// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package print

import (
	"fmt"
	"strings"

	"gitea.dev/tea/modules/stack"
)

// PullStackFields are all available fields to print with PullStacksList()
var PullStackFields = []string{
	"id",
	"title",
	"base",
	"state",
	"auto-restack",
	"entries",
}

// PullStacksList prints a listing of pull request stacks
func PullStacksList(stacks []*stack.Stack, output string, fields []string) error {
	printables := make([]printable, len(stacks))
	for i, s := range stacks {
		printables[i] = &printablePullStack{s}
	}
	t := tableFromItems(fields, printables, isMachineReadable(output))
	return t.print(output)
}

type printablePullStack struct {
	*stack.Stack
}

func (x printablePullStack) FormatField(field string, machineReadable bool) string {
	switch field {
	case "id":
		return fmt.Sprintf("%d", x.ID)
	case "title":
		return x.Title
	case "base":
		return x.BaseBranch
	case "state":
		return x.State
	case "auto-restack":
		return formatBoolean(x.AutoRestack, !machineReadable)
	case "entries":
		return fmt.Sprintf("%d", len(x.Entries))
	}
	return ""
}

// PullStackDetail prints a pull request stack, bottom entry first, rendered to stdout
func PullStackDetail(s *stack.Stack) {
	out := fmt.Sprintf(
		"# Stack #%d: %s (%s)\nbase: **%s**\tauto-restack: %s\n\n",
		s.ID, s.Title, s.State, s.BaseBranch, formatBoolean(s.AutoRestack, true),
	)

	for _, entry := range s.Entries {
		if entry.ParentPullID == 0 {
			out += fmt.Sprintf("- #%d (%s)\n", entry.PullID, entry.State)
		} else {
			out += fmt.Sprintf("- #%d <- #%d (%s)\n", entry.PullID, entry.ParentPullID, entry.State)
		}
	}

	outputMarkdown(strings.TrimRight(out, "\n")+"\n", "")
}