryset):
-        trigger_full_sync.delay(provider_namespace="mvp_demo", triggered_by_id=request.user.id)
+        provider_namespace = get_default_provider_namespace()
-        self.message_user(request, "Queued full MVP sync task.", level=messages.SUCCESS)
+        trigger_full_sync.delay(provider_namespace=provider_namespace, triggered_by_id=request.user.id)
+        self.message_user(request, f"Queued full sync task for {provider_namespace}.", level=messages.SUCCESS)
 
-    @admin.action(description="Queue incremental MVP sync")
+    @admin.action(description="Queue incremental sync (default provider)")
-    def enqueue_incremental_sync_mvp(self, request, queryset):
+    def enqueue_incremental_sync_default_provider(self, request, queryset):
-        trigger_incremental_sync.delay(provider_namespace="mvp_demo", triggered_by_id=request.user.id)
+        provider_namespace = get_default_provider_namespace()
-        self.message_user(request, "Queued incremental MVP sync task.", level=messages.SUCCESS)
+        trigger_incremental_sync.delay(provider_namespace=provider_namespace, triggered_by_id=request.user.id)
+        self.message_user(request, f"Queued incremental sync task for {provider_namespace}.", level=messages.SUCCESS)
 
     @admin.action(description="Retry selected ingestion runs")
     def retry_selected_runs(self, request, queryset):

apps/providers/adapters/balldontlie_provider.py

@@ -0,0 +1,147 @@
+import logging
+
+from django.conf import settings
+
+from apps.providers.clients import BalldontlieClient
+from apps.providers.interfaces import BaseProviderAdapter
+from apps.providers.services.balldontlie_mappings import (
+    map_competitions,
+    map_player_stats,
+    map_players,
+    map_seasons,
+    map_teams,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class BalldontlieProviderAdapter(BaseProviderAdapter):
+    """HTTP MVP adapter for balldontlie (NBA-centric data source)."""
+
+    namespace = "balldontlie"
+
+    def __init__(self, client: BalldontlieClient | None = None):
+        self.client = client or BalldontlieClient()
+
+    @property
+    def configured_seasons(self) -> list[int]:
+        return settings.PROVIDER_BALLDONTLIE_SEASONS
+
+    def search_players(self, *, query: str = "", limit: int = 50, offset: int = 0) -> list[dict]:
+        params = {"search": query} if query else None
+        rows = self.client.list_paginated(
+            "players",
+            params=params,
+            per_page=min(limit, settings.PROVIDER_BALLDONTLIE_PLAYERS_PER_PAGE),
+            page_limit=1,
+        )
+        mapped = map_players(rows)
+        return mapped[offset : offset + limit]
+
+    def fetch_player(self, *, external_player_id: str) -> dict | None:
+        if not external_player_id.startswith("player-"):
+            return None
+        player_id = external_player_id.replace("player-", "", 1)
+        payload = self.client.get_json(f"players/{player_id}")
+        data = payload.get("data")
+        if not isinstance(data, dict):
+            return None
+        mapped = map_players([data])
+        return mapped[0] if mapped else None
+
+    def fetch_players(self) -> list[dict]:
+        rows = self.client.list_paginated(
+            "players",
+            per_page=settings.PROVIDER_BALLDONTLIE_PLAYERS_PER_PAGE,
+            page_limit=settings.PROVIDER_BALLDONTLIE_PLAYERS_PAGE_LIMIT,
+        )
+        return map_players(rows)
+
+    def fetch_competitions(self) -> list[dict]:
+        return map_competitions()
+
+    def fetch_teams(self) -> list[dict]:
+        payload = self.client.get_json("teams")
+        rows = payload.get("data") or []
+        return map_teams(rows if isinstance(rows, list) else [])
+
+    def fetch_seasons(self) -> list[dict]:
+        return map_seasons(self.configured_seasons)
+
+    def fetch_player_stats(self) -> list[dict]:
+        all_rows: list[dict] = []
+        for season in self.configured_seasons:
+            rows = self.client.list_paginated(
+                "stats",
+                params={"seasons[]": season},
+                per_page=settings.PROVIDER_BALLDONTLIE_STATS_PER_PAGE,
+                page_limit=settings.PROVIDER_BALLDONTLIE_STATS_PAGE_LIMIT,
+            )
+            all_rows.extend(rows)
+
+        player_stats, _ = map_player_stats(all_rows, allowed_seasons=self.configured_seasons)
+        return player_stats
+
+    def fetch_player_careers(self) -> list[dict]:
+        all_rows: list[dict] = []
+        for season in self.configured_seasons:
+            rows = self.client.list_paginated(
+                "stats",
+                params={"seasons[]": season},
+                per_page=settings.PROVIDER_BALLDONTLIE_STATS_PER_PAGE,
+                page_limit=settings.PROVIDER_BALLDONTLIE_STATS_PAGE_LIMIT,
+            )
+            all_rows.extend(rows)
+
+        _, player_careers = map_player_stats(all_rows, allowed_seasons=self.configured_seasons)
+        return player_careers
+
+    def sync_all(self) -> dict:
+        logger.info(
+            "provider_sync_start",
+            extra={"provider": self.namespace, "seasons": self.configured_seasons},
+        )
+        competitions = self.fetch_competitions()
+        teams = self.fetch_teams()
+        seasons = self.fetch_seasons()
+        players = self.fetch_players()
+
+        all_rows: list[dict] = []
+        for season in self.configured_seasons:
+            rows = self.client.list_paginated(
+                "stats",
+                params={"seasons[]": season},
+                per_page=settings.PROVIDER_BALLDONTLIE_STATS_PER_PAGE,
+                page_limit=settings.PROVIDER_BALLDONTLIE_STATS_PAGE_LIMIT,
+            )
+            all_rows.extend(rows)
+
+        player_stats, player_careers = map_player_stats(all_rows, allowed_seasons=self.configured_seasons)
+
+        logger.info(
+            "provider_sync_complete",
+            extra={
+                "provider": self.namespace,
+                "competitions": len(competitions),
+                "teams": len(teams),
+                "seasons": len(seasons),
+                "players": len(players),
+                "player_stats": len(player_stats),
+                "player_careers": len(player_careers),
+            },
+        )
+
+        return {
+            "players": players,
+            "competitions": competitions,
+            "teams": teams,
+            "seasons": seasons,
+            "player_stats": player_stats,
+            "player_careers": player_careers,
+            "cursor": None,
+        }
+
+    def sync_incremental(self, *, cursor: str | None = None) -> dict:
+        payload = self.sync_all()
+        payload["cursor"] = cursor
+        return payload

