package game

import (
	"fmt"
	"strings"

	"thehouseoficarus/internal/behavior"
	"thehouseoficarus/internal/net"
	"thehouseoficarus/internal/player"
)

func (g *Game) executePlant(sess *net.Session, args []string, rawInput string) {
	p := sess.Player
	g.cancelAction(p)
	if len(args) == 0 {
		sess.WriteLine("Plant what?")
	} else {
		g.doPlant(sess, strings.Join(args, " "))
	}
}

func (g *Game) executeHarvest(sess *net.Session, args []string, rawInput string) {
	p := sess.Player
	g.cancelAction(p)
	if len(args) == 0 {
		g.doHarvest(sess, "")
	} else {
		g.doHarvest(sess, strings.Join(args, " "))
	}
}

func (g *Game) executeRake(sess *net.Session, args []string, rawInput string) {
	p := sess.Player
	g.cancelAction(p)
	if len(args) == 0 {
		g.doRake(sess, "")
	} else {
		g.doRake(sess, strings.Join(args, " "))
	}
}

func (g *Game) executeWater(sess *net.Session, args []string, rawInput string) {
	p := sess.Player
	g.cancelAction(p)
	if len(args) == 0 {
		g.doWater(sess, "")
	} else {
		g.doWater(sess, strings.Join(args, " "))
	}
}

func (g *Game) executeCure(sess *net.Session, args []string, rawInput string) {
	p := sess.Player
	g.cancelAction(p)
	if len(args) == 0 {
		g.doCure(sess, "")
	} else {
		g.doCure(sess, strings.Join(args, " "))
	}
}

func (g *Game) doPlant(sess *net.Session, input string) {
	p := sess.Player

	if input == "" {
		sess.WriteLine("Plant what?")
		return
	}

	matches := g.findInventoryMatches(input, p)
	if len(matches) == 0 {
		sess.WriteLine(fmt.Sprintf("You don't have any '%s'.", input))
		return
	}

	unique := uniqueItemNames(matches)
	if len(unique) > 1 {
		g.showWhichOne(sess, matches)
		return
	}

	seedID := matches[0].ID
	seedDef, err := g.ItemStore.Load(seedID)
	if err != nil || seedDef.FarmPatchType == "" {
		sess.WriteLine("You can't plant that.")
		return
	}

	farmLevel := p.Level(player.Farming)
	if seedDef.FarmLevel > 0 && farmLevel < seedDef.FarmLevel {
		sess.WriteLine(fmt.Sprintf("You need level %d farming to plant that. Your farming level is %d.", seedDef.FarmLevel, farmLevel))
		return
	}

	if !g.hasToolType(p, "spade") {
		sess.WriteLine("You need a spade to plant seeds.")
		return
	}

	patchDefID := seedDef.FarmPatchType + "_patch"
	objInstances := g.World.FindObjInstances(p.RoomID, patchDefID)
	if len(objInstances) == 0 {
		sess.WriteLine("There's no suitable patch here to plant that.")
		return
	}

	var prefix string
	for _, obj := range objInstances {
		pref := farmFlagPrefix(patchDefID, obj.Index)
		if pref == "" {
			continue
		}
		g.ensureFarmState(p, pref)
		weeds, _ := p.Flags[pref+"_weeds"].(bool)
		seedPlanted, _ := p.Flags[pref+"_seed"].(string)
		if !weeds && seedPlanted == "" {
			prefix = pref
			break
		}
	}

	if prefix == "" {
		sess.WriteLine("All patches here have something in them. Rake them first.")
		return
	}

	// The seed is consumed when the plant action COMPLETES (advancePlant),
	// not here: an interrupted action must not destroy the seed.

	p.Action = &behavior.Action{
		Type:       "plant",
		TargetID:   seedID,
		TargetName: seedDef.Name,
		WaitLeft:   2,
		Data: &behavior.FarmData{
			SeedID: seedID,
			Prefix: prefix,
			XP:     float64(seedDef.FarmPlantXP),
		},
	}

	g.saveCharacter(p)
}

func (g *Game) doHarvest(sess *net.Session, input string) {
	p := sess.Player

	prefix := g.findFarmPatch(p, input, func(flags map[string]any, prefix string) bool {
		ready, _ := flags[prefix+"_ready"].(bool)
		return ready
	})
	if prefix == "" {
		if input != "" {
			sess.WriteLine("That patch isn't ready to harvest.")
		} else {
			sess.WriteLine("There's nothing ready to harvest here.")
		}
		return
	}

	g.ensureFarmState(p, prefix)
	ready, _ := p.Flags[prefix+"_ready"].(bool)
	if !ready {
		sess.WriteLine("There's nothing ready to harvest here.")
		return
	}

