package session

import (
	"context"
	"encoding/json"
	"fmt"
	"os"
	"strconv"
	"strings"

	"ollie/agent"
	"ollie/backend"
	"ollie/toolsrv"
	olog "ollie/log"
	"olliesrv/fs"
)

// SessionFileList defines session-level files (shared across agents).
var SessionFileList = []struct {
	Name    string
	OneShot bool
	Async   bool
}{
	{"plan", false, false},
	{"env", false, false},
}

// AgentFileList defines agent-level files.
var AgentFileList = []struct {
	Name    string
	OneShot bool
	Async   bool
}{
	{"ctl", false, true},
	{"prompt", false, true},
	{"fifo.in", false, true},
	{"fifo.out", true, false},
	{"chat", false, false},
	{"offset", false, false},
	{"cfg", false, false},
	{"state", false, false},
	{"statewait", false, false},
	{"usage", false, false},
	{"cost", false, false},
	{"ctxsz", false, false},
	{"models", false, false},
	{"systemprompt", false, false},
	{"tail", false, false},
	{"prompt.prev", false, false},
	{"context", false, false},
	{"react", false, true},
	{"reactions", false, false},
	{"toolsrv.loaded", false, false},
	{"toolsrv.rev", false, false},
	{"tools", false, false},
}

// FileList is the combined list (for backward compat in tests).
var FileList = append(SessionFileList, AgentFileList...)

// sessionFilePerms returns the permission registry for per-session files.
func sessionFilePerms() map[string]os.FileMode {
	return fs.Perms[fs.PathSessionFile].Files
}

func NewSessionTree(sess *Session, log *olog.Logger, kill func(), rename func(newID string) error, saveTranscript func([]byte) error, invalidateModels func(), toolRegistry *toolsrv.Registry) *fs.Tree {
	h := &sessionHelper{sess: sess, log: log, kill: kill, rename: rename, saveTranscript: saveTranscript, invalidateModels: invalidateModels, toolRegistry: toolRegistry}
	perms := sessionFilePerms()
	specs := make([]fs.FileSpec, len(SessionFileList))
	for i, f := range SessionFileList {
		specs[i] = h.fileSpec(f.Name, perms[f.Name])
		specs[i].OneShot = f.OneShot
		specs[i].Async = f.Async
	}
	return fs.NewSynth(specs)
}

// NewAgentTree builds the file tree for a single agent within a session.
func NewAgentTree(sess *Session, log *olog.Logger, saveTranscript func([]byte) error, invalidateModels func(), toolRegistry *toolsrv.Registry) *fs.Tree {
	h := &sessionHelper{sess: sess, log: log, saveTranscript: saveTranscript, invalidateModels: invalidateModels, toolRegistry: toolRegistry}
	perms := sessionFilePerms()
	specs := make([]fs.FileSpec, len(AgentFileList))
	for i, f := range AgentFileList {
		specs[i] = h.fileSpec(f.Name, perms[f.Name])
		specs[i].OneShot = f.OneShot
		specs[i].Async = f.Async
	}
	return fs.NewSynth(specs)
}

// sessionHelper holds the dependencies needed to build session FileSpecs.
type sessionHelper struct {
	sess             *Session
	log              *olog.Logger
	kill             func()
	rename           func(newID string) error
	saveTranscript   func([]byte) error
	invalidateModels func()
	toolRegistry     *toolsrv.Registry
}

func (h *sessionHelper) fileSpec(name string, mode os.FileMode) fs.FileSpec {
	fs := fs.FileSpec{Name: name, Mode: mode}