apps/providers/clients/__init__.py

@@ -0,0 +1,3 @@
+from .balldontlie import BalldontlieClient
+
+__all__ = ["BalldontlieClient"]

apps/providers/clients/balldontlie.py

@@ -0,0 +1,128 @@
+import logging
+import time
+from typing import Any
+
+import requests
+from django.conf import settings
+
+from apps.providers.exceptions import ProviderRateLimitError, ProviderTransientError
+
+logger = logging.getLogger(__name__)
+
+
+class BalldontlieClient:
+    """HTTP client for balldontlie with timeout/retry/rate-limit handling."""
+
+    def __init__(self, session: requests.Session | None = None):
+        self.base_url = settings.PROVIDER_BALLDONTLIE_BASE_URL.rstrip("/")
+        self.api_key = settings.PROVIDER_BALLDONTLIE_API_KEY
+        self.timeout_seconds = settings.PROVIDER_HTTP_TIMEOUT_SECONDS
+        self.max_retries = settings.PROVIDER_REQUEST_RETRIES
+        self.retry_sleep_seconds = settings.PROVIDER_REQUEST_RETRY_SLEEP
+        self.session = session or requests.Session()
+
+    def _headers(self) -> dict[str, str]:
+        headers = {"Accept": "application/json"}
+        if self.api_key:
+            headers["Authorization"] = self.api_key
+        return headers
+
+    def get_json(self, path: str, *, params: dict[str, Any] | None = None) -> dict[str, Any]:
+        url = f"{self.base_url}/{path.lstrip('/')}"
+
+        for attempt in range(1, self.max_retries + 1):
+            try:
+                response = self.session.get(
+                    url,
+                    params=params,
+                    headers=self._headers(),
+                    timeout=self.timeout_seconds,
+                )
+            except requests.Timeout as exc:
+                logger.warning(
+                    "provider_http_timeout",
+                    extra={"provider": "balldontlie", "url": url, "attempt": attempt},
+                )
+                if attempt >= self.max_retries:
+                    raise ProviderTransientError(f"Timeout calling balldontlie: {url}") from exc
+                time.sleep(self.retry_sleep_seconds * attempt)
+                continue
+            except requests.RequestException as exc:
+                logger.warning(
+                    "provider_http_error",
+                    extra={"provider": "balldontlie", "url": url, "attempt": attempt},
+                )
+                if attempt >= self.max_retries:
+                    raise ProviderTransientError(f"Network error calling balldontlie: {url}") from exc
+                time.sleep(self.retry_sleep_seconds * attempt)
+                continue
+
+            status = response.status_code
+            if status == 429:
+                retry_after = int(response.headers.get("Retry-After", "30") or "30")
+                logger.warning(
+                    "provider_rate_limited",
+                    extra={
+                        "provider": "balldontlie",
+                        "url": url,
+                        "attempt": attempt,
+                        "retry_after": retry_after,
+                    },
+                )
+                if attempt >= self.max_retries:
+                    raise ProviderRateLimitError(
+                        "balldontlie rate limit reached",
+                        retry_after_seconds=retry_after,
+                    )
+                time.sleep(max(retry_after, self.retry_sleep_seconds * attempt))
+                continue
+
+            if status >= 500:
+                logger.warning(
+                    "provider_server_error",
+                    extra={"provider": "balldontlie", "url": url, "attempt": attempt, "status": status},
+                )
+                if attempt >= self.max_retries:
+                    raise ProviderTransientError(f"balldontlie server error: {status}")
+                time.sleep(self.retry_sleep_seconds * attempt)
+                continue
+
+            if status >= 400:
+                body_preview = response.text[:240]
+                raise ProviderTransientError(
+                    f"balldontlie client error status={status} path={path} body={body_preview}"
+                )
+
+            try:
+                return response.json()
+            except ValueError as exc:
+                raise ProviderTransientError(f"Invalid JSON from balldontlie for {path}") from exc
+
+        raise ProviderTransientError(f"Failed to call balldontlie path={path}")
+
+    def list_paginated(
+        self,
+        path: str,
+        *,
+        params: dict[str, Any] | None = None,
+        per_page: int = 100,
+        page_limit: int = 1,
+    ) -> list[dict[str, Any]]:
+        page = 1
+        rows: list[dict[str, Any]] = []
+        query = dict(params or {})
+
+        while page <= page_limit:
+            query.update({"page": page, "per_page": per_page})
+            payload = self.get_json(path, params=query)
+            data = payload.get("data") or []
+            if isinstance(data, list):
+                rows.extend(data)
+
+            meta = payload.get("meta") or {}
+            next_page = meta.get("next_page")
+            if not next_page:
+                break
+            page = int(next_page)
+
+        return rows

