package models

import (
	"encoding/json"
	"fmt"
	"html/template"
	"os"
	"strings"
	"time"

	c "github.com/juanatsap/cv-site/internal/constants"
)

// CV represents the complete curriculum vitae structure
type CV struct {
	Personal       Personal        `json:"personal"`
	Summary        string          `json:"summary"`
	Experience     []Experience    `json:"experience"`
	Education      []Education     `json:"education"`
	Skills         Skills          `json:"skills"`
	Languages      []Language      `json:"languages"`
	Projects       []Project       `json:"projects"`
	Awards         []Award         `json:"awards"`
	Certifications []Certification `json:"certifications"`
	Courses        []Course        `json:"courses"`
	References     []Reference     `json:"references"`
	Other          Other           `json:"other"`
	Meta           Meta            `json:"meta"`
}

type Personal struct {
	Name         string `json:"name"`
	Title        string `json:"title"`
	Location     string `json:"location"`
	Email        string `json:"email"`
	Phone        string `json:"phone"`
	DateOfBirth  string `json:"dateOfBirth"`
	PlaceOfBirth string `json:"placeOfBirth"`
	Citizenship  string `json:"citizenship"`
	LinkedIn     string `json:"linkedin"`
	GitHub       string `json:"github"`
	Domestika    string `json:"domestika"`
	Website      string `json:"website"`
	Photo        string `json:"photo"`
}

type Experience struct {
	Position         string   `json:"position"`
	Company          string   `json:"company"`
	CompanyID        string   `json:"companyID,omitempty"` // Unique ID for scrolling/navigation
	CompanyURL       string   `json:"companyURL,omitempty"` // Optional URL for company website
	CompanyLogo      string   `json:"companyLogo"`
	LogoIndex        *int     `json:"logoIndex,omitempty"` // Sprite sheet index (nil means no sprite)
	Location         string   `json:"location"`
	StartDate        string   `json:"startDate"`
	EndDate          string   `json:"endDate"`
	Current          bool     `json:"current"`
	Expired          bool     `json:"expired,omitempty"` // Optional flag for expired companies
	ShortDescription string   `json:"shortDescription"`
	Responsibilities []string `json:"responsibilities"`
	Technologies     []string `json:"technologies"`
	Highlights       []string `json:"highlights"`
	Duration         string   `json:"-"` // Calculated field, not from JSON
}

type Education struct {
	Degree      string `json:"degree"`
	Institution string `json:"institution"`
	Location    string `json:"location"`
	StartDate   string `json:"startDate"`
	EndDate     string `json:"endDate"`
	Field       string `json:"field"`
}

type Skills struct {
	Technical  []SkillCategory `json:"technical"`
	SoftSkills []string        `json:"soft_skills"`
}

type SkillCategory struct {
	Category    string   `json:"category"`
	Proficiency int      `json:"proficiency"`
	Items       []string `json:"items"`
	Sidebar     string   `json:"sidebar"` // "left" or "right"
}

type Language struct {
	Language    string `json:"language"`
	Proficiency string `json:"proficiency"`
	Level       int    `json:"level"`
	Detail      string `json:"detail,omitempty"` // Optional detail like "Oral (Medio/Alto) Escrito (Alto)"
}

type Project struct {
	Title            string   `json:"title"`
	Category         string   `json:"category,omitempty"`         // Project type: cli, app, web, webapp, plugin, sdk, contrib
	ProjectName      string   `json:"projectName,omitempty"`      // Optional: linkable part of title
	ProjectDesc      string   `json:"projectDesc,omitempty"`      // Optional: non-linkable description part
	ProjectID        string   `json:"projectID,omitempty"`        // Unique ID for scrolling/navigation
	URL              string   `json:"url"`
	ProjectLogo      string   `json:"projectLogo,omitempty"`      // Optional logo filename
	LogoIndex        *int     `json:"logoIndex,omitempty"`        // Sprite sheet index (nil means no sprite)
	GitRepoUrl       string   `json:"gitRepoUrl,omitempty"`       // Optional git repository URL for dynamic dates
	OpenSource       bool     `json:"openSource,omitempty"`       // True if project is open source (shows stars badge)
	Location         string   `json:"location"`
	StartDate        string   `json:"startDate,omitempty"`        // Optional static start date
	Current          bool     `json:"current"`
	MaintainedBy     string   `json:"maintainedBy,omitempty"`     // Optional maintainer name (e.g., "SAP")
	Technologies     []string `json:"technologies"`
	ShortDescription string   `json:"shortDescription"`
	Responsibilities []string `json:"responsibilities"`

