package api

import (
	"encoding/json"
	"net/http"

	"github.com/gorilla/mux"
	"github.com/mattermost/focalboard/server/model"
	"github.com/mattermost/focalboard/server/services/audit"
	"github.com/mattermost/focalboard/server/utils"
)

func (a *API) registerTeamsRoutes(r *mux.Router) {
	// Team APIs
	r.HandleFunc("/teams", a.sessionRequired(a.handleGetTeams)).Methods("GET")
	r.HandleFunc("/teams/{teamID}", a.sessionRequired(a.handleGetTeam)).Methods("GET")
	r.HandleFunc("/teams/{teamID}/users", a.sessionRequired(a.handleGetTeamUsers)).Methods("GET")
	r.HandleFunc("/teams/{teamID}/archive/export", a.sessionRequired(a.handleArchiveExportTeam)).Methods("GET")
}

func (a *API) handleGetTeams(w http.ResponseWriter, r *http.Request) {
	// swagger:operation GET /teams getTeams
	//
	// Returns information of all the teams
	//
	// ---
	// produces:
	// - application/json
	// security:
	// - BearerAuth: []
	// responses:
	//   '200':
	//     description: success
	//     schema:
	//       type: array
	//       items:
	//         "$ref": "#/definitions/Team"
	//   default:
	//     description: internal error
	//     schema:
	//       "$ref": "#/definitions/ErrorResponse"

	userID := getUserID(r)

	teams, err := a.app.GetTeamsForUser(userID)
	if err != nil {
		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
	}

	auditRec := a.makeAuditRecord(r, "getTeams", audit.Fail)
	defer a.audit.LogRecord(audit.LevelRead, auditRec)
	auditRec.AddMeta("teamCount", len(teams))

	data, err := json.Marshal(teams)
	if err != nil {
		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
		return
	}

	jsonBytesResponse(w, http.StatusOK, data)
	auditRec.Success()
}

func (a *API) handleGetTeam(w http.ResponseWriter, r *http.Request) {
	// swagger:operation GET /teams/{teamID} getTeam
	//
	// Returns information of the root team
	//
	// ---
	// produces:
	// - application/json
	// parameters:
	// - name: teamID
	//   in: path
	//   description: Team ID
	//   required: true
	//   type: string
	// security:
	// - BearerAuth: []
	// responses:
	//   '200':
	//     description: success
	//     schema:
	//       "$ref": "#/definitions/Team"
	//   default:
	//     description: internal error
	//     schema:
	//       "$ref": "#/definitions/ErrorResponse"

	vars := mux.Vars(r)
	teamID := vars["teamID"]
	userID := getUserID(r)

	if !a.permissions.HasPermissionToTeam(userID, teamID, model.PermissionViewTeam) {
		a.errorResponse(w, r.URL.Path, http.StatusForbidden, "", PermissionError{"access denied to team"})
		return
	}

	var team *model.Team
	var err error

	if a.MattermostAuth {
		team, err = a.app.GetTeam(teamID)
		if err != nil {
			a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
		}
		if team == nil {
			a.errorResponse(w, r.URL.Path, http.StatusUnauthorized, "invalid team", nil)
			return
		}
	} else {
		team, err = a.app.GetRootTeam()
		if err != nil {
			a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
			return
		}
	}

	auditRec := a.makeAuditRecord(r, "getTeam", audit.Fail)
	defer a.audit.LogRecord(audit.LevelRead, auditRec)
	auditRec.AddMeta("resultTeamID", team.ID)

	data, err := json.Marshal(team)
	if err != nil {
		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
		return
	}

	jsonBytesResponse(w, http.StatusOK, data)
	auditRec.Success()
}

func (a *API) handlePostTeamRegenerateSignupToken(w http.ResponseWriter, r *http.Request) {
	// swagger:operation POST /teams/{teamID}/regenerate_signup_token regenerateSignupToken
	//
	// Regenerates the signup token for the root team
	//
	// ---
	// produces:
	// - application/json
	// parameters:
	// - name: teamID
	//   in: path
	//   description: Team ID
	//   required: true
	//   type: string
	// security:
	// - BearerAuth: []
	// responses:
	//   '200':
	//     description: success
	//   default:
	//     description: internal error
	//     schema:
	//       "$ref": "#/definitions/ErrorResponse"
	if a.MattermostAuth {
		a.errorResponse(w, r.URL.Path, http.StatusNotImplemented, "not permitted in plugin mode", nil)
		return
	}

	team, err := a.app.GetRootTeam()
	if err != nil {
		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
		return
	}

	auditRec := a.makeAuditRecord(r, "regenerateSignupToken", audit.Fail)
	defer a.audit.LogRecord(audit.LevelModify, auditRec)

	team.SignupToken = utils.NewID(utils.IDTypeToken)

	err = a.app.UpsertTeamSignupToken(*team)
	if err != nil {
		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
		return
	}

	jsonStringResponse(w, http.StatusOK, "{}")
	auditRec.Success()
}

func (a *API) handleGetTeamUsers(w http.ResponseWriter, r *http.Request) {
	// swagger:operation GET /teams/{teamID}/users getTeamUsers
	//
	// Returns team users
	//
	// ---
	// produces:
	// - application/json
	// parameters:
	// - name: teamID
	//   in: path
	//   description: Team ID
	//   required: true
	//   type: string
	// - name: search
	//   in: query
	//   description: string to filter users list
	//   required: false
	//   type: string
	// security:
	// - BearerAuth: []
	// responses:
	//   '200':
	//     description: success
	//     schema:
	//       type: array
	//       items:
	//         "$ref": "#/definitions/User"
	//   default:
	//     description: internal error
	//     schema:
	//       "$ref": "#/definitions/ErrorResponse"

	vars := mux.Vars(r)
	teamID := vars["teamID"]
	userID := getUserID(r)
	query := r.URL.Query()
	searchQuery := query.Get("search")

	if !a.permissions.HasPermissionToTeam(userID, teamID, model.PermissionViewTeam) {
		a.errorResponse(w, r.URL.Path, http.StatusForbidden, "Access denied to team", PermissionError{"access denied to team"})
		return
	}

	auditRec := a.makeAuditRecord(r, "getUsers", audit.Fail)
	defer a.audit.LogRecord(audit.LevelRead, auditRec)

	users, err := a.app.SearchTeamUsers(teamID, searchQuery)
	if err != nil {
		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "searchQuery="+searchQuery, err)
		return
	}

	data, err := json.Marshal(users)
	if err != nil {
		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
		return
	}

	jsonBytesResponse(w, http.StatusOK, data)

	auditRec.AddMeta("userCount", len(users))
	auditRec.Success()
}