apps/providers/registry.py

@@ -1,16 +1,29 @@
 from django.conf import settings
 
+from apps.providers.adapters.balldontlie_provider import BalldontlieProviderAdapter
 from apps.providers.adapters.mvp_provider import MvpDemoProviderAdapter
 from apps.providers.exceptions import ProviderNotFoundError
 
 
 PROVIDER_REGISTRY = {
     MvpDemoProviderAdapter.namespace: MvpDemoProviderAdapter,
+    BalldontlieProviderAdapter.namespace: BalldontlieProviderAdapter,
 }
 
 
+def get_default_provider_namespace() -> str:
+    if settings.PROVIDER_DEFAULT_NAMESPACE:
+        return settings.PROVIDER_DEFAULT_NAMESPACE
+
+    backend_map = {
+        "demo": settings.PROVIDER_NAMESPACE_DEMO,
+        "balldontlie": settings.PROVIDER_NAMESPACE_BALLDONTLIE,
+    }
+    return backend_map.get(settings.PROVIDER_BACKEND, settings.PROVIDER_NAMESPACE_DEMO)
+
+
 def get_provider(namespace: str | None = None):
-    provider_namespace = namespace or settings.PROVIDER_DEFAULT_NAMESPACE
+    provider_namespace = namespace or get_default_provider_namespace()
     provider_cls = PROVIDER_REGISTRY.get(provider_namespace)
     if not provider_cls:
         raise ProviderNotFoundError(f"Unknown provider namespace: {provider_namespace}")