	// Read
	switch name {
	case "plan":
		fs.Read = func() ([]byte, error) {
			h.sess.mu.RLock()
			data := make([]byte, len(h.sess.plan))
			copy(data, h.sess.plan)
			h.sess.mu.RUnlock()
			return data, nil
		}
		fs.Size = func() int64 {
			h.sess.mu.RLock()
			n := len(h.sess.plan)
			h.sess.mu.RUnlock()
			return int64(n)
		}
	case "prompt.prev":
		fs.Read = func() ([]byte, error) {
			h.sess.mu.RLock()
			data := make([]byte, len(h.sess.prevPrompt))
			copy(data, h.sess.prevPrompt)
			h.sess.mu.RUnlock()
			return data, nil
		}
	case "reactions":
		fs.Read = func() ([]byte, error) {
			data, err := json.Marshal(h.sess.Core.Agent().Reactions())
			if err != nil {
				return nil, err
			}
			return append(data, '\n'), nil
		}
	case "chat":
		fs.Read = func() ([]byte, error) {
			h.sess.mu.RLock()
			data := make([]byte, len(h.sess.log))
			copy(data, h.sess.log)
			h.sess.mu.RUnlock()
			return data, nil
		}
		fs.Size = func() int64 {
			h.sess.mu.RLock()
			n := len(h.sess.log)
			h.sess.mu.RUnlock()
			return int64(n)
		}
	case "fifo.out":
		fs.Read = func() ([]byte, error) {
			item, ok := h.sess.Core.Agent().PopQueue()
			if !ok {
				return nil, nil
			}
			return []byte(item), nil
		}
	case "cfg":
		fs.Read = func() ([]byte, error) { return []byte(h.cfgContent()), nil }
	default:
		fs.Read = func() ([]byte, error) { return []byte(h.content(name)), nil }
	}

	// Write
	switch name {
	case "plan":
		fs.Write = func(data []byte) error {
			h.sess.mu.Lock()
			h.sess.plan = make([]byte, len(data))
			copy(h.sess.plan, data)
			h.sess.mu.Unlock()
			return nil
		}
	case "chat":
		fs.Write = func(data []byte) error {
			input := strings.TrimSpace(string(data))
			if input == "" {
				return nil
			}
			return h.saveTranscript([]byte(input))
		}
	case "prompt":
		fs.Write = func(data []byte) error {
			input := strings.TrimSpace(string(data))
			if input == "" {
				return nil
			}
			// Handle /invalidate locally before passing to core
			if input == "/invalidate" {
				if h.invalidateModels != nil {
					h.invalidateModels()
				}
				h.sess.InvalidateModelsCache()
				return nil
			}
			h.sess.mu.Lock()
			h.sess.prevPrompt = []byte(input)
			h.sess.mu.Unlock()
			go func() {
				h.sess.Core.Agent().Submit(h.sess.SessionCtx, input)
				h.sess.EnsureTrailingNewline()
			}()
			return nil
		}
	case "fifo.in":
		fs.Write = func(data []byte) error {
			input := strings.TrimSpace(string(data))
			if input == "" {
				return nil
			}
			h.sess.Core.Agent().Queue(input)
			return nil
		}
	case "ctl":
		fs.Write = func(data []byte) error {
			input := strings.TrimSpace(string(data))
			if input == "" {
				return nil
			}
			return h.handleCtl(input)
		}
	case "cfg":
		fs.Write = func(data []byte) error {
			input := strings.TrimSpace(string(data))
			if input == "" {
				return nil
			}
			return h.handleCfg(input)
		}
	case "tools":
		fs.Write = func(data []byte) error {
			input := strings.TrimSpace(string(data))
			if input == "" {
				return nil
			}
			if h.toolRegistry == nil {
				return fmt.Errorf("registry not available")
			}
			return h.toolRegistry.Load(h.sess.id, input)
		}
	case "react":
		fs.Write = func(data []byte) error {
			input := strings.TrimSpace(string(data))
			if input == "" {
				return nil
			}
			var req struct {
				ResponseID string `json:"responseId"`
				Emoji      string `json:"emoji"`
			}
			if strings.HasPrefix(input, "{") {
				if err := json.Unmarshal(data, &req); err != nil {
					return fmt.Errorf("react: invalid JSON: %w", err)
				}
			} else {
				req.Emoji = input
			}
			if req.Emoji == "" {
				return fmt.Errorf("react: emoji is required")
			}
			return h.sess.Core.Agent().React(req.ResponseID, req.Emoji)
		}
	}

