import { License, User, AuditLog, Contact, NotificationGroup, AppSettings, AIInsight } from './types';
import { GoogleGenAI, Type } from "@google/genai";

const API_URL = 'api.php';

export const DEFAULT_SETTINGS: AppSettings = {
    fiscal_start_month: 4, alert_days: 45, smtp_host: '', smtp_port: '465', 
    smtp_user: '', smtp_pass: '', smtp_from: '', azure_enabled: false, 
    azure_tenant_id: '', azure_client_id: '', azure_client_secret: '',
    ldap_enabled: false, ldap_host: '', ldap_port: '389', ldap_base_dn: '',
    ldap_bind_dn: '', ldap_bind_pass: '', ldap_user_filter: '', allow_local_login: true
};

async function handleResponse(response: Response) {
    const text = await response.text();
    let json;
    try { 
        json = text ? JSON.parse(text) : null; 
    } catch(e) { 
        console.error("Failed to parse JSON response. Status:", response.status, "Text:", text.substring(0, 100));
        json = null; 
    }
    
    if (!response.ok) {
        const errorMsg = json?.error || `Server Error (${response.status}): ${text.substring(0, 50)}`;
        throw new Error(errorMsg);
    }
    return json;
}

export const checkSession = async () => handleResponse(await fetch(`${API_URL}?action=check_session`));
export const login = async (username: string, password: string, authSource: string = 'local') => 
    handleResponse(await fetch(`${API_URL}?action=login`, { 
        method: 'POST', 
        headers: { 'Content-Type': 'application/json' }, 
        body: JSON.stringify({ username, password, authSource }) 
    }));

export const logout = async () => handleResponse(await fetch(`${API_URL}?action=logout`));
export const fetchLicenses = async () => handleResponse(await fetch(`${API_URL}?action=list`));
export const fetchSettings = async () => handleResponse(await fetch(`${API_URL}?action=settings_get`));

export const saveLicense = async (license: any) => {
    return handleResponse(await fetch(`${API_URL}?action=save`, { 
        method: 'POST', 
        headers: { 'Content-Type': 'application/json' }, 
        body: JSON.stringify(license) 
    }));
};

export const deleteLicense = async (id: string) => handleResponse(await fetch(`${API_URL}?action=delete&id=${id}`, { method: 'POST' }));
export const saveSettings = async (settings: AppSettings) => handleResponse(await fetch(`${API_URL}?action=settings_save`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(settings) }));

export const fetchUsers = async () => handleResponse(await fetch(`${API_URL}?action=users_list`));
export const createUser = async (u: any) => handleResponse(await fetch(`${API_URL}?action=users_create`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(u) }));
export const updateUser = async (id: number, u: any) => handleResponse(await fetch(`${API_URL}?action=users_update&id=${id}`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(u) }));
export const deleteUser = async (id: number) => handleResponse(await fetch(`${API_URL}?action=users_delete&id=${id}`, { method: 'POST' }));

export const fetchGroups = async () => handleResponse(await fetch(`${API_URL}?action=groups_list`));
export const saveGroup = async (g: any) => handleResponse(await fetch(`${API_URL}?action=groups_save`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(g) }));
export const deleteGroup = async (id: number) => handleResponse(await fetch(`${API_URL}?action=groups_delete&id=${id}`, { method: 'POST' }));

export const fetchContacts = async () => handleResponse(await fetch(`${API_URL}?action=contacts_list`));
export const saveContact = async (c: any) => handleResponse(await fetch(`${API_URL}?action=contacts_save`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(c) }));
export const deleteContact = async (id: number) => handleResponse(await fetch(`${API_URL}?action=contacts_delete&id=${id}`, { method: 'POST' }));

export const fetchLogs = async () => handleResponse(await fetch(`${API_URL}?action=logs_list`));

export async function getAIInsights(license: License): Promise<AIInsight> {
    try {
        const ai = new GoogleGenAI({ apiKey: process.env.API_KEY });
        const res = await ai.models.generateContent({
            model: 'gemini-3-pro-preview',
            contents: `Analyze this license for procurement risks: ${license.licenseName}, Vendor: ${license.vendorName}. Return JSON with status (saving/warning/neutral), advice, and suggested_alternatives.`,
            config: { 
              responseMimeType: 'application/json',
              responseSchema: {
                type: Type.OBJECT,
                properties: {
                  status: { type: Type.STRING },
                  advice: { type: Type.STRING },
                  suggested_alternatives: { type: Type.ARRAY, items: { type: Type.STRING } }
                },
                required: ["status", "advice", "suggested_alternatives"]
              }
            }
        });
        return JSON.parse(res.text || '{}');
    } catch (e) { 
        return { status: 'neutral', advice: "Advice unavailable.", suggested_alternatives: [] }; 
    }
}
export const deleteFile = async (id: number) => handleResponse(await fetch(`${API_URL}?action=file_delete&id=${id}`, { method: 'POST' }));
export const exportDatabase = async () => handleResponse(await fetch(`${API_URL}?action=export`));
export const importDatabase = async (json: string) => handleResponse(await fetch(`${API_URL}?action=import`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: json }));
export const sendTestEmail = async (email: string) => handleResponse(await fetch(`${API_URL}?action=test_email`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ email }) }));
export const runNotifications = async () => handleResponse(await fetch(`${API_URL}?action=run_notifications`));
export const getAzureLoginUrl = async () => ({ url: '#' });
export const resetPassword = async (token: string, password: string) => handleResponse(await fetch(`${API_URL}?action=reset_password`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ token, password }) }));