package jiraclient

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

func NewJiraClient(username, token, domain string) *JiraClient {
	client := &http.Client{}

	return &JiraClient{
		Username: username,
		Token:    token,
		Domain:   domain,
		Client:   client,
	}
}

// JiraClient manages communication with Jira Cloud's V2 REST API.
type JiraClient struct {
	Username string
	Token    string
	Domain   string
	Client   *http.Client
}

func (c JiraClient) get(url string, queryParams map[string]string) ([]byte, error) {
	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return []byte{}, err
	}
	req.SetBasicAuth(c.Username, c.Token)

	if queryParams != nil {
		q := req.URL.Query()
		for k, v := range queryParams {
			q.Add(k, v)
		}
		req.URL.RawQuery = q.Encode()
	}

	resp, err := c.Client.Do(req)
	if err != nil {
		return []byte{}, err
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	return body, err
}

func (c JiraClient) GetIssue(keyOrId string) (Issue, error) {
	var issue Issue

	url := fmt.Sprintf("https://%s.atlassian.net/rest/api/2/issue/%s", c.Domain, keyOrId)

	body, err := c.get(url, nil)
	if err != nil {
		return issue, err
	}

	err = json.Unmarshal(body, &issue)

	return issue, err
}

func (c JiraClient) GetProject(keyOrId string) (Project, error) {
	var project Project

	url := fmt.Sprintf("https://%s.atlassian.net/rest/api/2/project/%s", c.Domain, keyOrId)

	body, err := c.get(url, nil)
	if err != nil {
		return project, err
	}

	err = json.Unmarshal(body, &project)

	return project, err
}

func (c JiraClient) Search(jql string) ([]Issue, error) {
	var issues []Issue

	type SearchResponse struct {
		Issues []Issue `json:"issues"`
	}
	searchResponse := SearchResponse{}

	url := fmt.Sprintf("https://%s.atlassian.net/rest/api/2/search", c.Domain)

	body, err := c.get(url, map[string]string{"jql": jql})
	if err != nil {
		return issues, err
	}

	err = json.Unmarshal(body, &searchResponse)

	return searchResponse.Issues, err
}