from __future__ import annotations

import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parents[1]))

from schema_contract import migrate_training_config, validate_training_config


def legacy_config():
    return {
        "meta": {
            "title": "Alter Plan",
            "subtitle": "wird reduziert",
            "output_name": "plan.pdf",
        },
        "colors": {"ACCENT": "#ff00ff"},
        "training_format": {"mode": "tabata", "rounds": 8},
        "phases": {"items": [{"name": "Phase 1"}]},
        "stages": {"squat": {"name": "Squat", "steps": ["leicht", "schwer"]}},
        "prepost": {
            "1": {
                "warmup": "Handgelenke · Kniebeugen",
                "cooldown": "Atmen<br/>Locker gehen",
                "stretch": "alte Dehnung",
            }
        },
        "days": [
            {
                "num": 1,
                "focus": "Beine",
                "color": "#123456",
                "rotations": [
                    {
                        "label": "Block A",
                        "exercises": [
                            {
                                "id": "old-placement",
                                "exercise_id": "exercise-squat",
                                "name": "Squat",
                                "key": "squat",
                                "cue": "tief",
                                "result_schema": {"mode": "reps"},
                            }
                        ],
                    }
                ],
            }
        ],
    }


def test_migration_flattens_legacy_plan_to_days_and_exercises():
    migrated = migrate_training_config(legacy_config(), plan_id="test")

    assert migrated["schema_version"] == 4
    assert migrated["contract_version"] == 3
    assert migrated["plan_id"] == "test"
    assert "colors" not in migrated
    assert "training_format" not in migrated
    assert "phases" not in migrated
    assert "stages" not in migrated
    assert "exercise_catalog" not in migrated

    assert migrated["meta"] == {"title": "Alter Plan", "subtitle": "wird reduziert"}
    assert migrated["exercises"] == [{"id": "exercise-squat", "name": "Squat", "cue": "tief"}]

    day = migrated["days"][0]
    assert day["name"] == "Beine"
    assert day["warmup"]["items"] == ["Handgelenke", "Kniebeugen"]
    assert day["cooldown"]["items"] == ["Atmen", "Locker gehen"]
    assert "stretch" not in day
    assert "rotations" not in day

    item = day["exercises"][0]
    assert item == {
        "id": "old-placement",
        "exercise_id": "exercise-squat",
        "notes": "Block A",
    }


def test_migration_is_stable_across_repeated_runs():
    first = migrate_training_config(legacy_config(), plan_id="test")
    second = migrate_training_config(first, plan_id="test")
    assert first == second


def test_validation_accepts_complete_minimal_plan():
    cfg = {
        "meta": {"title": "Minimal"},
        "exercises": [{"id": "exercise-pushup", "name": "Push-up"}],
        "days": [
            {
                "id": "day-1",
                "num": 1,
                "name": "Tag 1",
                "warmup": {"items": ["Mobilisieren"]},
                "cooldown": {"items": ["Atmen"]},
                "exercises": [{"id": "item-1", "exercise_id": "exercise-pushup", "sets": 3, "reps": "8-12"}],
            }
        ],
    }
    assert validate_training_config(cfg)["errors"] == []


def test_validation_rejects_unknown_day_exercise_reference():
    cfg = {
        "meta": {"title": "Kaputt"},
        "exercises": [{"id": "exercise-pushup", "name": "Push-up"}],
        "days": [
            {
                "id": "day-1",
                "num": 1,
                "name": "Tag 1",
                "exercises": [{"id": "item-1", "exercise_id": "missing"}],
            }
        ],
    }

    errors = validate_training_config(cfg)["errors"]
    assert [error["code"] for error in errors] == ["unknown_exercise"]