	// Wait
	if name == "statewait" {
		fs.Wait = func(connCtx context.Context, base string) ([]byte, string, error) {
			ctx, cancel := context.WithCancel(connCtx)
			defer cancel()
			context.AfterFunc(h.sess.SessionCtx, cancel)
			if base == "" {
				base = h.sess.Core.Agent().State()
			}
			v, ok := h.sess.Core.WaitChange(ctx, agent.WatchState, base)
			if !ok {
				s := h.sess.Core.Agent().State()
				return []byte(s + "\n"), s, nil
			}
			return []byte(v + "\n"), v, nil
		}
	}

	return fs
}

func (h *sessionHelper) content(name string) string {
	h.sess.mu.RLock()
	defer h.sess.mu.RUnlock()
	switch name {
	case "usage":
		return h.sess.Core.Agent().UsageStr() + "\n"
	case "cost":
		return h.sess.Core.Agent().CostStr()
	case "ctxsz":
		return h.sess.Core.Agent().CtxSz() + "\n"
	case "models":
		h.log.Debug("content(models) called")
		return h.sess.CachedListModels() + "\n"
	case "systemprompt":
		return h.sess.Core.Agent().SystemPrompt()
	case "state":
		return h.sess.Core.Agent().State() + "\n"
	case "offset":
		return fmt.Sprintf("%d\n", h.sess.ChatOffset)
	case "env":
		return h.envContent()
	case "tail":
		return "#!/bin/sh\nexec tail -f \"$(dirname \"$0\")/chat\"\n"
	case "context":
		var sb strings.Builder
		enc := json.NewEncoder(&sb)
		enc.SetEscapeHTML(false)
		for _, m := range h.sess.Core.Agent().Context() {
			enc.Encode(m)
		}
		return sb.String()
	case "toolsrv.loaded":
		if h.toolRegistry == nil {
			return "registry not available\n"
		}
		loaded := h.toolRegistry.Loaded(h.sess.id)
		if len(loaded) == 0 {
			return "(no tools loaded)\n"
		}
		var sb strings.Builder
		for _, ti := range loaded {
			if ti.Description != "" {
				fmt.Fprintf(&sb, "%-20s %s\n", ti.Name, ti.Description)
			} else {
				sb.WriteString(ti.Name + "\n")
			}
		}
		return sb.String()
	case "toolsrv.rev":
		if h.toolRegistry == nil {
			return "0\n"
		}
		return fmt.Sprintf("%d\n", h.toolRegistry.Revision(h.sess.id))
	case "tools":
		if h.toolRegistry == nil {
			return "registry not available\n"
		}
		var sb strings.Builder
		for _, ti := range h.toolRegistry.Summaries() {
			if ti.Description != "" {
				fmt.Fprintf(&sb, "%-20s %s\n", ti.Name, ti.Description)
			} else {
				sb.WriteString(ti.Name + "\n")
			}
		}
		return sb.String()
	}
	return ""
}

func (h *sessionHelper) envContent() string {
	var sb strings.Builder
	fmt.Fprintf(&sb, "OLLIE_SESSION_ID=%s\n", h.sess.RunnableID())
	for _, e := range os.Environ() {
		if strings.HasPrefix(e, "OLLIE_") && !strings.HasPrefix(e, "OLLIE_SESSION_ID=") {
			sb.WriteString(e)
			sb.WriteByte('\n')
		}
	}
	return sb.String()
}

