import { fetchLemfiRate } from "../../../utils/lemfi.js";

const COMMON_HEADERS = {
    'accept': '*/*',
    'accept-language': 'en-GB,en-US;q=0.9,en;q=0.8',
    'sec-ch-ua-mobile': '?0',
    'sec-ch-ua-platform': '"macOS"',
    'sec-fetch-dest': 'empty',
    'sec-fetch-mode': 'cors',
    'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36'
};

const createTapTapHeaders = () => {
    const headers = new Headers();
    Object.entries(COMMON_HEADERS).forEach(([key, value]) => headers.append(key, value));
    headers.append('authority', 'api.taptapsend.com');
    headers.append('appian-version', 'web/2022-05-03.0');
    headers.append('origin', 'https://www.taptapsend.com');
    headers.append('referer', 'https://www.taptapsend.com/');
    headers.append('sec-ch-ua', '"Google Chrome";v="119", "Chromium";v="119", "Not?A_Brand";v="24"');
    headers.append('sec-fetch-site', 'same-site');
    headers.append('x-device-id', 'web');
    headers.append('x-device-model', 'web');
    headers.append('Cookie', 'SESSION=NTI4ZGZmOGEtZGZkNS00ZGUwLWE2MmYtMDA4OWNjZGZlZjkx');
    return headers;
};

const createFlutterwaveHeaders = () => {
    const headers = new Headers();
    Object.entries(COMMON_HEADERS).forEach(([key, value]) => headers.append(key, value));
    headers.append('authority', 'sendgateway.myflutterwave.com');
    headers.append('accept', 'application/json, text/plain, */*');
    headers.append('origin', 'https://send.flutterwave.com');
    headers.append('referer', 'https://send.flutterwave.com/');
    headers.append('sec-ch-ua', '"Not.A/Brand";v="8", "Chromium";v="114", "Google Chrome";v="114"');
    headers.append('sec-fetch-site', 'cross-site');
    headers.append('user-agent', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36');
    return headers;
};

const createNalaHeaders = () => {
    const headers = new Headers();
    Object.entries(COMMON_HEADERS).forEach(([key, value]) => headers.append(key, value));
    headers.append('accept-language', 'en-GB,en;q=0.9,nl-NL;q=0.8,nl;q=0.7,en-US;q=0.6');
    headers.append('origin', 'https://www.nala.com');
    headers.append('priority', 'u=1, i');
    headers.append('referer', 'https://www.nala.com/');
    headers.append('sec-ch-ua', '"Not/A)Brand";v="8", "Chromium";v="126", "Google Chrome";v="126"');
    headers.append('sec-fetch-site', 'cross-site');
    headers.append('user-agent', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36');
    return headers;
};

const createAfriexHeaders = () => {
    const headers = new Headers();
    Object.entries(COMMON_HEADERS).forEach(([key, value]) => headers.append(key, value));
    headers.append('accept-language', 'en-GB,en;q=0.9,nl-NL;q=0.8,nl;q=0.7,en-US;q=0.6');
    headers.append('if-none-match', 'W/"acc-nnqCARN36oEAk9YJsCdpfbMyZVQ"');
    headers.append('origin', 'https://www.afriex.com');
    headers.append('priority', 'u=1, i');
    headers.append('referer', 'https://www.afriex.com/');
    headers.append('sec-ch-ua', '"Not;A=Brand";v="99", "Google Chrome";v="139", "Chromium";v="139"');
    headers.append('sec-fetch-site', 'cross-site');
    headers.append('user-agent', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36');
    return headers;
};

const createDefaultErrorResponse = (provider, href) => ({
    rate: 0,
    provider,
    bestRate: false,
    href
});

export default async (req, res) => {
    let rates = [];

