import api from './axiosInstance.api';

// ============================================================================
// INTERFACES
// ============================================================================

export interface EarthquakeAlert {
    warning_message: string;
    effective_start_time: string;
    depth: string;
    latitude: number;
    longitude: number;
    magnitude: string;
    disaster_type: string;
    direction: string;
    source: string;
    polygons?: Array<{
        intensity: number;
        color: string;
        latitude: number;
        longitude: number;
        radius: number;
        name: string;
        coordinates: {
            type: string;
            coordinates: any;
        };
    }>;
}

export interface NowcastAlert {
    severity: string;
    effective_start_time: string;
    effective_end_time: string;
    area_description: string;
    events: string;
    event_category: string;
    severity_color: string;
    location: {
        coordinates: [number, number]; // [longitude, latitude] in GeoJSON format
        type: string;
    };
    source: string;
    identifier: string;
    state_id: string;
    entry_time: string;
}

export interface GeneralAlert {
    severity: string;
    identifier: number;
    effective_start_time: string;
    effective_end_time: string;
    disaster_type: string;
    area_description: string;
    warning_message: string;
    severity_color: string;
    severity_level: string;
    centroid: string; // "longitude,latitude" format
    alert_source: string;
    area_covered: string;
    sender_org_id: string;
    type: number;
    actual_lang: string;
    disseminated: string;
    alert_id_sdma_autoinc: number;
}

export interface EarthquakeAlertsResponse {
    alerts: EarthquakeAlert[];
}

export interface NowcastAlertsResponse {
    nowcastDetails: NowcastAlert[];
}

export interface AllAlertsResponse {
    earthquakes: EarthquakeAlertsResponse;
    nowcast: NowcastAlertsResponse;
    general: GeneralAlert[];
}

export interface StatewiseFilter {
    event: string;
    Warn_type: string;
    action: string;
    view: string;
    noalert: string;
    sachethead: string;
    localert: string;
    issued_by: string;
    state_wise: string;
    loc_wise: string;
    search_state: string;
    search_loc: string;
    state: string;
    noalert_msg: string;
}

// ============================================================================
// API FUNCTIONS
// ============================================================================

/**
 * Fetch all alerts (earthquakes, nowcast, and general) in a single optimized request
 */
export const getAllAlerts = async (): Promise<AllAlertsResponse> => {
    const response = await api.get<{ success: boolean; data: AllAlertsResponse }>('/sachet/all-alerts');
    return response.data.data;
};

/**
 * Fetch earthquake alerts only
 */
export const getEarthquakeAlerts = async (): Promise<EarthquakeAlertsResponse> => {
    const response = await api.get<{ success: boolean; data: EarthquakeAlertsResponse }>('/sachet/earthquake-alerts');
    return response.data.data;
};

/**
 * Fetch IMD nowcast weather alerts only
 */
export const getNowcastAlerts = async (): Promise<NowcastAlertsResponse> => {
    const response = await api.get<{ success: boolean; data: NowcastAlertsResponse }>('/sachet/nowcast-alerts');
    return response.data.data;
};

/**
 * Fetch general alert details only
 */
export const getGeneralAlerts = async (): Promise<GeneralAlert[]> => {
    const response = await api.get<{ success: boolean; data: GeneralAlert[] }>('/sachet/all-alert-details');
    return response.data.data;
};

/**
 * Fetch statewise filter configuration
 */
export const getStatewiseFilter = async (): Promise<StatewiseFilter> => {
    const response = await api.get<{ success: boolean; data: StatewiseFilter }>('/sachet/statewise-filter');
    return response.data.data;
};

// ============================================================================
// UTILITY FUNCTIONS
// ============================================================================

/**
 * Convert GeoJSON coordinates [lng, lat] to Leaflet format [lat, lng]
 */
export const geoJsonToLeaflet = (coordinates: [number, number]): [number, number] => {
    return [coordinates[1], coordinates[0]];
};

/**
 * Parse centroid string "lng,lat" to Leaflet format [lat, lng]
 */
export const parseCentroid = (centroid: string): [number, number] | null => {
    const coords = centroid.split(',').map(Number);
    if (coords.length !== 2 || coords.some(isNaN)) {
        return null;
    }
    return [coords[1], coords[0]]; // [lat, lng]
};

/**
 * Get severity color for alerts
 */
export const getSeverityColor = (severity: string): string => {
    const colors: { [key: string]: string } = {
        'red': '#ef4444',
        'orange': '#f97316',
        'yellow': '#eab308',
        'green': '#22c55e',
        'EXTREME': '#dc2626',
        'SEVERE': '#f97316',
        'ALERT': '#f97316',
        'WATCH': '#eab308',
    };
    return colors[severity] || colors[severity?.toUpperCase()] || '#6b7280';
};

// ============================================================================
// DEFAULT EXPORT
// ============================================================================

export default {
    getAllAlerts,
    getEarthquakeAlerts,
    getNowcastAlerts,
    getGeneralAlerts,
    getStatewiseFilter,
    geoJsonToLeaflet,
    parseCentroid,
    getSeverityColor,
};