from django.contrib import admin

from .models import (
    Account,
    Customer,
    Invoice,
    InvoiceItem,
    LedgerEntry,
    LedgerInstallment,
    Product,
    StockMovement,
    Transaction,
)


@admin.register(Account)
class AccountAdmin(admin.ModelAdmin):
    list_display = ("code", "name", "level", "account_type", "parent", "is_system", "is_active")
    list_filter = ("level", "account_type", "is_system", "is_active")
    search_fields = ("code", "name", "user__phone")
    autocomplete_fields = ["parent"]


@admin.register(Customer)
class CustomerAdmin(admin.ModelAdmin):
    list_display = ("name", "phone", "outstanding_balance", "total_purchases_count", "last_purchase_date")
    search_fields = ("name", "phone", "user__phone")
    readonly_fields = (
        "total_purchases_count", "total_purchase_amount", "last_purchase_date", "outstanding_balance",
    )


@admin.register(LedgerEntry)
class LedgerEntryAdmin(admin.ModelAdmin):
    list_display = ("title", "entry_type", "category", "amount", "entry_date", "counterparty_name")
    list_filter = ("entry_type", "category")
    search_fields = ("title", "counterparty_name", "counterparty_phone", "user__phone")


@admin.register(LedgerInstallment)
class LedgerInstallmentAdmin(admin.ModelAdmin):
    list_display = ("ledger_entry", "amount", "paid_date", "reference")
    search_fields = ("reference", "ledger_entry__title")


@admin.register(Product)
class ProductAdmin(admin.ModelAdmin):
    list_display = ("name", "sku", "category", "quantity", "unit", "unit_price", "total_purchase_value")
    list_filter = ("category",)
    search_fields = ("name", "sku", "user__phone")
    readonly_fields = ("total_purchase_value",)


@admin.register(StockMovement)
class StockMovementAdmin(admin.ModelAdmin):
    list_display = ("product", "delta", "quantity_after", "note", "created_at")
    search_fields = ("product__name",)


class InvoiceItemInline(admin.TabularInline):
    model = InvoiceItem
    extra = 0


@admin.register(Invoice)
class InvoiceAdmin(admin.ModelAdmin):
    list_display = (
        "invoice_number", "buyer_name", "final_amount", "payment_type", "payment_status", "order_status",
        "invoice_date",
    )
    list_filter = ("payment_type", "payment_status", "order_status")
    search_fields = ("invoice_number", "buyer_name", "buyer_phone", "user__phone")
    inlines = [InvoiceItemInline]


@admin.register(Transaction)
class TransactionAdmin(admin.ModelAdmin):
    list_display = (
        "transaction_number", "transaction_type", "debit_account", "credit_account", "amount", "transaction_date",
    )
    list_filter = ("transaction_type",)
    search_fields = ("transaction_number", "description", "user__phone")