package main

import (
	"context"
	"fmt"
	"io/fs"
	"log"
	"net/http"
	"os"

	"github.com/go-chi/chi/v5"
	"github.com/go-chi/chi/v5/middleware"
	"github.com/joho/godotenv"

	"financeiro-carvalho/internal/db"
	"financeiro-carvalho/internal/handler"
	"financeiro-carvalho/internal/migration"
	"financeiro-carvalho/internal/repository"
	"financeiro-carvalho/internal/service"
	"financeiro-carvalho/static"
)

func main() {
	_ = godotenv.Load()

	dsn := os.Getenv("DATABASE_URL")
	if dsn == "" {
		log.Fatal("DATABASE_URL is required")
	}

	ctx := context.Background()
	pool, err := db.Connect(ctx, dsn)
	if err != nil {
		log.Fatalf("db connect: %v", err)
	}
	defer pool.Close()

	if err := migration.Run(ctx, pool); err != nil {
		log.Fatalf("migration: %v", err)
	}

	port := os.Getenv("PORT")
	if port == "" {
		port = "8080"
	}

	r := chi.NewRouter()
	r.Use(middleware.Logger)
	r.Use(middleware.Recoverer)

	categoryRepo := repository.NewCategoryRepository(pool)
	categorySvc := service.NewCategoryService(categoryRepo)
	categoryHandler := handler.NewCategoryHandler(categorySvc)

	transactionRepo := repository.NewTransactionRepository(pool)
	importSvc := service.NewImportService(transactionRepo)
	importHandler := handler.NewImportHandler(importSvc)

	manualTxRepo := repository.NewManualTransactionRepository(pool)
	txSvc := service.NewTransactionService(manualTxRepo)
	txHandler := handler.NewTransactionHandler(txSvc)

	recurringRepo := repository.NewRecurringRepository(pool)
	recurringSvc := service.NewRecurringService(recurringRepo, manualTxRepo)
	recurringHandler := handler.NewRecurringHandler(recurringSvc)

	r.Get("/health", handler.Health)

	r.Route("/api", func(r chi.Router) {
		r.Get("/categories", categoryHandler.List)
		r.Post("/categories", categoryHandler.Create)
		r.Put("/categories/{id}", categoryHandler.Update)
		r.Delete("/categories/{id}", categoryHandler.Delete)

		r.Post("/imports/preview", importHandler.Preview)
		r.Post("/imports/confirm", importHandler.Confirm)

		r.Get("/transactions", txHandler.List)
		r.Post("/transactions", txHandler.Create)
		r.Put("/transactions/{id}", txHandler.Update)
		r.Delete("/transactions/{id}", txHandler.Delete)

		r.Get("/recurring", recurringHandler.List)
		r.Post("/recurring", recurringHandler.Create)
		r.Put("/recurring/{id}", recurringHandler.Update)
		r.Delete("/recurring/{id}", recurringHandler.Delete)
		r.Get("/recurring/status", recurringHandler.MonthlyStatus)
		r.Post("/recurring/{id}/ignore", recurringHandler.Ignore)
		r.Delete("/recurring/{id}/ignore", recurringHandler.Unignore)
	})

	// Serve Vue SPA — non-API routes fall through to index.html
	distFS, err := fs.Sub(static.FS, "dist")
	if err != nil {
		log.Fatalf("static embed sub: %v", err)
	}
	fileServer := http.FileServer(http.FS(distFS))
	r.Get("/*", func(w http.ResponseWriter, req *http.Request) {
		path := req.URL.Path[1:]
		if _, statErr := fs.Stat(distFS, path); statErr != nil {
			index, readErr := fs.ReadFile(distFS, "index.html")
			if readErr != nil {
				http.NotFound(w, req)
				return
			}
			w.Header().Set("Content-Type", "text/html; charset=utf-8")
			w.Write(index)
			return
		}
		fileServer.ServeHTTP(w, req)
	})

	fmt.Printf("server listening on :%s\n", port)
	if err := http.ListenAndServe(":"+port, r); err != nil {
		log.Fatal(err)
	}
}