import { defineStore } from "pinia";
import { GET, POST } from "../api";
import { formatDate, groupBy } from "../date";
import { useBudgetsStore } from "./budget";
import { useAccountStore } from "./budget-account";

interface State {
    Transactions: Map<string, Transaction>;
    Reconciling: boolean;
    ProblematicTransactions: Array<string>;
    FilteredTransactions: Array<string>;
}

export interface Transaction {
    ID: string;
    Date: Date;
    TransferAccount: string;
    CategoryGroup: string;
    Category: string;
    CategoryID: string | null;
    Memo: string;
    Status: string;
    GroupID: string;
    Payee: string;
    PayeeID: string | null;
    Amount: number;
    Reconciled: boolean;
    Account: string;
    AccountID: string;
}

export const useTransactionsStore = defineStore("budget/transactions", {
    state: (): State => ({
        Transactions: new Map<string, Transaction>(),
        Reconciling: false,
        ProblematicTransactions: new Array<string>(),
        FilteredTransactions: new Array<string>(),
    }),
    getters: {
        ReconcilingBalance(state): number {
            const accountsStore = useAccountStore();
            let reconciledBalance =
                accountsStore.CurrentAccount!.ReconciledBalance;
            for (const transaction of this.TransactionsList) {
                if (transaction.Reconciled)
                    reconciledBalance += transaction.Amount;
            }
            return reconciledBalance;
        },
        TransactionsByDate(state) : Record<string, Transaction[]> {
            const accountsStore = useAccountStore();
            const accountID = accountsStore.CurrentAccountID;
            const allTransactions = [...this.Transactions.values()].filter(x => x.AccountID == accountID);
            return groupBy(allTransactions, x => formatDate(x.Date));
        },
        TransactionsList(state) : Transaction[] {
            const accountsStore = useAccountStore();
            const accountID = accountsStore.CurrentAccountID;
            const allTransactions = [...this.Transactions.values()];
            return allTransactions.filter(x => x.AccountID == accountID);
        },
        ProblematicTransactionsList(state) : Transaction[] {
            return [...state.ProblematicTransactions.map(x => state.Transactions!.get(x)!)];
        },
        FilteredTransactionsList(state) : Transaction[] {
            return [...state.FilteredTransactions.map(x => state.Transactions!.get(x)!)];
        }
    },
    actions: {
        AddTransactions(transactions: Array<Transaction>) {
            this.$patch(() => {
                for (const transaction of transactions) {
                    transaction.Date = new Date(transaction.Date);
                    this.Transactions.set(transaction.ID, transaction);
                }
            });
        },
        SetReconciledForAllTransactions(value: boolean) {
            for (const transaction of this.TransactionsList) {
                if (transaction.Status == "Reconciled") continue;

                transaction.Reconciled = value;
            }
        },
        async GetProblematicTransactions() {
            const budgetStore = useBudgetsStore();
            const result = await GET("/budget/" + budgetStore.CurrentBudgetID + "/problematic-transactions");
            const response = await result.json();
            const transactions = response.Transactions ?? [];
            this.AddTransactions(transactions);
            this.ProblematicTransactions = [...transactions?.map((x : Transaction) => x.ID)];
        },
        async GetFilteredTransactions(accountID : string | null, categoryID : string | null, payeeID : string | null, fromDate : string, toDate : string) {
            const budgetStore = useBudgetsStore();
            const payload = JSON.stringify({
              categoryId: categoryID,
              payeeId: payeeID,
              accountId: accountID,
              fromDate: fromDate,
              toDate: toDate,
            });
            const result = await POST("/budget/" + budgetStore.CurrentBudgetID + "/filtered-transactions", payload);
            const response = await result.json();
            const transactions = response.Transactions ?? [];
            this.AddTransactions(transactions);
            this.FilteredTransactions = [...transactions.map((x : Transaction) => x.ID)];
        },
        async SubmitReconcilation(reconciliationTransactionAmount: number) {
            const accountsStore = useAccountStore();
            const account = accountsStore.CurrentAccount!;
            const reconciledTransactions = this.TransactionsList.filter(
                (x) => x.Reconciled
            );
            for (const transaction of reconciledTransactions) {
                account.ReconciledBalance += transaction.Amount;
                transaction.Status = "Reconciled";
                transaction.Reconciled = false;
            }
            const result = await POST(
                "/account/" + accountsStore.CurrentAccountID + "/reconcile",
                JSON.stringify({
                    transactionIDs: reconciledTransactions.map((x) => x.ID),
                    reconciliationTransactionAmount:
                        reconciliationTransactionAmount.toString(),
                })
            );
            const response = await result.json();
            const recTrans = response.ReconciliationTransaction;
            if (recTrans) {
                this.AddTransactions([recTrans]);
                account.Transactions.unshift(recTrans.ID);
            }
        },
        logout() {
            this.$reset();
        },
        async saveTransaction(payload: string) {
            const accountsStore = useAccountStore();
            const result = await POST("/transaction/new", payload);
            const response = (await result.json()) as Transaction;
            this.AddTransactions([response]);
            accountsStore.CurrentAccount?.Transactions.unshift(response.ID);
        },
        async editTransaction(transactionid: string, payload: string) {
            const result = await POST("/transaction/" + transactionid, payload);
            const response = (await result.json()) as Transaction;
            this.AddTransactions([response]);
        },
    },
});