package moderation

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/url"

	"github.com/google/go-querystring/query"
)

type UpdateAutoModSettingsParams struct {
	// The ID of the broadcaster whose AutoMod settings you want to update.
	BroadcasterID string `url:"broadcaster_id"`

	// The ID of the broadcaster or a user that has permission to moderate the broadcaster’s chat room.
	// This ID must match the user ID in the user access token.
	ModeratorID string `url:"moderator_id"`
}

// Because PUT is an overwrite operation, you must include all the fields that you want set after the operation completes.
// Typically, you’ll send a GET request, update the fields you want to change, and pass that object in the PUT request.
//
// You may set either overall_level or the individual settings like aggression, but not both.
//
// Setting overall_level applies default values to the individual settings.
// However, setting overall_level to 4 does not necessarily mean that it applies 4 to all the individual settings.
// Instead, it applies a set of recommended defaults to the rest of the settings.
// For example, if you set overall_level to 2, Twitch provides some filtering on discrimination and sexual content,
// but more filtering on hostility (see the first example response).
//
// If overall_level is currently set and you update swearing to 3, overall_level will be set to null and all settings other than swearing will be set to 0.
// The same is true if individual settings are set and you update overall_level to 3 — all the individual settings are updated to reflect the default level.
//
// Note that if you set all the individual settings to values that match what overall_level would have set them to,
// Twitch changes AutoMod to use the default AutoMod level instead of using the individual settings.
//
// Valid values for all levels are from 0 (no filtering) through 4 (most aggressive filtering).
// These levels affect how aggressively AutoMod holds back messages for moderators to review before they appear in chat or are denied (not shown).
type UpdateAutoModSettingsRequest struct {
	// The Automod level for hostility involving aggression.
	Aggression int `json:"aggression"`

	// The Automod level for hostility involving name calling or insults.
	Bullying int `json:"bullying"`

	// The Automod level for discrimination against disability.
	Disability int `json:"disability"`

	// The Automod level for discrimination against women.
	Misogyny int `json:"misogyny"`

	// The default AutoMod level for the broadcaster.
	OverallLevel int `json:"overall_level"`

	// The Automod level for discrimination based on sexuality, sex, or gender.
	RaceEthnicityOrReligion int `json:"race_ethnicity_or_religion"`

	// The Automod level for sexual content.
	SexBasedTerms int `json:"sex_based_terms"`

	// The Automod level for discrimination against sexuality, sex, or gender.
	SexualitySexOrGender int `json:"sexuality_sex_or_gender"`

	// The Automod level for profanity.
	Swearing int `json:"swearing"`
}

type UpdateAutoModSettingsResponse struct {
	// The list of AutoMod settings. The list contains a single object that contains all the AutoMod settings.
	Data []AutoModSettings `json:"data"`
}

// Updates the broadcaster’s AutoMod settings.
// The settings are used to automatically block inappropriate or harassing messages from appearing in the broadcaster’s chat room.
//
// Requires a user access token that includes the moderator:manage:automod_settings scope.
func (m *Moderation) UpdateAutoModSettings(ctx context.Context, params *UpdateAutoModSettingsParams, body *UpdateAutoModSettingsRequest) (*UpdateAutoModSettingsResponse, error) {
	v, _ := query.Values(params)
	endpoint := m.baseUrl.ResolveReference(&url.URL{Path: "moderation/automod/settings", RawQuery: v.Encode()})

	r, w := io.Pipe()

	go func() {
		if err := json.NewEncoder(w).Encode(body); err != nil {
			w.CloseWithError(err)
		} else {
			w.Close()
		}
	}()

	req, err := http.NewRequestWithContext(ctx, http.MethodPut, endpoint.String(), r)
	if err != nil {
		return nil, err
	}

	res, err := m.client.Do(req)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	statusOK := res.StatusCode >= 200 && res.StatusCode < 300
	if !statusOK {
		return nil, fmt.Errorf("failed to update automod settings (%d)", res.StatusCode)
	}

	var data UpdateAutoModSettingsResponse
	if err := json.NewDecoder(res.Body).Decode(&data); err != nil {
		return nil, err
	}

	return &data, nil
}