    const tapTapCall = fetch(
        "https://api.taptapsend.com/api/fxRates",
        {
            method: "GET",
            headers: createTapTapHeaders(),
            redirect: "follow",
        }
    )
        .then((response) => response.json())
        .then((result) => {
            const nlRates = result.availableCountries.find((availableCountry) => {
                return availableCountry.isoCountryCode === "NL"
            });
            let fxRate = 0;
            if (nlRates) {
                for (let corridor of nlRates.corridors) {
                    if (corridor.isoCountryCode === "NG") {
                        fxRate = corridor.fxRate;
                        break;
                    }
                }
            }
            return {
                rate: fxRate,
                provider: "TapTap",
                bestRate: false,
                href: "https://www.taptapsend.com/",
                logo: "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSFcB9ECgZxEULIhxf-PZWEn23UPZATQZblQQ&s"
            };
        })
        .catch((error) => {
            console.error("Error calling TapTap:", error);
            return createDefaultErrorResponse("TapTap", "https://www.taptapsend.com/");
        });

    const sendCall = fetch(
        "https://sendgateway.myflutterwave.com/api/v1/config/getcurrencyrate?fromCurrency=EUR&toCurrency=NGN",
        {
            method: "GET",
            headers: createFlutterwaveHeaders(),
            redirect: "follow",
        }
    )
        .then((response) => response.json())
        .then((response) => {
            return {
                rate: parseFloat(response.data[0].baseRate).toFixed(2),
                provider: "Send",
                bestRate: false,
                href: "https://send.flutterwave.com/",
                logo: "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRyhQXYEg8iHCMajGdJn0B0FxwsuzAfkSeBgQ&s"
            };
        })
        .catch((error) => {
            console.error("Error calling Send:", error);
            return createDefaultErrorResponse("Send", "https://send.flutterwave.com/");
        });

    // Ace Transfer temporarily disabled due to Cloudflare protection
    // Will return a default response to avoid blocking the API
    const aceCall = Promise.resolve(
        createDefaultErrorResponse("Ace Transfer", "https://acemoneytransfer.com/referral-link/3056004")
    );

    const remitlyCall = new Promise((resolve, reject) => {
        fetch("https://api.remitly.io/v5/pricing/estimates?amount=1%20EUR&anchor=SEND&conduit=NLD%3AEUR-NGA%3ANGN&purpose=OTHER", {
            headers: {
                accept: "application/json",
            },
            referrerPolicy: "no-referrer",
            body: null,
            method: "GET",
            mode: "cors",
            credentials: "omit"
        }).then(result => resolve(result.json())).catch(error => reject(error));
    })
        .then((result) => {
            return {
                rate: parseFloat(result[0].exchange_rate_info.base_rate).toFixed(2),
                provider: "Remitly",
                bestRate: false,
                href: "https://remit.ly/94fqcne9",
                logo: "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRNZm0irEt8u6LXo-OFXZ9bcTchNoSeaDDnsA&s"
            };
        })
        .catch((error) => {
            console.error("Error calling Remitly:", error);
            return createDefaultErrorResponse("Remitly", "https://remit.ly/94fqcne9");
        });

    const nalaCall = new Promise((resolve, reject) => {
        fetch("https://partners-api.prod.nala-api.com/v1/fx/rates", {
            method: "GET",
            headers: createNalaHeaders(),
            redirect: "follow"
        })
            .then((response) => resolve(response.json()))
            .catch((error) => reject(error));
    })
        .then((result) => {
            const nalaRates = result.data.find(
                (data) => {
                    return data.source_currency === "EUR" && data.destination_currency === "NGN"
                }
            );
            return {
                rate: parseFloat(nalaRates.rate).toFixed(2),
                provider: "Nala",
                bestRate: false,
                href: "https://join.iwantnala.com/JESSE-715106",
                logo: "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRpbV0MWgCocA3dFuWoxgCmQsxGfqRuttbD3w&s"
            };
        })
        .catch((error) => {
            console.error("Error calling Nala:", error);
            return createDefaultErrorResponse("Nala", "https://join.iwantnala.com/JESSE-715106");
        });


    const lemfiHref = "https://lemfi.com/en-gb/international-money-transfer";
    const lemfiProvider = "LemFi (referral code - OBIN6518)";
    const lemfiCall = fetchLemfiRate()
        .then((rate) => ({
            rate: rate.toFixed(2),
            provider: lemfiProvider,
            bestRate: false,
            href: lemfiHref,
            logo: "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSMYTBiPB_joupdSSoBL1fA0wySDPcMpY92XQ&s"
        }))
        .catch((error) => {
            console.error("Error calling LemFi:", error);
            return createDefaultErrorResponse(lemfiProvider, lemfiHref);
        });

