/*
    MastoGem, A Mastodon proxy for Gemini
    Copyright (C) 2021 Romain de Laage

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/
package main

import (
	"net/http"
	"log"
	"encoding/json"
	"io"
	"fmt"
)

func getBlogAndReblog(baseURL, account string) ([]Blog, error) {
	if baseURL == "" || account == "" {
		log.Println("baseURL or account is empty")
		return nil, fmt.Errorf("BaseURL or account is empty")
	}

	resp, err := http.Get(baseURL + "/api/v1/accounts/" + account + "/statuses?exclude_reblogs=false&exclude_replies=true")
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return nil, fmt.Errorf("Failed to request Mastodon API")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return nil, fmt.Errorf("Mastodon instance failed")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return nil, fmt.Errorf("Failed to read Mastodon response body")
	}

	var blogs []Blog
	err = json.Unmarshal(body, &blogs)
	if err != nil {
		log.Println("Mastodon response %s", err)
		return nil, fmt.Errorf("Failed to parse Mastodon response")
	}

	return blogs, nil
}

func getBlog(baseURL, account string) ([]Blog, error) {
	if baseURL == "" || account == "" {
		log.Println("baseURL or account is empty")
		return nil, fmt.Errorf("BaseURL or account is empty")
	}

	resp, err := http.Get(baseURL + "/api/v1/accounts/" + account + "/statuses?exclude_reblogs=true&exclude_replies=true")
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return nil, fmt.Errorf("Failed to request Mastodon API")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return nil, fmt.Errorf("Mastodon instance failed")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return nil, fmt.Errorf("Failed to read Mastodon response body")
	}

	var blogs []Blog
	err = json.Unmarshal(body, &blogs)
	if err != nil {
		log.Println("Mastodon response %s", err)
		return nil, fmt.Errorf("Failed to parse Mastodon response")
	}

	return blogs, nil
}

func getTimeline(baseURL string) ([]Blog, error) {
	var toots []Blog

	if baseURL == "" {
		log.Println("baseURL is empty")
		return toots, fmt.Errorf("baseURL is empty")
	}

	resp, err := http.Get(baseURL + "/api/v1/timelines/public")
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return toots, fmt.Errorf("API request failed")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return toots, fmt.Errorf("API response is not 200")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return toots, fmt.Errorf("Failed to read response")
	}

	err = json.Unmarshal(body, &toots)
	if err != nil {
		log.Println("Mastodon response %s", err)
		return toots, fmt.Errorf("Failed to parse response")
	}

	return toots, nil
}

func getAccount(baseURL, accountId string) (Account, error) {
	if baseURL == "" || accountId == "" {
		log.Println("baseURL or account is empty")
		return Account{}, fmt.Errorf("baseURL or account is empty")
	}

	resp, err := http.Get(baseURL + "/api/v1/accounts/" + accountId)
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return Account{}, fmt.Errorf("API request failed")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return Account{}, fmt.Errorf("API response is not 200")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return Account{}, fmt.Errorf("Failed to read response")
	}

	var account Account
	err = json.Unmarshal(body, &account)
	if err != nil {
		log.Println("Mastodon response %s", err)
		return Account{}, fmt.Errorf("Failed to parse response")
	}

	return account, nil
}

func getToot(baseURL, tootId string) (Blog, error) {
	if baseURL == "" || tootId == "" {
		log.Println("baseURL or tootID is empty")
		return Blog{}, fmt.Errorf("baseURL or tootID is empty")
	}

	resp, err := http.Get(baseURL + "/api/v1/statuses/" + tootId)
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return Blog{}, fmt.Errorf("API request failed")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return Blog{}, fmt.Errorf("API response is not 200")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return Blog{}, fmt.Errorf("Failed to read response")
	}

	var toot Blog
	err = json.Unmarshal(body, &toot)
	if err != nil {
		log.Println("Mastodon response %s", err)
		return Blog{}, fmt.Errorf("Failed to parse response")
	}

	return toot, nil
}

func getMedia(mediaURL string) (string, []byte, error) {
	if mediaURL == "" {
		log.Println("mediaURL is empty")
		return "", nil, fmt.Errorf("mediaURL is empty")
	}

	resp, err := http.Get(mediaURL)
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return "", nil, fmt.Errorf("API request failed")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return "", nil, fmt.Errorf("API response is not 200")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return "", nil, fmt.Errorf("Failed to read response")
	}

	return resp.Header["Content-Type"][0], body , nil
}

func getThread(baseURL, tootId string) (Thread, error) {
	if baseURL == "" || tootId == "" {
		log.Println("baseURL or tootID is empty")
		return Thread{}, fmt.Errorf("baseURL or tootID is empty")
	}

	resp, err := http.Get(baseURL + "/api/v1/statuses/" + tootId + "/context")
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return Thread{}, fmt.Errorf("API request failed")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return Thread{}, fmt.Errorf("API response is not 200")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return Thread{}, fmt.Errorf("Failed to read response")
	}

	var thread Thread
	err = json.Unmarshal(body, &thread)
	if err != nil {
		log.Println("Mastodon response %s", err)
		return Thread{}, fmt.Errorf("Failed to parse response")
	}

	return thread, nil
}

func getTag(baseURL, tag string) ([]Blog, error) {
	if baseURL == "" || tag == "" {
		log.Println("baseURL or tag is empty")
		return nil, fmt.Errorf("baseURL or tag is empty")
	}

	resp, err := http.Get(baseURL + "/api/v1/timelines/tag/" + tag)
	if err != nil {
		log.Println("Mastodon API request: %s", err)
		return nil, fmt.Errorf("API request failed")
	}

	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		log.Println("Mastodon API response: %s", resp.Status)
		return nil, fmt.Errorf("API response is not 200")
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Println("Mastodon response body: %s", err)
		return nil, fmt.Errorf("Failed to read response")
	}

	var blogs []Blog
	err = json.Unmarshal(body, &blogs)
	if err != nil {
		log.Println("Mastodon response: %s", err)
		return nil, fmt.Errorf("Failed to parse response")
	}

	return blogs, nil
}