"""
Create the 3 JEI_fedex_* collections in PocketBase.

Collections:
  JEI_fedex_import_batches  - one per import batch (date, vat, duties, status)
  JEI_fedex_shipments       - links invoice <-> batch with waybill_no + fedex_ref_no
  JEI_fedex_batch_documents - documents (Waybill/SAD500/SAD507/BillOfEntry) per batch

Idempotent: skips a collection if it already exists.

Run: python scripts/create_fedex_collections.py
"""
import os, sys, json, urllib.request
from urllib.error import HTTPError

PB_URL = os.environ.get("PB_URL", "https://pb.agent.apphub.co.za")
PB_TOKEN = None
env_path = os.path.join(os.path.dirname(__file__), "..", ".env.local")
if os.path.exists(env_path):
    for line in open(env_path):
        if line.startswith("PB_TOKEN="):
            PB_TOKEN = line.strip().split("=", 1)[1]
if not PB_TOKEN:
    sys.exit("PB_TOKEN missing")
H = {"Authorization": PB_TOKEN, "Content-Type": "application/json"}

SUPERUSER_RULES = {"listRule": "", "viewRule": "", "createRule": "",
                   "updateRule": "", "deleteRule": ""}


def pb_get(path):
    r = urllib.request.Request(PB_URL + path, headers=H, method="GET")
    with urllib.request.urlopen(r, timeout=30) as resp:
        return json.loads(resp.read())


def pb_post(path, body):
    data = json.dumps(body).encode("utf-8")
    r = urllib.request.Request(PB_URL + path, data=data, headers=H, method="POST")
    try:
        with urllib.request.urlopen(r, timeout=30) as resp:
            return json.loads(resp.read()), None
    except HTTPError as e:
        return None, json.loads(e.read())


def find_col(name):
    items = pb_get("/api/collections?perPage=200")["items"]
    return next((c for c in items if c["name"] == name), None)


def ensure(name, factory):
    existing = find_col(name)
    if existing:
        print(f"EXISTS: {name}")
        return existing
    result, err = pb_post("/api/collections", factory())
    if err:
        sys.exit(f"ERROR creating {name}: {err}")
    print(f"CREATED: {name} (id={result['id']})")
    return result


def batches_schema():
    # NOTE: PB v0.39.8 quirk — select options go at field root, NOT in `options`
    return {
        "name": "JEI_fedex_import_batches",
        "type": "base",
        "fields": [
            {"name": "import_date", "type": "date", "required": True, "options": {"min": "", "max": ""}},
            {"name": "vat_paid", "type": "number", "required": False, "options": {"min": 0, "max": None, "noDecimal": False}},
            {"name": "duties_paid", "type": "number", "required": False, "options": {"min": 0, "max": None, "noDecimal": False}},
            {"name": "status", "type": "select", "required": True, "maxSelect": 1, "values": ["pending", "imported", "cancelled"]},
            {"name": "notes", "type": "text", "required": False, "options": {"min": 0, "max": 2000, "pattern": ""}},
        ],
        **SUPERUSER_RULES,
    }


def shipments_schema(invoices_id, batches_id):
    # PB v0.39.8 quirk: relation fields need collectionId/cascadeDelete at root,
    # not inside options
    return {
        "name": "JEI_fedex_shipments",
        "type": "base",
        "fields": [
            {"name": "invoice", "type": "relation", "required": True, "collectionId": invoices_id, "cascadeDelete": False, "minSelect": 1, "maxSelect": 1},
            {"name": "batch", "type": "relation", "required": True, "collectionId": batches_id, "cascadeDelete": True, "minSelect": 1, "maxSelect": 1},
            {"name": "waybill_no", "type": "text", "required": False, "options": {"min": 0, "max": 100, "pattern": ""}},
            {"name": "fedex_ref_no", "type": "text", "required": False, "options": {"min": 0, "max": 100, "pattern": ""}},
            {"name": "notes", "type": "text", "required": False, "options": {"min": 0, "max": 1000, "pattern": ""}},
        ],
        **SUPERUSER_RULES,
    }


def documents_schema(batches_id):
    return {
        "name": "JEI_fedex_batch_documents",
        "type": "base",
        "fields": [
            {"name": "batch", "type": "relation", "required": True, "collectionId": batches_id, "cascadeDelete": True, "minSelect": 1, "maxSelect": 1},
            {"name": "doc_type", "type": "select", "required": True, "maxSelect": 1, "values": ["waybill", "sad500", "sad507", "bill_of_entry"]},
            {"name": "file", "type": "file", "required": False, "options": {"maxSelect": 1, "maxSize": 0, "mimeTypes": ["application/pdf", "image/png", "image/jpeg"], "thumbs": []}},
            {"name": "notes", "type": "text", "required": False, "options": {"min": 0, "max": 500, "pattern": ""}},
        ],
        **SUPERUSER_RULES,
    }


def main():
    print(f"PB_URL: {PB_URL}")
    inv = find_col("JEI_invoices")
    if not inv:
        sys.exit("JEI_invoices not found - run scripts/create_collections.py first")
    b = ensure("JEI_fedex_import_batches", batches_schema)
    s = ensure("JEI_fedex_shipments", lambda: shipments_schema(inv["id"], b["id"]))
    d = ensure("JEI_fedex_batch_documents", lambda: documents_schema(b["id"]))
    print("DONE: 3 JEI_fedex_* collections ready.")


if __name__ == "__main__":
    main()