"""Task 3: Workflow Syntax and Structure — EASY.

Agent fixes GitHub Actions YAML syntax and job structure issues:
step ordering, missing runs-on, invalid triggers, duplicate job IDs,
and missing 'on' trigger.
"""



from server.models import TaskDifficulty
from server.tasks.base import BaseTask


class WorkflowSyntaxStructureTask(BaseTask):
    NAME = "Workflow Syntax and Structure"
    DESCRIPTION = "Fix GitHub Actions YAML syntax and job structure issues"
    DIFFICULTY = TaskDifficulty.EASY
    AVAILABLE_SECRETS = ["GITHUB_TOKEN"]

    SCENARIOS = [
        # Scenario 1: Checkout happens after build (wrong step order)
        {
            "id": "checkout_after_build",
            "files": [
                {
                    "path": ".github/workflows/build.yml",
                    "type": "workflow",
                    "content": (
                        "name: Build\n"
                        "on: push\n"
                        "\n"
                        "jobs:\n"
                        "  build:\n"
                        "    runs-on: ubuntu-latest\n"
                        "    steps:\n"
                        "      - name: Build Docker image\n"
                        "        run: docker build -t myapp .\n"
                        "      - uses: actions/checkout@v4\n"
                        "      - name: Run tests\n"
                        "        run: docker run myapp pytest"
                    ),
                },
                {
                    "path": "Dockerfile",
                    "type": "dockerfile",
                    "content": (
                        "FROM python:3.11-slim\n"
                        "WORKDIR /app\n"
                        "COPY . .\n"
                        'CMD ["python", "app.py"]'
                    ),
                },
            ],
            "error": {
                "phase": "workflow_parse",
                "message": (
                    "unable to prepare context: unable to evaluate symlinks "
                    "in Dockerfile path: lstat /home/runner/work/repo/repo/Dockerfile: "
                    "no such file or directory"
                ),
                "exit_code": 1,
                "failed_step": "Build Docker image",
            },
            "expected_fixes": [
                {
                    "file": ".github/workflows/build.yml",
                    "type": "contains",
                    "expected": "- uses: actions/checkout@v4",
                    "hint": "Checkout must happen before any build commands",
                }
            ],
        },

        # Scenario 2: Missing runs-on field in job
        {
            "id": "missing_runs_on",
            "files": [
                {
                    "path": ".github/workflows/ci.yml",
                    "type": "workflow",
                    "content": (
                        "name: CI Pipeline\n"
                        "on: [push, pull_request]\n"
                        "\n"
                        "jobs:\n"
                        "  test:\n"
                        "    steps:\n"
                        "      - uses: actions/checkout@v4\n"
                        "      - name: Run tests\n"
                        "        run: npm test"
                    ),
                },
            ],
            "error": {
                "phase": "workflow_parse",
                "message": "Job 'test' is missing required field 'runs-on'",
                "exit_code": 1,
            },
            "expected_fixes": [
                {
                    "file": ".github/workflows/ci.yml",
                    "type": "contains",
                    "expected": "runs-on:",
                    "hint": "Every job must specify a 'runs-on' field (e.g. runs-on: ubuntu-latest)",
                }
            ],
        },

        # Scenario 3: Invalid event trigger syntax
        {
            "id": "invalid_trigger_syntax",
            "files": [
                {
                    "path": ".github/workflows/deploy.yml",
                    "type": "workflow",
                    "content": (
                        "name: Deploy\n"
                        "on:\n"
                        "  push:\n"
                        "    branches: main\n"
                        "\n"
                        "jobs:\n"
                        "  deploy:\n"
                        "    runs-on: ubuntu-latest\n"
                        "    steps:\n"
                        "      - uses: actions/checkout@v4\n"
                        "      - name: Deploy\n"
                        "        run: echo 'deploying...'"
                    ),
                },
            ],
            "error": {
                "phase": "workflow_parse",
                "message": (
                    "Unexpected value 'main' for 'on.push.branches'. "
                    "Expected a sequence (list) value."
                ),
                "exit_code": 1,
            },
            "expected_fixes": [
                {
                    "file": ".github/workflows/deploy.yml",
                    "type": "contains",
                    "expected": "branches: [main]",
                    "hint": "branches must be a list: branches: [main] or branches:\\n  - main",
                }
            ],
        },

        # Scenario 4: Duplicate step IDs / missing step name
        {
            "id": "missing_step_uses_or_run",
            "files": [
                {
                    "path": ".github/workflows/lint.yml",
                    "type": "workflow",
                    "content": (
                        "name: Lint\n"
                        "on: push\n"
                        "\n"
                        "jobs:\n"
                        "  lint:\n"
                        "    runs-on: ubuntu-latest\n"
                        "    steps:\n"
                        "      - uses: actions/checkout@v4\n"
                        "      - name: Install dependencies\n"
                        "        run: npm ci\n"
                        "      - name: Run linter\n"
                    ),
                },
            ],
            "error": {
                "phase": "workflow_parse",
                "message": "Every step must define a 'uses' or 'run' key. Step 'Run linter' has neither.",
                "exit_code": 1,
            },
            "expected_fixes": [
                {
                    "file": ".github/workflows/lint.yml",
                    "type": "contains",
                    "expected": "run:",
                    "hint": "The 'Run linter' step is missing a 'run' command — add e.g. run: npm run lint",
                }
            ],
        },

        # Scenario 5: Missing 'on' trigger entirely
        {
            "id": "missing_on_trigger",
            "files": [
                {
                    "path": ".github/workflows/test.yml",
                    "type": "workflow",
                    "content": (
                        "name: Test Suite\n"
                        "\n"
                        "jobs:\n"
                        "  test:\n"
                        "    runs-on: ubuntu-latest\n"
                        "    steps:\n"
                        "      - uses: actions/checkout@v4\n"
                        "      - name: Run tests\n"
                        "        run: pytest tests/ -v"
                    ),
                },
            ],
            "error": {
                "phase": "workflow_parse",
                "message": "Workflow must define an 'on' trigger event",
                "exit_code": 1,
            },
            "expected_fixes": [
                {
                    "file": ".github/workflows/test.yml",
                    "type": "contains",
                    "expected": "on:",
                    "hint": "Workflow is missing the required 'on' trigger — add e.g. on: push",
                }
            ],
        },
    ]