package server

import (
	"fmt"
	"net/http"
	"strconv"
	"time"

	"github.com/a-h/templ"
	"github.com/labstack/echo/v4"
	"github.com/labstack/gommon/log"
	u "github.com/rjNemo/underscore"

	"github.com/rjNemo/rentease/constants"
	"github.com/rjNemo/rentease/internal/domains/booking"
	"github.com/rjNemo/rentease/internal/pdf"
	"github.com/rjNemo/rentease/internal/views"
	myTime "github.com/rjNemo/rentease/pkg/time"
)

func handleHomePage() echo.HandlerFunc {
	return func(ctx echo.Context) error {
		component := views.Index()
		return renderTempl(ctx, http.StatusOK, component)
	}
}

func (s Server) handleListBookingPage() echo.HandlerFunc {
	return func(c echo.Context) error {
		bookings := make([]*booking.Booking, 0)
		_ = s.db.Order("id desc").Find(&bookings)

		bvm := u.Map(bookings, func(b *booking.Booking) *views.ListBookingsViewModel {
			return &views.ListBookingsViewModel{
				Id:       strconv.Itoa(b.Id),
				Url:      templ.SafeURL(fmt.Sprintf("%s/%d", constants.RouteBooking, b.Id)),
				From:     b.From.Format("2006-01-02"),
				To:       b.To.Format("2006-01-02"),
				Platform: b.Platform,
				Name:     b.Name,
			}
		})

		component := views.ListBookings(bvm)
		return s.renderTempl(c, http.StatusOK, component)
	}
}

func (s Server) handleNewBookingPage() echo.HandlerFunc {
	return func(c echo.Context) error {
		component := views.NewBooking(constants.Platforms)
		return s.renderTempl(c, http.StatusOK, component)
	}
}

func (s Server) handleCreateBooking() echo.HandlerFunc {
	return func(c echo.Context) error {
		type NewBooking struct {
			From           time.Time `json:"from"`
			To             time.Time `from:"to"`
			Name           string    `form:"name"`
			PhoneNumber    string    `form:"phone_number"`
			Email          string    `form:"email"`
			Platform       string    `form:"platform"`
			CustomerNumber int       `form:"customer_number"`
			PlatformFees   float64   `form:"platform_fees"`
		}
		nb := new(NewBooking)
		err := c.Bind(nb)
		if err != nil {
			log.Warn(err)
			return err
		}

		ts, _ := myTime.ParseFromForm(c.FormValue("from"))
		nb.From = ts
		ts, _ = myTime.ParseFromForm(c.FormValue("to"))
		nb.To = ts

		b := &booking.Booking{
			Name:           nb.Name,
			PhoneNumber:    nb.PhoneNumber,
			CustomerNumber: nb.CustomerNumber,
			Email:          nb.Email,
			From:           nb.From,
			To:             nb.To,
			Platform:       nb.Platform,
			PlatformFees:   nb.PlatformFees,
		}
		_ = s.db.Create(b)
		return c.Redirect(http.StatusSeeOther, fmt.Sprintf("%s/%d", constants.RouteBooking, b.Id))
	}
}

func (s Server) handleBookingPage() echo.HandlerFunc {
	return func(c echo.Context) error {
		idStr := c.Param("id")
		id, err := strconv.Atoi(idStr)
		if err != nil {
			return err
		}
		b := &booking.Booking{Id: id}
		s.db.Preload("Items").First(b)

		bvm := &views.BookingViewModel{
			Id:             fmt.Sprintf("%04s", strconv.Itoa(b.Id)),
			Name:           b.Name,
			PhoneNumber:    b.PhoneNumber,
			CustomerNumber: strconv.Itoa(b.CustomerNumber),
			Email:          b.Email,
			From:           b.From.Format("2006-01-02"),
			To:             b.To.Format("2006-01-02"),
			Platform:       b.Platform,
			PlatformFees:   strconv.FormatFloat(b.PlatformFees, 'f', 2, 64),
			Url:            templ.EscapeString(fmt.Sprintf("%s/%d/items", constants.RouteBooking, b.Id)),
			Items: u.Map(b.Items, func(i booking.Item) views.ItemViewModel {
				return views.ItemViewModel{
					Item:          i.Item,
					Quantity:      strconv.Itoa(i.Quantity),
					Price:         strconv.FormatFloat(i.Price, 'f', 2, 64),
					SubTotal:      strconv.FormatFloat(i.Price*float64(i.Quantity), 'f', 2, 64),
					PaymentMethod: i.PaymentMethod,
					PaymentStatus: i.PaymentStatus,
				}
			}),
			Total: strconv.FormatFloat(u.Reduce(b.Items, func(i booking.Item, sum float64) float64 {
				return sum + i.Price*float64(i.Quantity)
			}, 0.0), 'f', 2, 64),
			Platforms:      constants.Platforms,
			ItemList:       constants.Items,
			PaymentMethods: constants.PaymentMethods,
		}
		component := views.BookingById(bvm)
		return s.renderTempl(c, http.StatusOK, component)
	}
}

func (s Server) handleCreateItem() echo.HandlerFunc {
	return func(c echo.Context) error {
		bookingIdStr := c.Param("id")
		bid, err := strconv.Atoi(bookingIdStr)
		if err != nil {
			return err
		}

		type NewItem struct {
			Item          string  `form:"item"`
			PaymentMethod string  `form:"method"`
			Quantity      int     `form:"quantity"`
			Price         float64 `form:"price"`
		}
		ni := new(NewItem)
		if err := c.Bind(ni); err != nil {
			log.Warn(err)
			return err
		}

		i := &booking.Item{
			BookingId:     bid,
			Item:          ni.Item,
			Quantity:      ni.Quantity,
			Price:         ni.Price,
			PaymentMethod: ni.PaymentMethod,
		}
		_ = s.db.Create(i)
		return s.renderTempl(c, http.StatusCreated, views.LineItem(i))
	}
}

func handleCreateInvoicePdf(ps *pdf.PdfService) echo.HandlerFunc {
	return func(c echo.Context) error {
		err := ps.BuildInvoice()
		if err != nil {
			return err
		}
		return c.Attachment("tmp.pdf", "tmp.pdf")
	}
}