from __future__ import annotations

from model_router.router import ModelRequestContract, ModelResponseContract


class DeterministicCodingProvider:
    """Local deterministic provider used by M2 tests before real Qwen wiring."""

    provider_name = "deterministic"

    def complete(self, request: ModelRequestContract) -> ModelResponseContract:
        prompt = request.prompt.lower()
        if "force_bad_implementation" in prompt:
            operations = [{"type": "write_text", "path": "bad.txt", "content": "not enough\n"}]
            return ModelResponseContract("qwen-deterministic", "Wrote intentionally insufficient change.", {"operations": operations})
        if "/health" in prompt or "health endpoint" in prompt:
            urls = '''from django.http import JsonResponse\nfrom django.urls import path\n\n\ndef health(request):\n    return JsonResponse({"status": "ok"})\n\n\nurlpatterns = [\n    path("health", health, name="health"),\n]\n'''
            tests = '''from django.test import TestCase\n\n\nclass HealthEndpointTests(TestCase):\n    def test_health_endpoint(self):\n        response = self.client.get("/health")\n\n        self.assertEqual(response.status_code, 200)\n        self.assertEqual(response.json(), {"status": "ok"})\n'''
            operations = [
                {"type": "write_text", "path": "app/urls.py", "content": urls},
                {"type": "write_text", "path": "tests/test_health.py", "content": tests},
            ]
            return ModelResponseContract("qwen-deterministic", "Implemented health endpoint and tests.", {"operations": operations})
        if "description field" in prompt:
            models = '''from django.db import models\n\n\nclass Item(models.Model):\n    name = models.CharField(max_length=100)\n    description = models.TextField(blank=True)\n\n    def __str__(self):\n        return self.name\n'''
            admin = '''from django.contrib import admin\n\nfrom items.models import Item\n\n\n@admin.register(Item)\nclass ItemAdmin(admin.ModelAdmin):\n    list_display = ("name", "description")\n    search_fields = ("name", "description")\n'''
            tests = '''from django.test import TestCase\n\nfrom items.models import Item\n\n\nclass ItemDescriptionTests(TestCase):\n    def test_item_description_field(self):\n        item = Item.objects.create(name="Widget", description="Useful")\n\n        self.assertEqual(item.description, "Useful")\n'''
            migration = '''# Generated by Artifex deterministic M2 coder\nfrom django.db import migrations, models\n\n\nclass Migration(migrations.Migration):\n    dependencies = [\n        ("items", "0001_initial"),\n    ]\n\n    operations = [\n        migrations.AddField(\n            model_name="item",\n            name="description",\n            field=models.TextField(blank=True),\n        ),\n    ]\n'''
            operations = [
                {"type": "write_text", "path": "items/models.py", "content": models},
                {"type": "write_text", "path": "items/admin.py", "content": admin},
                {"type": "write_text", "path": "items/migrations/0002_item_description.py", "content": migration},
                {"type": "write_text", "path": "tests/test_item_description.py", "content": tests},
            ]
            return ModelResponseContract("qwen-deterministic", "Added description field, migration, admin, and tests.", {"operations": operations})
        return ModelResponseContract("qwen-deterministic", "No operation matched.", {"operations": []})

    def health(self) -> str:
        return "AVAILABLE"


class DeterministicSolProvider:
    provider_name = "deterministic_sol"

    def __init__(self, content: str) -> None:
        self.content = content

    def complete(self, request):
        return ModelResponseContract("sol-deterministic", self.content, {"usage": {}})

    def health(self) -> str:
        return "AVAILABLE"