package web

import (
	"fmt"
	"net/url"
	"strings"
)

// webRoutes is the single source of truth for browser-facing dynamic paths.
// Parameter values are passed to webPath in the order in which they occur here.
var webRoutes = map[string]string{
	"home":                          "/",
	"healthcheck":                   "/healtcheck",
	"privacy":                       "/datenschutz",
	"login":                         "/login",
	"activate":                      "/activate",
	"logout":                        "/logout",
	"account":                       "/account",
	"account.profile":               "/account/profile",
	"account.password":              "/account/password",
	"account.email":                 "/account/email",
	"account.email-confirm":         "/account/email-confirm",
	"account.session.delete":        "/account/sessions/:sessionID/delete",
	"settings":                      "/settings",
	"admin":                         "/admin",
	"admin.user.invite":             "/admin/user-invite",
	"admin.user.role":               "/admin/users/:userID/role",
	"admin.user.delete":             "/admin/users/:userID/delete",
	"admin.role.new":                "/admin/roles/new",
	"admin.role.update":             "/admin/roles/update",
	"admin.role.delete":             "/admin/roles/delete",
	"admin.application-settings":    "/admin/application-settings",
	"admin.test-mail":               "/admin/test-mail",
	"admin.species-category.new":    "/admin/species-category-new",
	"admin.species-category.edit":   "/admin/species-category-edit/:categoryID",
	"admin.species-category.delete": "/admin/species-category-delete/:categoryID",
	"admin.task-priority.new":       "/admin/task-priority-new",
	"admin.task-priority.edit":      "/admin/task-priority-edit/:priorityID",
	"admin.task-priority.delete":    "/admin/task-priority-delete/:priorityID",
	"gardens":                       "/gardens",
	"garden.new":                    "/gardens/new",
	"garden.edit":                   "/gardens/edit/:gardenID",
	"garden.delete":                 "/gardens/delete/:gardenID",
	"garden.dashboard":              "/g/:gardenID",
	"garden.search":                 "/g/:gardenID/search",
	"garden.journal":                "/g/:gardenID/journal",
	"garden.pinboard":               "/g/:gardenID/pinboard",
	"garden.images":                 "/g/:gardenID/images",
	"garden.image.data":             "/g/:gardenID/images/:imageID/data",
	"journal.new":                   "/g/:gardenID/journal/new",
	"journal.edit":                  "/g/:gardenID/journal/edit/:entryID",
	"journal.delete":                "/g/:gardenID/journal/delete/:entryID",
	"journal.attachment":            "/g/:gardenID/journal/attachments/:entryID/:attachmentID",
	"pinboard.new":                  "/g/:gardenID/pinboard/new",
	"pinboard.edit":                 "/g/:gardenID/pinboard/edit/:entryID",
	"pinboard.delete":               "/g/:gardenID/pinboard/delete/:entryID",
	"pinboard.attachment":           "/g/:gardenID/pinboard/attachments/:entryID/:attachmentID",
	"garden.members":                "/g/:gardenID/members",
	"garden.invite.new":             "/g/:gardenID/member-invite-new",
	"garden.member.role":            "/g/:gardenID/members/:userID/role",
	"garden.member.delete":          "/g/:gardenID/members/:userID/delete",
	"garden.member.transfer":        "/g/:gardenID/members/:userID/transfer",
	"garden.invite.delete":          "/g/:gardenID/member-invite-delete/:inviteID",
	"garden.role.update":            "/g/:gardenID/roles/update",
	"garden.role.new":               "/g/:gardenID/roles/new",
	"garden.role.delete":            "/g/:gardenID/roles/delete",
	"invite":                        "/invite",
	"plants":                        "/g/:gardenID/plants",
	"plant.new":                     "/g/:gardenID/plants/new",
	"plant.edit":                    "/g/:gardenID/plants/edit/:plantID",
	"plant.delete":                  "/g/:gardenID/plants/delete/:plantID",
	"plant.status":                  "/g/:gardenID/plants/status/:plantID",
	"plant.template-opt-out":        "/g/:gardenID/plant-template-opt-out/:plantID/:templateID",
	"plant.task-row":                "/g/:gardenID/plant-task-row",
	"plant.template-tasks":          "/g/:gardenID/plant-template-tasks",
	"plant.template-task":           "/g/:gardenID/plant-template-task/:templateID",
	"plant.location.new":            "/g/:gardenID/plant-location-new/:plantID",
	"plant.location.edit":           "/g/:gardenID/plant-location-edit/:plantID/:assignmentID",
	"plant.location.delete":         "/g/:gardenID/plant-location-delete/:plantID/:assignmentID",
	"locations":                     "/g/:gardenID/locations",
	"location.new":                  "/g/:gardenID/locations/new",
	"location.view":                 "/g/:gardenID/locations/view/:locationID",
	"location.edit":                 "/g/:gardenID/locations/edit/:locationID",
	"location.delete":               "/g/:gardenID/locations/delete/:locationID",
	"species":                       "/g/:gardenID/species",
	"species.new":                   "/g/:gardenID/species/new",
	"species.edit":                  "/g/:gardenID/species/edit/:speciesID",
	"species.delete":                "/g/:gardenID/species/delete/:speciesID",
	"species.care.new":              "/g/:gardenID/species-care/:speciesID/new",
	"species.care.edit":             "/g/:gardenID/species-care/:speciesID/edit/:instructionID",
	"species.care.delete":           "/g/:gardenID/species-care/:speciesID/delete/:instructionID",
	"tasks":                         "/g/:gardenID/tasks",
	"tasks.calendar":                "/g/:gardenID/tasks/calendar",
	"task.new":                      "/g/:gardenID/tasks/new",
	"task.edit":                     "/g/:gardenID/tasks/edit/:taskID",
	"task.complete":                 "/g/:gardenID/tasks/complete/:taskID",
	"task.reopen":                   "/g/:gardenID/tasks/reopen/:taskID",
	"task.delete":                   "/g/:gardenID/tasks/delete/:taskID",
	"task-template.new":             "/g/:gardenID/task-templates/new",
	"task-template.edit":            "/g/:gardenID/task-templates/edit/:templateID",
	"task-template.delete":          "/g/:gardenID/task-templates/delete/:templateID",
}