	// Computed fields (not stored in JSON)
	ComputedStartDate string `json:"-"` // Dynamically calculated from git repo or system
	DynamicDate       string `json:"-"` // Current date for ongoing projects
	Stars             int    `json:"-"` // GitHub star count (fetched at runtime)
}

type Award struct {
	Title            string   `json:"title"`
	Issuer           string   `json:"issuer"`
	Date             string   `json:"date"`
	Description      string   `json:"description"`
	ShortDescription string   `json:"shortDescription,omitempty"`
	Responsibilities []string `json:"responsibilities,omitempty"`
	AwardLogo        string   `json:"awardLogo"`
}

type Certification struct {
	Name        string `json:"name"`
	Issuer      string `json:"issuer"`
	Date        string `json:"date"`
	Description string `json:"description"`
}

type Course struct {
	Title            string   `json:"title"`
	Institution      string   `json:"institution"`
	CourseID         string   `json:"courseID,omitempty"` // Unique ID for scrolling/navigation
	CourseLogo       string   `json:"courseLogo,omitempty"` // Optional logo filename
	LogoIndex        *int     `json:"logoIndex,omitempty"`  // Sprite sheet index (nil means no sprite)
	Location         string   `json:"location"`
	Date             string   `json:"date"`
	Duration         string   `json:"duration"`
	Description      string   `json:"description"`
	ShortDescription string   `json:"shortDescription,omitempty"`
	Responsibilities []string `json:"responsibilities,omitempty"`
}

type Reference struct {
	Title      string `json:"title"`
	URL        string `json:"url"`
	Type       string `json:"type"`                 // "recommendation", "portfolio", "profile", "cv", "presentation"
	Action     string `json:"action,omitempty"`     // Optional action like "downloadPDF"
	TextBefore string `json:"textBefore,omitempty"` // Text before the link
	LinkText   string `json:"linkText,omitempty"`   // Bold text inside the link
	TextAfter  string `json:"textAfter,omitempty"`  // Text after the link
}

type Other struct {
	DriverLicense string `json:"driverLicense"`
}

type Meta struct {
	Version     string `json:"version"`
	LastUpdated string `json:"lastUpdated"`
	Format      string `json:"format"`
	Language    string `json:"language"`
}

type UI struct {
	InfoModal      InfoModal      `json:"infoModal"`
	ShortcutsModal ShortcutsModal `json:"shortcutsModal"`
}

type InfoModal struct {
	Title             string        `json:"title"`
	Description       template.HTML `json:"description"`
	TechStack         TechStack     `json:"techStack"`
	ViewSource        string        `json:"viewSource"`
	ViewSourceSubtext string        `json:"viewSourceSubtext"`
}

type TechStack struct {
	GoHono string `json:"goHono"`
	HTMX   string `json:"htmx"`
	HTML5  string `json:"html5"`
	CSS3   string `json:"css3"`
}

type ShortcutsModal struct {
	Title       string             `json:"title"`
	Description string             `json:"description"`
	Sections    ShortcutsSections  `json:"sections"`
}

type ShortcutsSections struct {
	Zoom         ShortcutGroup `json:"zoom"`
	ViewControls ShortcutGroup `json:"viewControls"`
	Navigation   ShortcutGroup `json:"navigation"`
	Actions      ShortcutGroup `json:"actions"`
	Browser      ShortcutGroup `json:"browser"`
}

