from __future__ import annotations

from typing import Any

from app.modules.zootech.lab.constants import DIFF_TOLERANCE_KG


def compare_master_execution(
    master_lines: list[dict[str, Any]],
    execution_lines: list[dict[str, Any]],
) -> dict[str, Any]:
    master_map: dict[str, float] = {}
    for line in master_lines:
        if not line.get("in_ration"):
            continue
        cid = line.get("component_id")
        if not cid:
            continue
        master_map[str(cid)] = float(line.get("daily_kg") or 0)

    exec_map: dict[str, float] = {}
    for line in execution_lines:
        cid = line.get("component_id")
        if not cid:
            continue
        exec_map[str(cid)] = float(line.get("daily_kg_total") or 0)

    all_ids = set(master_map) | set(exec_map)
    diff_lines = []
    has_changes = False
    for cid in sorted(all_ids):
        m = master_map.get(cid)
        e = exec_map.get(cid)
        reasons = []
        if m is None:
            reasons.append("missing_in_master")
            has_changes = True
        if e is None:
            reasons.append("missing_in_execution")
            has_changes = True
        if m is not None and e is not None and abs(m - e) > DIFF_TOLERANCE_KG:
            reasons.append("kg_mismatch")
            has_changes = True
        if reasons:
            diff_lines.append(
                {
                    "component_id": cid,
                    "master_kg": m,
                    "execution_kg": e,
                    "reasons": reasons,
                }
            )
    return {"has_changes": has_changes, "lines": diff_lines}