package handlers

import (
	"net/http"
	"time"
)

// FortnoxHandler hanterar Fortnox-integration
type FortnoxHandler struct{}

func NewFortnoxHandler() *FortnoxHandler {
	return &FortnoxHandler{}
}

// FortnoxVoucher representerar ett Fortnox-verifikat
type FortnoxVoucher struct {
	ID          string    `json:"id"`
	Date        string    `json:"date"`
	Text        string    `json:"text"`
	Rows        []FortnoxRow `json:"rows"`
	Synced      bool      `json:"synced"`
	SyncedAt    *time.Time `json:"synced_at,omitempty"`
}

// FortnoxRow representerar en Fortnox-rad
type FortnoxRow struct {
	Account     string  `json:"account"`
	AccountName string  `json:"account_name"`
	Debit       float64 `json:"debit"`
	Credit      float64 `json:"credit"`
	Description string  `json:"description"`
}

// GetStatus returnerar Fortnox-kopplingsstatus
func (h *FortnoxHandler) GetStatus(w http.ResponseWriter, r *http.Request) {
	status := map[string]interface{}{
		"configured":     false,
		"client_id":      "",
		"auth_url":       "https://apps.fortnox.se/oauth-v1/auth",
		"token_url":      "https://apps.fortnox.se/oauth-v1/token",
		"api_base":       "https://api.fortnox.se/3",
		"setup_required": true,
	}

	writeJSON(w, http.StatusOK, map[string]interface{}{
		"ok":      true,
		"fortnox": status,
	})
}

// GetVouchers returnerar Fortnox-verifikat
func (h *FortnoxHandler) GetVouchers(w http.ResponseWriter, r *http.Request) {
	vouchers := []FortnoxVoucher{
		{
			ID:   "fnx-001",
			Date: "2026-08-01",
			Text: "Faktura #1001",
			Rows: []FortnoxRow{
				{Account: "1510", AccountName: "Kundfordringar", Debit: 25000, Credit: 0, Description: "Faktura #1001"},
				{Account: "3010", AccountName: "Försäljning", Debit: 0, Credit: 25000, Description: "Faktura #1001"},
			},
			Synced: true,
			SyncedAt: timePtr(time.Now().Add(-48 * time.Hour)),
		},
		{
			ID:   "fnx-002",
			Date: "2026-08-02",
			Text: "Leverantörsfaktura AWS",
			Rows: []FortnoxRow{
				{Account: "6540", AccountName: "IT-kostnader", Debit: 8500, Credit: 0, Description: "AWS hosting"},
				{Account: "2440", AccountName: "Leverantörsskulder", Debit: 0, Credit: 8500, Description: "AWS hosting"},
			},
			Synced: true,
			SyncedAt: timePtr(time.Now().Add(-24 * time.Hour)),
		},
	}

	writeJSON(w, http.StatusOK, map[string]interface{}{
		"ok":       true,
		"vouchers": vouchers,
	})
}