func (h *sessionHelper) cfgContent() string {
	h.sess.mu.RLock()
	defer h.sess.mu.RUnlock()
	p := h.sess.Core.Agent().GenParams()
	var sb strings.Builder
	fmt.Fprintf(&sb, "name=%s\n", h.sess.id)
	fmt.Fprintf(&sb, "backend=%s\n", h.sess.Core.Agent().BackendName())
	fmt.Fprintf(&sb, "model=%s\n", h.sess.Core.Agent().ModelName())
	fmt.Fprintf(&sb, "agent=%s\n", h.sess.Core.Agent().Name())
	fmt.Fprintf(&sb, "cwd=%s\n", h.sess.Core.CWD())
	fmt.Fprintf(&sb, "remote=%s\n", h.sess.remote)
	fmt.Fprintf(&sb, "maxTokens=%d\n", p.MaxTokens)
	fmt.Fprintf(&sb, "maxCompletionTokens=%d\n", p.MaxCompletionTokens)
	if p.Temperature != nil {
		fmt.Fprintf(&sb, "temperature=%g\n", *p.Temperature)
	} else {
		sb.WriteString("temperature=\n")
	}
	if p.TopP != nil {
		fmt.Fprintf(&sb, "topP=%g\n", *p.TopP)
	} else {
		sb.WriteString("topP=\n")
	}
	if p.TopK != nil {
		fmt.Fprintf(&sb, "topK=%d\n", *p.TopK)
	} else {
		sb.WriteString("topK=\n")
	}
	if p.MinP != nil {
		fmt.Fprintf(&sb, "minP=%g\n", *p.MinP)
	} else {
		sb.WriteString("minP=\n")
	}
	if p.TopA != nil {
		fmt.Fprintf(&sb, "topA=%g\n", *p.TopA)
	} else {
		sb.WriteString("topA=\n")
	}
	if p.FrequencyPenalty != nil {
		fmt.Fprintf(&sb, "frequencyPenalty=%g\n", *p.FrequencyPenalty)
	} else {
		sb.WriteString("frequencyPenalty=\n")
	}
	if p.PresencePenalty != nil {
		fmt.Fprintf(&sb, "presencePenalty=%g\n", *p.PresencePenalty)
	} else {
		sb.WriteString("presencePenalty=\n")
	}
	if p.RepetitionPenalty != nil {
		fmt.Fprintf(&sb, "repetitionPenalty=%g\n", *p.RepetitionPenalty)
	} else {
		sb.WriteString("repetitionPenalty=\n")
	}
	fmt.Fprintf(&sb, "reasoning=%d\n", p.ThinkingBudget)
	if p.ReasoningEffort != "" {
		fmt.Fprintf(&sb, "reasoningEffort=%s\n", p.ReasoningEffort)
	} else {
		sb.WriteString("reasoningEffort=\n")
	}
	if p.IncludeReasoning != nil {
		fmt.Fprintf(&sb, "includeReasoning=%t\n", *p.IncludeReasoning)
	} else {
		sb.WriteString("includeReasoning=\n")
	}
	if p.ResponseFormat != "" {
		fmt.Fprintf(&sb, "responseFormat=%s\n", p.ResponseFormat)
	} else {
		sb.WriteString("responseFormat=\n")
	}
	if len(p.Stop) > 0 {
		fmt.Fprintf(&sb, "stop=%s\n", strings.Join(p.Stop, ","))
	} else {
		sb.WriteString("stop=\n")
	}
	if p.Verbosity != "" {
		fmt.Fprintf(&sb, "verbosity=%s\n", p.Verbosity)
	} else {
		sb.WriteString("verbosity=\n")
	}
	fmt.Fprintf(&sb, "compactionModel=%s\n", h.sess.Core.Agent().CompactionModel())
	return sb.String()
}