	if !g.hasToolType(p, "spade") {
		sess.WriteLine("You need a spade to harvest.")
		return
	}

	seedID, _ := p.Flags[prefix+"_seed"].(string)
	if seedID == "" {
		sess.WriteLine("There's nothing planted here.")
		return
	}

	seedDef, err := g.ItemStore.Load(seedID)
	if err != nil {
		sess.WriteLine("Error loading seed data.")
		return
	}

	product := seedDef.FarmProduct
	if product == "" {
		sess.WriteLine("This crop has no harvest product defined.")
		return
	}

	productDef, _ := g.ItemStore.Load(product)
	productName := product
	if productDef != nil {
		productName = productDef.Name
	}

	if p.FreeSlots() <= 0 && (productDef == nil || !productDef.Stackable || p.CountItem(product) == 0) {
		sess.WriteLine("Your inventory is full.")
		return
	}

	minYield := seedDef.FarmMinYield
	maxYield := seedDef.FarmMaxYield
	if minYield <= 0 {
		minYield = 3
	}
	if maxYield <= 0 {
		maxYield = 10
	}
	harvestXP := seedDef.FarmHarvestXP

	p.Action = &behavior.Action{
		Type:       "harvest",
		TargetID:   prefix,
		TargetName: productName,
		WaitLeft:   3,
		Data: &behavior.FarmData{
			Prefix:   prefix,
			SeedID:   seedID,
			Product:  product,
			MinYield: float64(minYield),
			MaxYield: float64(maxYield),
			XP:       float64(harvestXP),
		},
	}

	g.saveCharacter(p)
}

func (g *Game) doRake(sess *net.Session, input string) {
	p := sess.Player

	if !g.hasToolType(p, "rake") {
		sess.WriteLine("You need a rake to do that.")
		return
	}

	prefix := g.findFarmPatch(p, input, func(flags map[string]any, prefix string) bool {
		weeds, _ := flags[prefix+"_weeds"].(bool)
		dead, _ := flags[prefix+"_dead"].(bool)
		return weeds || dead
	})
	if prefix == "" {
		if input != "" {
			sess.WriteLine("That patch doesn't need raking.")
		} else {
			sess.WriteLine("There's nothing here that needs raking.")
		}
		return
	}

	g.ensureFarmState(p, prefix)
	weeds, _ := p.Flags[prefix+"_weeds"].(bool)
	dead, _ := p.Flags[prefix+"_dead"].(bool)
	if !weeds && !dead {
		sess.WriteLine("The patch doesn't need raking.")
		return
	}

	patchName := patchDisplayName(prefix)

	p.Action = &behavior.Action{
		Type:       "rake",
		TargetID:   prefix,
		TargetName: patchName,
		WaitLeft:   4,
		Data: &behavior.FarmData{
			Prefix: prefix,
		},
	}

	g.saveCharacter(p)
}

func (g *Game) doWater(sess *net.Session, input string) {
	p := sess.Player

	if !g.hasToolType(p, "watering_can") {
		sess.WriteLine("You need a watering can to do that.")
		return
	}

	prefix := g.findFarmPatch(p, input, func(flags map[string]any, prefix string) bool {
		seed, _ := flags[prefix+"_seed"].(string)
		if seed == "" {
			return false
		}
		ready, _ := flags[prefix+"_ready"].(bool)
		dead, _ := flags[prefix+"_dead"].(bool)
		watered, _ := flags[prefix+"_watered"].(bool)
		return !dead && !ready && !watered
	})
	if prefix == "" {
		if input != "" {
			sess.WriteLine("That patch doesn't need watering.")
		} else {
			sess.WriteLine("There's nothing here that needs watering.")
		}
		return
	}

	g.ensureFarmState(p, prefix)
	seedID, _ := p.Flags[prefix+"_seed"].(string)
	if seedID == "" {
		sess.WriteLine("There's nothing planted here to water.")
		return
	}
	ready, _ := p.Flags[prefix+"_ready"].(bool)
	if ready {
		sess.WriteLine("The crop is already fully grown.")
		return
	}
	watered, _ := p.Flags[prefix+"_watered"].(bool)
	if watered {
		sess.WriteLine("The patch is already watered.")
		return
	}

	patchName := patchDisplayName(prefix)

	p.Action = &behavior.Action{
		Type:       "water",
		TargetID:   prefix,
		TargetName: patchName,
		WaitLeft:   2,
		Data: &behavior.FarmData{
			Prefix: prefix,
		},
	}

	g.saveCharacter(p)
}

func (g *Game) doCure(sess *net.Session, input string) {
	p := sess.Player

	if !p.HasItem("plant_cure") {
		sess.WriteLine("You don't have any plant cure.")
		return
	}

