"""
Platform tests: Migration generation from contracts.

SPEC-TESTER-CONV-0030: Generate migration template from contract schema
SPEC-TESTER-CONV-0033: Map JSON Schema types to PostgreSQL types
"""
import pytest
import json
import tempfile
from pathlib import Path

from atdd.coach.utils.repo import find_repo_root

# Path constants
REPO_ROOT = find_repo_root()
CONTRACTS_DIR = REPO_ROOT / "contracts"


@pytest.mark.platform
def test_generate_migration_from_contract():
    """
    SPEC-TESTER-CONV-0030: Generate migration template from contract schema

    Given: Contract schema at contracts/match/dilemma/current.schema.json
    When: Running migration generator
    Then: Migration file created with correct structure
          Contains CREATE TABLE statement
          Includes TODO markers for review
    """
    # This test will pass once the generator is implemented
    # For now, it documents the expected behavior
    pytest.skip("Migration generator not yet implemented - RED test placeholder")


@pytest.mark.platform
def test_table_naming_convention():
    """
    SPEC-TESTER-CONV-0030: Table naming follows convention

    Given: Contract at contracts/{theme}/{domain}/{aspect}.schema.json
    When: Generating migration
    Then: Table name is {theme}_{domain}_{aspect}
          Uses snake_case
          Matches PostgreSQL naming rules
    """
    # Example test data
    test_cases = [
        {
            "path": "contracts/match/dilemma/current.schema.json",
            "expected_table": "match_dilemma_current"
        },
        {
            "path": "contracts/commons/ux/foundations.schema.json",
            "expected_table": "commons_ux_foundations"
        },
        {
            "path": "contracts/mechanic/timebank/remaining.schema.json",
            "expected_table": "mechanic_timebank_remaining"
        }
    ]

    for case in test_cases:
        path = Path(case["path"])
        parts = path.parts

        theme = parts[1]   # contracts/{theme}/...
        domain = parts[2]  # contracts/{theme}/{domain}/...
        aspect = path.stem.replace(".schema", "")

        actual_table = f"{theme}_{domain}_{aspect}"

        assert actual_table == case["expected_table"], \
            f"Table name mismatch for {case['path']}: expected {case['expected_table']}, got {actual_table}"


@pytest.mark.platform
def test_json_to_postgres_type_mapping():
    """
    SPEC-TESTER-CONV-0033: Map JSON Schema types to PostgreSQL types

    Given: Contract properties with various JSON Schema types
    When: Mapping to PostgreSQL types
    Then: Correct type mapping applied
          string → TEXT
          string with UUID pattern → UUID
          string with date-time format → TIMESTAMPTZ
          integer → INTEGER
          number → NUMERIC
          boolean → BOOLEAN
          object → JSONB (with TODO)
          array → JSONB (with TODO)
    """
    # This will be implemented by the migration generator utility
    # Testing the type mapping logic

    type_mappings = {
        # Primitives
        ("string", None, None): "TEXT",
        ("string", "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$", None): "UUID",
        ("string", None, "date-time"): "TIMESTAMPTZ",
        ("string", None, "date"): "DATE",
        ("string", None, "email"): "TEXT",
        ("string", None, "uri"): "TEXT",
        ("integer", None, None): "INTEGER",
        ("number", None, None): "NUMERIC",
        ("boolean", None, None): "BOOLEAN",

        # Complex (require review)
        ("object", None, None): "JSONB",
        ("array", None, None): "JSONB",
    }

    # Verify mapping exists for common types
    for (json_type, pattern, format_type), expected_pg_type in type_mappings.items():
        # This will call the actual mapper once implemented
        # For now, just verify the expected mappings are defined
        assert expected_pg_type in ["TEXT", "UUID", "TIMESTAMPTZ", "DATE", "INTEGER", "NUMERIC", "BOOLEAN", "JSONB"], \
            f"Invalid PostgreSQL type: {expected_pg_type}"