package staff

import (
	"regexp"
	"strings"
)

// UniversityPatterns contains URL patterns for specific universities
type UniversityPatterns struct {
	patterns map[string]UniversityConfig
}

// UniversityConfig contains crawling configuration for a specific university
type UniversityConfig struct {
	StaffListURLs    []string          // URLs to staff listing pages
	StaffLinkPattern *regexp.Regexp    // Pattern to identify staff profile links
	NameSelector     string            // CSS selector for person name
	PositionSelector string            // CSS selector for position
	EmailSelector    string            // CSS selector for email
	PhotoSelector    string            // CSS selector for photo
	Extractors       []string          // List of extractor types to use
}

// NewUniversityPatterns creates a new pattern registry with known patterns
func NewUniversityPatterns() *UniversityPatterns {
	p := &UniversityPatterns{
		patterns: make(map[string]UniversityConfig),
	}

	// Register known university patterns
	p.registerKnownPatterns()

	return p
}

// GetConfig returns the configuration for a university domain
func (p *UniversityPatterns) GetConfig(domain string) *UniversityConfig {
	// Normalize domain
	domain = strings.ToLower(domain)
	domain = strings.TrimPrefix(domain, "www.")

	if config, ok := p.patterns[domain]; ok {
		return &config
	}

	// Try partial match
	for key, config := range p.patterns {
		if strings.Contains(domain, key) || strings.Contains(key, domain) {
			return &config
		}
	}

	return nil
}

// registerKnownPatterns registers patterns for known German universities
func (p *UniversityPatterns) registerKnownPatterns() {
	// KIT - Karlsruher Institut für Technologie
	p.patterns["kit.edu"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.kit.edu/kit/fakultaeten.php",
		},
		StaffLinkPattern: regexp.MustCompile(`/personen/\d+`),
		NameSelector:     ".person-name, h1.title",
		PositionSelector: ".person-position, .position",
		EmailSelector:    "a[href^='mailto:']",
		PhotoSelector:    ".person-image img, .portrait img",
	}

	// TUM - Technische Universität München
	p.patterns["tum.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.tum.de/die-tum/fakultaeten",
		},
		StaffLinkPattern: regexp.MustCompile(`/person/\w+`),
		NameSelector:     ".person-name, h1",
		PositionSelector: ".person-title, .function",
		EmailSelector:    "a[href^='mailto:']",
		PhotoSelector:    ".person-photo img",
	}

	// LMU - Ludwig-Maximilians-Universität München
	p.patterns["lmu.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.lmu.de/de/die-lmu/struktur/fakultaeten-einrichtungen-zentren-und-weitere-institutionen/",
		},
		NameSelector:     ".person h2, .staff-name",
		PositionSelector: ".person-position, .staff-position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// RWTH Aachen
	p.patterns["rwth-aachen.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.rwth-aachen.de/cms/root/Die-RWTH/Fakultaeten/~ep/Fakultaeten-und-Einrichtungen/",
		},
		NameSelector:     ".person-name, h3.title",
		PositionSelector: ".person-function, .position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// TU Berlin
	p.patterns["tu-berlin.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.tu.berlin/ueber-die-tu-berlin/organisation/fakultaeten-und-einrichtungen",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".position, .function",
		EmailSelector:    "a[href^='mailto:']",
	}

	// FU Berlin
	p.patterns["fu-berlin.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.fu-berlin.de/einrichtungen/fachbereiche/",
		},
		NameSelector:     ".person-fullname, h2",
		PositionSelector: ".person-position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// HU Berlin
	p.patterns["hu-berlin.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.hu-berlin.de/de/einrichtungen-organisation/fakultaeten-und-institute",
		},
		NameSelector:     ".person h2, .name",
		PositionSelector: ".function, .position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Freiburg
	p.patterns["uni-freiburg.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://uni-freiburg.de/universitaet/fakultaeten/",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".person-position, .function",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Heidelberg
	p.patterns["uni-heidelberg.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.uni-heidelberg.de/de/fakultaeten",
		},
		NameSelector:     ".person-fullname, h2",
		PositionSelector: ".person-position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// TU Dresden
	p.patterns["tu-dresden.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://tu-dresden.de/tu-dresden/organisation/bereiche-und-fakultaeten",
		},
		NameSelector:     ".person-name, h2.name",
		PositionSelector: ".person-function, .funktion",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Leipzig
	p.patterns["uni-leipzig.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.uni-leipzig.de/universitaet/struktur/fakultaeten",
		},
		NameSelector:     ".person h2, .name",
		PositionSelector: ".position, .funktion",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Köln
	p.patterns["uni-koeln.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.uni-koeln.de/",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".person-position, .function",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Bonn
	p.patterns["uni-bonn.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.uni-bonn.de/de/universitaet/fakultaeten",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".person-position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Münster
	p.patterns["uni-muenster.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.uni-muenster.de/de/fakultaeten.html",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".person-function",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Hamburg
	p.patterns["uni-hamburg.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.uni-hamburg.de/einrichtungen/fakultaeten.html",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// Universität Göttingen
	p.patterns["uni-goettingen.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.uni-goettingen.de/de/fakultaeten/27952.html",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".person-position",
		EmailSelector:    "a[href^='mailto:']",
	}

