package main

import (
	"context"
	"fmt"
	"net/http"
	"sort"
	"time"

	"code.hackerspace.pl/hscloud/go/mirko"
	"code.hackerspace.pl/hscloud/go/statusz"
	pb "code.hackerspace.pl/hscloud/proto/invoice"
	"github.com/golang/glog"
)

const invoicesFragment = `
    <style type="text/css">
		.table td,th {
			background-color: #eee;
			padding: 0.2em 0.4em 0.2em 0.4em;
		}
		.table th {
			background-color: #c0c0c0;
		}
		.table {
			background-color: #fff;
			border-spacing: 0.2em;
			margin-left: auto;
			margin-right: auto;
		}
	</style>
    <div>
		{{ .Msg }}
        <table class="table">
            <tr>
                <th>Number</th>
				<th>Created/Issued</th>
				<th>Customer</th>
				<th>Amount (net)</th>
				<th>Actions</th>
            </tr>
            {{ range .Invoices }}
				{{ if eq .State 2 }}
				<tr>
				{{ else }}
				<tr style="opacity: 0.5">
				{{ end }}
				    <td>{{ .FinalUid }}</td>
					<td>{{ .DatePretty.Format "2006/01/02 15:04:05" }}</td>
					<td>{{ index .Data.CustomerBilling 0 }}</td>
					<td>{{ .TotalNetPretty }}</td>
				    <td>
						<a href="/debug/view?id={{ .Uid }}">View</a>
					</td>
				</tr>
			{{ end }}
        </table>
    </div>
`

type templateInvoice struct {
	*pb.Invoice
	TotalNetPretty string
	DatePretty     time.Time
}

func (s *service) setupStatusz(m *mirko.Mirko) {
	statusz.AddStatusPart("Invoices", invoicesFragment, func(ctx context.Context) interface{} {
		var res struct {
			Invoices []templateInvoice
			Msg      string
		}
		invoices, err := s.m.getInvoices(ctx)
		res.Invoices = make([]templateInvoice, len(invoices))
		for i, inv := range invoices {
			res.Invoices[i] = templateInvoice{
				Invoice:        inv,
				TotalNetPretty: fmt.Sprintf("%.2f %s", float64(inv.TotalNet)/100, inv.Unit),
				DatePretty:     time.Unix(0, inv.Date),
			}
		}

		if err != nil {
			glog.Errorf("Could not get invoices for statusz: %v", err)
			res.Msg = fmt.Sprintf("Could not get invoices: %v", err)
		}

		sort.Slice(res.Invoices, func(i, j int) bool { return res.Invoices[i].Date > res.Invoices[j].Date })
		return res
	})

	m.HTTPMux().HandleFunc("/debug/view", func(w http.ResponseWriter, r *http.Request) {
		rendered, err := s.invoicePDF(r.Context(), r.URL.Query().Get("id"))
		if err != nil {
			fmt.Fprintf(w, "error: %v", err)
		}
		w.Header().Set("Content-type", "application/pdf")
		w.Write(rendered)
	})
}