	prefix := g.findFarmPatch(p, input, func(flags map[string]any, prefix string) bool {
		diseased, _ := flags[prefix+"_diseased"].(bool)
		return diseased
	})
	if prefix == "" {
		if input != "" {
			sess.WriteLine("That patch isn't diseased.")
		} else {
			sess.WriteLine("There's nothing here that needs curing.")
		}
		return
	}

	g.ensureFarmState(p, prefix)
	diseased, _ := p.Flags[prefix+"_diseased"].(bool)
	if !diseased {
		sess.WriteLine("The patch isn't diseased.")
		return
	}

	patchName := patchDisplayName(prefix)

	p.Action = &behavior.Action{
		Type:       "cure",
		TargetID:   prefix,
		TargetName: patchName,
		WaitLeft:   2,
		Data: &behavior.FarmData{
			Prefix: prefix,
		},
	}

	g.saveCharacter(p)
}

func (g *Game) ShowFarmPatchDetail(sess *net.Session, p *player.Player, prefix, defID string, index int) {
	weeds, _ := p.Flags[prefix+"_weeds"].(bool)
	if weeds {
		sess.WriteLine("  Status: Weeds")
		sess.WriteLine("  (Rake to clear before planting)")
		return
	}

	seedID, _ := p.Flags[prefix+"_seed"].(string)
	if seedID == "" {
		sess.WriteLine("  Status: Empty")
		sess.WriteLine("  (Ready to plant)")
		return
	}

	seedName := seedID
	if def, err := g.ItemStore.Load(seedID); err == nil {
		seedName = def.Name
	}

	dead, _ := p.Flags[prefix+"_dead"].(bool)
	if dead {
		sess.WriteLine("  Status: Dead")
		sess.WriteLine(fmt.Sprintf("  Planted: %s", seedName))
		sess.WriteLine("  (Rake to clear)")
		return
	}

	diseased, _ := p.Flags[prefix+"_diseased"].(bool)
	if diseased {
		sess.WriteLine("  Status: Diseased!")
		sess.WriteLine(fmt.Sprintf("  Planted: %s", seedName))
		sess.WriteLine("  (Use plant cure to save it)")
		return
	}

	ready, _ := p.Flags[prefix+"_ready"].(bool)
	if ready {
		sess.WriteLine("  Status: Ready to harvest!")
		sess.WriteLine(fmt.Sprintf("  Planted: %s", seedName))
		return
	}

	stage := intFromFlag(p.Flags, prefix+"_stage")
	maxStages := 4
	if def, err := g.ItemStore.Load(seedID); err == nil && def.FarmStages > 0 {
		maxStages = def.FarmStages
	}
	watered, _ := p.Flags[prefix+"_watered"].(bool)

	sess.WriteLine(fmt.Sprintf("  Status: Growing (stage %d/%d)", stage, maxStages))
	sess.WriteLine(fmt.Sprintf("  Planted: %s", seedName))
	sess.WriteLine(fmt.Sprintf("  Watered: %s", boolToYes(watered)))
	sess.WriteLine(fmt.Sprintf("  Diseased: %s", boolToYes(diseased)))
}

func boolToYes(b bool) string {
	if b {
		return "Yes"
	}
	return "No"
}

func (g *Game) findFarmPatch(p *player.Player, input string, matcher func(map[string]any, string) bool) (prefix string) {
	objInstances := g.World.AllObjInstances(p.RoomID)
	if len(objInstances) == 0 {
		return ""
	}

	type patchInfo struct {
		prefix string
		defID  string
		index  int
		name   string
	}
	var patches []patchInfo

	for _, obj := range objInstances {
		if !farmPatchDefIDs[obj.DefID] {
			continue
		}
		g.ensureFarmState(p, farmFlagPrefix(obj.DefID, obj.Index))
	}

	for _, obj := range objInstances {
		if !farmPatchDefIDs[obj.DefID] {
			continue
		}
		pref := farmFlagPrefix(obj.DefID, obj.Index)
		if pref == "" {
			continue
		}
		if !matcher(p.Flags, pref) {
			continue
		}
		var name string
		if def, err := g.ObjectStore.Load(obj.DefID); err == nil {
			name = def.Name
		} else {
			name = obj.DefID
		}
		patches = append(patches, patchInfo{prefix: pref, defID: obj.DefID, index: obj.Index, name: name})
	}

	if len(patches) == 0 {
		return ""
	}

	if input == "" {
		return patches[0].prefix
	}

	lower := strings.ToLower(input)
	for _, pi := range patches {
		if strings.Contains(lower, strings.ToLower(pi.name)) {
			return pi.prefix
		}
	}
	for _, pi := range patches {
		if strings.Contains(lower, pi.prefix) {
			return pi.prefix
		}
	}

	return ""
}