package cmd

import (
	"fmt"
	"strings"

	"github.com/runescape-wiki/rsw/internal/extract"
	"github.com/runescape-wiki/rsw/internal/render"
	"github.com/runescape-wiki/rsw/internal/wiki"
	"github.com/spf13/cobra"
)

func newQuestCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "quest <name>",
		Short: "Look up quest requirements, items needed, and rewards",
		Long: `Searches for a quest and displays its details: skill requirements,
quest prerequisites, items needed, enemies to defeat, and rewards.

With --ironman, flags items that need self-sufficient acquisition and
notes which combat encounters might be dangerous for HCIM.

Examples:
  rsw osrs quest "Monkey Madness I"
  rsw rs3 quest "Plague's End" --ironman`,
		Args: cobra.MinimumNArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			name := args[0]
			wikiClient := wiki.NewClient(GameBaseURL())

			// Try fetching the page directly first (exact title match)
			page, err := wikiClient.GetPage(name)
			if err != nil {
				// Fall back to search
				results, err := wikiClient.Search(name, 5)
				if err != nil {
					return fmt.Errorf("search failed: %w", err)
				}
				if len(results) == 0 {
					return fmt.Errorf("no wiki page found for quest %q", name)
				}
				page, err = wikiClient.GetPage(results[0].Title)
				if err != nil {
					return fmt.Errorf("failed to fetch page: %w", err)
				}
			}

			if Raw() {
				fmt.Println(page.Wikitext)
				return nil
			}

			templates := extract.ParseTemplates(page.Wikitext)
			md := render.New()
			md.H1(page.Title)

			// Extract from Infobox Quest
			questBox := extract.FindTemplate(templates, "Infobox Quest")
			if questBox == nil {
				questBox = extract.FindTemplate(templates, "Infobox quest")
			}

			if questBox != nil {
				md.H2("Overview")
				md.KV("Members", questBox.Params["members"])
				md.KV("Difficulty", questBox.Params["difficulty"])
				md.KV("Length", questBox.Params["length"])
				md.KV("Series", questBox.Params["series"])
				md.KV("Age", questBox.Params["age"])
				md.KV("Release", questBox.Params["release"])
				md.Newline()
			}

			// Extract from Quest details template (OSRS stores requirements here)
			details := extract.FindTemplate(templates, "Quest details")
			if details == nil {
				details = extract.FindTemplate(templates, "Quest Details")
			}

			if details != nil {
				renderQuestTemplateField(md, details, "difficulty", "Difficulty")
				renderQuestTemplateField(md, details, "length", "Length")
				renderQuestTemplateField(md, details, "requirements", "Requirements")
				renderQuestTemplateField(md, details, "items", "Items Required")
				renderQuestTemplateField(md, details, "recommended", "Recommended")
				renderQuestTemplateField(md, details, "kills", "Enemies to Defeat")
			}

			// Also try section-based extraction as fallback
			renderQuestSection(md, page, wikiClient, page.Title, "Requirements",
				[]string{"requirements", "skill requirements"})
			renderQuestSection(md, page, wikiClient, page.Title, "Items Required",
				[]string{"items required", "items needed", "required items"})
			renderQuestSection(md, page, wikiClient, page.Title, "Enemies to Defeat",
				[]string{"enemies to defeat", "enemies"})
			renderQuestSection(md, page, wikiClient, page.Title, "Rewards",
				[]string{"rewards"})

			if Ironman() {
				md.HR()
				md.H2("Ironman Notes")
				md.P("*Consider the following for self-sufficient play:*")
				md.Bullet("All required items must be obtained without the GE")
				md.Bullet("Check drop sources and shop availability for each required item")
				md.Bullet("Boss/enemy encounters may be dangerous for HCIM — review combat levels and mechanics")
				md.Newline()
			}

			fmt.Print(md.String())
			return nil
		},
	}
}

func renderQuestTemplateField(md *render.Builder, details *extract.Infobox, field, heading string) {
	val := details.Params[field]
	if val == "" {
		return
	}
	cleaned := extract.CleanWikitext(val)
	cleaned = strings.TrimSpace(cleaned)
	if cleaned == "" {
		return
	}
	md.H2(heading)
	md.P(cleaned)
}

func renderQuestSection(md *render.Builder, page *wiki.ParsedPage, client *wiki.Client,
	title string, heading string, sectionNames []string) {

	for _, s := range page.Sections {
		lower := strings.ToLower(s.Line)
		for _, target := range sectionNames {
			if lower == target || strings.Contains(lower, target) {
				idx := 0
				_, _ = fmt.Sscanf(s.Index, "%d", &idx)
				if idx > 0 {
					sectionPage, err := client.GetPageSection(title, idx)
					if err == nil {
						plain := extract.ExtractPlainText(sectionPage.Wikitext)
						if strings.TrimSpace(plain) != "" {
							md.H2(heading)
							md.P(plain)
						}
					}
				}
				return
			}
		}
	}
}

func init() {
	RegisterCommand(newQuestCmd)
}