import type { SupabaseClient } from '@supabase/supabase-js';
import type { SponsorTier, Sponsor, SponsorDeliverable } from '$lib/supabase/types';
import { createLogger } from '$lib/utils/logger';

const log = createLogger('api.sponsors');

// Helper to cast supabase for tables not yet in generated types
function db(supabase: SupabaseClient) {
	return supabase as any;
}

export const SPONSOR_STATUSES = ['prospect', 'contacted', 'confirmed', 'declined', 'active'] as const;
export type SponsorStatus = (typeof SPONSOR_STATUSES)[number];

export const STATUS_LABELS: Record<string, string> = {
	prospect: 'Prospect',
	contacted: 'Contacted',
	confirmed: 'Confirmed',
	declined: 'Declined',
	active: 'Active',
};

export const STATUS_COLORS: Record<string, string> = {
	prospect: '#94a3b8',
	contacted: '#F59E0B',
	confirmed: '#10B981',
	declined: '#EF4444',
	active: '#6366f1',
};

// ============================================================
// Sponsor Tiers
// ============================================================

export async function fetchSponsorTiers(
	supabase: SupabaseClient,
	departmentId: string
): Promise<SponsorTier[]> {
	const { data, error } = await db(supabase)
		.from('sponsor_tiers')
		.select('*')
		.eq('department_id', departmentId)
		.order('sort_order');

	if (error) {
		log.error('fetchSponsorTiers failed', { error, data: { departmentId } });
		throw error;
	}
	return (data ?? []) as SponsorTier[];
}

export async function createSponsorTier(
	supabase: SupabaseClient,
	departmentId: string,
	name: string,
	amount?: number,
	color?: string
): Promise<SponsorTier> {
	const { data, error } = await db(supabase)
		.from('sponsor_tiers')
		.insert({
			department_id: departmentId,
			name,
			amount: amount ?? 0,
			color: color ?? '#F59E0B',
		})
		.select()
		.single();

	if (error) {
		log.error('createSponsorTier failed', { error, data: { departmentId, name } });
		throw error;
	}
	return data as SponsorTier;
}

export async function updateSponsorTier(
	supabase: SupabaseClient,
	tierId: string,
	params: Partial<Pick<SponsorTier, 'name' | 'amount' | 'color' | 'sort_order'>>
): Promise<SponsorTier> {
	const { data, error } = await db(supabase)
		.from('sponsor_tiers')
		.update(params)
		.eq('id', tierId)
		.select()
		.single();

	if (error) {
		log.error('updateSponsorTier failed', { error, data: { tierId } });
		throw error;
	}
	return data as SponsorTier;
}

export async function deleteSponsorTier(
	supabase: SupabaseClient,
	tierId: string
): Promise<void> {
	const { error } = await db(supabase)
		.from('sponsor_tiers')
		.delete()
		.eq('id', tierId);

	if (error) {
		log.error('deleteSponsorTier failed', { error, data: { tierId } });
		throw error;
	}
}

// ============================================================
// Event-wide Tier + Sponsor fetching
// ============================================================

export async function fetchEventSponsorTiers(
	supabase: SupabaseClient,
	eventId: string
): Promise<SponsorTier[]> {
	const { data, error } = await db(supabase)
		.from('sponsor_tiers')
		.select('*, event_departments!inner(event_id)')
		.eq('event_departments.event_id', eventId)
		.order('sort_order');

	if (error) {
		log.error('fetchEventSponsorTiers failed', { error, data: { eventId } });
		throw error;
	}
	return (data ?? []).map((d: any) => {
		const { event_departments, ...tier } = d;
		return tier;
	}) as SponsorTier[];
}

export async function fetchEventSponsors(
	supabase: SupabaseClient,
	eventId: string
): Promise<Sponsor[]> {
	const { data, error } = await db(supabase)
		.from('sponsors')
		.select('*, event_departments!inner(event_id)')
		.eq('event_departments.event_id', eventId)
		.order('name');

	if (error) {
		log.error('fetchEventSponsors failed', { error, data: { eventId } });
		throw error;
	}
	return (data ?? []).map((d: any) => {
		const { event_departments, ...sponsor } = d;
		return sponsor;
	}) as Sponsor[];
}

export async function fetchEventDeliverables(
	supabase: SupabaseClient,
	eventId: string
): Promise<SponsorDeliverable[]> {
	const { data, error } = await db(supabase)
		.from('sponsor_deliverables')
		.select('*, sponsors!inner(department_id, event_departments!inner(event_id))')
		.eq('sponsors.event_departments.event_id', eventId)
		.order('sort_order');

	if (error) {
		log.error('fetchEventDeliverables failed', { error, data: { eventId } });
		throw error;
	}
	return (data ?? []).map((d: any) => {
		const { sponsors, ...del } = d;
		return del;
	}) as SponsorDeliverable[];
}

