"""
Test suite to thoroughly verify the GI accreditation logic, default state,
and CRM approval/rejection sync workflow.
"""
import os
import sys

# Configure minimal in-memory Django environment
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
import django
from django.conf import settings

# Override databases to in-memory SQLite for instantaneous local test execution
settings.DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': ':memory:',
    },
    'product_db': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': ':memory:',
    },
    'seller_db': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': ':memory:',
    }
}

django.setup()

from django.core.management import call_command
from django.contrib.auth.models import User
from api.models import SupplierProfile, SupplierOnboardingDraft
from api.serializers import SupplierProfileSerializer

print("Setting up in-memory database...")
call_command('migrate', verbosity=0)

# ==============================================================================
# TEST 1: Default seller values are Non-GI Craft ('non_gi')
# ==============================================================================
print("\n--- TEST 1: Checking default GI accreditation fields ---")
user1 = User.objects.create(username="artisan_ramesh", email="ramesh@example.com")
profile1 = SupplierProfile.objects.create(
    user=user1,
    store_name="Ramesh Weaves",
    phone="9876543210"
)

assert profile1.gi_seller_type == 'non_gi', f"Expected default 'non_gi', got {profile1.gi_seller_type}"
assert profile1.is_exclusive_gi is False, f"Expected is_exclusive_gi=False, got {profile1.is_exclusive_gi}"
assert profile1.gi_registry_verified is False, f"Expected gi_registry_verified=False, got {profile1.gi_registry_verified}"
assert profile1.gi_certificate_number is None
assert profile1.guild_status is None
print("✓ TEST 1 PASSED: New seller profile defaults to 'non_gi' and unverified.")

# ==============================================================================
# TEST 2: SupplierOnboardingDraft defaults
# ==============================================================================
print("\n--- TEST 2: Checking SupplierOnboardingDraft defaults ---")
draft = SupplierOnboardingDraft.objects.create(
    user=user1,
    phone="9876543210"
)
assert draft.gi_seller_type == 'non_gi', f"Expected default 'non_gi', got {draft.gi_seller_type}"
assert draft.is_exclusive_gi is False, f"Expected is_exclusive_gi=False, got {draft.is_exclusive_gi}"
print("✓ TEST 2 PASSED: SupplierOnboardingDraft defaults to 'non_gi' and False.")

# ==============================================================================
# TEST 3: Serializer serialization of all 5 GI fields
# ==============================================================================
print("\n--- TEST 3: Checking SupplierProfileSerializer output ---")
profile1.gi_seller_type = 'exclusive'
profile1.is_exclusive_gi = True
profile1.gi_certificate_number = 'GI-TN-2005-0012'
profile1.guild_status = 'Kanchipuram Silk Weavers Guild'
profile1.gi_registry_verified = True
profile1.save()

serialized = SupplierProfileSerializer(profile1).data
assert serialized['gi_seller_type'] == 'exclusive', f"Serialized error: {serialized.get('gi_seller_type')}"
assert serialized['is_exclusive_gi'] is True, f"Serialized error: {serialized.get('is_exclusive_gi')}"
assert serialized['gi_certificate_number'] == 'GI-TN-2005-0012', f"Serialized error: {serialized.get('gi_certificate_number')}"
assert serialized['guild_status'] == 'Kanchipuram Silk Weavers Guild', f"Serialized error: {serialized.get('guild_status')}"
assert serialized['gi_registry_verified'] is True, f"Serialized error: {serialized.get('gi_registry_verified')}"
print("✓ TEST 3 PASSED: Serializer correctly exposes all 5 GI accreditation fields.")

