package issues

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

//curl -u olivier@circleci.com:"$(cat ~/jiratoken)" 'https://circleci.atlassian.net/rest/api/2/search?jql=sprint+in+openSprints()+and+project=CIAM'

var jcl = http.Client{}

type Issue struct {
	Summary     string
	Description string
	Comments    []Comment
}

type Comment struct {
	Author Author
	Body   string
}

type Author struct {
	DisplayName  string
	EmailAddress string
}

type JiraSearchResp struct {
	Issues []RespIssue
}

type RespIssue struct {
	Key    string
	Fields map[string]any
}

type UserSearchResp struct {
	AccountID string `json:"accountId"`
	Name      string `json:"name"`
}

func getUserAccountID(instance, user string) (string, error) {
	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("https://%s/rest/api/3/user/search?query=%s", instance, user), nil)
	if err != nil {
		return "", fmt.Errorf("error building jira user search request: %w", err)
	}
	req.SetBasicAuth(user, os.Getenv("JIRA_TOKEN"))
	req.Header.Add("Accept", "application/json")
	resp, err := jcl.Do(req)
	if err != nil {
		return "", fmt.Errorf("error executing jira user search request: %w", err)
	}
	if resp.StatusCode >= 400 {
		b := bytes.NewBuffer(nil)
		io.Copy(b, resp.Body)
		return "", fmt.Errorf("error talking to jira: %s", b.String())
	}

	dec := json.NewDecoder(resp.Body)
	var users []UserSearchResp
	err = dec.Decode(&users)
	if err != nil {
		return "", fmt.Errorf("error decoding jira user search response: %w", err)
	}

	if len(users) == 0 {
		return "", fmt.Errorf("no user found with query %s", user)
	}

	return users[0].AccountID, nil
}

func GetIssues(instance, user, from, to string) ([]Issue, error) {
	// First get the user's account ID
	accountID, err := getUserAccountID(instance, user)
	if err != nil {
		return nil, fmt.Errorf("error getting user account ID: %w", err)
	}

	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("https://%s/rest/api/3/search/jql", instance), nil)
	if err != nil {
		return nil, fmt.Errorf("error building jira search request: %w", err)
	}
	q := req.URL.Query()
	q.Add("jql", fmt.Sprintf("assignee was %s and resolved >= %s and resolved <= %s", accountID, from, to))
	q.Add("fields", "*all")
	req.URL.RawQuery = q.Encode()
	req.SetBasicAuth(user, os.Getenv("JIRA_TOKEN"))
	req.Header.Add("Accept", "application/json")
	resp, err := jcl.Do(req)
	if err != nil {
		return nil, fmt.Errorf("error executing jira search request: %w", err)
	}
	if resp.StatusCode >= 400 {
		b := bytes.NewBuffer(nil)
		io.Copy(b, resp.Body)
		return nil, fmt.Errorf("error talking to jira: %s", b.String())
	}

	dec := json.NewDecoder(resp.Body)
	var jsr *JiraSearchResp
	err = dec.Decode(&jsr)
	if err != nil {
		return nil, fmt.Errorf("error decoding jira search response: %w", err)
	}

	out := []Issue{}

	for _, i := range jsr.Issues {
		fmt.Println(i)
		iss := Issue{}
		if s, ok := i.Fields["summary"]; ok {
			fmt.Println(s)
			iss.Summary, _ = s.(string)
		}
		if d, ok := i.Fields["description"]; ok {
			fmt.Println(d)
			iss.Description, _ = d.(string)
		}
		if comms, ok := i.Fields["comment"].([]map[string]any); ok && len(comms) > 0 {
			iss.Comments = make([]Comment, 0, len(comms))
			for _, c2 := range comms {
				iss.Comments = append(iss.Comments, Comment{Author{DisplayName: c2["displayName"].(string), EmailAddress: c2["emailAddress"].(string)}, c2["body"].(string)})

			}
		}
		out = append(out, iss)

	}

	return out, nil
}