"""Generate the canonical identity registry for Mais Humana.

The output is importable Python source.  It lets tests, CLI commands, MCP
providers, and central reports validate aliases without rescanning the
workspace or parsing Markdown during runtime.
"""

from __future__ import annotations

from pathlib import Path
from typing import Iterable


ROOT = Path(__file__).resolve().parents[1]
SRC = ROOT / "src"
OUTPUT = SRC / "mais_humana" / "generated_canonical_identity_registry.py"


def ensure_import_path() -> None:
    import sys

    src = str(SRC)
    if src not in sys.path:
        sys.path.insert(0, src)


def q(value: object) -> str:
    return repr(str(value))


def bool_literal(value: bool) -> str:
    return "True" if value else "False"


def tuple_literal(values: Iterable[object], *, indent: int = 8) -> str:
    cleaned = [str(value) for value in values if str(value).strip()]
    if not cleaned:
        return "()"
    if len(cleaned) <= 8:
        return "(" + ", ".join(q(value) for value in cleaned) + ("," if len(cleaned) == 1 else "") + ")"
    pad = " " * indent
    lines = ["("]
    for value in cleaned:
        lines.append(f"{pad}{q(value)},")
    lines.append(" " * (indent - 4) + ")")
    return "\n".join(lines)


def alias_block(alias: object, *, indent: int = 12) -> str:
    return "\n".join(
        [
            " " * indent + "CanonicalAlias(",
            " " * (indent + 4) + f"identifier={q(getattr(alias, 'identifier'))},",
            " " * (indent + 4) + f"kind=CanonicalAliasKind.{getattr(alias, 'kind').name},",
            " " * (indent + 4) + f"accepted={bool_literal(getattr(alias, 'accepted'))},",
            " " * (indent + 4) + f"canonical={bool_literal(getattr(alias, 'canonical'))},",
            " " * (indent + 4) + f"reason={q(getattr(alias, 'reason'))},",
            " " * (indent + 4) + f"required_action={q(getattr(alias, 'required_action'))},",
            " " * indent + "),",
        ]
    )


def record_block(record: object) -> str:
    alias_lines = ["        aliases=("]
    alias_lines.extend(alias_block(alias, indent=12) for alias in getattr(record, "aliases"))
    alias_lines.append("        ),")
    return "\n".join(
        [
            "    CanonicalIdentityRecord(",
            f"        platform_id={q(getattr(record, 'platform_id'))},",
            f"        canonical_project_id={q(getattr(record, 'canonical_project_id'))},",
            f"        current_project_id={q(getattr(record, 'current_project_id'))},",
            f"        central_folder={q(getattr(record, 'central_folder'))},",
            f"        gitea_repo={q(getattr(record, 'gitea_repo'))},",
            f"        expected_remote_url={q(getattr(record, 'expected_remote_url'))},",
            f"        owner_platform_id={q(getattr(record, 'owner_platform_id'))},",
            *alias_lines,
            f"        decision_status={q(getattr(record, 'decision_status'))},",
            f"        decision_source={q(getattr(record, 'decision_source'))},",
            f"        compatibility_rule={q(getattr(record, 'compatibility_rule'))},",
            f"        migration_safe_now={bool_literal(getattr(record, 'migration_safe_now'))},",
            f"        notes={tuple_literal(getattr(record, 'notes'), indent=12)},",
            "    ),",
        ]
    )


def case_block(case: object) -> str:
    return "\n".join(
        [
            "    CanonicalIdentityAcceptanceCase(",
            f"        case_id={q(getattr(case, 'case_id'))},",
            f"        platform_id={q(getattr(case, 'platform_id'))},",
            f"        operation={q(getattr(case, 'operation'))},",
            f"        permission_scope={q(getattr(case, 'permission_scope'))},",
            f"        field_name={q(getattr(case, 'field_name'))},",
            f"        candidate_value={q(getattr(case, 'candidate_value'))},",
            f"        canonical_project_id={q(getattr(case, 'canonical_project_id'))},",
            f"        accepted={bool_literal(getattr(case, 'accepted'))},",
            f"        status={q(getattr(case, 'status'))},",
            f"        decision_reason={q(getattr(case, 'decision_reason'))},",
            f"        required_action={q(getattr(case, 'required_action'))},",
            f"        mcp_transit_required={bool_literal(getattr(case, 'mcp_transit_required'))},",
            f"        direct_platform_bypass_blocked={bool_literal(getattr(case, 'direct_platform_bypass_blocked'))},",
            "    ),",
        ]
    )


def main() -> int:
    ensure_import_path()
    from mais_humana.canonical_identity import build_acceptance_cases, build_identity_records

    records = build_identity_records()
    cases = build_acceptance_cases(records)
    lines = [
        '"""Generated canonical identity registry for Mais Humana.',
        "",
        "Do not edit this file by hand.  Regenerate it with:",
        "",
        "    python tools/generate_canonical_identity_registry.py",
        "",
        "The registry is source code so it can be imported, tested, packaged,",
        "hashed, and exposed through MCP without parsing Markdown at runtime.",
        '"""',
        "",
        "from __future__ import annotations",
        "",
        "from .canonical_identity import (",
        "    CanonicalAlias,",
        "    CanonicalAliasKind,",
        "    CanonicalIdentityAcceptanceCase,",
        "    CanonicalIdentityRecord,",
        ")",
        "",
        f"GENERATED_RECORDS_COUNT = {len(records)}",
        f"GENERATED_ACCEPTANCE_CASES_COUNT = {len(cases)}",
        "",
        "RECORDS = (",
    ]
    lines.extend(record_block(record) for record in records)
    lines.extend(
        [
            ")",
            "",
            "ACCEPTANCE_CASES = (",
        ]
    )
    lines.extend(case_block(case) for case in cases)
    lines.extend(
        [
            ")",
            "",
            "",
            "def iter_records():",
            "    return RECORDS",
            "",
            "",
            "def iter_acceptance_cases():",
            "    return ACCEPTANCE_CASES",
            "",
        ]
    )
    OUTPUT.write_text("\n".join(lines), encoding="utf-8")
    print(f"generated {OUTPUT} records={len(records)} cases={len(cases)} lines={len(lines)}")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())