apps/providers/services/balldontlie_mappings.py

@@ -0,0 +1,260 @@
+from __future__ import annotations
+
+from collections import defaultdict
+from datetime import date
+from typing import Any
+
+from django.utils.text import slugify
+
+
+def map_competitions() -> list[dict[str, Any]]:
+    return [
+        {
+            "external_id": "competition-nba",
+            "name": "NBA",
+            "slug": "nba",
+            "competition_type": "league",
+            "gender": "men",
+            "level": 1,
+            "country": {"name": "United States", "iso2_code": "US", "iso3_code": "USA"},
+            "is_active": True,
+        }
+    ]
+
+
+def map_teams(rows: list[dict[str, Any]]) -> list[dict[str, Any]]:
+    mapped: list[dict[str, Any]] = []
+    for row in rows:
+        team_id = row.get("id")
+        if not team_id:
+            continue
+        full_name = row.get("full_name") or row.get("name") or f"Team {team_id}"
+        abbreviation = (row.get("abbreviation") or "").strip()
+        mapped.append(
+            {
+                "external_id": f"team-{team_id}",
+                "name": full_name,
+                "short_name": abbreviation,
+                "slug": slugify(full_name) or f"team-{team_id}",
+                "country": {"name": "United States", "iso2_code": "US", "iso3_code": "USA"},
+                "is_national_team": False,
+            }
+        )
+    return mapped
+
+
+def _map_position(position: str | None) -> dict[str, str] | None:
+    if not position:
+        return None
+    normalized = position.upper().strip()
+    position_map = {
+        "G": ("PG", "Point Guard"),
+        "G-F": ("SG", "Shooting Guard"),
+        "F-G": ("SF", "Small Forward"),
+        "F": ("PF", "Power Forward"),
+        "F-C": ("PF", "Power Forward"),
+        "C-F": ("C", "Center"),
+        "C": ("C", "Center"),
+    }
+    code_name = position_map.get(normalized)
+    if not code_name:
+        return None
+    return {"code": code_name[0], "name": code_name[1]}
+
+
+def _map_role(position: str | None) -> dict[str, str] | None:
+    if not position:
+        return None
+    normalized = position.upper().strip()
+    if "G" in normalized:
+        return {"code": "playmaker", "name": "Playmaker"}
+    if "F" in normalized:
+        return {"code": "wing", "name": "Wing"}
+    if "C" in normalized:
+        return {"code": "big", "name": "Big"}
+    return None
+
+
+def map_players(rows: list[dict[str, Any]]) -> list[dict[str, Any]]:
+    mapped: list[dict[str, Any]] = []
+    for row in rows:
+        player_id = row.get("id")
+        if not player_id:
+            continue
+
+        first_name = row.get("first_name", "")
+        last_name = row.get("last_name", "")
+        full_name = f"{first_name} {last_name}".strip() or f"Player {player_id}"
+        position_value = row.get("position")
+        team = row.get("team") or {}
+
+        mapped.append(
+            {
+                "external_id": f"player-{player_id}",
+                "first_name": first_name,
+                "last_name": last_name,
+                "full_name": full_name,
+                "birth_date": None,
+                "nationality": {"name": "Unknown", "iso2_code": "ZZ", "iso3_code": "ZZZ"},
+                "nominal_position": _map_position(position_value),
+                "inferred_role": _map_role(position_value),
+                "height_cm": None,
+                "weight_kg": None,
+                "dominant_hand": "unknown",
+                "is_active": True,
+                "aliases": [],
+                "current_team_external_id": f"team-{team['id']}" if team.get("id") else None,
+            }
+        )
+    return mapped
+
+
+def map_seasons(seasons: list[int]) -> list[dict[str, Any]]:
+    mapped: list[dict[str, Any]] = []
+    for season in seasons:
+        mapped.append(
+            {
+                "external_id": f"season-{season}",
+                "label": f"{season}-{season + 1}",
+                "start_date": date(season, 10, 1).isoformat(),
+                "end_date": date(season + 1, 6, 30).isoformat(),
+                "is_current": False,
+            }
+        )
+    return mapped
+
+
+def _to_float(value: Any) -> float:
+    if value in (None, ""):
+        return 0.0
+    try:
+        return float(value)
+    except (TypeError, ValueError):
+        return 0.0
+
+
+def _parse_minutes(value: Any) -> int:
+    if value in (None, ""):
+        return 0
+    if isinstance(value, (int, float)):
+        return int(value)
+
