package companion

import (
	"fmt"
	"strings"
)

// AITemplateSelector binds one saved profile to a verified AICharacter.lst
// entry.  The selector is part of the offline contract; it does not imply
// that the current client has loaded or executed the entry.
type AITemplateSelector struct {
	Key         string `json:"key"`
	Job         uint8  `json:"job"`
	ClassID     uint16 `json:"class_id"`
	Behavior    string `json:"behavior"`
	ComboPreset string `json:"combo_preset"`
	APCCode     int64  `json:"apc_code"`
	AICPath     string `json:"aic_path"`
	BaseAICPath string `json:"base_aic_path"`
	Legacy      bool   `json:"legacy"`
}

type aiTemplateVariant struct {
	Code int64
	Path string
}

type aiTemplatePair struct {
	Profession string
	Assist     aiTemplateVariant
	Aggressive aiTemplateVariant
}

// These are the stable APC/AIC pairs selected by the checked-in client native
// projection contract (90CN_companion_p0.h) and verified against the current
// AICharacter.lst.  The server must patch the AIC that the client actually
// spawns.  The old friendly-doll entries (for example christian_ronaldo and
// yugo) are valid archive assets, but they are not the active baseline APCs
// used by the native companion projection and therefore cannot change live
// behaviour.
//
// Assist and aggressive profiles intentionally share the active baseline AIC
// for a job.  The profile-specific action/destination/move programs are
// compiled into that AIC; the caller must build/select one profile for a
// baseline at a time because a single PVF cannot contain two different
// programs at the same archive path.
var aiTemplatePairs = map[uint8]aiTemplatePair{
	0:  {"swordman", aiTemplateVariant{900, "aicharacter/_bizarre/swordman/mirror_swordman/mirror_swordman.aic"}, aiTemplateVariant{900, "aicharacter/_bizarre/swordman/mirror_swordman/mirror_swordman.aic"}},
	1:  {"fighter", aiTemplateVariant{5405, "aicharacter/fighter/arad_fighter/arad_fighter_doll.aic"}, aiTemplateVariant{5405, "aicharacter/fighter/arad_fighter/arad_fighter_doll.aic"}},
	2:  {"gunner", aiTemplateVariant{10903, "aicharacter/_bizarre/gunner/mirror_gunner/mirror_gunner.aic"}, aiTemplateVariant{10903, "aicharacter/_bizarre/gunner/mirror_gunner/mirror_gunner.aic"}},
	3:  {"mage", aiTemplateVariant{15902, "aicharacter/_bizarre/magician/mirror_magician/mirror_magician.aic"}, aiTemplateVariant{15902, "aicharacter/_bizarre/magician/mirror_magician/mirror_magician.aic"}},
	4:  {"priest", aiTemplateVariant{20902, "aicharacter/_bizarre/priest/mirror_priest/mirror_priest.aic"}, aiTemplateVariant{20902, "aicharacter/_bizarre/priest/mirror_priest/mirror_priest.aic"}},
	5:  {"atgunner", aiTemplateVariant{25900, "aicharacter/_bizarre/atgunner/mirror_atgunner/mirror_atgunner.aic"}, aiTemplateVariant{25900, "aicharacter/_bizarre/atgunner/mirror_atgunner/mirror_atgunner.aic"}},
	6:  {"thief", aiTemplateVariant{30901, "aicharacter/_bizarre/Thief/mirror_Thief/mirror_Thief.aic"}, aiTemplateVariant{30901, "aicharacter/_bizarre/Thief/mirror_Thief/mirror_Thief.aic"}},
	7:  {"atfighter", aiTemplateVariant{35903, "aicharacter/_bizarre/atfighter/mirror_atfighter/mirror_atfighter.aic"}, aiTemplateVariant{35903, "aicharacter/_bizarre/atfighter/mirror_atfighter/mirror_atfighter.aic"}},
	8:  {"atmage", aiTemplateVariant{40800, "aicharacter/autocharacter/atmage/auto1/auto_atmage1.aic"}, aiTemplateVariant{40800, "aicharacter/autocharacter/atmage/auto1/auto_atmage1.aic"}},
	9:  {"demonic_swordman", aiTemplateVariant{902, "aicharacter/_bizarre/swordman/despair_darkknight/despair_darkknight.aic"}, aiTemplateVariant{902, "aicharacter/_bizarre/swordman/despair_darkknight/despair_darkknight.aic"}},
	10: {"creator", aiTemplateVariant{15903, "aicharacter/_bizarre/magician/despair_creator/despair_creator.aic"}, aiTemplateVariant{15903, "aicharacter/_bizarre/magician/despair_creator/despair_creator.aic"}},
	11: {"atswordman", aiTemplateVariant{56901, "aicharacter/_bizarre/atswordman/despair_atswordman/despair_atswordman.aic"}, aiTemplateVariant{56901, "aicharacter/_bizarre/atswordman/despair_atswordman/despair_atswordman.aic"}},
	12: {"knight", aiTemplateVariant{60901, "aicharacter/_bizarre/knight/despair_knight/despair_knight.aic"}, aiTemplateVariant{60901, "aicharacter/_bizarre/knight/despair_knight/despair_knight.aic"}},
	13: {"demonic_lancer", aiTemplateVariant{65001, "aicharacter/demoniclancer/mirror_demonicLancer/mirror_demonicLancer.aic"}, aiTemplateVariant{65001, "aicharacter/demoniclancer/mirror_demonicLancer/mirror_demonicLancer.aic"}},
	// job 14（女圣职者）必须保持 70003 `atpriest/despair_atpriest.aic`，**不要改成 70002**。
	//
	// 曾试过改成 70002 `atpriest/mirror_demoniclancer.aic`，实测完全无效。原因是
	// 选哪个 APC 由**客户端内置基线表**决定，服务端的 ai_template 只决定“补哪条 AIC”。
	//
	// 90CN_companion_p0.h 的基线表格式是 {job, sourceGrow, apcCode, level, aicJob, aicGrow}：
	//
	//	{14,0,70003,70,14,0},      // <- stable 外壳（sourceGrow=0 且 aicGrow=0）
	//	{14,1,71200,86,14,1},
	//	{14,2,71203,86,14,2},
	//
	// ProjectionBaselineContract::TrySelect 的逻辑是
	//
	//	selected = stable ? *stable : *exact;    // 优先 grow=0 的稳定外壳
	//
	// 所以奶妈 grow_type=33（firstGrow=1, awakening=2）虽然 exact 命中 {14,1,71200}，
	// 最终仍被 stable 抢走，**客户端永远用 APC 70003 的 AIC**。服务端把模板改成 70002
	// 只会让覆盖打到一条没人用的 AIC 上，反而让 70003 丢掉 12 格快捷栏程序 —— 表现为
	// “能召唤但不放技能、不攻击”。
	//
	// 另外注意：外壳 APC 固定是 grow=0 的形态，客户端只把源角色的 grow/觉醒/技能桥接
	// 到 AIC 的每实例副本上，**视觉职业仍然是那个 grow=0 外壳**。所以支援兵看起来
	// “未觉醒”是这套投影设计的固有限制，不是模板选错。
	14: {"atpriest", aiTemplateVariant{70003, "aicharacter/atpriest/despair_atpriest/despair_atpriest.aic"}, aiTemplateVariant{70003, "aicharacter/atpriest/despair_atpriest/despair_atpriest.aic"}},
	15: {"gunblader", aiTemplateVariant{75001, "aicharacter/gunblader/mirror_gunblader/mirror_gunblader.aic"}, aiTemplateVariant{75001, "aicharacter/gunblader/mirror_gunblader/mirror_gunblader.aic"}},
}

