package barertc

import (
	"fmt"
	"net/http"

	"code.nonshy.com/nonshy/website/pkg/config"
	"code.nonshy.com/nonshy/website/pkg/controller/api"
	"code.nonshy.com/nonshy/website/pkg/log"
	"code.nonshy.com/nonshy/website/pkg/mail"
	"code.nonshy.com/nonshy/website/pkg/models"
)

// WebhookRequest is a JSON request wrapper around all webhook messages.
type WebhookRequest struct {
	Action string
	APIKey string

	// Relevant body per request.
	Report WebhookRequestReport `json:",omitempty"`
}

// WebhookRequestReport is the body for 'report' webhook messages.
type WebhookRequestReport struct {
	FromUsername  string
	AboutUsername string
	Channel       string
	Timestamp     string
	Reason        string
	Message       string
	Comment       string
}

// Report webhook controller.
func Report() http.HandlerFunc {

	// Response JSON schema.
	type Response struct {
		OK    bool   `json:"OK"`
		Error string `json:"error,omitempty"`
	}

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			api.SendJSON(w, http.StatusNotAcceptable, Response{
				Error: "POST method only",
			})
			return
		}

		// Parse request payload.
		var req WebhookRequest
		if err := api.ParseJSON(r, &req); err != nil {
			api.SendJSON(w, http.StatusBadRequest, Response{
				Error: fmt.Sprintf("Error with request payload: %s", err),
			})
			return
		}

		// Validate the AdminAPIKey.
		if req.APIKey != config.Current.CronAPIKey {
			api.SendJSON(w, http.StatusForbidden, Response{
				Error: "Invalid API Key",
			})
			return
		}

		// Get the report out.
		report := req.Report
		if report.Comment == "" {
			report.Comment = "(no comment)"
		}

		log.Debug("Got chat report: %+v", report)

		// Create an admin Feedback model.
		fb := &models.Feedback{
			Intent:  "report",
			Subject: "report.chat",
			Message: fmt.Sprintf(
				"A message was reported on the chat room!\n\n"+
					"* From username: [%s](/u/%s)\n"+
					"* About username: [%s](/u/%s)\n"+
					"* Channel: **%s**\n"+
					"* Timestamp: %s\n"+
					"* Classification: %s\n"+
					"* User comment: %s\n\n"+
					"- - - - -\n\n"+
					"The reported message on chat was:\n\n%s",
				report.FromUsername, report.FromUsername,
				report.AboutUsername, report.AboutUsername,
				report.Channel,
				report.Timestamp,
				report.Reason,
				report.Comment,
				report.Message,
			),
		}

		// Get the Reply-To user if possible.
		currentUser, err := models.FindUser(report.FromUsername)
		if err == nil {
			fb.UserID = currentUser.ID
		} else {
			currentUser = nil
		}

		// Save the feedback.
		if err := models.CreateFeedback(fb); err != nil {
			log.Error("Couldn't save feedback from BareRTC report endpoint: %s", err)
		}

		// Email the admins.
		if err := mail.Send(mail.Message{
			To:       config.Current.AdminEmail,
			Subject:  "User Feedback: Chat Room Report",
			Template: "email/contact_admin.html",
			Data: map[string]interface{}{
				"Title":       "Chat Room Report",
				"Intent":      fb.Intent,
				"Subject":     fb.Subject,
				"Message":     fb.Message,
				"CurrentUser": currentUser,
				"BaseURL":     config.Current.BaseURL,
				"AdminURL":    config.Current.BaseURL + "/admin/feedback",
			},
		}); err != nil {
			log.Error("/v1/barertc/report page: couldn't send email: %s", err)
		}

		// Send success response.
		api.SendJSON(w, http.StatusOK, Response{
			OK: true,
		})
	})
}