+    text = str(value)
+    if ":" in text:
+        minutes, _ = text.split(":", 1)
+        return int(_to_float(minutes))
+    return int(_to_float(text))
+
+
+def _pct(value: Any, *, count: int) -> float | None:
+    if count <= 0:
+        return None
+    pct = _to_float(value) / count
+    if pct <= 1:
+        pct *= 100
+    return round(pct, 2)
+
+
+def map_player_stats(
+    rows: list[dict[str, Any]],
+    *,
+    allowed_seasons: list[int],
+) -> tuple[list[dict[str, Any]], list[dict[str, Any]]]:
+    aggregates: dict[tuple[int, int, int], dict[str, Any]] = defaultdict(
+        lambda: {
+            "games": 0,
+            "minutes": 0,
+            "points": 0.0,
+            "rebounds": 0.0,
+            "assists": 0.0,
+            "steals": 0.0,
+            "blocks": 0.0,
+            "turnovers": 0.0,
+            "fg_pct_sum": 0.0,
+            "fg_pct_count": 0,
+            "three_pct_sum": 0.0,
+            "three_pct_count": 0,
+            "ft_pct_sum": 0.0,
+            "ft_pct_count": 0,
+        }
+    )
+
+    for row in rows:
+        game = row.get("game") or {}
+        season = game.get("season")
+        player = row.get("player") or {}
+        team = row.get("team") or {}
+        player_id = player.get("id")
+        team_id = team.get("id")
+
+        if not (season and player_id and team_id):
+            continue
+        if allowed_seasons and season not in allowed_seasons:
+            continue
+
+        key = (season, player_id, team_id)
+        agg = aggregates[key]
+        agg["games"] += 1
+        agg["minutes"] += _parse_minutes(row.get("min"))
+        agg["points"] += _to_float(row.get("pts"))
+        agg["rebounds"] += _to_float(row.get("reb"))
+        agg["assists"] += _to_float(row.get("ast"))
+        agg["steals"] += _to_float(row.get("stl"))
+        agg["blocks"] += _to_float(row.get("blk"))
+        agg["turnovers"] += _to_float(row.get("turnover"))
+
+        if row.get("fg_pct") is not None:
+            agg["fg_pct_sum"] += _to_float(row.get("fg_pct"))
+            agg["fg_pct_count"] += 1
+        if row.get("fg3_pct") is not None:
+            agg["three_pct_sum"] += _to_float(row.get("fg3_pct"))
+            agg["three_pct_count"] += 1
+        if row.get("ft_pct") is not None:
+            agg["ft_pct_sum"] += _to_float(row.get("ft_pct"))
+            agg["ft_pct_count"] += 1
+
+    player_stats: list[dict[str, Any]] = []
+    player_careers: list[dict[str, Any]] = []
+
+    for (season, player_id, team_id), agg in aggregates.items():
+        games = agg["games"] or 1
+        player_stats.append(
+            {
+                "external_id": f"ps-{season}-{player_id}-{team_id}",
+                "player_external_id": f"player-{player_id}",
+                "team_external_id": f"team-{team_id}",
+                "competition_external_id": "competition-nba",
+                "season_external_id": f"season-{season}",
+                "games_played": agg["games"],
+                "games_started": 0,
+                "minutes_played": agg["minutes"],
+                "points": round(agg["points"] / games, 2),
+                "rebounds": round(agg["rebounds"] / games, 2),
+                "assists": round(agg["assists"] / games, 2),
+                "steals": round(agg["steals"] / games, 2),
+                "blocks": round(agg["blocks"] / games, 2),
+                "turnovers": round(agg["turnovers"] / games, 2),
+                "fg_pct": _pct(agg["fg_pct_sum"], count=agg["fg_pct_count"]),
+                "three_pct": _pct(agg["three_pct_sum"], count=agg["three_pct_count"]),
+                "ft_pct": _pct(agg["ft_pct_sum"], count=agg["ft_pct_count"]),
+                "usage_rate": None,
+                "true_shooting_pct": None,
+                "player_efficiency_rating": None,
+            }
+        )
+        player_careers.append(
+            {
+                "external_id": f"career-{season}-{player_id}-{team_id}",
+                "player_external_id": f"player-{player_id}",
+                "team_external_id": f"team-{team_id}",
+                "competition_external_id": "competition-nba",
+                "season_external_id": f"season-{season}",
+                "role_code": "",
+                "shirt_number": None,
+                "start_date": date(season, 10, 1).isoformat(),
+                "end_date": date(season + 1, 6, 30).isoformat(),
+                "notes": "Imported from balldontlie aggregated box scores",
+            }
+        )
+
+    return player_stats, player_careers