// ============================================================
// Sponsors
// ============================================================

export async function fetchSponsors(
	supabase: SupabaseClient,
	departmentId: string
): Promise<Sponsor[]> {
	const { data, error } = await db(supabase)
		.from('sponsors')
		.select('*')
		.eq('department_id', departmentId)
		.order('name');

	if (error) {
		log.error('fetchSponsors failed', { error, data: { departmentId } });
		throw error;
	}
	return (data ?? []) as Sponsor[];
}

export async function createSponsor(
	supabase: SupabaseClient,
	departmentId: string,
	params: {
		name: string;
		tier_id?: string | null;
		contact_name?: string;
		contact_email?: string;
		contact_phone?: string;
		website?: string;
		logo_url?: string;
		status?: SponsorStatus;
		amount?: number;
		notes?: string;
	}
): Promise<Sponsor> {
	const { data, error } = await db(supabase)
		.from('sponsors')
		.insert({
			department_id: departmentId,
			name: params.name,
			tier_id: params.tier_id ?? null,
			contact_name: params.contact_name ?? null,
			contact_email: params.contact_email ?? null,
			contact_phone: params.contact_phone ?? null,
			website: params.website ?? null,
			logo_url: params.logo_url ?? null,
			status: params.status ?? 'prospect',
			amount: params.amount ?? 0,
			notes: params.notes ?? null,
		})
		.select()
		.single();

	if (error) {
		log.error('createSponsor failed', { error, data: { departmentId, name: params.name } });
		throw error;
	}
	return data as Sponsor;
}

export async function updateSponsor(
	supabase: SupabaseClient,
	sponsorId: string,
	params: Partial<Pick<Sponsor, 'name' | 'tier_id' | 'contact_name' | 'contact_email' | 'contact_phone' | 'website' | 'logo_url' | 'status' | 'amount' | 'notes'>>
): Promise<Sponsor> {
	const { data, error } = await db(supabase)
		.from('sponsors')
		.update({ ...params, updated_at: new Date().toISOString() })
		.eq('id', sponsorId)
		.select()
		.single();

	if (error) {
		log.error('updateSponsor failed', { error, data: { sponsorId } });
		throw error;
	}
	return data as Sponsor;
}

export async function deleteSponsor(
	supabase: SupabaseClient,
	sponsorId: string
): Promise<void> {
	const { error } = await db(supabase)
		.from('sponsors')
		.delete()
		.eq('id', sponsorId);

	if (error) {
		log.error('deleteSponsor failed', { error, data: { sponsorId } });
		throw error;
	}
}

// ============================================================
// Sponsor Deliverables
// ============================================================

export async function fetchDeliverables(
	supabase: SupabaseClient,
	sponsorId: string
): Promise<SponsorDeliverable[]> {
	const { data, error } = await db(supabase)
		.from('sponsor_deliverables')
		.select('*')
		.eq('sponsor_id', sponsorId)
		.order('sort_order');

	if (error) {
		log.error('fetchDeliverables failed', { error, data: { sponsorId } });
		throw error;
	}
	return (data ?? []) as SponsorDeliverable[];
}

export async function fetchAllDeliverables(
	supabase: SupabaseClient,
	sponsorIds: string[]
): Promise<SponsorDeliverable[]> {
	if (sponsorIds.length === 0) return [];
	const { data, error } = await db(supabase)
		.from('sponsor_deliverables')
		.select('*')
		.in('sponsor_id', sponsorIds)
		.order('sort_order');

	if (error) {
		log.error('fetchAllDeliverables failed', { error, data: { sponsorIds } });
		throw error;
	}
	return (data ?? []) as SponsorDeliverable[];
}

export async function createDeliverable(
	supabase: SupabaseClient,
	sponsorId: string,
	description: string,
	dueDate?: string
): Promise<SponsorDeliverable> {
	const { data, error } = await db(supabase)
		.from('sponsor_deliverables')
		.insert({
			sponsor_id: sponsorId,
			description,
			due_date: dueDate ?? null,
		})
		.select()
		.single();

	if (error) {
		log.error('createDeliverable failed', { error, data: { sponsorId, description } });
		throw error;
	}
	return data as SponsorDeliverable;
}

export async function updateDeliverable(
	supabase: SupabaseClient,
	deliverableId: string,
	params: Partial<Pick<SponsorDeliverable, 'description' | 'is_completed' | 'due_date' | 'sort_order'>>
): Promise<SponsorDeliverable> {
	const { data, error } = await db(supabase)
		.from('sponsor_deliverables')
		.update({ ...params, updated_at: new Date().toISOString() })
		.eq('id', deliverableId)
		.select()
		.single();

	if (error) {
		log.error('updateDeliverable failed', { error, data: { deliverableId } });
		throw error;
	}
	return data as SponsorDeliverable;
}

export async function deleteDeliverable(
	supabase: SupabaseClient,
	deliverableId: string
): Promise<void> {
	const { error } = await db(supabase)
		.from('sponsor_deliverables')
		.delete()
		.eq('id', deliverableId);

	if (error) {
		log.error('deleteDeliverable failed', { error, data: { deliverableId } });
		throw error;
	}
}