# ==============================================================================
# TEST 4: Simulating CRM Product Approval & Seller GI Auto-Upgrade
# ==============================================================================
print("\n--- TEST 4: Verifying CRM Sync Logic ---")
class MockProduct:
    def __init__(self, id, supplier_id, title, is_gi_tagged, gi_tag_name, geographical_origin, status="approved"):
        self.id = id
        self.supplier_id = supplier_id
        self.title = title
        self.is_gi_tagged = is_gi_tagged
        self.gi_tag_name = gi_tag_name
        self.geographical_origin = geographical_origin
        self.status = status
        self.is_active = (status == "approved")

def simulate_crm_sync(seller, products):
    approved_prods = [p for p in products if p.status == "approved" and p.is_active]
    total_approved = len(approved_prods)
    gi_approved = [p for p in approved_prods if p.is_gi_tagged]
    gi_count = len(gi_approved)

    if gi_count > 0:
        first_gi = gi_approved[0]
        gi_name = first_gi.gi_tag_name or "Govt. of India GI Registry Verified"
        if gi_count == total_approved and total_approved > 0:
            seller.gi_seller_type = "exclusive"
            seller.is_exclusive_gi = True
        else:
            seller.gi_seller_type = "mixed"
            seller.is_exclusive_gi = False
        seller.gi_registry_verified = True
        seller.gi_certificate_number = gi_name
        seller.guild_status = first_gi.geographical_origin or "Certified GI Artisan Maker"
    else:
        seller.gi_seller_type = "non_gi"
        seller.is_exclusive_gi = False
        seller.gi_registry_verified = False
    seller.save()

# Scenario 4A: Seller has only standard craft product approved
prods_non_gi = [
    MockProduct(1, profile1.id, "Terracotta Pot", is_gi_tagged=False, gi_tag_name=None, geographical_origin=None, status="approved")
]
simulate_crm_sync(profile1, prods_non_gi)
profile1.refresh_from_db()
assert profile1.gi_seller_type == "non_gi"
assert profile1.is_exclusive_gi is False
assert profile1.gi_registry_verified is False
print("✓ TEST 4A PASSED: Standard non-GI product keeps seller as 'non_gi'.")

# Scenario 4B: Seller has a GI product approved -> Upgrades to 'exclusive'
prods_gi_only = [
    MockProduct(2, profile1.id, "Kanchipuram Silk Saree", is_gi_tagged=True, gi_tag_name="GI Tag #26 (1999)", geographical_origin="Kanchipuram, Tamil Nadu", status="approved")
]
simulate_crm_sync(profile1, prods_gi_only)
profile1.refresh_from_db()
assert profile1.gi_seller_type == "exclusive"
assert profile1.is_exclusive_gi is True
assert profile1.gi_registry_verified is True
assert profile1.gi_certificate_number == "GI Tag #26 (1999)"
print("✓ TEST 4B PASSED: 100% GI approved products upgrades seller to 'exclusive' with verified GI badge.")

# Scenario 4C: Mixed catalog (1 GI product + 1 non-GI product)
prods_mixed = [
    MockProduct(2, profile1.id, "Kanchipuram Silk Saree", is_gi_tagged=True, gi_tag_name="GI Tag #26 (1999)", geographical_origin="Kanchipuram, Tamil Nadu", status="approved"),
    MockProduct(1, profile1.id, "Terracotta Pot", is_gi_tagged=False, gi_tag_name=None, geographical_origin=None, status="approved")
]
simulate_crm_sync(profile1, prods_mixed)
profile1.refresh_from_db()
assert profile1.gi_seller_type == "mixed"
assert profile1.is_exclusive_gi is False
assert profile1.gi_registry_verified is True
print("✓ TEST 4C PASSED: Combination of GI and non-GI products categorizes seller as 'mixed'.")

# Scenario 4D: Admin rejects the GI product -> Reverts to 'non_gi'
prods_rejected = [
    MockProduct(2, profile1.id, "Kanchipuram Silk Saree", is_gi_tagged=True, gi_tag_name="GI Tag #26 (1999)", geographical_origin="Kanchipuram, Tamil Nadu", status="rejected"),
    MockProduct(1, profile1.id, "Terracotta Pot", is_gi_tagged=False, gi_tag_name=None, geographical_origin=None, status="approved")
]
simulate_crm_sync(profile1, prods_rejected)
profile1.refresh_from_db()
assert profile1.gi_seller_type == "non_gi"
assert profile1.is_exclusive_gi is False
assert profile1.gi_registry_verified is False
print("✓ TEST 4D PASSED: Rejection of GI products reverts seller back to 'non_gi'.")

print("\n=======================================================")
print("  ALL 4 TEST SCENARIOS PASSED WITH 100% SUCCESS!  ")
print("=======================================================\n")