package handlers

import (
	"encoding/json"
	"net/http"
	"time"
)

// MockLedgerHandler provides mock data when real ledger is unavailable
type MockLedgerHandler struct{}

func NewMockLedgerHandler() *MockLedgerHandler {
	return &MockLedgerHandler{}
}

func (h *MockLedgerHandler) GetBalanceSheet(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"assets": []map[string]interface{}{
			{"account": "1930 - Checkkonto", "amount": 245000},
			{"account": "1940 - Sparkonto", "amount": 500000},
			{"account": "1510 - Kundfordringar", "amount": 125000},
		},
		"liabilities": []map[string]interface{}{
			{"account": "2440 - Leverantörsskulder", "amount": 85000},
			{"account": "2013 - Aktiekapital", "amount": 100000},
		},
		"equity": []map[string]interface{}{
			{"account": "2091 - Balanserad vinst", "amount": 485000},
		},
		"total_assets": 870000,
		"total_liabilities": 185000,
		"total_equity": 685000,
		"period": time.Now().Format("2006-01"),
	})
}

func (h *MockLedgerHandler) GetIncomeStatement(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"revenue": []map[string]interface{}{
			{"account": "3001 - Försäljning tjänster", "amount": 450000},
			{"account": "3002 - Försäljning produkter", "amount": 125000},
		},
		"expenses": []map[string]interface{}{
			{"account": "6100 - Löner", "amount": 180000},
			{"account": "6200 - Hyra", "amount": 45000},
			{"account": "6300 - Marknadsföring", "amount": 35000},
			{"account": "6400 - IT-kostnader", "amount": 25000},
		},
		"total_revenue": 575000,
		"total_expenses": 285000,
		"net_income": 290000,
		"period": time.Now().Format("2006-01"),
	})
}

func (h *MockLedgerHandler) GetMomsReport(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"moms_in": 143750,
		"moms_ut": 71250,
		"moms_att_betala": 72500,
		"period": time.Now().Format("2006-01"),
	})
}

func (h *MockLedgerHandler) GetAccounts(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"accounts": []map[string]interface{}{
			{"id": "1930", "name": "Checkkonto", "type": "asset", "balance": 245000},
			{"id": "1940", "name": "Sparkonto", "type": "asset", "balance": 500000},
			{"id": "1510", "name": "Kundfordringar", "type": "asset", "balance": 125000},
			{"id": "2440", "name": "Leverantörsskulder", "type": "liability", "balance": 85000},
			{"id": "2013", "name": "Aktiekapital", "type": "equity", "balance": 100000},
			{"id": "2091", "name": "Balanserad vinst", "type": "equity", "balance": 485000},
			{"id": "3001", "name": "Försäljning tjänster", "type": "revenue", "balance": 450000},
			{"id": "6100", "name": "Löner", "type": "expense", "balance": 180000},
		},
	})
}

func (h *MockLedgerHandler) GetInvoices(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"invoices": []map[string]interface{}{
			{"id": "INV-001", "customer": "Test AB", "amount": 25000, "status": "paid", "due_date": "2026-07-30"},
			{"id": "INV-002", "customer": "Acme Corp", "amount": 45000, "status": "pending", "due_date": "2026-08-15"},
			{"id": "INV-003", "customer": "Stark Industries", "amount": 125000, "status": "overdue", "due_date": "2026-06-30"},
		},
		"total": 3,
	})
}

func (h *MockLedgerHandler) GetCashflow(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"inflow": 320000,
		"outflow": 180000,
		"net": 140000,
		"period": time.Now().Format("2006-01"),
	})
}

func (h *MockLedgerHandler) GetBudget(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"budget": 500000,
		"actual": 245000,
		"remaining": 255000,
		"period": time.Now().Format("2006-01"),
	})
}

func (h *MockLedgerHandler) CreateExpense(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"id": "EXP-001",
		"status": "created",
	})
}

func (h *MockLedgerHandler) ListExpenses(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"expenses": []map[string]interface{}{
			{"id": "EXP-001", "category": "Boende", "amount": 8500, "date": "2026-07-01"},
			{"id": "EXP-002", "category": "Mat", "amount": 3200, "date": "2026-07-05"},
			{"id": "EXP-003", "category": "Resa", "amount": 4500, "date": "2026-07-10"},
		},
		"total": 3,
	})
}