	// TU Darmstadt
	p.patterns["tu-darmstadt.de"] = UniversityConfig{
		StaffListURLs: []string{
			"https://www.tu-darmstadt.de/universitaet/fachbereiche/index.de.jsp",
		},
		NameSelector:     ".person-name, h2",
		PositionSelector: ".person-position, .funktion",
		EmailSelector:    "a[href^='mailto:']",
	}
}

// CommonStaffPagePaths returns common paths where staff listings are found
func CommonStaffPagePaths() []string {
	return []string{
		"/personen",
		"/team",
		"/mitarbeiter",
		"/mitarbeitende",
		"/staff",
		"/people",
		"/ueber-uns/team",
		"/about/team",
		"/fakultaet/personen",
		"/institut/mitarbeiter",
		"/lehrstuhl/team",
		"/personal",
		"/beschaeftigte",
		"/dozenten",
		"/professoren",
	}
}

// CommonPersonSelectors returns common CSS selectors for person elements
func CommonPersonSelectors() []string {
	return []string{
		".person",
		".person-card",
		".staff-member",
		".team-member",
		".mitarbeiter",
		".employee",
		".vcard",
		".h-card",
		"[itemtype='http://schema.org/Person']",
		".person-entry",
		".staff-entry",
		".profile-card",
	}
}

// TitlePrefixes returns common German academic title prefixes
func TitlePrefixes() []string {
	return []string{
		"Prof. Dr. Dr. h.c. mult.",
		"Prof. Dr. Dr. h.c.",
		"Prof. Dr. Dr.",
		"Prof. Dr.-Ing.",
		"Prof. Dr. rer. nat.",
		"Prof. Dr. phil.",
		"Prof. Dr. jur.",
		"Prof. Dr. med.",
		"Prof. Dr.",
		"Prof.",
		"PD Dr.",
		"apl. Prof. Dr.",
		"Jun.-Prof. Dr.",
		"Dr.-Ing.",
		"Dr. rer. nat.",
		"Dr. phil.",
		"Dr. jur.",
		"Dr. med.",
		"Dr.",
		"Dipl.-Ing.",
		"Dipl.-Inf.",
		"Dipl.-Phys.",
		"Dipl.-Math.",
		"Dipl.-Kfm.",
		"M.Sc.",
		"M.A.",
		"M.Eng.",
		"B.Sc.",
		"B.A.",
	}
}

// PositionKeywords returns keywords that indicate staff positions
func PositionKeywords() []string {
	return []string{
		// Professors
		"Professor", "Professorin",
		"Ordinarius",
		"Lehrstuhlinhaber", "Lehrstuhlinhaberin",
		"Dekan", "Dekanin",
		"Rektor", "Rektorin",

		// Research staff
		"Wissenschaftlicher Mitarbeiter", "Wissenschaftliche Mitarbeiterin",
		"Akademischer Rat", "Akademische Rätin",
		"Postdoktorand", "Postdoktorandin",
		"Doktorand", "Doktorandin",
		"Promovend", "Promovendin",
		"Forscher", "Forscherin",
		"Researcher",

		// Teaching
		"Dozent", "Dozentin",
		"Lektor", "Lektorin",
		"Lehrbeauftragter", "Lehrbeauftragte",

		// Administrative
		"Sekretär", "Sekretärin",
		"Geschäftsführer", "Geschäftsführerin",
		"Verwaltungsleiter", "Verwaltungsleiterin",
		"Referent", "Referentin",

		// Students
		"Studentische Hilfskraft",
		"Wissenschaftliche Hilfskraft",
		"Tutor", "Tutorin",
	}
}