import { getToken } from "./auth";

const API_URL = process.env.NEXT_PUBLIC_API_URL || "http://localhost:8521";

export interface ApiUser {
    id: string;
    name: string;
    email: string;
    identifier: string;
    phone?: string;
    role: string;
    status: string;
    created_at: string;
}

export interface ApiCompany {
    id: string;
    name: string;
    slug: string;
    email?: string;
    phone?: string;
    website?: string;
    address?: string;
    active: boolean;
    verified: boolean;
    created_at: string;
}

async function apiRequest<T>(
    endpoint: string,
    options: RequestInit = {}
): Promise<T> {
    const token = getToken();

    // Sanitize API_URL: remove trailing slash
    let baseUrl = API_URL.replace(/\/+$/, "");

    // Sanitize endpoint: ensure leading slash
    let cleanEndpoint = endpoint.startsWith("/") ? endpoint : `/${endpoint}`;

    // Detect and fix double prefixing of /api/v1
    // Case 1: BaseURL ends with /api/v1 AND endpoint starts with /api/v1
    if (baseUrl.endsWith("/api/v1") && cleanEndpoint.startsWith("/api/v1")) {
        cleanEndpoint = cleanEndpoint.replace("/api/v1", "");
    }

    // Case 2: Double /api/v1 inside endpoint itself (if passed incorrectly)
    if (cleanEndpoint.includes("/api/v1/api/v1")) {
        cleanEndpoint = cleanEndpoint.replace("/api/v1/api/v1", "/api/v1");
    }

    const url = `${baseUrl}${cleanEndpoint}`;
    console.log(`[API Request] ${url}`); // Debug log

    const res = await fetch(url, {
        ...options,
        headers: {
            "Content-Type": "application/json",
            ...(token && { Authorization: `Bearer ${token}` }),
            ...options.headers,
        },
    });

    if (!res.ok) {
        const error = await res.text();
        throw new Error(error || `API Error: ${res.status}`);
    }

    return res.json();
}

// Users API
export const usersApi = {
    list: () => apiRequest<ApiUser[]>("/api/v1/users"),

    create: (data: { name: string; email: string; password: string; role: string }) =>
        apiRequest<ApiUser>("/api/v1/users", {
            method: "POST",
            body: JSON.stringify(data),
        }),

    delete: (id: string) =>
        apiRequest<void>(`/api/v1/users/${id}`, {
            method: "DELETE",
        }),
};

// Companies API
export const companiesApi = {
    list: () => apiRequest<ApiCompany[]>("/api/v1/companies"),

    create: (data: { name: string; slug: string; email?: string }) =>
        apiRequest<ApiCompany>("/api/v1/companies", {
            method: "POST",
            body: JSON.stringify(data),
        }),
};

// Jobs API (public)
export interface ApiJob {
    id: number;
    companyId: number;
    createdBy: number;
    title: string;
    description: string;
    salaryMin?: number;
    salaryMax?: number;
    salaryType?: string;
    employmentType?: string;
    workMode?: string;
    workingHours?: string;
    location?: string;
    regionId?: number;
    cityId?: number;
    requirements?: Record<string, unknown> | string[];
    benefits?: Record<string, unknown> | string[];
    visaSupport: boolean;
    languageLevel?: string;
    status: string;
    createdAt: string;
    updatedAt: string;
    companyName?: string;
    companyLogoUrl?: string;
    regionName?: string;
    cityName?: string;
}

export interface PaginatedResponse<T> {
    data: T[];
    pagination: {
        page: number;
        limit: number;
        total: number;
    };
}

export const jobsApi = {
    list: (params?: { page?: number; limit?: number; companyId?: number }) => {
        const query = new URLSearchParams();
        if (params?.page) query.set('page', String(params.page));
        if (params?.limit) query.set('limit', String(params.limit));
        if (params?.companyId) query.set('companyId', String(params.companyId));
        const queryStr = query.toString();
        return apiRequest<PaginatedResponse<ApiJob>>(`/jobs${queryStr ? `?${queryStr}` : ''}`);
    },

    getById: (id: number) => apiRequest<ApiJob>(`/jobs/${id}`),
};

// Transform API job to frontend Job format
export function transformApiJobToFrontend(apiJob: ApiJob): import('./types').Job {
    // Format salary
    let salary: string | undefined;
    if (apiJob.salaryMin && apiJob.salaryMax) {
        salary = `R$ ${apiJob.salaryMin.toLocaleString('pt-BR')} - R$ ${apiJob.salaryMax.toLocaleString('pt-BR')}`;
    } else if (apiJob.salaryMin) {
        salary = `A partir de R$ ${apiJob.salaryMin.toLocaleString('pt-BR')}`;
    } else if (apiJob.salaryMax) {
        salary = `Até R$ ${apiJob.salaryMax.toLocaleString('pt-BR')}`;
    }

    // Determine type
    type JobType = 'full-time' | 'part-time' | 'contract' | 'Remoto' | 'Tempo Integral';
    let type: JobType = 'Tempo Integral';
    if (apiJob.employmentType === 'full-time') type = 'Tempo Integral';
    else if (apiJob.employmentType === 'part-time') type = 'part-time';
    else if (apiJob.employmentType === 'contract') type = 'contract';
    else if (apiJob.location?.toLowerCase().includes('remoto')) type = 'Remoto';

    // Extract requirements
    const requirements: string[] = [];
    if (apiJob.requirements) {
        if (Array.isArray(apiJob.requirements)) {
            requirements.push(...apiJob.requirements.map(String));
        } else if (typeof apiJob.requirements === 'object') {
            Object.values(apiJob.requirements).forEach(v => requirements.push(String(v)));
        }
    }

    return {
        id: String(apiJob.id),
        title: apiJob.title,
        company: apiJob.companyName || 'Empresa',
        location: apiJob.location || apiJob.cityName || 'Localização não informada',
        type,
        workMode: apiJob.workMode as any,
        salary,
        description: apiJob.description,
        requirements: requirements.length > 0 ? requirements : ['Ver detalhes'],
        postedAt: apiJob.createdAt?.split('T')[0] || new Date().toISOString().split('T')[0],
    };
}