package api

import (
	"context"
	"errors"
	"fmt"

	"github.com/mitchellh/mapstructure"
)

func (c *Sys) ListAuth() (map[string]*AuthMount, error) {
	r := c.c.NewRequest("GET", "/v1/sys/auth")

	ctx, cancelFunc := context.WithCancel(context.Background())
	defer cancelFunc()
	resp, err := c.c.RawRequestWithContext(ctx, r)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	secret, err := ParseSecret(resp.Body)
	if err != nil {
		return nil, err
	}
	if secret == nil || secret.Data == nil {
		return nil, errors.New("data from server response is empty")
	}

	mounts := map[string]*AuthMount{}
	err = mapstructure.Decode(secret.Data, &mounts)
	if err != nil {
		return nil, err
	}

	return mounts, nil
}

// DEPRECATED: Use EnableAuthWithOptions instead
func (c *Sys) EnableAuth(path, authType, desc string) error {
	return c.EnableAuthWithOptions(path, &EnableAuthOptions{
		Type:        authType,
		Description: desc,
	})
}

func (c *Sys) EnableAuthWithOptions(path string, options *EnableAuthOptions) error {
	r := c.c.NewRequest("POST", fmt.Sprintf("/v1/sys/auth/%s", path))
	if err := r.SetJSONBody(options); err != nil {
		return err
	}

	ctx, cancelFunc := context.WithCancel(context.Background())
	defer cancelFunc()
	resp, err := c.c.RawRequestWithContext(ctx, r)
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	return nil
}

func (c *Sys) DisableAuth(path string) error {
	r := c.c.NewRequest("DELETE", fmt.Sprintf("/v1/sys/auth/%s", path))

	ctx, cancelFunc := context.WithCancel(context.Background())
	defer cancelFunc()
	resp, err := c.c.RawRequestWithContext(ctx, r)
	if err == nil {
		defer resp.Body.Close()
	}
	return err
}

// Structures for the requests/resposne are all down here. They aren't
// individually documented because the map almost directly to the raw HTTP API
// documentation. Please refer to that documentation for more details.

type EnableAuthOptions struct {
	Type        string            `json:"type"`
	Description string            `json:"description"`
	Config      AuthConfigInput   `json:"config"`
	Local       bool              `json:"local"`
	PluginName  string            `json:"plugin_name,omitempty"`
	SealWrap    bool              `json:"seal_wrap" mapstructure:"seal_wrap"`
	Options     map[string]string `json:"options" mapstructure:"options"`
}

type AuthConfigInput struct {
	DefaultLeaseTTL           string   `json:"default_lease_ttl" mapstructure:"default_lease_ttl"`
	MaxLeaseTTL               string   `json:"max_lease_ttl" mapstructure:"max_lease_ttl"`
	PluginName                string   `json:"plugin_name,omitempty" mapstructure:"plugin_name"`
	AuditNonHMACRequestKeys   []string `json:"audit_non_hmac_request_keys,omitempty" mapstructure:"audit_non_hmac_request_keys"`
	AuditNonHMACResponseKeys  []string `json:"audit_non_hmac_response_keys,omitempty" mapstructure:"audit_non_hmac_response_keys"`
	ListingVisibility         string   `json:"listing_visibility,omitempty" mapstructure:"listing_visibility"`
	PassthroughRequestHeaders []string `json:"passthrough_request_headers,omitempty" mapstructure:"passthrough_request_headers"`
}

type AuthMount struct {
	Type        string            `json:"type" mapstructure:"type"`
	Description string            `json:"description" mapstructure:"description"`
	Accessor    string            `json:"accessor" mapstructure:"accessor"`
	Config      AuthConfigOutput  `json:"config" mapstructure:"config"`
	Local       bool              `json:"local" mapstructure:"local"`
	SealWrap    bool              `json:"seal_wrap" mapstructure:"seal_wrap"`
	Options     map[string]string `json:"options" mapstructure:"options"`
}

type AuthConfigOutput struct {
	DefaultLeaseTTL           int      `json:"default_lease_ttl" mapstructure:"default_lease_ttl"`
	MaxLeaseTTL               int      `json:"max_lease_ttl" mapstructure:"max_lease_ttl"`
	PluginName                string   `json:"plugin_name,omitempty" mapstructure:"plugin_name"`
	AuditNonHMACRequestKeys   []string `json:"audit_non_hmac_request_keys,omitempty" mapstructure:"audit_non_hmac_request_keys"`
	AuditNonHMACResponseKeys  []string `json:"audit_non_hmac_response_keys,omitempty" mapstructure:"audit_non_hmac_response_keys"`
	ListingVisibility         string   `json:"listing_visibility,omitempty" mapstructure:"listing_visibility"`
	PassthroughRequestHeaders []string `json:"passthrough_request_headers,omitempty" mapstructure:"passthrough_request_headers"`
}