package commands

import (
	"bytes"
	"encoding/json"
	"fmt"

	"git.hangman-lab.top/zhi/HarborForge.Cli/internal/output"
)

type worklogResponse struct {
	ID          int     `json:"id"`
	TaskID      int     `json:"task_id"`
	UserID      int     `json:"user_id"`
	Hours       float64 `json:"hours"`
	Description *string `json:"description"`
	LoggedDate  string  `json:"logged_date"`
	CreatedAt   string  `json:"created_at"`
}

func RunWorklogAdd(taskCode string, hours float64, desc, date, tokenFlag string) {
	if taskCode == "" || hours <= 0 {
		output.Error("usage: hf worklog add --task <task-code> --hours <n> [--desc <text>] [--date <yyyy-mm-dd>]")
	}

	c := newAuthedClient(tokenFlag)
	taskID := resolveTaskID(c, taskCode)
	me := currentUser(c)

	payload := map[string]interface{}{
		"task_id": taskID,
		"user_id": me.ID,
		"hours":   hours,
	}
	if desc != "" {
		payload["description"] = desc
	}
	if date != "" {
		payload["logged_date"] = date
	}

	body, err := json.Marshal(payload)
	if err != nil {
		output.Errorf("cannot marshal payload: %v", err)
	}

	data, err := c.Post("/worklogs", bytes.NewReader(body))
	if err != nil {
		output.Errorf("failed to add worklog: %v", err)
	}

	if output.JSONMode {
		var raw json.RawMessage
		if err := json.Unmarshal(data, &raw); err != nil {
			output.Errorf("invalid JSON response: %v", err)
		}
		output.PrintJSON(raw)
		return
	}

	var resp worklogResponse
	if err := json.Unmarshal(data, &resp); err != nil {
		output.Errorf("cannot parse response: %v", err)
	}
	fmt.Printf("worklog added to %s: #%d (%.2fh)\n", taskCode, resp.ID, resp.Hours)
}

func RunWorklogList(taskCode, username, tokenFlag string) {
	if taskCode == "" && username == "" {
		output.Error("usage: hf worklog list [--task <task-code>] [--user <username>]")
	}
	if taskCode != "" && username != "" {
		output.Error("choose only one of --task <task-code> or --user <username>")
	}

	c := newAuthedClient(tokenFlag)
	path := ""
	if taskCode != "" {
		taskID := resolveTaskID(c, taskCode)
		path = fmt.Sprintf("/tasks/%d/worklogs", taskID)
	} else {
		path = fmt.Sprintf("/users/%s/worklogs", username)
	}

	data, err := c.Get(path)
	if err != nil {
		output.Errorf("failed to list worklogs: %v", err)
	}

	if output.JSONMode {
		var raw json.RawMessage
		if err := json.Unmarshal(data, &raw); err != nil {
			output.Errorf("invalid JSON response: %v", err)
		}
		output.PrintJSON(raw)
		return
	}

	var logs []worklogResponse
	if err := json.Unmarshal(data, &logs); err != nil {
		output.Errorf("cannot parse worklog list: %v", err)
	}

	headers := []string{"ID", "TASK", "USER", "HOURS", "DATE", "DESCRIPTION"}
	var rows [][]string
	for _, item := range logs {
		desc := ""
		if item.Description != nil {
			desc = *item.Description
		}
		if len(desc) > 40 {
			desc = desc[:37] + "..."
		}
		rows = append(rows, []string{
			fmt.Sprintf("%d", item.ID),
			fmt.Sprintf("%d", item.TaskID),
			fmt.Sprintf("%d", item.UserID),
			fmt.Sprintf("%.2f", item.Hours),
			item.LoggedDate,
			desc,
		})
	}
	output.PrintTable(headers, rows)
}