type ShortcutGroup struct {
	Title        string        `json:"title"`
	ZoomIn       *ShortcutItem `json:"zoomIn,omitempty"`
	ZoomOut      *ShortcutItem `json:"zoomOut,omitempty"`
	ZoomReset    *ShortcutItem `json:"zoomReset,omitempty"`
	ToggleLength *ShortcutItem `json:"toggleLength,omitempty"`
	ToggleIcons  *ShortcutItem `json:"toggleIcons,omitempty"`
	ToggleTheme  *ShortcutItem `json:"toggleTheme,omitempty"`
	ExpandAll    *ShortcutItem `json:"expandAll,omitempty"`
	CollapseAll  *ShortcutItem `json:"collapseAll,omitempty"`
	ScrollToTop  *ShortcutItem `json:"scrollToTop,omitempty"`
	Print        *ShortcutItem `json:"print,omitempty"`
	CloseModal   *ShortcutItem `json:"closeModal,omitempty"`
	ShowHelp     *ShortcutItem `json:"showHelp,omitempty"`
	Tab          *ShortcutItem `json:"tab,omitempty"`
	Enter        *ShortcutItem `json:"enter,omitempty"`
}

type ShortcutItem struct {
	Key         string `json:"key"`
	Description string `json:"description"`
}

// findDataFile locates a data file by searching up the directory tree
func findDataFile(filename string) (string, error) {
	// Try current directory first
	if _, err := os.Stat(filename); err == nil {
		return filename, nil
	}

	// Try parent directories (for tests running from subdirectories)
	paths := []string{
		filename,                   // Current dir
		"../" + filename,          // One level up
		"../../" + filename,       // Two levels up (for tests in internal/handlers)
		"../../../" + filename,    // Three levels up
	}

	for _, path := range paths {
		if _, err := os.Stat(path); err == nil {
			return path, nil
		}
	}

	return "", fmt.Errorf("file not found: %s (searched: current dir, ../, ../../, ../../../)", filename)
}

// LoadCV loads CV data from a JSON file for the specified language
func LoadCV(lang string) (*CV, error) {
	if lang != "en" && lang != "es" {
		return nil, fmt.Errorf("unsupported language: %s", lang)
	}

	filename := fmt.Sprintf("%s/cv-%s.json", c.DirData, lang)
	filepath, err := findDataFile(filename)
	if err != nil {
		return nil, err
	}

	data, err := os.ReadFile(filepath)
	if err != nil {
		return nil, fmt.Errorf("error reading file %s: %w", filename, err)
	}

	var cv CV
	if err := json.Unmarshal(data, &cv); err != nil {
		return nil, fmt.Errorf("error parsing JSON: %w", err)
	}

	// Replace {{YEAR}} placeholder in reference URLs with current year
	currentYear := fmt.Sprintf("%d", time.Now().Year())
	for i := range cv.References {
		cv.References[i].URL = replaceYearPlaceholder(cv.References[i].URL, currentYear)
	}

	return &cv, nil
}

// replaceYearPlaceholder replaces {{YEAR}} with the current year
func replaceYearPlaceholder(url string, year string) string {
	return strings.ReplaceAll(url, "{{YEAR}}", year)
}

// LoadUI loads UI translations from a JSON file for the specified language
func LoadUI(lang string) (*UI, error) {
	if lang != "en" && lang != "es" {
		return nil, fmt.Errorf("unsupported language: %s", lang)
	}

	filename := fmt.Sprintf("%s/ui-%s.json", c.DirData, lang)
	filepath, err := findDataFile(filename)
	if err != nil {
		return nil, err
	}

	data, err := os.ReadFile(filepath)
	if err != nil {
		return nil, fmt.Errorf("error reading file %s: %w", filename, err)
	}

	var ui UI
	if err := json.Unmarshal(data, &ui); err != nil {
		return nil, fmt.Errorf("error parsing JSON: %w", err)
	}

	return &ui, nil
}