// Package config loads the two YAML profiles documented in
// configs/{model,review}-profile.example.yaml. Both are optional —
// callers that don't pass --review-profile or --model-profile get
// DefaultReviewProfile / DefaultModelProfile.
//
// Defaults reflect the 2026-04-30 small-model-pipeline tier bump:
// local model is qwen3.5:latest, not qwen2.5-coder. The example
// YAML in configs/ still says qwen2.5-coder per PROMPT.md as
// originally authored — operators who copy the example get that;
// operators who skip the file get the current default.
package config

import (
	"fmt"
	"os"

	"gopkg.in/yaml.v3"
)

// ModelProfile mirrors configs/model-profile.example.yaml.
type ModelProfile struct {
	Provider       string  `yaml:"provider"`
	BaseURL        string  `yaml:"base_url"`
	Model          string  `yaml:"model"`
	FallbackModel  string  `yaml:"fallback_model"`
	TimeoutSeconds int     `yaml:"timeout_seconds"`
	Temperature    float64 `yaml:"temperature"`
}

// ReviewProfile mirrors configs/review-profile.example.yaml.
// Toggles disable analyzers without code changes — review-profile
// drives noisy-check tuning per repo.
type ReviewProfile struct {
	ProjectName string `yaml:"project_name"`
	Mode        string `yaml:"mode"`

	SeverityThresholds struct {
		FailOnCritical bool `yaml:"fail_on_critical"`
		FailOnHigh     bool `yaml:"fail_on_high"`
	} `yaml:"severity_thresholds"`

	StaticChecks struct {
		HardcodedPaths     bool `yaml:"hardcoded_paths"`
		RawSQLInterpolation bool `yaml:"raw_sql_interpolation"`
		ShellExecution     bool `yaml:"shell_execution"`
		BroadCORS          bool `yaml:"broad_cors"`
		SecretPatterns     bool `yaml:"secret_patterns"`
		LargeFiles         bool `yaml:"large_files"`
		TODOComments       bool `yaml:"todo_comments"`
		MissingTests       bool `yaml:"missing_tests"`
	} `yaml:"static_checks"`

	Limits struct {
		LargeFileLines    int `yaml:"large_file_lines"`
		MaxFileBytes      int `yaml:"max_file_bytes"`
		MaxLLMChunkChars  int `yaml:"max_llm_chunk_chars"`
	} `yaml:"limits"`

	Reports struct {
		OutputDir    string `yaml:"output_dir"`
		Markdown     bool   `yaml:"markdown"`
		JSONReceipts bool   `yaml:"json_receipts"`
	} `yaml:"reports"`

	Memory struct {
		Enabled    bool   `yaml:"enabled"`
		Path       string `yaml:"path"`
		AppendOnly bool   `yaml:"append_only"`
	} `yaml:"memory"`
}

// DefaultModelProfile reflects the current Lakehouse-Go local-tier
// default (qwen3.5:latest), not the qwen2.5-coder example file.
// PROMPT.md was authored 2026-04-29; tier bump landed 2026-04-30.
func DefaultModelProfile() ModelProfile {
	return ModelProfile{
		Provider:       "ollama",
		BaseURL:        "http://localhost:11434",
		Model:          "qwen3.5:latest",
		FallbackModel:  "qwen3:latest",
		TimeoutSeconds: 120,
		Temperature:    0.1,
	}
}

// DefaultReviewProfile turns every static check ON by default.
// review-profile.yaml in the target repo is how operators tune.
func DefaultReviewProfile() ReviewProfile {
	p := ReviewProfile{
		ProjectName: "review-harness",
		Mode:        "local-first",
	}
	p.SeverityThresholds.FailOnCritical = true
	p.SeverityThresholds.FailOnHigh = false
	p.StaticChecks.HardcodedPaths = true
	p.StaticChecks.RawSQLInterpolation = true
	p.StaticChecks.ShellExecution = true
	p.StaticChecks.BroadCORS = true
	p.StaticChecks.SecretPatterns = true
	p.StaticChecks.LargeFiles = true
	p.StaticChecks.TODOComments = true
	p.StaticChecks.MissingTests = true
	p.Limits.LargeFileLines = 800
	p.Limits.MaxFileBytes = 1_000_000
	p.Limits.MaxLLMChunkChars = 12000
	p.Reports.OutputDir = "reports/latest"
	p.Reports.Markdown = true
	p.Reports.JSONReceipts = true
	p.Memory.Enabled = true
	p.Memory.Path = ".memory"
	p.Memory.AppendOnly = true
	return p
}

// LoadModelProfile reads YAML from path. Empty path returns defaults
// without error — operators don't need a profile to run.
func LoadModelProfile(path string) (ModelProfile, error) {
	out := DefaultModelProfile()
	if path == "" {
		return out, nil
	}
	b, err := os.ReadFile(path)
	if err != nil {
		return out, fmt.Errorf("read model profile %s: %w", path, err)
	}
	if err := yaml.Unmarshal(b, &out); err != nil {
		return out, fmt.Errorf("parse model profile %s: %w", path, err)
	}
	return out, nil
}

// LoadReviewProfile reads YAML from path. Empty path returns defaults.
// Partial files merge into defaults — unspecified fields stay at
// default values (yaml.v3 preserves pre-existing values for fields
// not present in the YAML).
func LoadReviewProfile(path string) (ReviewProfile, error) {
	out := DefaultReviewProfile()
	if path == "" {
		return out, nil
	}
	b, err := os.ReadFile(path)
	if err != nil {
		return out, fmt.Errorf("read review profile %s: %w", path, err)
	}
	if err := yaml.Unmarshal(b, &out); err != nil {
		return out, fmt.Errorf("parse review profile %s: %w", path, err)
	}
	return out, nil
}