import { defineStore } from "pinia"
import { GET, POST } from "../api";
import { useBudgetsStore } from "./budget";
import { useSessionStore } from "./session";
import { useTransactionsStore } from "./transactions";

interface State {
    Accounts: Map<string, Account>
    CurrentAccountID: string | null
    Categories: Map<string, Category>
    Months: Map<number, Map<number, Map<string, Category>>>
    Assignments: []
}

export interface Account {
    ID: string
    Name: string
    OnBudget: boolean
    ClearedBalance: number
    WorkingBalance: number
    ReconciledBalance: number
    Transactions: string[]
    LastReconciled: Date
}

export interface Category {
    ID: string
    Group: string
    Name: string
    AvailableLastMonth: number
    Assigned: number
    Activity: number
    Available: number
}

export const useAccountStore = defineStore("budget/account", {
    state: (): State => ({
        Accounts: new Map<string, Account>(),
        CurrentAccountID: null,
        Months: new Map<number, Map<number, Map<string, Category>>>(),
        Categories: new Map<string, Category>(),
        Assignments: [],
    }),
    getters: {
        AccountsList(state) {
            return [...state.Accounts.values()];
        },
        AllCategoriesForMonth: (state) => (year: number, month: number) => {
            const yearMap = state.Months.get(year);
            const monthMap = yearMap?.get(month);
            return [...monthMap?.values() || []];
        },
        CategoryGroupsForMonth(state) {
            return (year: number, month: number) => {
                const categories = this.AllCategoriesForMonth(year, month);
                const categoryGroups = [];
                let prev = undefined;
                for (const category of categories) {
                    if (category.Group != prev)
                        categoryGroups.push({
                            Name: category.Group,
                            Expand: category.Group != "Hidden Categories",
                        });
                    prev = category.Group;
                }
                return categoryGroups;
            }
        },
        CategoriesForMonthAndGroup(state) {
            return (year: number, month: number, group: string) => {
                const categories = this.AllCategoriesForMonth(year, month);
                return categories.filter(x => x.Group == group);
            }
        },
        GetAccount(state) {
            return (accountid: string) => {
                return this.Accounts.get(accountid);
            }
        },
        CurrentAccount(state): Account | undefined {
            if (state.CurrentAccountID == null)
                return undefined;

            return this.GetAccount(state.CurrentAccountID);
        },
        OnBudgetAccounts(state) {
            return [...state.Accounts.values()].filter(x => x.OnBudget);
        },
        OnBudgetAccountsBalance(state): number {
            return this.OnBudgetAccounts.reduce((prev, curr) => prev + Number(curr.ClearedBalance), 0);
        },
        OffBudgetAccounts(state) {
            return [...state.Accounts.values()].filter(x => !x.OnBudget);
        },
        OffBudgetAccountsBalance(state): number {
            return this.OffBudgetAccounts.reduce((prev, curr) => prev + Number(curr.ClearedBalance), 0);
        },
    },
    actions: {
        async SetCurrentAccount(budgetid: string, accountid: string) {
            if (budgetid == null)
                return;

            this.CurrentAccountID = accountid;

            if (accountid == null)
                return;
            const account = this.GetAccount(accountid)!;
            useSessionStore().setTitle(account.Name);
            await this.FetchAccount(account);
        },
        async FetchAccount(account: Account) {
            const result = await GET("/account/" + account.ID + "/transactions");
            const response = await result.json();
            const transactionsStore = useTransactionsStore()
            const transactions = transactionsStore.AddTransactions(response.Transactions);
            account.Transactions = transactions;
        },
        async FetchMonthBudget(budgetid: string, year: number, month: number) {
            const result = await GET("/budget/" + budgetid + "/" + year + "/" + (month+1));
            const response = await result.json();
            if (response.Categories == undefined || response.Categories.length <= 0)
                return;
            this.addCategoriesForMonth(year, month, response.Categories);
        },
        async EditAccount(accountid: string, name: string, onBudget: boolean) {
            const result = await POST("/account/" + accountid, JSON.stringify({ name: name, onBudget: onBudget }));
            const response = await result.json();
            useBudgetsStore().MergeBudgetingData(response);
        },
        addCategoriesForMonth(year: number, month: number, categories: Category[]): void {
            this.$patch((state) => {
                const yearMap = state.Months.get(year) || new Map<number, Map<string, Category>>();
                const monthMap = yearMap.get(month) || new Map<string, Category>();
                for (const category of categories) {
                    monthMap.set(category.ID, category);
                }

                yearMap.set(month, monthMap);
                state.Months.set(year, yearMap);
            });
        },
        logout() {
            this.$reset()
        },
    }

})