func (h *sessionHelper) handleCfg(input string) error {
	p := h.sess.Core.Agent().GenParams()
	hasParams := false
	var deferredBackend, deferredModel string
	for _, line := range strings.Split(input, "\n") {
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}
		k, v, ok := strings.Cut(line, "=")
		if !ok {
			continue
		}
		k, v = strings.TrimSpace(k), strings.TrimSpace(v)
		switch k {
		case "name":
			if v == "" {
				continue
			}
			if h.sess.Core.Agent().IsRunning() {
				return fmt.Errorf("cannot rename while agent is running")
			}
			if err := h.rename(v); err != nil {
				return err
			}
		case "agent":
			if v == "" {
				continue
			}
			if h.sess.Core.Agent().IsRunning() {
				return fmt.Errorf("cannot switch %s while agent is running", k)
			}
			h.sess.Core.Agent().Submit(h.sess.SessionCtx, "/agent "+v)
		case "backend", "model":
			if v == "" {
				continue
			}
			if h.sess.Core.Agent().IsRunning() {
				return fmt.Errorf("cannot switch %s while agent is running", k)
			}
			// Defer backend/model until after the loop so they override
			// any values set by agent=.
			if k == "backend" {
				deferredBackend = v
			} else {
				deferredModel = v
			}
		case "cwd":
			if v == "" {
				continue
			}
			if err := h.sess.Core.SetCWD(v); err != nil {
				return err
			}
		case "maxTokens":
			hasParams = true
			if v == "" {
				p.MaxTokens = 0
			} else if n, err := strconv.Atoi(v); err == nil {
				p.MaxTokens = n
			}
		case "maxCompletionTokens":
			hasParams = true
			if v == "" {
				p.MaxCompletionTokens = 0
			} else if n, err := strconv.Atoi(v); err == nil {
				p.MaxCompletionTokens = n
			}
		case "temperature":
			hasParams = true
			if v == "" {
				p.Temperature = nil
			} else if f, err := strconv.ParseFloat(v, 64); err == nil {
				p.Temperature = &f
			}
		case "topP":
			hasParams = true
			if v == "" {
				p.TopP = nil
			} else if f, err := strconv.ParseFloat(v, 64); err == nil {
				p.TopP = &f
			}
		case "topK":
			hasParams = true
			if v == "" {
				p.TopK = nil
			} else if n, err := strconv.Atoi(v); err == nil {
				p.TopK = &n
			}
		case "minP":
			hasParams = true
			if v == "" {
				p.MinP = nil
			} else if f, err := strconv.ParseFloat(v, 64); err == nil {
				p.MinP = &f
			}
		case "topA":
			hasParams = true
			if v == "" {
				p.TopA = nil
			} else if f, err := strconv.ParseFloat(v, 64); err == nil {
				p.TopA = &f
			}
		case "frequencyPenalty":
			hasParams = true
			if v == "" {
				p.FrequencyPenalty = nil
			} else if f, err := strconv.ParseFloat(v, 64); err == nil {
				p.FrequencyPenalty = &f
			}
		case "presencePenalty":
			hasParams = true
			if v == "" {
				p.PresencePenalty = nil
			} else if f, err := strconv.ParseFloat(v, 64); err == nil {
				p.PresencePenalty = &f
			}
		case "repetitionPenalty":
			hasParams = true
			if v == "" {
				p.RepetitionPenalty = nil
			} else if f, err := strconv.ParseFloat(v, 64); err == nil {
				p.RepetitionPenalty = &f
			}
		case "reasoning":
			hasParams = true
			if v == "" {
				p.ThinkingBudget = 0
			} else if n, err := strconv.Atoi(v); err == nil {
				p.ThinkingBudget = n
			}
		case "reasoningEffort":
			hasParams = true
			p.ReasoningEffort = v
		case "includeReasoning":
			hasParams = true
			if v == "" {
				p.IncludeReasoning = nil
			} else {
				b := v == "true"
				p.IncludeReasoning = &b
			}
		case "responseFormat":
			hasParams = true
			p.ResponseFormat = v
		case "stop":
			hasParams = true
			if v == "" {
				p.Stop = nil
			} else {
				p.Stop = strings.Split(v, ",")
			}
		case "verbosity":
			hasParams = true
			p.Verbosity = v
		case "compactionModel":
			h.sess.Core.Agent().SetCompactionModel(v)
			// state → read-only, silently ignored
		}
	}
	// Apply backend/model after agent= so manual overrides win.
	if deferredBackend != "" {
		h.sess.Core.Agent().Submit(h.sess.SessionCtx, "/backend "+deferredBackend)
	}
	if deferredModel != "" {
		h.sess.Core.Agent().Submit(h.sess.SessionCtx, "/model "+deferredModel)
	}
	if hasParams {
		if h.sess.Core.Agent().IsRunning() {
			return fmt.Errorf("cannot change params while agent is running")
		}
		h.sess.Core.Agent().SetGenParams(p)
	}
	return nil
}

