package common

import (
	"encoding/json"
	"log"

	"git.tuxpa.in/a/gosora/common/phrases"
	qgen "git.tuxpa.in/a/gosora/query_gen"
)

// TODO: Refactor the perms system
var BlankPerms Perms
var GuestPerms Perms

// AllPerms is a set of global permissions with everything set to true
var AllPerms Perms
var AllPluginPerms = make(map[string]bool)

// ? - Can we avoid duplicating the items in this list in a bunch of places?
var GlobalPermList = []string{
    "BanUsers",
    "ActivateUsers",
    "EditUser",
    "EditUserEmail",
    "EditUserPassword",
    "EditUserGroup",
    "EditUserGroupSuperMod",
    "EditUserGroupAdmin",
    "EditGroup",
    "EditGroupLocalPerms",
    "EditGroupGlobalPerms",
    "EditGroupSuperMod",
    "EditGroupAdmin",
    "ManageForums",
    "EditSettings",
    "ManageThemes",
    "ManagePlugins",
    "ViewAdminLogs",
    "ViewIPs",
    "UploadFiles",
    "UploadAvatars",
    "UseConvos",
    "UseConvosOnlyWithMod",
    "CreateProfileReply",
    "AutoEmbed",
    "AutoLink",
}

// Permission Structure: ActionComponent[Subcomponent]Flag
type Perms struct {
    // Global Permissions
    BanUsers              bool `json:",omitempty"`
    ActivateUsers         bool `json:",omitempty"`
    EditUser              bool `json:",omitempty"`
    EditUserEmail         bool `json:",omitempty"`
    EditUserPassword      bool `json:",omitempty"`
    EditUserGroup         bool `json:",omitempty"`
    EditUserGroupSuperMod bool `json:",omitempty"`
    EditUserGroupAdmin    bool `json:",omitempty"`
    EditGroup             bool `json:",omitempty"`
    EditGroupLocalPerms   bool `json:",omitempty"`
    EditGroupGlobalPerms  bool `json:",omitempty"`
    EditGroupSuperMod     bool `json:",omitempty"`
    EditGroupAdmin        bool `json:",omitempty"`
    ManageForums          bool `json:",omitempty"` // This could be local, albeit limited for per-forum managers?
    EditSettings          bool `json:",omitempty"`
    ManageThemes          bool `json:",omitempty"`
    ManagePlugins         bool `json:",omitempty"`
    ViewAdminLogs         bool `json:",omitempty"`
    ViewIPs               bool `json:",omitempty"`

    // Global non-staff permissions
    UploadFiles          bool `json:",omitempty"`
    UploadAvatars        bool `json:",omitempty"`
    UseConvos            bool `json:",omitempty"`
    UseConvosOnlyWithMod bool `json:",omitempty"`
    CreateProfileReply   bool `json:",omitempty"`
    AutoEmbed            bool `json:",omitempty"`
    AutoLink             bool `json:",omitempty"`

    // Forum permissions
    ViewTopic bool `json:",omitempty"`
    //ViewOwnTopic bool `json:",omitempty"`
    LikeItem    bool `json:",omitempty"`
    CreateTopic bool `json:",omitempty"`
    EditTopic   bool `json:",omitempty"`
    DeleteTopic bool `json:",omitempty"`
    CreateReply bool `json:",omitempty"`
    //CreateReplyToOwn bool `json:",omitempty"`
    EditReply bool `json:",omitempty"`
    //EditOwnReply bool `json:",omitempty"`
    DeleteReply bool `json:",omitempty"`
    //DeleteOwnReply bool `json:",omitempty"`
    PinTopic   bool `json:",omitempty"`
    CloseTopic bool `json:",omitempty"`
    //CloseOwnTopic bool `json:",omitempty"`
    MoveTopic bool `json:",omitempty"`

    //ExtData map[string]bool `json:",omitempty"`
}

func init() {
    BlankPerms = Perms{
        //ExtData: make(map[string]bool),
    }

    GuestPerms = Perms{
        ViewTopic: true,
        //ExtData: make(map[string]bool),
    }

    AllPerms = Perms{
        BanUsers:              true,
        ActivateUsers:         true,
        EditUser:              true,
        EditUserEmail:         true,
        EditUserPassword:      true,
        EditUserGroup:         true,
        EditUserGroupSuperMod: true,
        EditUserGroupAdmin:    true,
        EditGroup:             true,
        EditGroupLocalPerms:   true,
        EditGroupGlobalPerms:  true,
        EditGroupSuperMod:     true,
        EditGroupAdmin:        true,
        ManageForums:          true,
        EditSettings:          true,
        ManageThemes:          true,
        ManagePlugins:         true,
        ViewAdminLogs:         true,
        ViewIPs:               true,

        UploadFiles:          true,
        UploadAvatars:        true,
        UseConvos:            true,
        UseConvosOnlyWithMod: true,
        CreateProfileReply:   true,
        AutoEmbed:            true,
        AutoLink:             true,

        ViewTopic:   true,
        LikeItem:    true,
        CreateTopic: true,
        EditTopic:   true,
        DeleteTopic: true,
        CreateReply: true,
        EditReply:   true,
        DeleteReply: true,
        PinTopic:    true,
        CloseTopic:  true,
        MoveTopic:   true,

        //ExtData: make(map[string]bool),
    }

    GuestUser.Perms = GuestPerms
    DebugLogf("Guest Perms: %+v\n", GuestPerms)
    DebugLogf("All Perms: %+v\n", AllPerms)
}

func StripInvalidGroupForumPreset(preset string) string {
    switch preset {
    case "read_only", "can_post", "can_moderate", "no_access", "default", "custom":
        return preset
    }
    return ""
}

func StripInvalidPreset(preset string) string {
    switch preset {
    case "all", "announce", "members", "staff", "admins", "archive", "custom":
        return preset
    }
    return ""
}

// TODO: Move this into the phrase system?
func PresetToLang(preset string) string {
    phrases := phrases.GetAllPermPresets()
    phrase, ok := phrases[preset]
    if !ok {
        phrase = phrases["unknown"]
    }
    return phrase
}

// TODO: Is this racey?
// TODO: Test this along with the rest of the perms system
func RebuildGroupPermissions(g *Group) error {
    var permstr []byte
    log.Print("Reloading a group")

    // TODO: Avoid re-initting this all the time
    getGroupPerms, e := qgen.Builder.SimpleSelect("users_groups", "permissions", "gid=?", "", "")
    if e != nil {
        return e
    }
    defer getGroupPerms.Close()

    e = getGroupPerms.QueryRow(g.ID).Scan(&permstr)
    if e != nil {
        return e
    }

    tmpPerms := Perms{
        //ExtData: make(map[string]bool),
    }
    e = json.Unmarshal(permstr, &tmpPerms)
    if e != nil {
        return e
    }
    g.Perms = tmpPerms
    return nil
}

func OverridePerms(p *Perms, status bool) {
    if status {
        *p = AllPerms
    } else {
        *p = BlankPerms
    }
}

// TODO: We need a better way of overriding forum perms rather than setting them one by one
func OverrideForumPerms(p *Perms, status bool) {
    p.ViewTopic = status
    p.LikeItem = status
    p.CreateTopic = status
    p.EditTopic = status
    p.DeleteTopic = status
    p.CreateReply = status
    p.EditReply = status
    p.DeleteReply = status
    p.PinTopic = status
    p.CloseTopic = status
    p.MoveTopic = status
}

func RegisterPluginPerm(name string) {
    AllPluginPerms[name] = true
}

func DeregisterPluginPerm(name string) {
    delete(AllPluginPerms, name)
}