config/settings/base.py

@@ -118,13 +118,28 @@ CELERY_TIMEZONE = TIME_ZONE
 CELERY_TASK_TIME_LIMIT = int(os.getenv("CELERY_TASK_TIME_LIMIT", "1800"))
 CELERY_TASK_SOFT_TIME_LIMIT = int(os.getenv("CELERY_TASK_SOFT_TIME_LIMIT", "1500"))
 
-PROVIDER_DEFAULT_NAMESPACE = os.getenv("PROVIDER_DEFAULT_NAMESPACE", "mvp_demo")
+PROVIDER_BACKEND = os.getenv("PROVIDER_BACKEND", "demo").strip().lower()
+PROVIDER_NAMESPACE_DEMO = os.getenv("PROVIDER_NAMESPACE_DEMO", "mvp_demo")
+PROVIDER_NAMESPACE_BALLDONTLIE = os.getenv("PROVIDER_NAMESPACE_BALLDONTLIE", "balldontlie")
+PROVIDER_DEFAULT_NAMESPACE = os.getenv("PROVIDER_DEFAULT_NAMESPACE", "").strip()
 PROVIDER_MVP_DATA_FILE = os.getenv(
     "PROVIDER_MVP_DATA_FILE",
     str(BASE_DIR / "apps" / "providers" / "data" / "mvp_provider.json"),
 )
 PROVIDER_REQUEST_RETRIES = int(os.getenv("PROVIDER_REQUEST_RETRIES", "3"))
 PROVIDER_REQUEST_RETRY_SLEEP = float(os.getenv("PROVIDER_REQUEST_RETRY_SLEEP", "1"))
+PROVIDER_HTTP_TIMEOUT_SECONDS = float(os.getenv("PROVIDER_HTTP_TIMEOUT_SECONDS", "10"))
+PROVIDER_BALLDONTLIE_BASE_URL = os.getenv("PROVIDER_BALLDONTLIE_BASE_URL", "https://api.balldontlie.io/v1")
+PROVIDER_BALLDONTLIE_API_KEY = os.getenv("PROVIDER_BALLDONTLIE_API_KEY", "")
+PROVIDER_BALLDONTLIE_PLAYERS_PAGE_LIMIT = int(os.getenv("PROVIDER_BALLDONTLIE_PLAYERS_PAGE_LIMIT", "5"))
+PROVIDER_BALLDONTLIE_PLAYERS_PER_PAGE = int(os.getenv("PROVIDER_BALLDONTLIE_PLAYERS_PER_PAGE", "100"))
+PROVIDER_BALLDONTLIE_STATS_PAGE_LIMIT = int(os.getenv("PROVIDER_BALLDONTLIE_STATS_PAGE_LIMIT", "10"))
+PROVIDER_BALLDONTLIE_STATS_PER_PAGE = int(os.getenv("PROVIDER_BALLDONTLIE_STATS_PER_PAGE", "100"))
+PROVIDER_BALLDONTLIE_SEASONS = [
+    int(value.strip())
+    for value in os.getenv("PROVIDER_BALLDONTLIE_SEASONS", "2024").split(",")
+    if value.strip().isdigit()
+]
 
 REST_FRAMEWORK = {
     "DEFAULT_PERMISSION_CLASSES": [

requirements/base.txt

@@ -5,3 +5,4 @@ gunicorn>=22.0,<23.0
 celery[redis]>=5.4,<6.0
 redis>=5.2,<6.0
 python-dotenv>=1.0,<2.0
+requests>=2.32,<3.0

tests/test_ingestion_sync.py

@@ -7,6 +7,7 @@ from apps.ingestion.models import IngestionError, IngestionRun
 from apps.ingestion.services.sync import run_sync_job
 from apps.players.models import Player
 from apps.providers.exceptions import ProviderRateLimitError
+from apps.providers.models import ExternalMapping
 from apps.stats.models import PlayerSeason, PlayerSeasonStats
 from apps.teams.models import Team
 
@@ -81,3 +82,128 @@ def test_run_sync_handles_rate_limit(settings):
     assert IngestionError.objects.filter(ingestion_run=run).exists()
 