func (h *sessionHelper) handleCtl(input string) error {
	cmd := strings.Fields(input)
	if len(cmd) == 0 {
		return fmt.Errorf("empty ctl command")
	}
	switch cmd[0] {
	case "stop":
		h.sess.Core.Agent().Interrupt(agent.ErrInterrupted)
	case "kill":
		h.kill()
	case "rn":
		if name := strings.TrimSpace(input[3:]); name != "" {
			if err := h.rename(name); err != nil {
				h.log.Error("rename: %v", err)
			}
		}
	case "save":
		h.sess.mu.RLock()
		data := make([]byte, len(h.sess.log))
		copy(data, h.sess.log)
		h.sess.mu.RUnlock()
		return h.saveTranscript(data)
	case "detach":
		if !h.sess.Core.Agent().Detach() {
			return fmt.Errorf("no running process to detach")
		}
	case "signal":
		if len(cmd) < 2 {
			return fmt.Errorf("usage: signal <pid> [TERM|KILL]")
		}
		pid, err := strconv.Atoi(cmd[1])
		if err != nil {
			return fmt.Errorf("invalid pid: %s", cmd[1])
		}
		sig := 15 // SIGTERM default
		if len(cmd) >= 3 && strings.ToUpper(cmd[2]) == "KILL" {
			sig = 9
		}
		if err := h.sess.Core.Agent().SignalDetached(pid, sig); err != nil {
			return err
		}
	case "invalidate":
		if h.invalidateModels != nil {
			h.invalidateModels()
		}
		h.sess.InvalidateModelsCache()
	case "compact", "clear", "backend", "model", "models",
		"agents", "agent", "sessions", "cwd", "skills",
		"tools", "context", "usage", "cost", "history",
		"irw", "help":
		h.sess.Core.Agent().Submit(h.sess.SessionCtx, "/"+input)
	default:
		return fmt.Errorf("unknown ctl command: %s", cmd[0])
	}
	return nil
}

// FormatParams formats generation parameters as key=value lines.
func FormatParams(p backend.GenerationParams) string {
	var sb strings.Builder
	fmt.Fprintf(&sb, "maxTokens=%d\n", p.MaxTokens)
	fmt.Fprintf(&sb, "maxCompletionTokens=%d\n", p.MaxCompletionTokens)
	if p.Temperature != nil {
		fmt.Fprintf(&sb, "temperature=%g\n", *p.Temperature)
	} else {
		fmt.Fprintf(&sb, "temperature=\n")
	}
	if p.TopP != nil {
		fmt.Fprintf(&sb, "topP=%g\n", *p.TopP)
	} else {
		fmt.Fprintf(&sb, "topP=\n")
	}
	if p.TopK != nil {
		fmt.Fprintf(&sb, "topK=%d\n", *p.TopK)
	} else {
		fmt.Fprintf(&sb, "topK=\n")
	}
	if p.MinP != nil {
		fmt.Fprintf(&sb, "minP=%g\n", *p.MinP)
	} else {
		fmt.Fprintf(&sb, "minP=\n")
	}
	if p.TopA != nil {
		fmt.Fprintf(&sb, "topA=%g\n", *p.TopA)
	} else {
		fmt.Fprintf(&sb, "topA=\n")
	}
	if p.FrequencyPenalty != nil {
		fmt.Fprintf(&sb, "frequencyPenalty=%g\n", *p.FrequencyPenalty)
	} else {
		fmt.Fprintf(&sb, "frequencyPenalty=\n")
	}
	if p.PresencePenalty != nil {
		fmt.Fprintf(&sb, "presencePenalty=%g\n", *p.PresencePenalty)
	} else {
		fmt.Fprintf(&sb, "presencePenalty=\n")
	}
	if p.RepetitionPenalty != nil {
		fmt.Fprintf(&sb, "repetitionPenalty=%g\n", *p.RepetitionPenalty)
	} else {
		fmt.Fprintf(&sb, "repetitionPenalty=\n")
	}
	fmt.Fprintf(&sb, "reasoning=%d\n", p.ThinkingBudget)
	if p.ReasoningEffort != "" {
		fmt.Fprintf(&sb, "reasoningEffort=%s\n", p.ReasoningEffort)
	} else {
		fmt.Fprintf(&sb, "reasoningEffort=\n")
	}
	if p.IncludeReasoning != nil {
		fmt.Fprintf(&sb, "includeReasoning=%t\n", *p.IncludeReasoning)
	} else {
		fmt.Fprintf(&sb, "includeReasoning=\n")
	}
	if p.ResponseFormat != "" {
		fmt.Fprintf(&sb, "responseFormat=%s\n", p.ResponseFormat)
	} else {
		fmt.Fprintf(&sb, "responseFormat=\n")
	}
	if len(p.Stop) > 0 {
		fmt.Fprintf(&sb, "stop=%s\n", strings.Join(p.Stop, ","))
	} else {
		fmt.Fprintf(&sb, "stop=\n")
	}
	if p.Verbosity != "" {
		fmt.Fprintf(&sb, "verbosity=%s\n", p.Verbosity)
	} else {
		fmt.Fprintf(&sb, "verbosity=\n")
	}
	return sb.String()
}

