"""Run idempotency, update, and bulk tests against the Dataforth API."""
import json
import urllib.request
import urllib.parse
import hashlib

import os, sys
TOKEN_URL = os.environ.get("CF_TOKEN_URL", "https://login.dataforth.com/connect/token")
API_BASE = os.environ.get("CF_API_BASE", "https://www.dataforth.com") + "/api/v1"
CLIENT_ID = os.environ.get("CF_CLIENT_ID", "")
CLIENT_SECRET = os.environ.get("CF_CLIENT_SECRET", "")
SCOPE = os.environ.get("CF_SCOPE", "dataforth.web")
if not CLIENT_ID or not CLIENT_SECRET:
    sys.exit("set CF_CLIENT_ID + CF_CLIENT_SECRET (vault: clients/dataforth/api-oauth.sops.yaml)")
SAMPLE_DIR = r"D:\claudetools\projects\dataforth-dos\datasheet-pipeline\scmvas-hvas-research\samples\backfill-verify"


def get_token():
    data = urllib.parse.urlencode({
        "grant_type": "client_credentials",
        "client_id": CLIENT_ID,
        "client_secret": CLIENT_SECRET,
        "scope": SCOPE,
    }).encode()
    with urllib.request.urlopen(urllib.request.Request(TOKEN_URL, data=data)) as r:
        return json.loads(r.read())["access_token"]


def api(method, path, token, body=None):
    headers = {"Authorization": f"Bearer {token}"}
    data = None
    if body is not None:
        data = json.dumps(body).encode()
        headers["Content-Type"] = "application/json"
    req = urllib.request.Request(API_BASE + path, data=data, headers=headers, method=method)
    try:
        with urllib.request.urlopen(req) as r:
            return r.status, r.read().decode()
    except urllib.error.HTTPError as e:
        return e.code, e.read().decode()


def read_sample(sn):
    with open(f"{SAMPLE_DIR}\\{sn}-source.txt", "rb") as f:
        return f.read().decode("utf-8", errors="replace")


def sha16(s):
    return hashlib.sha256(s.encode()).hexdigest()[:16]


token = get_token()

# ---------- TEST A: Idempotency ----------
print("=" * 60)
print("TEST A: Idempotency (re-POST 179377-5 with same content)")
print("=" * 60)
content = read_sample("179377-5")
print(f"Content hash[16]: {sha16(content)}")

# Baseline stats
status, body = api("GET", "/TestReportDataFiles/stats", token)
stats_before = json.loads(body)
print(f"Stats before: TotalCount={stats_before['TotalCount']}")

status, body = api("POST", "/TestReportDataFiles", token,
                   {"SerialNumber": "179377-5", "Content": content})
print(f"POST same content -> HTTP {status}  body: {body}")

status, body = api("GET", "/TestReportDataFiles/stats", token)
stats_after = json.loads(body)
print(f"Stats after: TotalCount={stats_after['TotalCount']} (delta {stats_after['TotalCount']-stats_before['TotalCount']})")

status, body = api("GET", "/TestReportDataFiles/179377-5", token)
obj = json.loads(body)
print(f"CreatedAtUtc: {obj.get('CreatedAtUtc')}")
print(f"UpdatedAtUtc: {obj.get('UpdatedAtUtc')}")
print()

# ---------- TEST B: Update ----------
print("=" * 60)
print("TEST B: Update (re-POST 179377-5 with MODIFIED content)")
print("=" * 60)
modified = content + "\n[TEST B MODIFICATION MARKER - WILL BE REVERTED]\n"
print(f"Modified hash[16]: {sha16(modified)} (bytes {len(modified.encode())})")

status, body = api("POST", "/TestReportDataFiles", token,
                   {"SerialNumber": "179377-5", "Content": modified})
print(f"POST modified content -> HTTP {status}  body: {body}")

status, body = api("GET", "/TestReportDataFiles/179377-5", token)
obj = json.loads(body)
fetched = obj.get("Content", "")
print(f"Server bytes after update: {len(fetched.encode())}  hash[16]: {sha16(fetched)}")
print(f"CreatedAtUtc: {obj.get('CreatedAtUtc')}")
print(f"UpdatedAtUtc: {obj.get('UpdatedAtUtc')}  <-- should be non-null now")
print(f"Last line of fetched content: {fetched.rstrip().splitlines()[-1]!r}")
print()

# ---------- TEST B cleanup: restore ----------
print("=" * 60)
print("Restoring 179377-5 to original content")
print("=" * 60)
status, body = api("POST", "/TestReportDataFiles", token,
                   {"SerialNumber": "179377-5", "Content": content})
print(f"POST original content -> HTTP {status}  body: {body}")
status, body = api("GET", "/TestReportDataFiles/179377-5", token)
obj = json.loads(body)
restored_hash = sha16(obj.get("Content", ""))
print(f"Restored hash[16]: {restored_hash} (expect {sha16(content)})")
print(f"Match: {restored_hash == sha16(content)}")
print(f"UpdatedAtUtc: {obj.get('UpdatedAtUtc')}")
print()

# ---------- TEST C: Bulk ----------
print("=" * 60)
print("TEST C: Bulk upload (179377-7, -8, -9)")
print("=" * 60)
items = []
for sn in ["179377-7", "179377-8", "179377-9"]:
    c = read_sample(sn)
    items.append({"SerialNumber": sn, "Content": c})
    print(f"  Staged {sn}: {len(c.encode())} bytes, hash[16]={sha16(c)}")

status, body = api("POST", "/TestReportDataFiles/bulk", token, {"Items": items})
print(f"\nPOST /bulk -> HTTP {status}")
print(f"Response: {body}")
print()

for sn in ["179377-7", "179377-8", "179377-9"]:
    status, body = api("GET", f"/TestReportDataFiles/{sn}", token)
    if status == 200:
        o = json.loads(body)
        local = read_sample(sn)
        match = "MATCH" if sha16(local) == sha16(o.get("Content", "")) else "DIFF"
        print(f"  {sn}: GET {status} content {match}, Created={o.get('CreatedAtUtc')}")
    else:
        print(f"  {sn}: GET {status} body={body}")

# Final stats
status, body = api("GET", "/TestReportDataFiles/stats", token)
stats_final = json.loads(body)
print(f"\nFinal TotalCount: {stats_final['TotalCount']} (started at {stats_before['TotalCount']})")