    const afriexCall = new Promise((resolve, reject) => {
        fetch("https://prod.afx-server.com/v2/public/rates?base=EUR", {
            method: "GET",
            headers: createAfriexHeaders(),
            redirect: "follow"
        })
            .then((response) => resolve(response.json()))
            .catch((error) => reject(error));
    })
        .then((result) => {
            // Afriex now rejects unauthenticated requests with {"message":"Device id missing"}
            const ngnRate = result?.rates?.EUR?.NGN;
            if (!ngnRate) {
                throw new Error(`Unexpected response: ${result?.message || JSON.stringify(result).slice(0, 200)}`);
            }
            return {
                rate: parseFloat(ngnRate).toFixed(2),
                provider: "Afriex",
                bestRate: false,
                href: "https://www.afriex.com/",
                logo: "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTvFac7oIDG6QsJlYsBIRnWhFfy0OWjN5Mspg&s"
            };
        })
        .catch((error) => {
            console.error("Error calling Afriex:", error.message);
            return createDefaultErrorResponse("Afriex", "https://www.afriex.com/");
        });

    const wiseCall = new Promise((resolve, reject) => {
        fetch("https://wise.com/gateway/v4/comparisons?payInMethod=BANK_TRANSFER&sendAmount=10&sourceCurrency=EUR&targetCurrency=NGN", {
            headers: {
                accept: "*/*",
                "accept-language": "en-GB,en;q=0.9,nl-NL;q=0.8,nl;q=0.7,en-US;q=0.6",
                "content-type": "application/json",
                priority: "u=1, i",
                "sec-ch-ua": '"Not(A:Brand";v="99", "Google Chrome";v="133", "Chromium";v="133"',
                "sec-ch-ua-mobile": "?0",
                "sec-ch-ua-platform": '"macOS"',
                "sec-fetch-dest": "empty",
                "sec-fetch-mode": "cors",
                "sec-fetch-site": "same-site"
            },
            referrer: "https://wise.com/",
            referrerPolicy: "strict-origin-when-cross-origin",
            body: null,
            method: "GET",
            mode: "cors",
            credentials: "include"
        }).then((response) => {
            return resolve(response.json());
        }).catch((error) => reject(error));
    }).then((result) => {
        const wiseProvider = result.providers.find(provider => provider.alias === "wise");
        if (wiseProvider && wiseProvider.quotes.length > 0) {
            const wiseQuote = wiseProvider.quotes[0];
            return {
                rate: parseFloat(wiseQuote.rate).toFixed(2),
                provider: "Wise",
                bestRate: false,
                href: "https://wise.com/invite/dic/obinnae93",
                logo: "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQ3L26sFmjg2xyW4CJy_5peQt-v0JHgsYhzvA&s"
            };
        } else {
            throw new Error("Wise provider or quotes not found");
        }
    }).catch((error) => {
        console.error("Error calling Wise:", error);
        return createDefaultErrorResponse("Wise", "https://wise.com/invite/dic/obinnae93");
    });

    await Promise.all([
        aceCall,
        tapTapCall,
        remitlyCall,
        nalaCall,
        lemfiCall,
        afriexCall,
        wiseCall,
        sendCall
    ])
        .then(
            ([
                aceResponse,
                tapTapResponse,
                remitlyResponse,
                nalaResponse,
                lemfiResponse,
                afriexResponse,
                wiseResponse,
                sendResponse
            ]) => {
                rates = [
                    aceResponse,
                    tapTapResponse,
                    remitlyResponse,
                    nalaResponse,
                    lemfiResponse,
                    afriexResponse,
                    wiseResponse,
                    sendResponse
                ];
            }
        )
        .catch((error) => {
            console.error("Error in Promise.all:", error);
        });

    const maxRateIndex = rates.reduce(
        (maxIndex, currentObject, currentIndex, array) => {
            const currentRate = parseFloat(currentObject.rate);
            const maxRate = parseFloat(array[maxIndex].rate);
            return currentRate > maxRate ? currentIndex : maxIndex;
        },
        0
    );

    rates.forEach((object, index) => {
        object.bestRate = index === maxRateIndex;
    });

    rates = rates.filter(rate => rate.rate > 0);

    return res.status(200).json(rates);
};