     os.environ.pop("PROVIDER_MVP_FORCE_RATE_LIMIT", None)
+
+
+@pytest.mark.django_db
+def test_balldontlie_sync_idempotency_with_stable_payload(monkeypatch):
+    class StableProvider:
+        def sync_all(self):
+            return {
+                "competitions": [
+                    {
+                        "external_id": "competition-nba",
+                        "name": "NBA",
+                        "slug": "nba",
+                        "competition_type": "league",
+                        "gender": "men",
+                        "level": 1,
+                        "country": {"name": "United States", "iso2_code": "US", "iso3_code": "USA"},
+                        "is_active": True,
+                    }
+                ],
+                "teams": [
+                    {
+                        "external_id": "team-14",
+                        "name": "Los Angeles Lakers",
+                        "short_name": "LAL",
+                        "slug": "los-angeles-lakers",
+                        "country": {"name": "United States", "iso2_code": "US", "iso3_code": "USA"},
+                        "is_national_team": False,
+                    }
+                ],
+                "seasons": [
+                    {
+                        "external_id": "season-2024",
+                        "label": "2024-2025",
+                        "start_date": "2024-10-01",
+                        "end_date": "2025-06-30",
+                        "is_current": False,
+                    }
+                ],
+                "players": [
+                    {
+                        "external_id": "player-237",
+                        "first_name": "LeBron",
+                        "last_name": "James",
+                        "full_name": "LeBron James",
+                        "birth_date": None,
+                        "nationality": {"name": "United States", "iso2_code": "US", "iso3_code": "USA"},
+                        "nominal_position": {"code": "SF", "name": "Small Forward"},
+                        "inferred_role": {"code": "wing", "name": "Wing"},
+                        "height_cm": None,
+                        "weight_kg": None,
+                        "dominant_hand": "unknown",
+                        "is_active": True,
+                        "aliases": [],
+                    }
+                ],
+                "player_stats": [
+                    {
+                        "external_id": "ps-2024-237-14",
+                        "player_external_id": "player-237",
+                        "team_external_id": "team-14",
+                        "competition_external_id": "competition-nba",
+                        "season_external_id": "season-2024",
+                        "games_played": 2,
+                        "games_started": 0,
+                        "minutes_played": 68,
+                        "points": 25,
+                        "rebounds": 9,
+                        "assists": 8,
+                        "steals": 1.5,
+                        "blocks": 0.5,
+                        "turnovers": 3.5,
+                        "fg_pct": 55.0,
+                        "three_pct": 45.0,
+                        "ft_pct": 95.0,
+                        "usage_rate": None,
+                        "true_shooting_pct": None,
+                        "player_efficiency_rating": None,
+                    }
+                ],
+                "player_careers": [
+                    {
+                        "external_id": "career-2024-237-14",
+                        "player_external_id": "player-237",
+                        "team_external_id": "team-14",
+                        "competition_external_id": "competition-nba",
+                        "season_external_id": "season-2024",
+                        "role_code": "",
+                        "shirt_number": None,
+                        "start_date": "2024-10-01",
+                        "end_date": "2025-06-30",
+                        "notes": "Imported from balldontlie aggregated box scores",
+                    }
+                ],
+            }
+
+        def sync_incremental(self, *, cursor: str | None = None):
+            payload = self.sync_all()
+            payload["cursor"] = cursor
+            return payload
+
+    monkeypatch.setattr("apps.ingestion.services.sync.get_provider", lambda namespace: StableProvider())
+
+    run_sync_job(provider_namespace="balldontlie", job_type=IngestionRun.JobType.FULL_SYNC)
+    counts_first = {
+        "competition": Competition.objects.count(),
+        "team": Team.objects.count(),
+        "season": Season.objects.count(),
+        "player": Player.objects.count(),
+        "player_season": PlayerSeason.objects.count(),
+        "player_stats": PlayerSeasonStats.objects.count(),
+        "mapping": ExternalMapping.objects.filter(provider_namespace="balldontlie").count(),
+    }
+
+    run_sync_job(provider_namespace="balldontlie", job_type=IngestionRun.JobType.FULL_SYNC)
+    counts_second = {
+        "competition": Competition.objects.count(),
+        "team": Team.objects.count(),
+        "season": Season.objects.count(),
+        "player": Player.objects.count(),
+        "player_season": PlayerSeason.objects.count(),
+        "player_stats": PlayerSeasonStats.objects.count(),
+        "mapping": ExternalMapping.objects.filter(provider_namespace="balldontlie").count(),
+    }
+
+    assert counts_first == counts_second