// ParseParams parses key=value lines into generation parameters.
func ParseParams(input string, current backend.GenerationParams) (backend.GenerationParams, error) {
	p := current
	for _, line := range strings.Split(input, "\n") {
		k, v, ok := strings.Cut(line, "=")
		if !ok {
			continue
		}
		k = strings.TrimSpace(k)
		v = strings.TrimSpace(v)
		switch k {
		case "maxTokens":
			if v == "" {
				p.MaxTokens = 0
			} else {
				n, err := strconv.Atoi(v)
				if err != nil {
					return p, fmt.Errorf("invalid maxTokens: %s", v)
				}
				p.MaxTokens = n
			}
		case "maxCompletionTokens":
			if v == "" {
				p.MaxCompletionTokens = 0
			} else {
				n, err := strconv.Atoi(v)
				if err != nil {
					return p, fmt.Errorf("invalid maxCompletionTokens: %s", v)
				}
				p.MaxCompletionTokens = n
			}
		case "temperature":
			if v == "" {
				p.Temperature = nil
			} else {
				f, err := strconv.ParseFloat(v, 64)
				if err != nil {
					return p, fmt.Errorf("invalid temperature: %s", v)
				}
				p.Temperature = &f
			}
		case "topP":
			if v == "" {
				p.TopP = nil
			} else {
				f, err := strconv.ParseFloat(v, 64)
				if err != nil {
					return p, fmt.Errorf("invalid topP: %s", v)
				}
				p.TopP = &f
			}
		case "topK":
			if v == "" {
				p.TopK = nil
			} else {
				n, err := strconv.Atoi(v)
				if err != nil {
					return p, fmt.Errorf("invalid topK: %s", v)
				}
				p.TopK = &n
			}
		case "minP":
			if v == "" {
				p.MinP = nil
			} else {
				f, err := strconv.ParseFloat(v, 64)
				if err != nil {
					return p, fmt.Errorf("invalid minP: %s", v)
				}
				p.MinP = &f
			}
		case "topA":
			if v == "" {
				p.TopA = nil
			} else {
				f, err := strconv.ParseFloat(v, 64)
				if err != nil {
					return p, fmt.Errorf("invalid topA: %s", v)
				}
				p.TopA = &f
			}
		case "frequencyPenalty":
			if v == "" {
				p.FrequencyPenalty = nil
			} else {
				f, err := strconv.ParseFloat(v, 64)
				if err != nil {
					return p, fmt.Errorf("invalid frequencyPenalty: %s", v)
				}
				p.FrequencyPenalty = &f
			}
		case "presencePenalty":
			if v == "" {
				p.PresencePenalty = nil
			} else {
				f, err := strconv.ParseFloat(v, 64)
				if err != nil {
					return p, fmt.Errorf("invalid presencePenalty: %s", v)
				}
				p.PresencePenalty = &f
			}
		case "repetitionPenalty":
			if v == "" {
				p.RepetitionPenalty = nil
			} else {
				f, err := strconv.ParseFloat(v, 64)
				if err != nil {
					return p, fmt.Errorf("invalid repetitionPenalty: %s", v)
				}
				p.RepetitionPenalty = &f
			}
		case "reasoning":
			if v == "" {
				p.ThinkingBudget = 0
			} else {
				n, err := strconv.Atoi(v)
				if err != nil {
					return p, fmt.Errorf("invalid reasoning: %s", v)
				}
				p.ThinkingBudget = n
			}
		case "reasoningEffort":
			p.ReasoningEffort = v
		case "includeReasoning":
			if v == "" {
				p.IncludeReasoning = nil
			} else {
				b := v == "true"
				p.IncludeReasoning = &b
			}
		case "responseFormat":
			p.ResponseFormat = v
		case "stop":
			if v == "" {
				p.Stop = nil
			} else {
				p.Stop = strings.Split(v, ",")
			}
		case "verbosity":
			p.Verbosity = v
		}
	}
	return p, nil
}