func routePath(name string) string {
	pattern, ok := webRoutes[name]
	if !ok {
		panic("unknown web route: " + name)
	}
	return pattern
}

func webPath(name string, params ...any) string {
	parts := strings.Split(routePath(name), "/")
	paramIndex := 0
	for i, part := range parts {
		if !strings.HasPrefix(part, ":") {
			continue
		}
		if paramIndex >= len(params) {
			panic(fmt.Sprintf("route %q needs more parameters", name))
		}
		parts[i] = url.PathEscape(fmt.Sprint(params[paramIndex]))
		paramIndex++
	}
	if paramIndex != len(params) {
		panic(fmt.Sprintf("route %q received too many parameters", name))
	}
	return strings.Join(parts, "/")
}

func pathWithQuery(path string, pairs ...any) string {
	if len(pairs)%2 != 0 {
		panic("pathWithQuery requires key/value pairs")
	}
	values := url.Values{}
	for i := 0; i < len(pairs); i += 2 {
		values.Set(fmt.Sprint(pairs[i]), fmt.Sprint(pairs[i+1]))
	}
	if len(values) == 0 {
		return path
	}
	return path + "?" + values.Encode()
}

func safeReturnPath(value string) string {
	value = strings.TrimSpace(value)
	if value == "" {
		return ""
	}
	target, err := url.Parse(value)
	if err != nil || target.IsAbs() || target.Host != "" || !strings.HasPrefix(target.Path, "/") || strings.HasPrefix(target.Path, "//") || strings.Contains(target.Path, `\`) {
		return ""
	}
	return target.RequestURI()
}