tests/test_provider_balldontlie.py

@@ -0,0 +1,183 @@
+from __future__ import annotations
+
+import time
+from typing import Any
+
+import pytest
+import requests
+
+from apps.providers.adapters.balldontlie_provider import BalldontlieProviderAdapter
+from apps.providers.adapters.mvp_provider import MvpDemoProviderAdapter
+from apps.providers.clients.balldontlie import BalldontlieClient
+from apps.providers.exceptions import ProviderRateLimitError, ProviderTransientError
+from apps.providers.registry import get_default_provider_namespace, get_provider
+
+
+class _FakeResponse:
+    def __init__(self, *, status_code: int, payload: dict[str, Any] | None = None, headers: dict[str, str] | None = None, text: str = ""):
+        self.status_code = status_code
+        self._payload = payload or {}
+        self.headers = headers or {}
+        self.text = text
+
+    def json(self):
+        return self._payload
+
+
+class _FakeSession:
+    def __init__(self, responses: list[Any]):
+        self._responses = responses
+
+    def get(self, *args, **kwargs):
+        item = self._responses.pop(0)
+        if isinstance(item, Exception):
+            raise item
+        return item
+
+
+class _FakeBalldontlieClient:
+    def get_json(self, path: str, *, params: dict[str, Any] | None = None) -> dict[str, Any]:
+        if path == "teams":
+            return {
+                "data": [
+                    {
+                        "id": 14,
+                        "full_name": "Los Angeles Lakers",
+                        "abbreviation": "LAL",
+                    }
+                ]
+            }
+        return {"data": []}
+
+    def list_paginated(
+        self,
+        path: str,
+        *,
+        params: dict[str, Any] | None = None,
+        per_page: int = 100,
+        page_limit: int = 1,
+    ) -> list[dict[str, Any]]:
+        if path == "players":
+            return [
+                {
+                    "id": 237,
+                    "first_name": "LeBron",
+                    "last_name": "James",
+                    "position": "F",
+                    "team": {"id": 14},
+                }
+            ]
+        if path == "stats":
+            return [
+                {
+                    "pts": 20,
+                    "reb": 8,
+                    "ast": 7,
+                    "stl": 1,
+                    "blk": 1,
+                    "turnover": 3,
+                    "fg_pct": 0.5,
+                    "fg3_pct": 0.4,
+                    "ft_pct": 0.9,
+                    "min": "35:12",
+                    "player": {"id": 237},
+                    "team": {"id": 14},
+                    "game": {"season": 2024},
+                },
+                {
+                    "pts": 30,
+                    "reb": 10,
+                    "ast": 9,
+                    "stl": 2,
+                    "blk": 0,
+                    "turnover": 4,
+                    "fg_pct": 0.6,
+                    "fg3_pct": 0.5,
+                    "ft_pct": 1.0,
+                    "min": "33:00",
+                    "player": {"id": 237},
+                    "team": {"id": 14},
+                    "game": {"season": 2024},
+                },
+            ]
+        return []
+
+
+@pytest.mark.django_db
+def test_provider_registry_backend_selection(settings):
+    settings.PROVIDER_DEFAULT_NAMESPACE = ""
+    settings.PROVIDER_BACKEND = "demo"
+    assert get_default_provider_namespace() == "mvp_demo"
+    assert isinstance(get_provider(), MvpDemoProviderAdapter)
+
+    settings.PROVIDER_BACKEND = "balldontlie"
+    assert get_default_provider_namespace() == "balldontlie"
+    assert isinstance(get_provider(), BalldontlieProviderAdapter)
+
+    settings.PROVIDER_DEFAULT_NAMESPACE = "mvp_demo"
+    assert get_default_provider_namespace() == "mvp_demo"
+
+
+@pytest.mark.django_db
+def test_balldontlie_adapter_maps_payloads(settings):
+    settings.PROVIDER_BALLDONTLIE_SEASONS = [2024]
+    adapter = BalldontlieProviderAdapter(client=_FakeBalldontlieClient())
+
+    payload = adapter.sync_all()
+
+    assert payload["competitions"][0]["external_id"] == "competition-nba"
+    assert payload["teams"][0]["external_id"] == "team-14"
+    assert payload["players"][0]["external_id"] == "player-237"
+    assert payload["seasons"][0]["external_id"] == "season-2024"
+    assert payload["player_stats"][0]["games_played"] == 2
+    assert payload["player_stats"][0]["points"] == 25.0
+    assert payload["player_stats"][0]["fg_pct"] == 55.0
+
+
+@pytest.mark.django_db
+def test_balldontlie_client_retries_after_rate_limit(monkeypatch, settings):
+    monkeypatch.setattr(time, "sleep", lambda _: None)
+    settings.PROVIDER_REQUEST_RETRIES = 2
+    settings.PROVIDER_REQUEST_RETRY_SLEEP = 0
+
+    session = _FakeSession(
+        responses=[
+            _FakeResponse(status_code=429, headers={"Retry-After": "0"}),
+            _FakeResponse(status_code=200, payload={"data": []}),
+        ]
+    )
+    client = BalldontlieClient(session=session)
+
+    payload = client.get_json("players")
+    assert payload == {"data": []}
+
+
+@pytest.mark.django_db
+def test_balldontlie_client_timeout_retries_then_fails(monkeypatch, settings):
+    monkeypatch.setattr(time, "sleep", lambda _: None)
+    settings.PROVIDER_REQUEST_RETRIES = 2
+    settings.PROVIDER_REQUEST_RETRY_SLEEP = 0
+
+    session = _FakeSession(responses=[requests.Timeout("slow"), requests.Timeout("slow")])
+    client = BalldontlieClient(session=session)
+
+    with pytest.raises(ProviderTransientError):
+        client.get_json("players")
+
+
+@pytest.mark.django_db
+def test_balldontlie_client_raises_rate_limit_after_max_retries(monkeypatch, settings):
+    monkeypatch.setattr(time, "sleep", lambda _: None)
+    settings.PROVIDER_REQUEST_RETRIES = 2
+    settings.PROVIDER_REQUEST_RETRY_SLEEP = 0
+
+    session = _FakeSession(
+        responses=[
+            _FakeResponse(status_code=429, headers={"Retry-After": "1"}),
+            _FakeResponse(status_code=429, headers={"Retry-After": "1"}),
+        ]
+    )
+    client = BalldontlieClient(session=session)
+
+    with pytest.raises(ProviderRateLimitError):
+        client.get_json("players")