func SelectAITemplate(profile AIProfile, job uint16) AITemplateSelector {
	profile = NormalizeAIProfile(profile)
	job8 := uint8(job)
	pair, ok := aiTemplatePairs[job8]
	if !ok {
		job8 = 1
		pair = aiTemplatePairs[job8]
	}
	classID := profile.ClassID
	if classID == 0 {
		classID = job
	}
	variant := pair.Assist
	if profile.Behavior == "aggressive" {
		variant = pair.Aggressive
	}
	return AITemplateSelector{
		Key:         fmt.Sprintf("%s/%s/job-%02d/class-%d/%s", pair.Profession, profile.Behavior, job8, classID, artifactSlug(profile.ComboPreset)),
		Job:         job8,
		ClassID:     classID,
		Behavior:    profile.Behavior,
		ComboPreset: profile.ComboPreset,
		APCCode:     variant.Code,
		AICPath:     variant.Path,
		BaseAICPath: variant.Path,
		Legacy:      variant.Code == 5405,
	}
}

// ResolveAITemplate is the descriptive name used by server projection code;
// SelectAITemplate remains the compiler-facing alias.
func ResolveAITemplate(profile AIProfile, job uint16) AITemplateSelector {
	return SelectAITemplate(profile, job)
}

func ValidateAITemplateSelector(selector AITemplateSelector) error {
	if strings.TrimSpace(selector.Key) == "" || selector.APCCode <= 0 || selector.AICPath == "" {
		return ErrSelection
	}
	want := SelectAITemplate(AIProfile{Behavior: selector.Behavior, ClassID: selector.ClassID, ComboPreset: selector.ComboPreset}, uint16(selector.Job))
	if selector.APCCode != want.APCCode || !strings.EqualFold(selector.AICPath, want.AICPath) {
		return ErrSelection
	}
	return nil
}

func (s AITemplateSelector) Valid() bool {
	return ValidateAITemplateSelector(s) == nil
}